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‘ Nov. 26, ‘1946.
2,411,618
H. F. ELLIOTT
CONTROL APPARATUS
4 Sheets-Sheet 1
Filed Dec. 16, 1945
2,
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2W%3/:91351 !
INVENTQR.
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BY
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Nov..26, 1946.
H. F. ELLIOTT
. 2,411,618‘ 1
CONTROL APPARATUS
Filed Dec. 16, 1945
4 Sheets-Sheet 2
INVEN TOR.
JYQmZdFZZZwE,
.
BY
7
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Nov. 26, 1946.’
H. F. ELLIOTT
Q
'
2,411,618
CONTROL ‘ APPARATUS
Filed Dec. '16, 1943
4 Sheets-Sheet s
[35;
'
137v
3 1 136
13b
IN VEN TOR.
wxmwaé
Nov. 26, 1946.
H. F. ELLIOTT
2,411,618
CONTROL APPARATUS
Filed Dec. 16, 1943
4 ‘Sheets-‘Sheet 4
INVENTOR.
I
?’amZdFEdwZ/i
2,411,618
Patented Nov. 26, 1946
‘ - UNITED
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STATES PATENT
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7
2,411,613
OFFICE
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e
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GQNTRQL APPARATUS
Harold F. Elliott, Belmont, Mass:
1 Application December 16, 19,43,v Serial'No. 514,462
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,
'21 Claims.
'
(01. 751119)
A
A I
in eeetrel meehenieme-eee mere pertieulerly to
imprqred eemrel
rates. for autemetieelly
err; accurately were a‘ redie reeeivine system
129 ear-desired meet a. plurality 9f eienel chan
nels.,
'
A
2
isrnaii size is provided which inpludes improved
.ieeilities fer were eeewerfi? leekilie ‘Ce-111'
nection between the relatively inqvable parts or
the meellenieee when‘they" ere ‘moved'inté bre
The ereeent ieventienreletee to improvements
deterneined ¥e1e?vepeeiti0n$¥
'
‘
“
'
, In accordance with yet another object oi the
A
invention, all parts of the 'lost-motion' “mecha
nism are positively operatéd'in order to prevent
inadvertent relative movement theréhetween and
eeiver; weigh ‘is extremely eeeurete and vpeeitive
in ite eperatiee t9 mevetlee frequency changing 10 thus eliminate‘ any pgssibility of thedesiredv free
travel range of‘ the mechanism being reduced gr
mee. " teeny eetti-ne eeelfeepenqine to e desired
eggoeeded during:aotuationoftiie mechanism; ‘ "
etetien, eeim t, in arrangement, ‘and is of
According to'stiii another- objeot of the inven-j
entree end iee ..ive eeeet'ruetienl
rice, the control units are err'enleed'fer eeleetive
i ,It isermther eet ef the invention to Previde
eentroi agparatus‘ gt 7 the haracter described, 15 operation by driving Ineans common to the units,
and improved" connector ‘ftao'il'ities are provided
tine .eent e1 emit ef 1.’ pmv‘ee 'r-ue'eed eeri
for positively‘preventing the nonrselecteti units
struetien. is prevleljedi ‘fee mevlrigj the sett'eble ele
it is en. ebieet ef, the preeent invention to Pre
tiide automatic’ tuning apparatus for‘ a radio‘ ‘re
ment .9? the Lfreeueney Cheri-gin? mean-e into each
re?etermieee setting ensi' ier' locking the ele
reene in the eetebliehee setting» While e’? the same
ing meane-
20 j
eme-eermittmeehe were elemene'te heme-‘led
in eitherv qireetiee
r
e
_1
A .
-
.
a
I
.
,
.
A
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A,
provide an improved and exceedingly rugged
" ism ‘for 'limiting'rotary movement of the
from the established
setting Wheneeteeteq through a .eeeond control
unit eerreseeneirie tee di?eirent predetermined
gemm
.
It ‘is a Still further object of the invention to
A
25?
tclcording ‘to a further object ‘of the invention, _ _1
i A ..
eentre-l Shaft ‘@Q a pfedeterminedreteé
tionairange' and for 'relea‘sa'bly locking the'cone;
?re!‘ 113E511? idi?erent adjusted Settings. tie‘ ere?
yide for o'pjeration'ot the ‘rotary control‘snaft
W the perti'elf?ef: Pr'edetem?nedf eettinee whileh
'theeetteble'eiemelit of thetiminemeene‘ is driven
may be‘d'esi'red.
.
'
1
‘
by a rotary control‘ shaft andéaeh control unit
The inre v'tion," both as to its organization and
is provided with twopositiwely acting lest-motion
9f eperetien; eeeether ‘With further ob
reeeheniemeof smell ahd‘en improved rugged 30 imethed.
jects and advantages thereof, v‘will best be under?
§P¥L1CW¥EQ fer establishing the driving and leek
stood “by reference. to the‘follow'ing vspeci?cation
ing eonnections required tn. actuatedtlie rotary
eotntrolvlshatft to the desiredsetting' andthen stop - 'lelrawirges,
tglgg?
in
cQnnection
which; ~ with
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~
A‘
,
, .
theveame with Preeisier} accuracy, arid also‘ 101"
Fig.
~17
is
a
partially‘
diagrammatic
'view
till-us:
‘Permitting eiwide?renee ef adjustment of this,
tratine. the eenerellerraneement 10f improved
TeheftWhe-h eemae'éd t'hmugn others 61th.; 9911;.
talents,
"
"
~
control apparatus cheraeterizegl by tile 'reeturee
A
of the‘ present inVBIl'tiQn;
’ Aewrdine- he enethertebieeeefthe inrentien, .
Fig. 2 isa fragmentary view, ‘partially in see:
eflqstémetigp ‘ meehamsm 11$. extremely rugged
.eempaee ewe-‘erection, and yet permitting a
large amount of relative mpyernent between two
‘of ‘the parts thereoj, Vis- émp yed, to: establish: a
4.0 't-ion', illustrating the structural, arrangementof '
those portions of the apparatus vshown in Fig. 1
whioh are essential" to an understanding of the
meellenieel drivel er leekieg- eeneeetion between
the two Part5» thereby tel enhenee the aeeuraey
with which a leetteble element ererated through
Flee meehehilsm may be mailed he a predetermined
lsgimngé
._
_
_.
he eeeerdenee
"
'
Eig: _3 is a ‘side sectional View‘ further iiiu'tstratl
ing the left end portion of the" apparatus snown
Yin Fig- 2;
'
'
'
Fig‘, 4 is an end View partially inseption, 11-11115.
'§ ‘?eeing the eeiietfuetie? er the reentr'iflieel'ewiteb
.i'l-iveetiehithe 1 5.. _
‘provided in the apparatll.s_;.
tieereeeheei'em
by arranging ‘parts
0;,thereof
A .
neon .eat;
,. '
- sides/Moi, the eetuetieg. element:- or
'
9:95.933?’ invention;
the
vFig. 5 is. 5;,v fragmentary end seetionalyiew of _
the apparatus shown in Fig. 2' iilustratingtlile
construction of one" of the: .eontroi ~,iuiits provided
tion,‘ a" 'lostémotion mechanism. ‘of exceedingly‘ 55 : Eis- 6 .ie e ?eewheerrend View ef- the eeetir'el
mechanism;
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>
‘
A: jamming:mesa}memiemr the inven
' in vthis apparatus;
sures
3
4
unit shown in Fig. 5, as viewed from the reverse
side thereof and is provided with a rotor shaft
side thereof;
Fig. 7 is a detail view illustrating the mode of
II which extends through an opening in this
frame member and carries the driving gear l2.
coaction of two of the stop parts embodied in
As clearly shown in Fig. 3 of the drawings, the
.
the control unit shown in Figs. 5 and 6;
Cl drive gear I2 is slip clutch connected to the pro
Fig. 8 is a diagrammatic view illustrating the
jecting end of the motor shaft II by means of a
arrangement of the circuit provided to control
slip clutch assembly which comprises a friction
the apparatus shown in Figs. 1 and 2;
collar III), a sleeve [la and a dish-shaped spring
Fig. 9 is a sectional view taken transversely
washer ||d. At its extreme left end,v the shaft
through the apparatus shown in Fig. 2 to illus 18 II also supports the movable parts of a centrif
trate the details of the stop assembly provided in
this apparatus;
ugal switch indicated generally at l3. More in
_ detail, the parts Nb and | Id of the slip clutch
assembly, together with the housing cup |3a of
the centrifugal switch l3, are supported upon
Fig, 11 is a side sectional view of the modi?e
v the sleeve ||a which is keyed or otherwise rig
control unit structure shown in Fig. 10.
idly secured to the end of the shaft II for rota
Referring now to the drawings, and more par-'
tion therewith. The ‘friction collar ||b is in
ticularly to Fig. 1 thereof, the control apparatus
turn set screw mounted upon the sleeve Ila so
there illustrated is particularly adapted to be em
that the gear i2 and the bottom of the cup |3a
bodied in a radio receiving system for the pur
are con?ned between this collar and the ?ange
pose of selectively and automatically operating
||c of the sleeve ||a by means of the spring
the frequency changing means of the system to
washer lld. With this arrangement, the two
different predetermined settings respectively cor
parts |3a and I2 are mounted for rotation rela
responding to different predetermined signal
tive to the shaft H but are normally restrained
channels. More speci?cally, the rotor plates of ; against such relative movement by means of the
the tuning condensers provided in a radio receiv
spring washer ||d which is held under tension
ing system may be mounted upon the rotor shaft
between the sleeve ‘flange He and the adjacent
3| for rotation between predetermined limits de
inner surface of the bottom of the cup |3a.
?ning the tuning range of the system. The iden
Within the rim of the cup |3a there are provided
Fig. 10 is an end elevation view of a‘modi?ed '
control unit structure; and
~
ti?ed shaft is adapted to be actuated to any one >
two centrifugally actuated parts |3b and |3c
of a plurality of different settings, respectively
corresponding to different signal channels or sta
tions, by a single driving motor It. This'motor
is arranged to rotate the rotor shaft 3| through
which, as shown in Fig. 4 of the drawings, are
pivotally supported upon the bottom wall of the
cup |3a at the opposed ends thereof by means of
pivot assemblies I3d and l3e. These parts are
any one of a plurality of driving connections
hollowed out, as shown in Fig. 3, to provide a re
'whicheommonly include the gears |2, |4, |5, l7,
I9, 26, 21, 29 and 3|), and also commonly include
?ange ' | i0 and the friction washer ||d are re
the three shafts ||, 2| and 28.
ceived, and are provided with faces which meet
Individually, the
cess within which the end of the shaft II, the
driving connections include diiferent ones of a
on a line and are held in engagement by means
plurality of control units 22a, 221), etc.
of two small biasing springs I31‘ and I3g. The
line of meeting engagement between the faces of
the two centrifugal parts |3b and |3c is inter
sected by the axis of rotation of the shaft | | and
at this pointof intersection, a prick punch re
cess |3Ic is provided to seat the point of a conical
contact actuating element l3h. This element is
carried by the free end of amovable contact spring
911 which is includedina contact spring assem
bly 9, andtis utilized to govern the operation of
the motor I0 and the various control units 22 in
the manner more fully pointed out below. This
assembly includes three contact springs. 9a, 9b
One of -
these control units, i. e. the unit 22a, is illus
trated in Fig.1 of the drawings as comprising two
enlarged driving gears or actuating members 23a
and 24a, two pinions 46a and 45a which mesh with
each other‘and respectively mesh with the gears ‘
24‘aand‘23a, and a connector mechanism which
includes the two meshing pinions 38a and 31a,
the ?rst of which is adapted to ‘be moved into
meshing ‘engagement with the pinion 45a and
‘the second of which is mounted for rotation with
the shaft 2|. Each control unit further com
prises a pair of lost-motion mechanisms of the
character shown in Figs. 2, 5, 6 and 7 of the draw
and 90 which are insulatedfrom each other and
ings, through which driving and locking connec
tions maybe provided between the gears 23a and
are mounted upon the supporting member 64 by
means of a supporting assembly 8 of‘ conventional
24a and the shaft 25.
arrangement. The center spring 9a is, through
engagement of the actuating element I371, with
the two centrifugal parts I31) and I30, normally
held under tension in. a position such that the
For the purpose of visu
ally indicating the different settings to which the
rotor shaft 3| may be actuated, an indicating
gear 33 is provided which meshes with a gear
32 carried by the shaft 28 so that it will be ro
tated concurrently with rotation of the shaft 3|.
At the front side thereof, the gear 33 may be
provided with suitable scale markings which when
indexed with a;viewing window or line, identify
the different predetermined settings of the rotor
shaft 3|.
'
i
More speci?cally considered and as best shown
in Fig. 2 of the drawings, all parts of the control
apparatus illustrated in Fig. 1 are supported be
contact carried thereby engages the contact pro.~
vided at the free end of the outer contact spring
917. During rotation of the shaft, however, when
theparts I31) and |3c of the centrifugal switch
are pivoted radially outward from the axis of
rotation of the shaft | | against the biasing forces
‘of the two springs l3)‘ and |3g, the conical end
of the element |3h entersthe gap between the
two parts permitting the contact‘ carried by the
tween or upon two spaced-apart parallel extend- 7
spring ‘9a to engage the inner contact spring 90
and then move away from‘ the engaged contact
ing frame members 64 and 65. These members
of the'outergspring 9b.
have ‘suitable tie rods extending therebetween for
the purpose of providing an entirely rigid and
rugged supporting structure. The motor I0 is
mounted upon'the ‘frame member 64 at the rear‘
7
' The two gears II and |5 are rigidly connected
for rotation together and are supported upon a
bearing shaft l6 which is threaded into an open
ing provided in the'supportingmember 64.. Simi
singers
5
thereof is riding over the-periphery of the ring
iarly; the gear; “which meshes. ‘with; the two
the angular position of the star wheel 48a relative
to the actuating member 23a cannot be altered.
"gears l5, and I9 is rotatably'supported bya stub
shaft ‘l8 which is threaded into the supporting
member?'ft. '1 A yielding connection indicated gen
ier'ally'at 20' is utilized to.’ transmit rotary move
ment ‘from the gear 19 to theshaft 2i, thiscon
'At apredetermined point around the periphery
thereof, the ring 51a is provided with a recess 58a
into which thelpoints of the star'wheel may be
'l'succe'ssively rotated during succeeding revolu
tionso-f the actuating member23a about the hub
~hectiongcomprisingjajspring member ‘20b which
partially surrounds the hub- [9a, upon which?‘ the
gearv |_9,.i'_'s rotatablyfmountediis anchored togthis‘
sea.
10
hub at one end ‘and at the oppositeyend is-an
chore'd to a pin, not shown, extending ‘outwardly
‘with the shaft 2| and alhousing cup'ZBa is uti
lized to enclose this hub and‘the spring member ‘
'
The six shaftsll, '35, 36, 257, 28 and 3! ‘are also
‘supported by the t'wojframe members 64 and 65.
Thus,’ and as shown in
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‘4m and$5la through a predetermined angle in
response to. rotation of- the actuating member
through one revolution about the hub 59a, this
hub is provided at a predetermined point around
from the face of the gear [9. The hub [9a is
keyed or otherwise rigidly mounted for rotation
206 which partiallysurrounds the same. '
'
vlldlorstheinrriposeof rotating the meshing pinions
its periphery with’ an axially extending rib or
single'gea-r tooth 600. which extends normal to
the face of the actuating member 23a. This single
gear tooth isarrangedto mesh with different ones
of the» teeth of the ‘pinion 41a during succeed
ing revolutionsof the actuating member 23a. about
the hub 59a, whereby the meshing pinions 52a
3 of the drawings,
roller bearings respectively carried byv the two
supporting members 6'4 and '65 are utilized as
and 41a, the shaft 49a and the star wheel 48a are
rotatedi'through a predetermined angle relative
to the'actuating member 23!; during each revolu
tion o'fthis'memiber. In this regard. it is noted
that the‘ angular settings of the star wheel 148a
and the pinion 411a are so related. to each other
and to {the relative {angular positions of the detent
bearing supports for the shaft 2| . The two idler
pinion shafts 35 and 36. are each supportedat the
ends thereof within opposed openings provided
with hubs 'forme'd, integrally with the two
supporting members and extending toward each
other from the inner‘faces of these two members.
Ball ‘bearings 66 and 61 are utilized‘ to support the
‘58a and the singleltooth 60a that one of. the
rotary control shaft25 at points inwardly of the
opposed ends of thislshavft, Similar bearing struc- ~ .'
tures are utilized for the purpose of rotatably sup
porting the two shafts 28 and 3i upon the two
supporting members ‘64 and65.. vThe bearing sup—
ports. for these shafts are not shown in the in
points of the star wheel iis-ibroughtinto registry
with the center of the detent‘ 58a each time the
tooth 60aengages'one 10f the teeth of the pinion
411a. Assembly of the parts to provide this de
sired predetermined angular relationship there;
terests of limiting the, disclosure to those parts =- ' between is fancilitated'v by making the star wheel
48a! and the pin 4'90, of ones-piece construction and
“which are essential ‘to: an' understanding of the
by ?attin'g the end of, this ‘pin as indicated at 50a
tol-coact with a :?atted portionvof the opening‘ in
As. shown in Fig. 2 01 the drawings, the several
the
pinion ‘L‘lwthrough which the pin 49a ex
control units are axially‘disposedl alongjthe rotary
tends. The‘ two ‘pinions 4.1a. and 5.1a are pro
present. inventioml'
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lvcontrol shaft‘25jand are of identical ‘construction
;v-ided with- unilikeinumbers of‘ teeth; the pinion
and. arrangement. _ vAccordingly, the arrangement
Wm having a greater number of teethv than the
pinion 54a such that'the-latter is rotatedthrough
more than one’ revolution for each revolution
of- the pinion 41a. Between these pinions and
offthese units will be readily understood ‘from a
consideration of the control unit 220., the parts
I'oI which, are'd‘etailed'in Figs. 2,5, 6,.and 7’ ofthe
drawings. ""Thiscqntrol unit is‘divided into two
‘the inner side of» theactuating' member 23a
*there are provided two 'coacting .stop parts ‘550.
halves which ‘are operative to rotate the shaft '25 .
‘to a predeterminedfsetting from either direction
;and;topprovide,a ‘connection for locking this shaft ‘
‘against further-rotation when the predetermined
54a‘ atv the ‘outer periphery thereof, and may be
commonly supported: uponahub 59o ‘which is
spaced,v from the ‘shaft'25 by means offa'iybushing, '
actuating member inptheiform of a gear 23a’whibh
is rotatably-supported upon the stepped’ portion
‘60,11, of the hub ‘59a andfmeshes with the idler
pinion 4511; At? the outer side of the actuating
‘memb'erziia, a detent collar 51a is provided which
“,i'sfseated upon the stepped portion Bio of the hub
59a and at its inner edge-is rigidly securedto ‘this
hub; ‘At, the inner sideof" theac'tuatingmember
23ajand,spacedradially from the axis of the shaft
e25,’ a pinion set is provided which comprisesjtwo
‘meshing pinions 51a and Ho having different
429a and the axis pin-52a. vThe part‘55a is in the
gform'oi an annular ring having a single- tooth
setting is ‘reached’, _A-l1;parts of p the unit are
‘52a; \The ?rstv ‘half of theiunitjcomprises an
and'EBa ‘which are respectively carried by the pin
formed integrally with the pinion 41a. Alterna
. "'ti'vely," ‘thisfpart' may "be pinned or otherwise I
.i rigidly‘f'connected. to ‘the pinion 41a. The coaet
'ing‘part-"SSa, is likewise'inth-e form ofgan annu
lar ring 156a, having a blank’ double tooth >530;
, provided at a predetermined point around the
lpperipheral surface ‘thereof,v and may either be
formed integral'vwith'the ‘pinion 5l'a or maybe
"00 I ‘fixedly
connected to this ‘pinion;
“this arrangement, the single tooth 54a
'mayibecperated to engagethe blanked out por
itionjof'the double tooth 53a when the two pinions
Ha’ and-51a occupy-predetermined relative posi
"numbers of teeth. The ?rst of these pinions‘ is I cations: "When these two parts are thus lockingly .
rotatably supported "upon an ‘axis pin 52a and
engaged, ‘relative-rotation between the two pinions
the second pinionis mounted for rotation with an
“wand '51 a in‘one directionTi-s prevented, where
I ‘by upon rotation of" theactuating-member 23a to
'brin'g-"oneibfthe teeth of the'pini'on 41a into -en
axis‘ pin 49a journaled in anwopening through the
actuating'member ‘23a. Upon the opposite or
outer sidevof the actuating member 23a the pin; "[0 ‘gagement with the single tooth 69a of- theshub‘ 59a,
49a carriesa star‘ wheel 48d having six‘points ‘ 'sa'direc't émechanical connection is provided he
' :tween the‘ actuating 'member 23a and-the ‘hub
arcuate con?guration. "Each-ofithesesur-faees vhas ' 559a: .iRela-tiivelrotation oi‘v the. pinions 41a ‘and
aradius which-slightly exceeds the outerfradiu‘s , .V-‘S‘II'aB-in'ithe; reverse direction, i. .e; inza ,direction‘ito
vwhich are connected'fby edge surfaces of- concave
“of ‘the detent ring 15711; ‘so’ thatiwhen Kai-1w one '
12,411,618
7
engagement, is permitted however. Because of
the different numbers of teethrwith which the}
two pinions 5m and 41a are respectively pro
vided, no further engagement between the two
locking teeth 54a and 53a can occur until after
the pinion 410. has been reversely-rotated a pre
determined number of revolutions relative to the
actuating member 23a. After a predetermined
number of revolutions of the pinion 41a in'the
reverse direction, the two lockingteeth 53¢ and 10
54a are of course moved back into engagement
to establish a new locking connection between
the actuating member 23a and the hub 59a.
nected parts 410.’, 48a’, 49a’ and 55a.’ whichare
arranged to be rotated relative to the "actu?
ating member 24a by the single tooth 50a of the
hub 59a. The star wheel 48a’ is arranged to
coact with a detent ring-51a‘ rigidly mounted
upon a second stepped portion'of the hub 59a
to limit, rotation of the pinion 41a’ and the parts
fixedly and pivotally connected therewith to a
predetermined fraction of a revolution during
each revolution of the actuating member 24a
about the hub 59a.
‘
.
wheel rides over the periphery of the ring 51a '
‘As indicated above, the two actuating members
23a and 24a of the control unit 22a. respectively
mesh with idler pinions 45a and .460. which mesh
with each other and are rotatably supported upon
the shafts 35 and 36, respectively. The pinions 45
individual to the various control units are spaced
along the shaft 35 and each thereof is providedwith
a toothed portion and a spacing portion. A sleeve
35a carried by the shaft 35 adjacent.v the left end
thereof is utilized to prevent movement of the
idler pinions 45 axially ofthe shaft and to thus
maintain these pinions in meshing engagement
with their respective associated actuating mem
bers 23. In an entirely similar manner, the pin
ions 46 carried by the shaft 38 are self-spacing
and are rotatably supported by the shaft 36, a
sleeve being provided at the left, end of this shaft
36 to prevent axial movement of the pinions 48
along the shaft. The sleeve _62e, which supports
the parts of the last control unit'22e upon the
rotary control shaft 25, is provided withan ex
tended ?anged portion against which the hub of
this control unit is adapted to be/clampedJ This
portion of the sleeve 62c is also provided with an
annular seat at the inner periphery thereof which
is adapted to receive a ?anged porring portion
25a of the rotary controlshaft‘. Thus, this shaft
portion acts as a stop against which the hubs 59
of the various control units may be clamped to
lock the same against rotary movement relative to
the shaft 25, The bushingsv 62 are ‘clamped
against the ring portion25e ofthe shaft by means
of a clamping member is which is threaded onto
a threaded portion 25a of the ,control shaft and
is provided with an annular portion 68b,the rim
of which is adapted .toibelclamped, against, the
adjacent surfaceof the bushing 62a through a
spring washer 12a. Similarspring washers are
interposed between the sleeves and _hubsof the
to lock the shaft 56a and thetwo meshing pinions
‘respective control units alongfthe'shaftZE. lThese
From the above explanation it will be apparent
that since the pinion 41a. is rotated through only 15
a fraction of a revolution in response to each
revolution of the actuating member 23a about
the hub 590., a large number of revolutions of
the actuating member are required in order to
rotate the two stop parts 55a and 56a from‘ one
position in which the locking teeth 53a and 54a
are engaged to a new position of engagement
between these teeth. Thus, if;the pinion 41a
is provided with twelve teeth and ‘the. smaller
pinion am is provided with eleven teeth, and 25
the pinion 41a. is rotated through a sixty degree
angle de?ning two complete tooth points during
each revolution of the actuating member 23a
about the hub 59a, sixty-?ve revolutions of
the acutating member 23a about the hub 30
59a are required in order to rotate the parts
56a and 55a from one point .at which the
teeth thereof are lockingly engaged to a second
point at which these teeth are again moved into
engagement. This lost motion between the two 35
parts 59a and 2300f the control unit constitutes
the range of free travel within- which maybe
embraced all of the several predetermined settings
which may be imparted to the rotor shaft 3| by
the respective control units. As indicated above,
the star wheel 48a, through its ooaction with the
detent ring 51a, functions to limit rotation of the
two pinions 41a and 5m precisely to predeter
mined fractions of a- revolution during each
revolution of the actuating member 23a about
the hub 59a. The arrangement is such that
‘when the single tooth 60a of the hub is out of
engagement with the teeth of the pinion 41a, one
of the six concave peripheral surfaces of the star
41a and Ella against rotation relative to the;
washers,together with the bushings 62, are keyed
to the shaftZSHby. means of ‘a key 63a which lies
within alignedkeyways cut at the _innerv sides of
member 23a is rotated to engage one ofthe teeth
of the pinion 41a with the tooth 60a, a pointof . the bushings and a keyway c'ut axially of the shaft
-25. With this arrangement, the bushings 62 .and
the star wheel 48a. is simultaneously brought into
the spring washers ‘l2 may be clamped against the
coincidence with the depression 58a permitting
ring portion 25c of-the shaft 25.by.1 threading the
the connected parts 41a, 49a, 55a and 48a. to be
clamping member 68 upon the threaded portion
rotated relative to the member 230.. The extent
of this rotation is of course limited to that vre 60 25a of this shaft. The clamping‘ pressure. thus
produced serves to prevent movement of the bush
quired to bring the next succeeding concave sur
ings axially of the shaft, and the. key 6311 serves
face of the star wheel back into sliding engage
to prevent relative rotary movement between the
ment with the periphery of the ring 51a. _With
bushings and the shaft. ,The hubs 59 individual
a six point star wheel, the extent of rotation of
to the various control units are normally clamped
the identi?ed parts relative to the actuating
to the shaft ring portion 25c fOrrOtatiOn-With the
member 23a is of course limited to an’ angle of
bushings 62, but may be released for rotation to
sixty degrees, representing a tooth displacement
‘new settings relative to the shaft 25._by means of
of two teeth on the twelve tooth pinion 41a.
actuating member 23a. When, however,» the
an improved releasable locking assembly. .
The structuralarrangement of the second half
of the control unit 22a exactly duplicates that 70' This assembly comprises a locking washer or
ring ‘ll having ?ngers received within slots 68c
just described. Thus, it will be noted that the
[extending axially of the annular portion 68b of
actuating member 24a is rotatably supported upon
the clamping member 68 toprevent relative rotary
a stepped portion of the hub 59a at the right end
movement between the two jrnamed parts;- ; The
of this hub, and at a point radially disposed from
the axis of the shaft 25, carries the four con 75 assembly; further ‘comprises a traveling nut ;69
2,411,618
.9 i
10
which is threaded on the threaded portion 68a of
and the stationary member 23 1‘ through the parts
the clamping member 68 and isprovided with
gear teeth around the outer periphery thereof
adapted for meshing engagement with a small
gear 83 carried by a-locking shaft 15. Balls '15
comprising the pinion 411'’, In this regard, it
is noted that the stationary member 23)‘ is pro
vided with gear teeth around the periphery
disposed within a ball' race formed in the front
thereof, any one of which may be engaged with
side of the traveling nut 69 are, interposed be
tween this nut and the locking washer ‘H to
reduce the frictional engagement between these
two parts. The shaft 15 is journaled within sleeve
bearings 18 and 19 respectively supported by the
twosupporting members 64 and 65. It is slidable.
Within these bearings betweenulimits de?ned by
engagement of the shaft. rings ‘I5 and T! withgthe
a bracket 64g extending outwardly from the sup
porting member 54f to prevent rotation of this
of the other lost-motion pinion set, i. e. that
member. It is noted further; that the two lost
motion pinion sets are provided to limit the
rotation of the shaft 25 toa'range which is sub
stantially less than the free travel range of ‘either
pinion set considered alone. As a result, stand
ard parts may notonly be used in the manufac
supporting members (ity and 65. Normally. this 15 ture ‘of the several control units 22a to 22c in
clusive, but these same parts may be used in
shaft 15 is biased to a position such that thering
making up the locking assembly 22]‘. Thus, all
‘l6'engages the supporting member 64 and the gear
parts of this assembly, including the detent ring
83 is'out of meshing engagement with the travel
51-)‘, are exact duplicates of the corresponding
ing nut 59. This bias is provided by a coil spring
parts making up the control unit 22a, for ex
80 which surrounds the shaft and is tensioned be
ample, with the exception that the member 23)‘
tween the supporting member 54 and a cup
is provided with two, openings instead of one in
shaped nut 8|, threaded-onto the left end of the
order to make provisions for supporting the two
shaft. A locking nut 82 also threaded onto the
sets of lost~motion pinions.
‘
t
left end of the shaft 25 is utilized to lock the
For the purpose of selectively connecting the
cup-shaped nut Bl against rotation once the
position of this nut upon the shaft has been
established‘ to properly tension the spring 30.
, For the purpose of limiting rotation of the
shaft ,25 to a predetermined range which em
braces. all of the desired predetermined settings -
of the rotor shaft 3'ill,;aglost-motion, shaft lock~
ing assembly 22)‘ is provided which is substan
tially similar to each of the two lost-motion
mechanisms provided in each of the control units
22. In ‘brief, this locking assembly comprises a
stationary member 2'39‘ within which a stepped
portion of the clamping member '68 is journaled
shaft ZI- in driving relationship with the actu
ating members 23 and 24 of any one of the con
trol units 2,211. to We inclusive, these units are
respectively provided with individual connector
assemblies. Thus the control unit 22a is pro
vided with a connector assembly which comprises
a pinion 37a mounted for rotation with the shaft
21 and meshing with an idler pinion 38a. This
idler pinion is rotatablysupported by means of a
pivot pin 42o. upon a two piece rocker arm 39a
which is loosely mounted upon the shaft .21. It
is adapted for meshing engagement with the
pinion 4.5a, but the ‘arm 39¢ is normally re
strained by a biasing spring 43a to a position
between the ‘two parts, and a detent ring 51]‘
which is rigidly mounted upon a second stepped 40 in engagement witha stop bar 6, such that. the
two identi?ed pinions .are disengaged. » More
portion of the clamping member 68 to retain
speci?cally, the spring 43s is tensioned between
the member 23f upon the clamping ~member.
one end 4la ofthe arm 39a" and a tie bar which
The member 23]‘ rotatably supports two sets of
extends transversely between the two support
lost-motion pinions which are exact duplicates
ing members .64 and 65. At its opposite end, the
of that shown in Figs. 5 and 7 of the drawings.
rocker arm 39a is provided with an armature
As shown in Figs. 2 and 9, the ?rst set of lost
piece 40a which is adapted to be attracted into
motion pinions comprises a pinion 41]‘, a stop
engagement with the projecting core and of an
part-55f having a locking tooth 54;‘ at the pe
electromagnet 44a, thereby to move the idler
riphery thereof, an axis pin 49]‘ and a star wheel
48)’ arranged to coact ‘with the’ detent ring 51]‘. , pinion 3.8a, into meshing engagement with the
pinion 45a. .The electromagnets 44, individual
These four connected parts are arranged to be
to the various control units,“ are all bolted or
rotated relative to-the member 23f as a unit and
so that relative rotary movement may‘ occur
are actuated through engagement of the teeth
of the pinion 41)‘ with a single tooth 60f pro; '
otherwise rigidly secured to a crossbar which
vided at the periphery of the clamping mem- .
extends transversely between and is anchored
at its end to the two supporting members 64
ber 168. The pinion 41f meshes with a pinion
and 65.
.
' 5H having a lesser number of teeth which is
More speci?cally, the armature piece Mia is
pivotally supported by an axis pin 52]‘. This pin
pivotally supported by means of an axis pin 5:; .
upon the lower end of the arm 38a. It includes
also rotatably supports a stop part 55]‘ which is
rotatable with the pinion SH and carries a blank (50 a catch portion 2a .which is normally biased to
engage a catchbar 4 by means of a coil spring
double tooth 53)‘ arranged for engagement with
3a, connected between the two parts 39a and
the tooth 54)‘. The second set of lost-motion
40a, Coacting stop means la are also provided
pinions, i. e. that comprising the seven parts 41)“,
to furnish a force transmitting connection be
48f, 49f’, 51f’, 52;", 551" and 56]" is of identical
tween the two ‘parts 39a and 400. when the mag
arrangement, and is also actuated by the tooth
net Ma is energized. Two stop bars 4 and 5
60f . of the clamping member .68. _ With the
are common to the several connector assemblies
above-described‘ arrangement of the looking as
and extend transversely between the two sup
sembly 22f, the shaft 25 can only be rotated in
porting members 54' and Y65.
one direction until a locking connection is estab
With the ‘above-described connector arrange
lished between this shaft and the stationary
ment, the catch portion 2a of the armature piece
member 23]‘ through the parts of the pinion set
Mia normally engages the catch bar 4, to lock
which'comprises the pinion 41]‘, for example. In
an entirely similar manner, the shaft 25 can only
the arm 39a in a position such that the gear
be rotated in the reverse direction until a look
38a is prevented from engaging the gear 45a.
ing connection is established‘ between. this shaft
Thus during rotation .of the shaftv 2|, the two
2,411,618
11
gears 38a and 45a. are positively locked against
engagement when the magnet 44a is deenergized.
This locking connection is important since the
shaft 2| is rotated in a direction to pivot the
arm 39a toward the gear 45a and hence if the
friction between the identi?ed shaft and arm
should become sufficiently great, through an ac
cumulation of dirt between the engaging sur
faces thereof, inadvertent engagement of the
12
lectively energizing the magnets 44. In order se
lectively to control the energization of the motor
10 and the magnets 44, switching equipment is
provided which includes the three contact springs
of the centrifugally actuated spring assembly 9,
push button switches 86 individual to the vari
ous control units, and the locking contact springs
81 individually controlled by the magnets 44.
In considering the operation of the above-de
10 scribed control apparatus, it may be‘ assumed that
this apparatus is to be utilized to rotate the rotor
two gears 38a and 45a could be produced in the
absence of the locking connection.
shaft 3! to the particular setting corresponding
When the magnet 44a is energized, the arma
to the control unit 22a, thereby to tune the
ture piece 40a is ?rst pivoted about its axis pin
receiver for the reception of a signal or signals
5a, to disengage the catch portion 2a thereof
from the catch bar 4. During continued rota 15 radiated at the particular carrier frequency to
which the control unit 22a corresponds. In order
tion of the armature piece, the stops la are en
to initiate the operation of this control unit, the
gaged, following which the arm 39a is pivoted
push button switch 86a is actuated to its closed
against the bias of the spring 43 to bring the
circuit position, thereby to complete a circuit for
gear 380, into engagement with the gear 450.,
energizing the connector magnet 44a individual
thereby to establish a connection for driving the
to the control unit ‘22a in series with the driving
parts of the control unit 22a.
motor Hi. When energized in this circuit, the
The motor I0 is of the unidirectional type and
magnet 44a attracts its associated armature piece
is arranged so that its rotor is rotated to drive
40a, whereby the rocker arm 39a is pivoted about
the shaft 2i in a clockwise direction as viewed in
Fig, 5 of the drawings. With the shaft 2| rotat- - > the shaft 2| against the bias of the retracting
spring 43a to move the idler pinion 38a into mesh
ing in this direction, the idler pinions 38 are
ing engagement with the pinion 45a. In at
rotated in a counterclockwise direction. Accord
tracting its armature piece 40a, the magnet 44a
ingly, when any selected idler pinion 38 is actu
also closes the contacts 81a to prepare a circuit
ated into meshing engagement with its associ
for holding the magnet 44a and the motor [0
cated pinion 45, the meshing engagement be
energized after the nonlocking push button 86a
tween the two named parts produces a force
is released. When the two pinions 38a and 45a
which tends to pull the idler pinion 38 into
are engaged, a driving connection is established
meshing engagement with the associated pinion
between the motor l0 and the actuating members
45. Thus the two pinions are locked in mesh dur
23a and 24a of the control unit 22a. This con
ing the tuning operation. The mechanical pres-,
sure urging the armature piece 40 of the rocker
arm in the selected unit toward the magnet core
of the magnet in this unit occurs concurrently
with the electrical attraction of the armature
nection comprises the shaft I I, the slip clutch be
tween this shaft and the gear H, the gears I2, l4,
I5, I‘! and I9, and the yielding spring member
28b which connects the gear l9 andthe shaft 2|
piece by the core, whereby the magnet is aided 40 through the hub ISa. Assuming that the shaft
2 l, as viewed in Fig, 5 of the drawings, is rotated
in operating the movable parts of the clutch as
in a clockwise direction through this driving con
sembled. The magnets 44, therefore, need only
nection, the two pinions 45a and 46a are respec
be large enough to attract their associated ar
tively rotated in clockwise and counterclockwise
mature pieces into engagement with the cores
directions. Accordingly, the actuating member
provided therein. This utilization of the me
chanical reaction between any one of the pin
23a is rotated in a counterclockwise direction, as
viewed in Fig. 5 of the drawings. The actuat—
ions 38 and its associated pinion 45 provides for
ing member 24a on the other hand, is driven in
the use of relatively small magnets 44, since each
the reverse direction by the pinion 46a, 1. e., a
magnet merely functions to initially engage the
two associated pinions 38 and 45; the pull of 60 clockwise direction, as viewed in Fig. 5 of the
drawings. During each revolution of the actu
the pinion 38 into meshing engagement with the
ating member 23a about the hub 59a, the two pin
associated pinion 45 being sufficient to maintain
ions 4‘Ia and 5la are pivoted through fractions
the geared or interlocked engagement between
of a revolution relative to the actuating member.
the two elements so long as the shaft 2| is rotat
Thus each time the actuating member 23a_ is ro
ing. The spring member 201) through which
tated to a position wherein one of the teeth of
the shaft 2| is driven by the motor In insures
pinion 41a engages a single tooth 60a of the hub
positive disengagement of the idler pinion 38
59a a driving connection is established for rotat
in any actuated connector assembly when the
electromagnet 44 of the assembly is deenergized
ing the pinion 4'la,‘the shaft 49a and the star
upon completion of a tuning operation. As best 60 wheel 48a relative to the actuating member 23a.
As previously indicated, such engagement occurs
shown in Fig. 1 of the drawings, each magnet
when one of the points of the star wheel 48a
structure 44 also includes a pair of contact springs
coincides with the depression 58a in the ring
81a which are normally disengaged, are insulated
51a. Accordingly, the star wheel 48a is pre
from each other, and are adapted to be moved
vented from locking the pinion 41a and hence
into engagement when the associated armature
the actuating member 23a against rotation. As
piece 40a is attracted to the core of the associated
the three connected parts, 41a, 49a and 48a are
magnet 44.
rotated relative to the actuating member 23a,
For the purpose of energizing the motor l0
the tooth 60a passes out of engagement with
and selectively controlling the energization of the
the engaged-tooth of the pinion 41a and the
magnets 44 individual to the several control units
star wheel 48a is rotated to a position wherein
22a to 22c inclusive, the control circuit illus
the concave surface thereof which next follows
trated in Fig. 8 of the drawings may be employed.
the star point engaged with the depression 58a is
Brie?y considered, this circuit comprises a suit
slidably engaged with the periphery of the ring
able source of current 85 from which current is
570- Incident t0 the described part revolution
derived for energizing the motor l8: and for se—
2,411,618
of the pinion 41a relative to the actuatingmem
ber 23a, the'pinion 5la islikewise rotated through
.a corresponding fraction of a; revolution relative
to
this
member.
1
-
‘
'
14
teeth 53a and 53a’, a locking connection is obvi
ousl'y established which prevents continued rota
tion of the actuating members 23a and 24a, the
lost-motion parts associated with these two ac
‘
Rotation of the actuating member 2311 about
parts 41a, 5m, 55a, and 56a occupy angular posi
tuating members; the pinions 45a, 46a, 38a and
31a, and the shaft 2 I. Thus the entire gear train
extending back to the motor drive shaft His
tions wherein'the tooth 54a engages the blanked
locked up when the rotary control shaft 25 is
the hub 59a continues until such time as the ‘
rotated to the predetermined setting correspond
double tooth 53a. 3 As will be evident from the
above explanation, depending upon‘ the initial 10 ing to the actuated control unit 22a. After this
setting of the lost-motion mechanism associated
train has been locked up, continued rotation of ,
with'the actuating member 723a, a variable num
the motor shaft H is permitted through the
ber of revolutions of this member about the
described slip clutch connection between this
hub 53a will be required before the locking teeth
‘shaft and the :motor drive gear 12. Rotation of
54a and 53a'are moved into engagement; When 15 the rotor shaft 3| and the display gear 33 is
such engagement occurs, adirect mechanical con
nection, which may ‘be utilized either for lock
ing or driving the shaft '25 in ‘the manner ex
also obviously arrested when rotation of the con
trol shaft 25 is stopped. The shaft 25 is stopped
in the particular angular setting to which the
plained below, is provided between the actuat
control unit 22a corresponds and this setting is
ing member 23a and the rotary control shaft 25. 20 identified by the indication displayed by the gear
This connection comprises'the engaged locking
33.
teeth 54a and 5311, the two stop parts 55a and
As indicated above, energization of the elec
‘5611, the meshing teeth of the two pinions 41a
tromagnet 44a and the driving motor I0 is ini
and SM, the single ‘hub tooth ?lla‘and the tooth
tially produced in response to actuation of the
of the‘pinion “or engaged thereby, the hub 5911, 25 push button switch ‘86a, this circuit being com
the clamping connection between this hub and
pleted through the engaged contact springs 9a
the bushing 62a, and the keyv connection com
and 9b of the assembly '9. It is also explained
prising the key 5301. between the bushing 62a and
above that when the magnet 44a attracts its
the shaft 25.
' '
armature piece 40a to initiate operation of the
In a manner entirely similar to thatjust de
scribed, rotation of the actuating member 24a
30 control unit ‘22a, the contact springs 81a are
engaged to prepare a locking circuit for the
in the reverse'direction about the hub 59a is uti
magnet 44a and the motor lll._ As the shaft II,
lized to actuate the lost-motion .parts associated
with this aactuating» member until the locking
teeth- 545;’. and 53a.’ of the two v'stop'parts pro
vided therein are moved into engagement. The
engagement between the identi?ed teeth ‘of these
the gear I2. and the parts of the centrifugal
ing ‘teeth arebrought into engagement. Also,
islcoked up, rotationof the centrifugal switch
when the ‘shaft '25 .is‘ rotated in one ‘direction or
‘the other, the rotor shaft 3'lis rotated in a cor
13 is arrested. When this occurs, the centrifu
gally actuated parts l?b and I 30 are pivotedback
responding direction through the driving con
nection afforded by the" gears ‘25 ‘and 21, the shaft
28, and the gears 29 and 30. The'displ'ay gear
into engagement under the in?uence of ,the
switch l3 are brought up to speed following ener
gizationlof the motor H), the centrifugally actu
ated elements I32) and 13c of the switch I3 are
pivoted away from the axis of rotation of the
shaft. .H to provide a gap between the normally
two stop parts likewise provides a direct drive
mechanical connection between the ‘actuating
engaged faces thereof. As the width of this
40 gap increases with increasing speed of rotation
member 24 and the ‘shaft 25.
’
C
From the above explanation ‘it will be appar
of theshaft H, the conical point of the element
ent'tliat depending upon the initial setting of
l3a enters this gap with the result that the cen
the control unit 22a, the rotary control shaft 25
ter contact spring Bais moved to the right to the
will be rotated in One direction or the other by
dash line position illustrated in Fig. 3 of the
one of the two actuating members 231; or 24a.
drawings. During such movement of the con
Thus, if the tooth 54a of the stop part '55 is
tact spring 911, ‘one of the contacts carried there
by is'moved into engagement with the contact
rotated to engage the blanked double tooth, 53a
of the stop part 56a before the corresponding
carried by the spring 90. Thereafter the en
locking teeth of the two stop parts 55a’ and
gaged contacts carried by the contact springs 9a
56a’ are engaged, the rotary control shaft will 50 and 9b are moved; out of engagement. When
the contact springs 8a and 9c are thus electrical
be rotated in a counterclockwise direction, as
1y engaged, a locking circuit is completed through
viewed in Fig. 5 of the drawings, to the prede
the engaged contacts 81a for sustaining the ener-'
termined setting to which the control'unit 22!;
corresponds. Conversely, if the locking teeth of
gization of the magnet 44a and the motor In, in
the two stop parts 55a’ and 56a’ are moved into
dependently of the position of the push button
engagement before the locking teeth of the two
switch 85a. Thereafter and when the element
stop parts 55a and 56a vare engaged, the rotary
[3h is moved to a position such that the contact
control shaft '25 will be rotated in a clockwise
springs 8a and 9bv are electrically disengaged,
direction as seen in Fig. 5 of the drawings, to
the initial operating circuit for the magnet 44a
the predetermined setting corresponding to the
and the motor Hl is opened.
' control unit 22a. In either case, the rotary cone
After the shafts 25 and 3! have been operated
trol shaft will be rotated at the speed of the ac
tothe'predetermined settings to vwhich the con-'
tuating member 123a or 24a with which it is me
trol unit 22a: corresponds, such that the entire
chanically connected until the nonengaged look
gear train extending back to the motor shaft l'l
'33 is' likewise rotated by the control shaft .25
through the driving-connection provided by the
?gears'126 and 2l,‘the shaft 28 and the ‘gear 32.
Whenboth of the teeth 54a and 5411' are moved
into engagement with their respective associated
springs l3f_and 13g. As'these parts are moved
backto normal, the'conical point of'ther element
l3h is squeezed from between the two parts I36
and 130 with the result that it ‘is moved back to
its normal position. . Incident to this movement
of ‘the element I 3h, the contact-springs 9a and‘ 9c
are electrically disengaged .tolinterrupt the lock!
2,411,618
15’
1.6;
Also incident to the return movement of the con
intermittently rotated relative to the actuating
member 23a in the directions indicated.
Assuming now that the ‘shaft 25 is rotated in
tact actuating element Ith, the contact springs
9a and 9b are again electrically engaged, thereby
to reprepare the parallel circuits for energizing
mined setting corresponding to the control unit
22a, ‘the actuating member 23a of this unit is
ing circuit for the magnet 44a and the motor In.
Thus, these two circuit elements are deenergized.
a clockwise direction away from the predeter
rotated in the same direction due to the engage
any selected one of the magnets 44 in series with
ment of the locking teeth 53a and 54a. Through
the motor H3. From the above explanation it will
the driving connection afforded by the pinions 46a
be understood that only momentary operation of
the nonlocking push button switch 86a is required 10 and 45a, this actuating member rotates the ac
tuating member 24a in a counterclockwisev direc
in order to initiate operation of the control unit
tion relative to the shaft 25. With the two ele
2211 and to insure that this unit will continue to
ments 59a and 24a thus rotating in opposite di
operate until the rotary control shaft 25 and the
rections, the'pinions 41a’ and 5Ia’ are intermit
rotor shaft 3| are rotated to the respective pre
tently rotated relative to the actuating member
determined settings corresponding to the con
24a to produce progressive disengagement of the
trol unit 22a. It will also be understood that
locking teeth carried by the stop parts 55a’ and
when these settings are established, the circuit
55a’. The extent to which these two stop parts
elements 44a and I5‘ are automatically deener
are moved along the free travel range between
gized.
The manner in which the remaining control ' the locking limits therebetween is of course de
termined by the amount of movement required
units 221) to 22c inclusive, may, through selective
to actuate the shaft 25 to its new setting.
actuation of the push button switches 86b, 852,
From the above explanation it will be clear
etc., be actuated for the purpose of driving the
ly apparent that the shaft 25 and the rotor shaft
rotor shaft 3| to its other predetermined settings,
3| actuated thereby may be moved to any de
will be clearly apparent from the above explana
sired setting through operation of a particular
tion with reference to the operation of the con
control unit, without any interference whatever
trol unit 22a. During the above-described rota
from the nonactive control'units. This ».is due
tion of the shaft 25 to drive the rotor shaft 3|
to the fact that during operation of any one of
to the particular setting corresponding to the
the control units to establish the desired setting
control unit 2211, certain of the movable parts of
for the shaft 3|, the parts of the nonactive units
the nonactive control units are also moved to
produce unlocking relative movement between the
locking teeth of the stop parts of one of the lost
motion mechanisms provided in each unit, In
this regard it will be understood that as the shaft .
25 is rotated, all of the hubs 59 individual to the
various control units are rotated therewith. The
action which occurs in the nonactive units will
be more fully apparent from the following ex
are so moved relative to each other as to prevent
a locking connection from being established
through any one of these units. Thus, the two
lost-motion mechanisms as provided in each con
trol unit, permit the shaft 25 to be freely, ac
curately and positively driven in either direction
to any one‘ of the predetermined settings respec
tively corresponding to the several control imits.
As indicated above, the locking assembly 22]‘
planation relating to the movement of the parts
is provided to de?ne the rotational range of the
provided in the control unit 22a when the shaft
rotary control shaft 25 and hence the range of
25 is driven to another predetermined setting by
rotation of the rotor shaft 3|. Thus, as the shaft
another of the control units. Thus, it may be as
25 is continuously rotated in one direction, the
sumed that after the shaft 25 is operated to the
setting corresponding to the control unit 22a, 45 pinions Hi and 5| I supported by the stationary
member 23]‘ are intermittently rotated to actuate
such that the locking teeth 54a and 54a’ respec
the stop parts 55]‘ and 56]‘ until they occupy rela
tively engage the locking teeth 53a and 53a’, the
tive positions such that the locking teeth 54]‘
shaft 25 is rotated in a counterclockwise direc
and 53)‘ are engaged. When this occurs, theshaft
tion, as viewed in Fig. 5 of the drawings, by a
second control unit to a new setting. During 60 25 is obviously locked against further rotation
in the direction'of rotation utilized to effect en
such rotation of the shaft 25, the locking teeth
gagement of the two identi?ed locking teeth.
54a’ and 53a’ remain in engagement to prevent
Also during the described rotation of the'shaft
relative movement between the hub 59a, the ac
25, the parts 47f’, 5|,f’-, 55)" and 551" are like
tuating member 24a and the parts of the lost
wise intermittently rotated'relative to the sta
motion mechanism carried by this actuating
tionary member 23)‘ through engagement of the
member. Thus, the actuating member 24a is
single tooth 60f with different ones of the teeth
rotated in a counterclockwise direction, and is
carried by the pinion 41]‘. Before the locking
rendered operative to drive the actuating member
teeth 54]" and 53)" can be moved into engage
23a in a clockwise direction through the driving
ment, however, the locking teeth carried by the
connection afforded by the meshing pinions 46a
stop parts 55f and 56f>are engaged to stop rota
and 45a. The relative movement thus produced
tion of the shaft. In a similar manner, when the
between the actuating member 23a and the hub
shaft 25 is rotated in the reverse direction, the
59a by rotating these two elements in opposite
stop parts as actuated in response to alternate
directions causes the pinions 41a and 5| (1 and
engagement of the pinions 41]‘ and 47]" by the
the stop parts 55a and 56a. to be rotated in direc
tooth ‘60f, are concurrently actuated toward lock
tions such that the locking teeth 54a and 53a
ing positions. In this case, the locking teeth 54f’
are disengaged. Thus, during each revolution of
and 53f’ are engaged to arrest the rotation of
relative movement between the two parts 59a and
the shaft 25 before the locking teeth of the two
23a, the pinion 41a is rotated through an angle 70 other stop parts are engaged. Thus it will be ap
of 60 degrees in a clockwise direction relative
parent that the two pinion sets as provided in
to the actuating member 23a and the pinion 5|a
the control unit 22f, function to limit rotation
is rotated through a corresponding angle in the
of the shaft 25 to a predetermined rotational
range. Obviously, this range may be shifted at
reverse direction. The teeth 53a and 54a are
progressively disengaged as the'two-pinions are 75 will by unlocking the member 23f, rotating this
2,411,613
11
18
member, the ‘clamping member can and the shaft
relative-to the rotary central shaft 25, such that
2-5 in-uiiis'ciin; and then reestablishing the locking
connection between the "member '23)‘ and the'sup
subsequently locked togetl‘ieri the control'unit
pbi'tiiig member"I54;~
‘
when the shaft and the nub 59 of the unit are
can» thereafter oniy rotate the rotary control
.
order ‘to adjust the ‘various control units
relative to the rotaiycehtim shaft 25, thereby
shaft to the particular setting whicn it occupies
when’ the locking operation is completed. The
tepreviae for oiie'ration of this shaft and the
above-described procedure, ii.~ e; that of utilizing
shaft 3| to the iie'si-red predetermined. settings by
these units,
shaft 151) is pulled out‘ against
is'
direction
‘new r'etated
which to
would
drive
back
the this
traveling
nut away
nut from‘
in
the ‘clamping washer 7'! but-for the freedom of
movement ‘of the shaft 25 arid the clamping mem
be'i? 58; Rotation of the identi?ed parts is cone
t'liefshai‘t is manually to rotate the-rotary control
shaft-25 and the rater shaft in to di-ii'erent- desired
settings, may be repeated for‘ eacn‘oi the other‘
control‘ units‘ in v‘order to'establ-isn the-other de-j
si're'd predetermined setting-s for the two named~
shafts.’ During?‘ each setting operation,‘ the con-‘
trol units which are not being adjusted are main;
taine'ol in ‘adjustment because of the fact that
the frictional engagement of their hubs-59 with
the spring washers ‘I2 is su?icient to maintain
tinned until one limit er the‘ rotational range
the established positions of these hubs relative,
of the shaft 25 a's?é?i'ied through the? action ‘of
the locking assembly vZ27‘ is reached in the man
ner just explained. when this occurs, the clamp;
have beena'djusted, the shaft 15 is rotated to
the 'féféé exerted by‘the"stir-111g‘é 380 until the pine
ion 83 carried thereby engages vthe toothed pee
ri?héry 6f the traveling-nut 169; The shaft 75?)‘
ing'in'e‘mber 68 and theshaft/ZS are locked against
farther rotation. Accordingly, ifvr‘otat-ion of the
shaft T5 is continued- in the same direction, the
to thes'naft 25. when all of the control 'units"2--2
drive the traveling nut v'69 in a direction which
‘would bring the balls 7H) back into clamping eh-e
gagement with the clamping washer ~Ii but'fo'r
ap’p ~ ed airi‘ally' of the'shaft- "25 against the hubs
the frictional engagement between this nut and
‘ therclamping member 68,-?and' the consequentr01v
tation ‘of theshaft 25‘ vand the clamping member
68 with the ‘traveling hut. Rotation oi‘ the three
59¥of the sever-a1 cent-rel uni-ts. Rotation-0f the
identi?ed parts continues until arrested through
traveling
~69 ie1ative to the clamping mem
ber 68 is continued until the left ‘side surface
the action of the stop‘ assembly '22’! in the inaniier
‘traveling
69 is backed ‘away from thevlock
in'gi washer‘ 1| to remove the clamping pressure
explained above. When the shaft 25 and the’
there‘ofli'sl brought iiito tight clamping engage
clamping member '88- are' thus locked against fur:
merit with‘ the ‘opiies‘ed surface of the clamping
member; thereby to previdea friction drive be
the rotation, eta-tinned rotation or the shaft
7-5 serves to rotate the traveling nut'?e relative‘ to
the ‘clamping member as in a direction such- that
tween these we parts which may be utilized in
rotating the parts 69, 68 and 25 in the reverse
the threaded engagement between the parts‘ '
direction. At this point it is noted that the
amount
niover’r'ient' of the traveling nut 69 re
causes the‘ traveling nut and the clamping wash;
quiree; t‘e- ‘e?é‘ct the described clamping engage-'
in
between this nut and the clamping member
68 17s l’nsd?ie'i'e‘nt t0 perm-it; the antifri'ction balls
‘HI i‘rdin» dioepihe ‘out-‘of the ban race in which
they are disposed; Also; the‘ spring washers 7T2‘
engage the steeped ‘hubs "5a with sli?icient pres
tdpreventthe h s'fror'ny being rotated 'rela:
tive‘ toth‘eirsupimrt; gbushinggBZ during ro
' " o’f the-shaft 155* to‘ drive the‘ rotary control‘
5’.
er
th
'
“
‘
'
start ‘it ‘has ‘been rotated to‘ release
:5‘9‘for'niovement‘ relative" to‘ their re‘
sléie'cti' esuliiportih’g bilshi'iigs‘? and. to produce
clamp
engag'em fit between the two parts68
and 6
this 'sha/f-‘vinay be reversely rotated ,for
,
eseoi ciriv-ingthejrdtary cent-rel" shaft 25
e'r H to~ be" moved axially‘ of the shaft 25 until a;
clamping- pressure is again exerted against the
stacked hubs 59; When ‘this-clamping pressure ,
40 is restored, the hubs 59 are ‘positively locked to
thesh'aft. 2'5 to prevent relative rotation th'ereb‘e'e
tween: Thus; the adjusting-operations are com-‘
pleted.
1
_
I
Referring hewmore‘particuiarly to Figs. 1c and
11hr the drawings; thei-inodi?ed embodiment of
the“control"unit.22lthere-i1lustrate'd may be di-f
re'ctiy substituted foirithe control units described
abeve'and' utilized-in the ‘apparatus shown in Figs;
1- :and 2 ‘of_ th th"av'vn‘i'gfs.v In brief, this modi?ed
control unit? e'em'p'nsesa hub HIZ having stepped
surfaces'u‘po'n which thiee'two actuating members
mo and mi are to‘ tablv supportem At the out-'
er sides or the aetuati'ng ‘members I00 and IiIiIi
tbe' connected rot'or shaftj'l "of the tuning
and at the‘ extreme ends of tlfl’e?hllb I 02, gears‘;
stethepartieaiar settings ‘at which the de 65 I08 and 108" are seated‘ 'upb'n- additional" stepped
or signal chanhel‘ ‘isjtun'ed'in by the
te _ receiver. ,Whilejthe-jshafts' 311 and. 25
_
‘in these settings‘ by manually restraine
the shaft T51 against rotation, th'ej'switch :85‘
asseci‘atecl’with the-particular controlunit which
fs-td be utilized‘ incperating'the' rotary control
shaft t’ eihahuanygejstahiished setting, is op:
eifated‘ to" energize theijdiivihg meter m ‘and the
"
‘
"
t‘ M’ ofthe'fj'select'e’d control‘ unit.‘
is thus rendered‘ ‘o-?erativ'e' to" drive
parts‘ \ he s‘elje'cted control‘ unit uh;
are" lo‘ckii'igl'jf v‘ng’ag'edl'in the man;
aheve; D'ui" 'g‘th'e' ?nal portion
" ‘
"
'edcontrol' unit and,’
asking ?ngers 54 and
ssre'i eHe-hrithetiVeIostZ-m o't‘ion mechanisms pro
vided? in‘- tthe unit; are eh’g“ 'ev the-huh? 591 is -ro-'
tatfed: relative-“ta the ‘shaft?
‘rid the ‘b'us‘hingit'i
the‘sele'ctédficontrol unit’ isi'ia'ctua‘ted' te a position?
actuating members" fed an » HJI upon the hearihg
surfaces or ‘this hub.‘ _T_e’y respective-1y‘ mesh"
With"gears NH and‘ Iii?’ disposed upon the‘ outer
sides ‘of the two actuating members I05] and‘ “H:
and» mounted for‘ reta‘tioh wit ' ' ins J04 ‘and ‘ I 0}?
which are journaled withi "-ppemh‘g's through the"
respee'tiveasso 'a‘ted’ actuating’members; I I At‘ the
inner‘ ‘sid
‘
i ‘the two act atin'g members, the‘ '
_
'
pins: mean _*I or": are, espectively, provided, with‘
Stop’pai‘tsliri7 drihiofjiihg's Iii’a‘ahd I03’ hav‘:
irigY‘té‘étIi-FIBB d- Hi5" around the respective pe
rihherie‘s‘ther ‘which are adapted‘ to ‘be moved
'ioekihg" ehgagerheht with a singlelockingr
- teeth‘- ‘Icciréiiheii ihte'sraiwiththe hub I02 inter:
mediate 'tThe't‘wqaetuatihg members I 00] and‘ [0.1.
' Mare
'
/
v ciiic‘allir'; the" three connected parts "13,
I-gm'v and} H11 are rotated as unit ‘reia'ti‘ve tie théj
actuating member (00" in response to rotation of
2,411,618.
19.
this member about the hub I02. Similarly, the
three connected parts I03’, I04’ and I01’ are ro
tated as a unit relative to the actuating member
I0l in response to rotation of this member about
the hub I02. It will be understood, therefore,
that by providing the gear [01' with a different
number of teeth than the gear I03 such that the
a low drive ratio to be used between the rotary
control shaft 25 and the settable rotor shaft3l.
More speci?cally, the accuracy'with which the
tuning shaft 3I may be set and reset to the differ
ent predetermined settings depends upon two
factors, viz.: the precision of thecontrol units and
the ratio of the reduction gearing between the
first mentioned gear is rotated through more
than one revolution relative to the_ actuating
shaft :25 and the shaft 3|. In the illustrated ar
the actuating member I00 about the hub I02 will
berequlred in order to rotate the stop part I03
errors present in setting the shaft 25 to the de
rangements, the control units, with their, many
member Ito during each revolution of this mem 10 revolutions of free travel, provide for great pre
cision in the setting of the shaft 25. Any minor
ber about the hub “32, “several revolutions of
sired angular settings are proportionately re
duced by the reduction gearing between this shaft
and Hit are engaged, to a position wherein these 15 and the shaft 3i. Further, the provision of the
detent rings and star wheel assembly in each lost
teeth are reengaged. Thus, if the gear I08 is
from oneposition wherein the locking teeth I05
provided with thirty-?ve teeth and the, smaller
gear It? is provided with twenty-six teeth, twen
motion mechanism insures a positive and accu
order to rotate the stop part I03 from one setting
sides of the vassociated actuating member thesize
and particularly the thickness, of each control
rately controlled drive of the locking teeth of the
mechanism. Also, by arranging different parts
ty-?ve and a fraction turns of the actuating
member I00 about the hub I02 are required in 20 of each lost-motion mechanism upon the two
wherein the teeth I05 and I00 are engaged to a
sec'ondsetting wherein the teeth are reengaged.
This represents the free travel range of the ac
tuating member I070 relative to the hub I02 and a 25
unit is minimized. The ruggedness of each con-_
trol unit structure is apparent when it is noted
that all of the engaged teeth through which a
looking‘ or driving connection is established be
tween one of the actuating members and the ro-,
?xedly mounted. In a similar manner, the dif
tary control shaft are short and heavy, such that
fer'ence between the number of teeth with. which
the established connection is exceedingly power
the gear I08’ is provided and the number of teeth
of the gear I07’ determines the free travel range 30 ful.
While one embodiment of the invention has
of the actuating member IOI relative to the hub
been disclosed, it will bev understood that‘ various
I02. Also, and as will be apparent from the
modi?cations may be made therein, which are
foregoing description of the apparatus shown in
within the true spirit and scope of the invention.
Fig. 2 of the drawings, the actuating members
I claim:
1
,
_
,
I00 "and IOI are arranged for rotation in opposite 85
rotary controlshaft upon which this hub may be
directions during operation of the control unit to
i. In a radio receiver which includes a rotary
control shaft operative to drive the tuning ele
ment of the receiver in either of two directions;
a pair of members rotatably supported upon said
will be understood, therefore, that in utilizing
this unit to rotate the control shaft in one direc 40 shaft, a pair of lost-motion mechanisms, one of
said mechanisms including parts rotatably sup
tion to the predetermined setting, a direct drive
ported upon one of said members and disposed
connection is provided between the actuating
upon opposite sides of said one member, the other
member I00 and the shaft when the stop part
of said mechanisms including parts rotatably
I03 is rotated to a position wherein the locking
tooth I05 thereof engages the locking tooth I06 45 supported upon the other of said members and
including parts disposed upon opposite sides of
of the hub I02. It will also be apparent that
said other member,‘ actuating means including
when thereafter the stop part I03’ is rotated to
one of said mechanisms for operating said shaft
a setting wherein the locking tooth I05’ also en
to a predetermined setting from one direction, ac
gages the tooth IE6, the entire control unit will
be locked up to prevent further rotation of the 50 tuating means including the other of said mecha
nisms for operating said shaft to said predeter
rotary control shaft. If it is necessary to rotate
mined setting from the opposite direction, and
this shaft in the reverse direction to the prede
means responsiveto the conjoint operation of
termined setting to which the control unit 22 cor
both of said actuating means for arresting the
responds, the drive connection will ?rst be es
tablished through engagement of the tooth I05’ 55 movement of said shaft when it is operated to
said predetermined setting from either direction.
with the tooth I05, following which the locking
2. In control apparatus which includes a rotary
connection will be established through engage
‘ control shaft operative to drive asettable element
ment of the locking tooth I05 with the tooth I06.
in either of two directions; a disk-like member
Aside from the differences just pointed out, the
control unit 22 as shown in Figs. 10 and 11 of the 60 rotatably supported upon said shaft, a lost-mo
tion me'chanismincluding parts rotatably sup
drawings, functions in exactly the same manner
ported upon said 'member and disposed. upon
as the control unit 22a illustrated in Figs. 2, 5,
either side of said member, means including said
6 and 7 of the drawings.
mechanism for operating said shaft to drive said
From the preceding explanation it will be un
derstood that the overall arrangement ,of the 65 settable element to a predetermined setting from
one direction, means for operating said shaft to
disclosed control apparatus is such that extreme
drive said settable element to said predetermined
ly accurate positioning ‘of the settable rotor shaft
setting from the other direction, and means in
3I in any one of a number of predetermined set
tings may be automatically obtained in a thor
cluding saidfmechanism ‘for arresting the oper
oughly reliable manner without the use of ex-' 70 ation of said shaft when it is operated to said
predetermined setting from'said other direction.
pensive or delicate parts and withoutan undue
'3fIn control apparatus which includes a ro
amount of bulk and weight. Thus accuracy of
tary control shaft operative to drive a 'settable
the setting operations‘ is insured by the wide
element in either of. two directions; a diskrlike'
range of free travel which is provided in the lost
motion mechanisms of the control units to permit 75 member rotatably supported upon said shaft, a
move a rotary control shaft upon which the hub
I02 is mounted to a predetermined setting. It
211
r
’
lost-motion mechanism including‘ parts rotatably
22
‘disposed upon either side of said one member,
supported upon said member and disposed upon
and 'means'?xedly mounted upon the other of
either side thereof, said mechanism-also includ
ing parts rotatable with said shaft and‘ disposed
upon either side of said member to coact with said
said members on either side of said ‘one mem
her for actuating said parts in response to rela
tivev rotary movementbetween said members, and
?rst-named parts, means including said‘mecha
means" controlled by'at ‘least a portion of said
nism for operating said shaft to drive said'set
tableelement to a predetermined setting from
one ‘direction, means for operating said shaft to
drive said settable-element to'said predetermined
setting from ‘the other direction, and means ' in
cluding said mechanism for arresting the opera
tionof said shaft when it is operated to's'aid pre
determined setting from said'other direction. '
-~4. in control apparatus which includes a ro
tary‘ control shaft operative to vdrive a settable
a parts ‘for establishing a force transmitting con
nection-between said members after said parts
havebeen actuated to predetermined relative
10
positions}
~
'
3
-
5'8; ‘In control apparatus which'includes a ro
tary control shaft and a disk-like actuating mem
ber'rotatably supported upon said shaft; lost
motion'means for establishing a looking or driv
15 ing: connection between said member, and said
element in eithergof two‘ directions; a control
shaft which comprises a stop element rotatably
'supportediwithin an opening through said actu
‘unit including a disk-like member rotatably sup
ported upon said shaft and a lost-motion mecha
ating member and provided with parts disposed
said member and disposed upon either side of
said'member, means including said mechanism
member for coacting with the adjacent one'of
said parts to rotate said stop element relative'to
said actuating member in response to rotation of
said actuating member about said shaft,- ‘and
upon either-side of said‘actuating member, means ~
nism including parts rotatably supported upon v20 carried by said shaft to one side of said actuating '
for operating said shaft to a predetermined set
ting from one direction and'for permitting said
shaft to be-mo'ved away from said predetermined
locking meansengagedin response to rotation of
said stop element to a predetermined position vfor
settingh'by othermeans; means for operating said
shaft to said predetermined setting from the op‘
lposite direction, ‘ arid’ineahs including
establishing a direct ‘mechanical connection be
tween said actuating member and said shaft. ‘ V’
, 9.‘ In control apparatus which includes a pair
said
‘mechanism for arresting the operation of said
‘shaft when it is operated to said predetermined
setting from said other direction by said last
‘named means.
of relatively rotatable members; means for estab
li'shinga force transmitting connection between
said members which comprises a pair of meshing
pinions supported upon one of saidmembers for
'
'5. In control apparatus which ‘includes a ro-' '
taryw control shaft operative to drivea settable
rotary movement relative thereto and having un
like‘ numbers of teeth, means carried by the other
element in either of two directions; a control unit
including a disk-like member rotatably supported
jupon said-shaft and a lost-motion mechanism
' through a predetermined fraction, of a revolution
member and disposed upon either‘ sidethereof,
said ‘mechanism including additional parts-ro
relative to said o-nemember during each revolu
'tionrofe relative movement between said members,
40 andfcoacting stop ‘means rotated with said pinion-s
tatable with ~sai'd'shaft and ‘disposed ‘upon op
' for locking said pinions against relative rotation
including parts rotatabiy supported upon" said
of said members for rotating one of said pinions
posite sides of said membervto coactj with said
?rst-named parts, ,means including "at least a
portion‘ of said- parts for operating said shaft to
atpre’determined setting from one direction and
for permitting said shaft to ‘be moved awayfrom
after, said one pinion has been rotated to a pre
determined position relative to the other of said
pinions;
7 ‘6.
v
'
,
‘
j
from either'of two, directions and to permit other
means to rotate said shaft away from said, pre
vfor operating said shaft to “said predetermined
operation of said shaft when itis operated to said
predetermined setting by said last-named means.
p
a‘ rotary control shaft to apredetermined setting
‘said predetermined setting by other means,v means
setting-from the opposite direction, and‘ ‘means
including said mechanism, for arresting vthe
,
L10. In a control‘unit which is operative to drive
50
control apparatus which includes a, ‘ro
*‘tarycontrol shaft “and a "di'sk-li‘ke’lactua‘ting
member vrotatably ‘supported upon: said", shaft’; ‘
determined’setting vin eitherdirection; lost-mo
tion means for rotating said shaft in one direction
‘and ‘for stopping said shaft when it is rotated to
said predetermined setting from the opposite di
rection which comprises a rotatable actuating
member, a pair of meshing pinion-s supported upon
said ‘member for rotary movement relative there
flostlmotion means [for ‘establishing a "looking ‘or
driving “connection "between: vsaid member ‘and
Wtofa'nd having unlike numbers of teeth, means for
rotating one of‘ said pinions through a predeter
mined fraction‘ of ‘a revolution relative to said
‘member during‘ each revolution of said member,
and 'coactin'g stop‘means ‘controlled by said pin;
member, means carried by .said shaft and coact
ing with at least one of said parts‘ for rotating
saidjaxis means relative to'said member in re
‘nectionrbetweensaid member and said shaft after
said one pinionhas been‘ rotated to a predeter
‘said shaft whichcomprises axis means rotatably
supported within an opening through said'mem- 7
‘her, parts mounted for rotation with-saidjaxis
"means and disposed 'uponop-posite sides of said
sponse to rotation of said member about vsaid 65
shaft, and coacting' stop means; operative to ‘es
ions to‘ establish a direct drive or looking con
minedj'position relative to the other of said
pinions.)
'
»
v
I
I
V
‘
11. In a .control'unit which is operative to drive
‘tablish'a direct mechanical‘ connection between
1 a rotary control ,V'shaft to .a predetermined setting
said member and ‘said shaftwhen :moved‘ to ‘pre
‘from ‘either of two directions and to permit other
means to rotate said shaft away‘from said pre
determined relative positions in responsej‘toz ro
‘_'ta,tion ‘of said axis means relative’toféaid' me ber.
ideterminedgsetting in either direction; the lost
_ ,1 .7; In contro-lj'apparatus which 'indludesfi
‘motion means for rotating said shaft inone direcj
‘of “relatively rotatable members; ”means‘ for. es.
:tion and for stopping said-shaft when it is rotated
'tablishin'g‘ ‘a force transmitting,Iconnectionubie
to said predetermined setting from the opposite
itwéen?said members which“v comprises :partsjro
[directionwhich comprises anactuati-ng member
tat‘a'bly‘ supported’ upon one‘o'f said members ‘and
rotatablysupported uponsaid shaft, a pair of
2,411,618
23
meshing pinions supported upon said member for
rotary movement relative thereto and having un
like numbers of teeth, a member mounted for ro
tation with said shaft and provided with a tooth
which engages different teeth of one of said pin
24
ion ,for establishing a force transmitting connec~
tion between said members after said pinion has
been rotated to a predetermined locking position
relative to said one member.
'
15. In a control unit, a rotary control element,
a disk-like actuating member rotatably supported
ions during successive revolutions of said actuat
upon said element, a pinion rotatably supported
ing member about said shaft, whereby said one
upon said member to one side thereof, means car
pinion is rotated through a predetermined frac
ried by said element for rotating said pinion rela
tion of a revolution relative to said actuating
member during each revolution of said actuating 10 tive to said member in response to rotation of said
member about said element, a star wheel rotat
member about said shaft; and coacting stops car
able with said pinion and disposed upon the op
ried by said pinions to establish a direct drive or
posite'side of said member, means carried by said
locking connection between said actuating mem
element and coacting with said star whee1 for
ber and said shaft after said one pinion has been
rotated to a predetermined position relative to 15 positively limiting the relative rotary movement
between said pinion and said member to a frac
the other of said pinions.
tion of a revolution of said pinion for each revolu
} 12. In a control unit which is operative to drive
tion of said memberaboutsaid element, and stop
a rotary control shaft to a predetermined setting
means controlled by said pinion for establishing
from either of two directions and to permit other
means to rotate said shaft away from said pre '20 a ‘direct drive or locking connection between said
member and said element after said pinion has
been rotated to a predetermined locking position
relative to said member.
16. In a control unit, a rotary control element,
tated to said predetermined setting from the op
posite direction which comprises a rotatable disk 25 an actuating member rotatably supported upon
said element, a pair of meshing pinions rotatably
like actuating member, an element rotatably sup
supported, upon said member and having unlike
ported upon said member to one side thereof,
numbers of teeth, means carried by said element
means for rotating said element relative to said
for rotating one of said pinions in response to
member in response to each revolution of said ac
tuating member, means disposed upon the oppo 30 rotation of said member about said element, a
star‘ wheel rotated in response to rotation of said
site side of said member for positively limiting the
one pinion, means carried by said .element and
relative rotary movement between said element
coacting with said star Wheel for positively limit
and said member to a fraction of a revolution for
ing the relative rotary movement between said
each revolution of said member, and stop means
controlled by said element for establishing a di 35 one pinion and said member to a predetermined
fraction of a revolution of said one'pinion for
rect drive or locking connection between said
each ‘revolution of ‘said member, and coacting
member and said shaft after said element has
stops carried by said pinions to establish a direct
been rotated to a predetermined locking position
determined setting in either direction; lost-m0.
tion means for rotating said shaft in one direc
tion and for stopping said shaft when it is ro
drive or looking connection between said mem
'
13. In a control unit which is operative to drive 40 ber .and said element after said one pinion has
been rotated to a predetermined position relative
a rotary control shaft to a predetermined setting
to the other of said pinions.
from either of two directions and to permit other
17. In control apparatus which includes a ro
means to rotate said shaft away from said pre
tary control shaft and a' disk-like actuating ele
determined setting in either direction; lost-mo
tion means for rotating said shaft in one direc 45 ment rotatably supported upon said shaft; lost
motion meansfor establishing a locking or driv
tion and for stopping said shaft when it is ro
ing. connection between said element and said
tated to said predetermined setting from the op
shaft‘which comprises axis means rotatably sup
posite direction which‘ comprises a rotatable disk
ported within an opening throughsaid element,
like actuating member, an element rotatably sup
portedupon said member, means for rotating said 50 a ?rst gear supported for rotation with said shaft
to one side of said element, a second gear mesh
element relative to said member in response to
ing with said ?rst gear and carried by said axis
each revolution of said actuating member, a star
‘means to rotate said axis means relative to said
whee1 rotatable with said element, means coact
relative to said member.
element in response to rotation of said element
ingwith said star wheel for positivelylimiting
the relative rotary movement between said ele 55 about said shaft, and coacting stop means dis
posed upon the other side of said element and re
ment and said member to a predetermined frac
tion of a revolution for each revolution of said
spectively mounted, for rotation with said axis
.means. and said shaft, said stop means being ef
member, and stop means controlled by said ele
fective to provide a force transmitting connection
ment for establishing a direct drive or looking
connection between said member and said shaft 60 between said element and said shaft after stop
means have been rotated to predetermined rela
after said element has been rotated to a prede
termined locking position relative to said member.
14. In a control unit, a pair of relativelyrotat
able members, a pinion rotatably supported upon
tive positions.
.
18.- In a control unit which is operative to drive
a rotary control shaft toa predetermined setting
one of said members, means carried by the other 65 from either of two directions and to permit other
of said members for rotating said pinion relative
to said one member in response to relative rota
tion between said members, a star Wheel rotatable
with said pinion, means carried by said other
member and coacting with said star wheel‘for
positively limiting the relative rotary movement
between said pinion and said one member‘ to a
fraction of a revolution of said pinion for each
revolution of relative movement between said a
means torota'te said shaft away. from'said pre
determined setting‘ in either direction; lost-mo
tion means for rotating said shaft in one direc
tion a'nd‘for stopping said shaft when'it is rotated
to said predetermined setting from the opposite
:direction which comprises an actuating member
roatably supported'upon said shaft, a ?rst stop
element rotatably supported upon one side of said
member,‘a second stop element rotatable with
members, and stop means controlled by said pin " Isaid shaft-and means disposed upon the opposite
2,411,618
25
26
a disk-like actuating member rotatably supported
side of said member and responsive to rotation of
upon said element, a pair of meshing gears dis
said member about said shaft for rotating said
posed upon one side of said member and having
?rst stop relative to said member and to said sec
ond stop element to provide a force transmitting
unlike numbers of teeth, one of said gears being '
connection between said member and said shaft 5 mounted for rotation with said shaft and the
other being rotatably supported upon said mem
after said stop elements are moved into prede
ber for rotation relative to said member in re
termined relative positions.
sponse to rotation of said member about said
19. In a control unit which is operative to drive
shaft, a ?rst stop tooth disposed upon the oppo
a rotary control shaft to a predetermined setting
site side of said member _and rotatable with said
from either of two directions and to permit other '
other gear, and a second stop tooth carried by
means to rotate said shaft away from said pre
said shaft for engagement by said ?rst stop tooth
determined setting in either direction; lost-mo
to establish a force transmitting connection be
tion means for rotating said shaft in one direc
tween said member and said shaft after said ?rst
tion and for stopping said shaft when it is ro
tated to said predetermined settingfrom the op 15 stop tooth is moved into‘a predetermined look
ing position by said pair of gears.
posite direction which comprises an actuating
21. In combination with rotatable driven
member rotatably supported upon said shaft, a
pair of meshing gears disposed upon one side of
means, rotatable driving means, a lost-motion
mechanism including input and output elements
said member and having unlike numbers of teeth,
one of said gears being ?xedly mounted upon said 20 and means for de?ning a predetermined free
travel range between said elements and for estab
lishing a driving connection between said output
upon said member for rotation relative to said
element and said driven means when one limit of
member in response to rotation of said member
said free travel range is reached, a connector for
about said shaft, a ?rst stop element disposed upon
shaft and the other being rotatably supported
the opposite side of said member and rotatable
establishing a driving connection between said
with said other gear, and a, second stop element
carried by said shaft for engagement by said ?rst
driving means and said input element, a magnet
for actuating said connector, and means for look
stop element to establish a force transmitting con
nection between said member and said shaft after
by said driving means when said magnet, is de
said ?rst stop element is moved into a predeter
mined locking position by said pair of gears.
20. In a control unit, a rotary control element,
ing said connector against inadvertent operation
30 energized, said locking means being released in
response to energization of said magnet.
HAROLD F. ELLIOTI'. '
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