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Патент USA US2406044

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Aug; 2@, 1946.
2 4, 0 60y 4 .4.
3 Sheets-Sheet l
Filed June so, 1944 '
474M155’ 14.
. Augam, 1946-
_ Filed June '30, 194A ‘
-3> Sheets-Sheet 2
lam/H420 F'IQE/NHOLO
852/1459 ,4. yes/vase
7% 4M
Aug. 20, 19456.
'_ 2,4QQ044
Filed June 50', 1944 - I‘
s Sheets-Sheet 3
Q ,
Patented Aug. 20, 1946
James A‘. Spencer, Teaneck, N. J I, and LeonhardF.
Reinhold, Staten Island, N. Y1, assignors to Ra
dio Corporation of America; a corporation ‘of
Application June 30, 1944, Serial‘No. 542,926.
19 Claims.
This invention relates to selecting mechanisms,
suchv as used in» printing telegraph receivers and
the like.
Our invention is directed to certain improve
ments. in selecting mechanisms, such asdisclosed
in our copending application Serial No. 485,186,
the. storage mechanism viewed. as in aninter
mediate stage of, its cyclic operation;
Fig. 3 shows still another front elevation oi-the.
selectingmechanism, with parts represented as
No. 2,375,828, patented May 15, 1945. In the
having actuated selected. ones of thecode rings;
Fig. 4 shows a plan view partly in cross-section,
of the. apparatus, including gears and clutch
members for drivingthe necessary cams andth‘e
invention of that copending application we, pro-2
. rotatable shaft which carries the, exploring me_m_-.
which was ?led April 30, 1943, now U. S. Patent
ber, the section linelbeing indicated by t,—’-4 in
Fig. 1; and
Fig. 5 shows somewhat diagrammatically a
magnetic clutch releasearrangement and -cir-.
cuit therefonlas used to controlacam shaft.
signals and the exploring memberbeing arranged
In order to brie?y survey the mechanism which
to seek an alignment of code notches arranged 15
will hereinafter be described ,infulldetaiLit may
internally. of.the rings. When such alignment
be pointed out thatthe storage mechanism in
of code notches is reached by the exploring mem
cludesa number of signalresponsive magnetsar;
ber,, thelatter acts as a stop to arrest therotation
vided-an .arrangementof internally notched code
rings .in combination with an exploring member
mounted on a rotatable shaft, the code rings be
ing settable in accordance with the received code
of. ‘a shaft on which‘ may be mounted a typewheel
or other device to be selectively oriented.
Among the objec-tsof our invention are the fol
. ranged to release certain triggering levers so that.
at aparticu1ar point in, the ,cycleof operation,
a .cammctuatedmechanism shall selectively actu
ate. different internally notched-4 code rings to ro
1. To provide a selecting. mechanism having
positivelyactuated .settable elements for storing
the e?ects of received code signals.
To provide an improvedmeans in said select
ing, mechanism forsetting up, a. permutational.
arrangementiof internally notched code rings in
tate thecsamethrough asmall, angle. , Upon .re
accordance with a received code signal.
3. To provide improvements in. the design and
operating characteristics of any exploringv arm
which serves to stop the rotationof. a-shaft in a’
selected position of ‘orientation.
4. To, provide improvements in the design of i
an exploring member mounted on ,a rotatable.
shaft, such that after the exploring member has
been engaged with an alignment cf notches in the
associated ; code rings, disengagement. may be
effected without undue friction merely by upset
ting the alignment of code notches upon restora
tion of ‘the code rings to normal position.
Other obiects of ourinvention aswell as ad
vantages,v of ‘the improvements hereinafter de
scribed will ‘appear to those skilled in the art. A .
detailed descriptionof a preferred embodiment
will‘ now be setfor-th; reference being made to the
accompanying drawings. in which:
Fig. 1 shows, a frcntelevation of a. selecting
mechanism_inc1uding signal storage elements,_
cam-driven devices for setting each of a plurality
of internally notched rings according as they‘are
selected‘ by the marking elements of incoming.
leasinga clutch which rotates. the cam shaft, the
selectedpcode rings; are moved-into Position to
set up an alignment of their internal notches.
Thenecessary number of coderings being simul
taneously moved into aselcctedposition, the. ex
ploring arm is released forrotationfromitshom
ingpcsition to whateverposition .is to- .befound.
havingan alignmentof code notches.
The ex
ploringarmis retarded just before being brought
to ‘a, full .stop. Assuming that av typewh'eel is
vmounted on the same shaftvvith, the exploring,
arm, this .typewheel will then beset for printing
a selectedjcharactern After the printing opera,
tion,,the code rings are. restoredto normal, and
this operation. itself. disengages .the exploring arm
forreturn to its homing position. At that point,
it is, again arrested by a stop. member so that its‘
driving clutch must slipvuntil another selective
operation takes place.
Referring now. to Fig. l, weshow oneof the
impulse responsive magnets i having an armature
2. A spring 3 holds the armature'away from the
pole piece of the magnet. A stop member 4 deter
mines the gapbetween the pole piece and the
armature, when the magnet is not, energized.
Mounted .on the armature vmember Z is a button
5 which engages with alug 6 on a tripper mem
her ‘i. Magnets for the different units of uni
form length ,code signals are so arranged as to
code signals, an exploring arm,_and other come
engage .with di?erent onesof a. series of tripper
ponents of a complete selecting mechanism;
members ,1, where all of ‘the latter are mounted,
on one spindle 3 for independent actuation. Ac
‘ Fig.2 showsa-‘fragmentary front‘elevati'on of
cordingly, the tripper members 1 are provided
with a plurality of actuating lugs 6 and 6’, either
selective mechanisms which are under control of
the code signal responsive magnets |. The ?rst
one of the levers l2 to be tripped in response to
the reception of a marking code signal element
of which may be kicked by one of the armatures
2 or 2'. Each tripper member ‘I is held in nor
mal position by a spring 9. A notched lug [0 5 actuates lever l4 so as to cause the release of
on each tripper member '| engages with the end
lever 39 for clockwise rotation through a small
of a settable lever Ii having an upstanding
angle. Lever M has a lug 38 for holding lever
extension | 2 for supporting a thrust bar i3. Each
39 in its normal position. Upon release, how
of the levers II is held in normal position by a
ever, the lever 39 rotating on pivot 40 allows con
spring Ila. An edge surface of each lever ||
tact springs 2| and 22 to be closed. These con
acts as a cam in engagement with a single lever
tacts, as shown in Fig. 5, are in circuit with rings
arm M which is common to all of the storage
and brushes of a rotary distributor.
mechanisms for the different code rings. Lever
The distributor is composed of segmented rings
arm I4 is held in normal position by a spring l5.
all-and 8| and slip rings 82 and 83. Slip ring‘
All of thrust bars l3 are pivotally mounted at
82 receives the code signals and distributes them
|6 on a single cam-actuated lever H, the latter
through the segmented ring 88 to the several
being pivoted at l8 and having an extension arm
magnets |. Slip ring 83 has D. C. potential sup
Ila which carries at its upper end a roller IQ
plied thereto from a local source. Segment 84
for engagement with a cam having a, hump 20
and brush 86 are used to time the actuation of
on its periphery. A spring l'lb causes the roller 20 clutch release magnet 60 when prepared by the
| 9 tobe pressed against the cam. Shaft 23 is
closure of contacts 2| and 22. The distributor
intermittently driven and carries two cams, the
rings, as shown in Fig. 5, are designed for two
channel multiplex operation so that one-half of
humps on which are referenced 20 and 24 respec
tively. Alternatively, the two humps 20 and 24
each ring is assigned to one channel and one
if merged into one hump could be included in 25 printer, while the other half is assigned to a dif
the peripheral surface of a single cam, whereby
ferent channel and printer. The top half of the
levers Hand 26 would be actuated in succession.
developed showing of distributor rings 80 and 82
, The mechanism for driving shaft 23 intermit
is appropriate to the selecting mechanism and
tently through a positive clutch device powered
printer shown in the drawings. The bottom half
_ by a continuously running motor 68' (Fig.4) will 30 of these rings would be serviceable in association
be described in more detail hereinafter. The
with a second selecting mechanism and printer.
actuation of lever I‘! by means of the cam hump
20 causes thrust bars l3 to move to the right
in Fig. 1 and each of the thrust bars which is
permitted to drop down into engagement with a 35
toe-piece 30a on a lever 30 causes selected ones
on their common pivot shaft 3|. The selection
of thrust bars l3 for this operation is provided
speed-reducing gear train 69 which is constantly
driven by the motor 68. Hence, gears 63 and 64
meshing with pinion 62 are constantly driven.
by counter-clockwise rotation of the settable
levers II when released by their associated trip
per members .1. Those of thelevers H which
remain in normal position after reception of a
code signal [continue by means of their exten
sions l2 to support the thrust bars | 3 so that 45
The right-hand extension of each lever 30 has a
rounded end seated in a peripheral notch 32 in
plete code signal combination, segment 84 is lo—
cated in the lower half of the distributor ring 8|.
Segment 85 is reserved for use in association with
a different clutch release magnet (not shown).
A pinion gear 62 is mounted on the shaft of a
of the levers 30 to be rotated counter-clockwise
they ride over the tops of the toe-pieces 30a.
In order to time the operation oftheclutch release
magnet 30 so as to followthe reception of the com
The hub of gear 63 has a ?uted portion 65 which
is positioned in coplanar relation to a pawl 66
pivotally mounted at 67 on a cam member ‘Ill.
The cam member is keyed to the shaft 23. Its pe
riphery contains one step for engagement of a
back-lash pawl ‘H which presses thereagainsi; by
virtue of the tension of a spring 12. Pawl 36 is
urged by a spring 73 to engage with one of the
An assembly of .coaxially disposed code rings 50 ?utes in the hub 65.
27 is positioned and supported by at least three
The brushes 86 and 37 rotate synchronously
posts 28 having spacing members 28a thereon
over the distributor rings and when D. C. poten
for suitable separationand individual holding of
tial is applied to magnet 60 by closure of its cir
the code rings in parallel planes and in coaxial
cuit through the distributor segment 84 and con
alignment. An indexring 29 is also provided, 55 tact segments 2| and 22, the armature BI is at
an associated code ring 21.
this ring being delineated as though broken away
so that only about one-quarter of its full cir
‘ tracted.
This causes the extension arm ~6|a to
be disengaged from a lug on the pawl 36. Spring
13 then moves the pawl into engagement with the
?uted hub 65 and shaft 23 is thereby driven
cumference is shown in Figs. 1 and 3. Each of
the code rings 2'! is rotated clockwise through a
small angle by an individual setting lever 33. The 60 through a single revolution. Upon completing
selective engagement of individual thrust bars l3
this cycle, the magnet 69 has already been de
with the toe-pieces 300: on levers 30 has been
energized so that the extension arm 6| is moved
described above.
back into the path of the lug on pawl 66, thereby
A plurality of detent levers 33 is mounted on
disengaging this pawl from the constantly rotat
a common spindle 34 and each of these levers 65 ing hub 35. The homing position of the cam 10 is
engages with one or the other of two peripheral
thus reached whereat the back-lash pawl ‘|| rides
notches 35 in its associated code ring 21. The
over the step in the cam 10 and locks this cam
rounded end of the detent lever 33 is seated in
in its normal position.
one of these notches or rides over an intervening
During the single revolution of the shaft 23,
hump, exerting pressure thereon which results 70 not only is the lever arm I‘! actuated, but, as a
from the tension of a spring 36.
restoring operation, lever arm 26 is subsequently
A positive clutch is shown in Fig. 5. This
actuated, its roller 25 being caused to ride over
clutch is arranged to rotate shaft 23 intermit
the hump 24 on one of the cams which are
tently for actuating the lever arm I‘! (Fig. 1)
mounted on shaft 23. The function of the lever
after the code signal has been stored by the
arm 26 is to restore the selected code rings to their
initiahpositiom This-=is-accomplished by adown
‘I 4- andzgear :64. :are;.-loosely~ mounted on ‘the- shaft .
52:.- Compressiombetween- the clutch plates 1.4 and
wardemcvement-of rtherfreejend. ofilever 26;; This
free: endofrlevery2‘6;spans>al1.¢of>;the code rings; 21
and: engages; with-i-peripheral [notches -,3l: therein.
This ,restoring;operation.~;takes placeafter the ex->
‘I5 is brought about by means of a helicalspring
‘ll: whiclrisibacked-upby nuts. 18. threaded :on to .
therendgotfth'e shaft‘?z.‘ Ball bearing assemblies’
“l il-sandxl?ware; used as Journals for the shaft .52.
vIt-wi'll be; apparent from the description‘ above
and; from the drawingsthat the shaft 52 isurged
by‘the ‘friction.’ clutch-mechanism -to:~rotate when
ever:releaseohby:start-stopslever 5Q: ‘The-shaft:
ploring arm d9 has been rotatedtovits, Selected
position.- as determined byan alignment of code
notches .in-the rCOdE: rings 29; and as. will. here
Operation of-the selecting mechanism
52 may. also be :arrested in any given selected. po
sitionupon actuationv ot the exploring arm 49 now
to: be described.
, ,I-Iaving, in .mind :that the selecting mechanism
is designed to set. up .a.§perm,utational arrange
ment of code rings 3‘! so that at some-{point .in
The exploring’; arm
teurnallybf _ the-ring :assernbly ' their code notches
wil-Lbe. brought intoalignment-for arresting the
~In_~;selecting mechanisms-of the ‘prior art where
exploring'arm“ 49,..we shall now describe the suc_
an; exploring arm was ,used; it hasbeen found: that‘
Magnet I, whenitis-energized in response to
theimethodrof arresting-s the exploring armsude
denalya- :Was1 such'ias, ‘to: imposeasevere mechanical 5
strains-yupon the structure ‘and to shortenv the
life of ;the apparatus. Thisvwasdue to. the con-'
siderable weightrofj the exploring, armv andathe»
a .code;signal impulse, attracts its armature 2 and
typewheel-or other/element which wasmounted
cessive- steps in. the-selecting- cycle, reference be
inggmadestoaall of the?g-ures, but especially to
Figs.v 1, 2, and 3 for showingdifferent stages in the ~
selecting cycle.
on a friction driven'shaft such as shait'52-in'Fig;
clockwise .againstxthe tension of spring 9. Lever 355 1. vAccordingly, we have provided a‘means for
retarding 'the exploring, arm-and whatever-gela
ll:isrthereby-disengaged from a notch in the lug
mentsx-are rotatedtherewith on a commonshaft
lillof the-;tripper¢member ‘l. Lever H also rotates
before they are brought to a full stop.
counter-clockwise subject to the-tension of spring
Fig. -l showsuthe exploring arm 49, in-its hom- I
lla-.. The-supportingextension l2 moves to the
rotates its. associated, tripper - member ‘l counter
left andaallowsthrust bar 13 ,to. be dropped into
positionior, engagement with the toe-piece 38a
on'the-coderingactuating lever 30. The signals
stored-bye trippingrtheilevers 12 are thus trans
latedhintosettingmovements of the levers Wand
theecode rings 2]; all; aspreviouslydescribed.
Lever <39-:When=tripped is moved by tension of
springl2l: and-isxstopped by the end‘ of a screw
41; -The_~rnotion;of;lever"~39 is suf?cient, however,
tosclose-ithe contact'points; of springs 2i and 22,
foreactuatingthe clutch release magnet ‘60 in the
ing-gposition from- which; it is released’ for ‘mak
ing;,;a cyclic ‘excursion. Fig. 3 shows the explor
ingggarm was it appears'after being arrested. in
accordance with the position of . alignment of
code notches in the settable code rings 21. The
exploring armqis started -on'~its>excursion by the
actuationof a startlever Ell-at the free end of
which isa lug 56a normally engaging with a pro
jection?l at oneendof .the_ exploring arm ,49.
The start lever. ‘50 is, moved downwardly upon
40 setting the code rings ZLsince a cam follower
rollen'?iib, normally ,seated ,i in the code- Wheel
manner heretofore described.
Fig; 21shows' thepositions occupied by. the sev
notches Z'i'a, isbrought out to themain periphery
eral-portions. of the selecting mechanism after
of ;the code, rings 12,? V and; rests , thereon subject to
storing'the-signal and just prior ‘to the actuating
the tension __of 1 a. spring" 500.
_In.or_d_er t0 prcsentaniedgewise viewin Fig. 4
of the .exploringarrn VM and to clearly depict the
elements,“ carried. thereby, ,it should be assumed
thatgthe exploring armnll?has been rotated until
movement of the code rings in response to the ro- -'1
tation of-the cam shaft 23. This actuating move
ment rotates lever arm l'l counter-clockwise and
causes-thethrustzb-ars.isteither to ‘ride over the
tops ‘01571711811tO8€pieCeS3?lL in which case» there
its _, longitudinal axis. lies 7 along the section linev
Iii-410i Figml; Also,_ in vFigs. land 3, it will be
understoodithat only. the one code ring 21 which
will bernoesetting, of {the associated code rings, or
el_-s_e,;; as: when the. thrust bars l3‘, have been
dreppeds they causecounter-clockwise rotation of
standslimmediately. behind the index. ring 21 is,
theelever members» #30; thus producing clockwise
rotation of :each selected code ring 21.
Thestopsscrew. 4|, beingsmounted- on alng at I
the-endpffleven arm l‘l;~now- pushes against lever
s9-iandp-causesi1the contact springs Zland 22‘ to
be 7 separated; thus opening the circuit of the
clutchmagnet 6Q: The‘lower end of lever 39 now
rides over andis cocked-~by=the lug?? on lever
14.‘; The'extension 4'!‘ on lever l1 frestores levers
Asliding index, rod Ediiscarried by the explor
ing. armv 65in position to be moved longitudinally
with.respectthereto, The ,index rod 54 is held
in place bystraps53 screwed onto the exploring
arm?blg. Spacing bushings 5.3a. (Fig. 4) vsurround
the screwsuoristuds bywhiohthe straps 53v are
secured tothelmemberll?. A spring 55 is at
tachedgatoneuencl .torthe exploring arm 49 and
atthe othenend to an ear-‘piece 56 on the index
I |.{8.-I1d_-;1 :totheir normal positions in which lever
l _I ~iss1atched: :by! the ‘ex-tension .! 0 on lever ‘l.
rod 513.
lligof.frictionfabric. Clutchmember 'l'?-is keyed
At the upper endoi indexhrod 54. (as shown in
Fig. _1),, is, a projection 54541. which is arranged to
seat. itself .in any. one-of the indexing notches
in .thestationary indexringil?, thisring be
ing heldjromyturningby means ofa pin 281!
through, one __of the posts. 28.» The, end Mb‘ of
rod M ‘is suitablyshaped tolactupon
the radia-Ledgesofacam .53 (hereinafter referred
to .the..shaft..52-,.while.clutch member ‘id-is con
to asa .cloverleaf ,. cam). - and,v {after _ rotating. this
v Friction ‘clutch.~ drive for typewheel shaft
The_1shaft;5-2,»;which carries an exploring arm
49 {and -9»2typ6WhBe1> (noteshown) or-other member
to benbrought into any selected position of orien
tatiQn,.-is~dri-ven threugh'friction clutch plates'ili
and-:IEi-between which maybe interposed a- disk “
cameo-that thelintegrallyeformed paddleeblades
stantly driven .byitsassociated gearnilrthis gear
53 drop into ,an alignment- of . code ring. notches. .
meshing . with...pi-nion I 52., at. the; end of -a- shaft,» in .
the. ,speedreducing ..gear (59.. The clutch .lnember
further rotation. .of Ecam-15'!‘reacts upon-‘the.index.v
rod “and against the tension of spring 55 to
retard the shaft 52 until the indexing function
is completed.
The cloverleaf cam 51 is: pivotally mounted at
anism is intended to be incorporated into a con
ventional selector switch, then the wiper arm of
said switch may take the place of the typewheel
and a circuit closure may be made through any
selected contact segment in an arcuate bank of
59. .The four blades 58 of the paddle wheel
device are disposed transversely of the inner edges
of all the code rings 21. The exploring arm 49
such segments.
while rotating to a point where an alignment of
code ring notches is to be found allows the lead
ing one of the paddle wheel blades 58 to graze
the-inner edges of the code rings 21. A rub
not be adhered to,,but that the spirit and scope
of the invention is much broader than merely to
bing pressure is also‘contributed by the action
of spring 55 and the aforementioned cooperation
between the index rod end 54b and the clover
leaf cam 51 so that the latter tends to rotate 15
onits spindle. 59 in a counterclockwise direction.
. _When ablade 58 is engaged by an alignment of
notchesin the code rings 21' the cam member
57 becomes hypocycloidally movable to a selected
It is, of course, to be understood that our inven
tion is capable of modi?cation in various ways and
that the exact features of design of the particu
lar embodiment herein shown and described need
cover this illustrative embodiment.
We claim:
1. Orientation setting mechanism for a rotat?
able shaft, comprising a plurality of internally
notched selector rings each corresponding to an
element of a selective code signal, a motor adapt
ed to run constantly during the operation of said
point‘of arrest. The stiffness of the spring 55 20 mechanism, means for driving selected ones of
is su?'icient to produce a torque‘ slightly less than
said rings from an unselected to a selected posi
the effective torque of the friction clutch 14, 16
tion, said means including transmission gear and
through which shaft 52 is driven.- The clover
a positive clutch driven by said motor, tripping
leaf cam. 51 and the paddle wheel blades 58, there
mechanism for causing the clutch to be engaged
fore, perform the function of retarding the ex
and to rotate through a single cycle, a cam rotat
ploring arm 49 prior to the entry of the index
able with the intermittent element in said clutch,
rod end 54a into the positioning notch 290'. where
a reciprocating device including a plurality of
it is fully stopped.
coaxially pivoted thrust bars and a cam follower
The position of arrest of the exploring arm 49
engaged with said cam, marking-code-signal-re
is shown in Fig. 3, where it appears that the in 30 sponsive storage means for selecting a permuta
dex rod end 54a has been latched into a notch
tional combination of said thrust bars, levers in
29a, and where the index rod end 54b has mount
dividually associated with said thrust bars and in
ed to the outer extremity of a leaf in the cam
dividually engaged with peripheral notches in re
spective ones of said code rings, control mem
The restoring mechanism
bers in said storage means for selecting certain
ones of said thrust bars for simultaneous actua
As heretofore indicated, the restoring move
tion of said levers, an exploring arm mounted on
ment is brought about by control of the restoring
said orientable shaft and arranged to seek and
lever 26 when its cam follower roller 25 rides over
to be arrested by an alignment of code notches
the cam hump 24 rotating on shaft 23. The pe
ripheral notch 31 in each of the code rings 21 40 in said rings, a friction clutch driven by said
motor for urging said orientable shaft to rotate,
is su?iciently wide so that the free end of lever
and a start~stop detent under control of the ac
26 normally occupies the relative position shown
tuated code rings for releasing said exploring
in Fig. 1 with respect to the rings that have not
arm from a homing position, and for arresting
been set, and it occupies the relative position
shown in Fig. 3 with respect to any of the rings 45 the same after it has been arrested at, and been
which have been set. Accordingly, the selected
from, a selected position of orienta
rings are restored to normal by downward pres
2. Orientation setting mechanism in accord
sure applied by the restoring lever 26. This
ance with claim 1 and including a stationary in
movement causes the alignment of code ring
notches to be upset. The engaging paddle wheel 50 dex ring having internal notches, a slideable in—
dex bar mounted on said exploring arm, and
blade 58 is thus lifted out of the code ring notches
and the rotation of the cloverleaf cam 51 causes
the index bar end 54b to ride over the highest
part-of one leaf. Spring 55 immediately con
means for causing one end of said index bar to
be moved radially into engagement with a selected
notch in said index ring for arresting the explor
tracts so as to disengage the index bar end 54a 65 ing arm in a desired position of orientation.
from the notch 29a in which it was latched. The .
exploring arm 49 is now free to rotate in response
to the driving action of the friction clutch mem
bers 14, 15. Thereafter the exploring arm 49
rotates to its homing position where it is again
brought to rest by engagement between the ex
ploring arm projection 5| and the lug 50a on
the start-stop lever 50.
It is within the scope of our invention to uti
3. Orientation setting mechanism in accord
ance with claim 1 and further characterized in
that said levers are formed with toe-pieces dis
posed in the path of selected thrust bars and un
derlying the path of non-selected thrust bars.
4. Mechanism for selectively orienting a rotat
able shaft and for arresting the same in a pre
determined position, comprising an exploring arm
a?ixed to said shaft, a motor and friction clutch
lize its selecting mechanism in any apparatus
which requires selective orientation of the shaft
for causing intermittent rotation of said shaft,
52 and the arrest of that shaft for performing
said exploring arm in a homing position and for
any subsequent operation. It is immaterial,
therefore, whether this shaft carries a typewheel,
releasing the same to be rotated by said friction
clutch, a plurality of internally code-notched se
the contact arm of a rotary switch, or other ele
lecting rings, coaxially pivoted levers having
a release-and-stop detent for normally holding
ment to be oriented. For example, if the shaft
rounded ends individually seated in peripheral
52 carries a typewheel, the associated appara
notches of said rings and comprised in means for ‘
tus would conventionally function to produce a
moving said rings from an unselected to a se-_
stroke of an ordinary printing platen for print
lected position, said means including thrust bars
ing a character. If, howeventhe selecting mech 75 selectively and individually engageable with toe- '
‘selectors at‘ points'determjined‘ by‘ their: permuta
pieces: on isaid’cleve'rsand including a‘ cam-actu
f‘tio'nal"setting‘vvhen ‘operated inv response to'sa'id
“atedl‘ swingwhich ‘provides pivot'ar-support‘com
" men-{to ‘said ‘flevers; ‘si‘gnal "responsive “Storage
‘10; The combination‘according'to' claim: 81 and
‘means 1‘Séllll'allillé to "pl‘é‘détel'mil'le lWhiith "‘Of the
thrust bars shall engage with associated: lever
‘toe-pieces‘ to actuatesa'id‘code rings,’ means car
‘ried'i’by sai'd'l'exploriri’g arm for causing'its'arrest
having a slideable index bar nio'unted'on'said'stop
‘arm, an'inte‘r‘nally notched‘ stationary ‘index ring
“ being‘ provided ‘for locating said selectedv positions
'at‘a'po'sition determined by an alignment of code
‘or-"stoppageartn’e typewheel s‘ha'ftjand one‘e'n’dbf
‘notches'in- said rings, means for causing the set- ,
'sai'dindexbar ‘being’rnovable into an'd'out of en
"gagementjwith‘ the index ring notches under con
ting'and'res'toration of said rings to controlsaid 10
'trol of said h’ypocycloidally movable‘means.
'releas'e-‘and-stop ‘detent, ‘and a positive clutch
driv'én'rb‘y said motor and Controlled by the'tim‘es
orreception or signals to which said storage
‘means is responsive, said ‘positive ‘clutch being
‘ 11. "In mechanism for selecting a position’of ar
rest of‘ a’ rotatable ‘shaft, “a, plurality ‘of internally
notched “selector "rin'gs permutationally operable
‘effective to operate said cam-actuated swingand "
in accordance with received code combinations‘of
impulses, ‘an‘exploring arm'?xe‘d ‘on ‘said'shaft, a
snow-0 c'ausethe ‘restoration of said rings.
"-5. :In'a ‘device of the'cla‘ss described,'a rotat
stationary "index "ring having 'inner peripheral
able shaft, a plurality of selector’disks’ for deter
‘mining'a position ‘of orientation at which said
shaft is ‘to be stopped, means _including an'ex
'plo'ri'ng- arm mounted onrsaid shaft and carrying
a‘ swiveled'seeker which cooperates with said se
lector ‘disks for arresting the rotation of said
notches for locating’ different‘ 'positions'“‘of' stop
‘pag‘e‘c‘f‘ said" exploring arm,'an index bar slide
;ably mounted ‘on "said “arm ‘and having ‘one vend
“movable into "an‘dbut vof 'latohin'geng‘agefnent
with’ any selected one of‘ the'index ring ‘notches,
shaft, 'a'friction clutch through-which Said shaft
ing peripheral ‘cam faces ‘engaging ‘withthe‘other
is power-driven, ‘a latchgmember slidably‘ mount
end or'saidundex 'bar for interaction therebe
twee‘njm‘e‘ans‘ ‘rotatable with said cam for ‘seek
ing an alignment of notches in said selector’rin'gs,
a “cam ' ‘pivoted’ ‘on said "exploring arm ' and hav
ed ‘on's‘aid exploring ar‘m'a'nd cooperating with
said‘seéker, and‘a spring interconnecting said
latch member and‘saide'xploring arm and con
stituting means for causing'the latch member
to~so ‘actuate'said seeker that the‘ rotation speed -
of "said shaft is retarded as it approaches said
position of orientation.
6.‘In a device‘ of the class described; a power
driven friction clutch, a shaft ‘arranged to be in
termi'ttently driven through said clutch, selector
mechanism including a plurality of internally
an‘d‘a "resi1ient "linkage between‘sai'd exploring
'arm'aindsai'd'index bar‘ for resisting the turning
momentum'of 'said'shaft and what it carries, ‘said
. linkage‘bein'g' effective by virtue of the‘ facility of
the'last ‘said means for‘rolling into a ring'notch
alignment, thereby to'actu'ate said cam and index
'IZIIn mechanism for selectively orienting-"a
rotatable‘ shaft, a 'motorldriven friction clutch
notched-‘selector ‘ rings for‘ ‘determining different
forurging' saidsha'ft to rotate'in one direction,
selectedipositio‘ns “at which said'shaft is to be
a stop-arm mounted'on" said shaft, a 'detent op‘e'ré
stopped, a stop arm ?xed‘to'sai‘d'shaft, an in
able‘ to ' h‘old"s'ai'd ‘stop -' arm ‘at ‘a ‘ homing position
dex rod longitudinally slideable with respect to 40 arid‘to'rel'e'as'e "the "same for making ‘a cyclic e'x
said stop‘ar'm'; a'stationa'r'y index ring having in
cursion, a plurality of""int‘ernally notched code,
rings "selectively ‘movable ‘ through "a ‘ limited ‘ are
ternal notcli'eslwith which'said'index rod may be
for determining a position of arrest of said stop
engaged, and a seeker member swiveled on said
arm during an excursion, said code rings being
stop arm, said seeker member having radial blades
for engagement with the selector ring notches 45 constructed and arranged to actuate said detent,
an index bar carried by said stop-arm and mov
and a cloverleaf cam for cooperation with said
able radially in relation thereto, an index ring
index rod.
having its inner periphery notched for engag
'2. The combination as de?ned by claim 6 and
ing said index bar at different selected positions,
including a spring for urging one of ‘the radial
blades of said seeker member to enter a transverse 50 a member pivotally mounted on said stop-arm
and having paddle-wheel blades for effecting en
alignment of notches in said selector rings, which
gagement with an alignment of code notches in
alignment results from the operation of said selec
said code rings, thereby to retard the progress of
tor mechanism, and for causing the withdrawal
said stop-arm, said member also having a cam
of said index rod from a notch in said index ring
upon upsetting the alignment of selector ring 55 portion arranged and adapted to cooperate with
said index bar, and a spring for applying pres
notches, the upset being inherent in the comple
sure between one end of said index bar and the
tion of operation of said selector mechanism.
periphery of said cam.
8. In a printing telegraph receiver, a plurality
13. In a selecting mechanism, a stop-arm
of selectors, means for variably operating said
selectors in accordance with received code com
60 mounted on a shaft to be restrained from rota
binations of impulses, a typewheel shaft subject
tion after selecting one of a plurality of possible
to rotation through a motor-driven friction
clutch, a stop arm carried by said shaft, a start
positions of arrest, power-driven friction clutch
means for urging said shaft to rotate, a detent
operable to release said stop-arm for cyclic rota
stop detent controlled by said selectors for releas
ing and restraining said stop arm, hypocycloidal 65 tion from and to a homing position, a plurality of
1y movable means carried on said stop arm for
internally notched code rings permutationally op
erable to set up an alignment of their code
causing its arrest in a position determined by the
operation of said selectors, and resiliently acting - notches, thereby to select different positions of
arrest of said stop-arm, an index ring having a
means for impeding the rotation of said hypo
cycloidally movable means thereby to retard the 70 notched internal periphery, a radially extend
able index bar carried by said stop-arm, one end
typewheel shaft as it approaches the selected posi
of said index bar being arranged to latch into
tion of stoppage.
any one of the notches in said index ring, and
9. The combination according to claim 8 in
means controlled by the setting of said code rings,
which said hypocycloidally movable means pos
sesses radial blades for engagement with said 75 and carried on said stop-arm in cooperative re
lation to said index bar for causing the motion of
lsaidstopiarm~ to be retarded as it approaches a
‘selected full stop position which is determined
by the entry of said index bar end into a notch
of said index ring.
14. The combination according to claim 13 in
which said means controlled by the setting of said
ing a latch arm in said means for engaging said
‘seeker cam portion,’ and‘ a recessed stationary
member with which said latch arm is engaged
upon outward thrust thereof by‘ said seeker cam
internally notched selector means surrounding
the orbital path of said seeker member, the
gitudinally slidable with respect to said stop arm,
a stationary index ring having notches with which
'18. In a device of the class described, a search
arm mounted on a friction-driven shaft and ar
code rings includes a swiveled member one por
ranged to explore an orbital path, a bladed mem
tion of which possesses paddle-wheel blade ele
ber pivotally mounted at one end of said search
ments engageable in an alignment of code ring 10 arm and capable of hypocycloidal movement, an
‘notches, and another portion of which is formed
index arm slidably mounted on said search arm
as a cloverleaf cam against the peripheral edges
and having a contractile spring which links it
‘of which an end of the index bar is pressed, the.
to the search arm and urges it into engagement
tension of a spring being supplied for exerting the 7
with a Cloverleaf cam structure integrally formed
15 with respect to saidlbladed member, means nor
.15. In a device for arresting a friction-driven
mally acting to restrain said bladed member from
shaft in a selected position of orientation, a Search
hypocycloidal movement, said means being selec
arm rotatable with said shaft, a seeker ‘member
tively adjustable to introduce a hindrance into
pivotally mounted at one end ‘of said search arm
the region surrounding said orbital path, there
and arranged to explore an orbital path in search 20 by to effect said hypocycloidal movement of said
of a hindrance to its progress, means for pro
bladed member and thus causing its progress to
ducing said hindrance at a selected point along
be retarded by the extension of said spring, and
said path, and resiliently held means for caus
means into which said index arm is caused to be
ingisaid seeker member to move hypocycloidally
latched upon extending the same against the
between the position where it is ?rst retarded by 25 contractile force of said spring.
said hindrance and the position where it is ?nally
19. In a device of the class described, a power
driven friction clutch, a shaft arranged to be
16,.‘ In a device for arresting a friction-driven
‘intermittently driven through said clutch, selec
shaft in a selected position of orientation, a search
tor mechanism including a plurality of notched
arm rotatable with said shaft, a seeker member 30 selector rings for determining different selected
pivotally mounted at one end of said arm and
positions at which said shaft is to be stopped, a
having a toothed gear portion and a cam portion,
stop arm ?xed to said shaft, an index rod lon
notches of said means being capable of align
ment for causing a tooth of said seeker gear por
tion to mesh therewith, and means for engaging
the cam portion of said seeker member thereby to
impede the rotation of the seeker member on its
pivot, and hence to produce a braking action prior
to the arrest of said shaft.
17. A device according to claim 16, and includ
35 said index rod may be engaged, and a seeker
member swiveled on said stop arm, said seeker
member having members for engagement with
the selector ring notches and a cam for coopera
tion with said index rod.
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