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Nov. 26, 1946.
Filed Feb. 20, 1943
6 Sheets-Sheet 1
Nov. 26, 194-6.
Filed Feb. 20, 1943
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6 Sheets-Sheet 2
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NW. 26, 1946.
6 Sheets-Sheet 3
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Nav. 26, 1946.
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Filed Feb’ 20, 1945
6 Sheets-Sheet 4
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Nov. 26, 1946.
Filed Feb. 20, 1943
6 Sheets-Sheet 5
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NOV. 26, 1946.
Filed Feb.‘ 20, 1943
v('3 Sheets-Sheét 6
Patented Nov. 26, 1946
2,41 1,780
Harold F. Elliott, Belmont, Mass.
Application February 20, 1943, Serial No. 476,563
10 Claims.
This invention relates in general to control ap
paratus operating to set up a predetermined pro
gram for performing predetermined operations
at desired time intervals over a period of twenty
four hours, or a greater or lesser period, as de
sired. More particularly, this invention relates
to a program preselector operating to effect de
sired operations at ?fteen minute intervals over
a twenty-four hour period of time. This applica
tion is a continuation in part of application Serial
No. 391,873, ?led May 5, 1941.
(01. 200-37)
A still further feature of the invention is the
provision of circuit routing means which include
yieldable switch means and a plurality of settable
program preselectors which mechanically oper
ate the switch means to provide an electric cir
cuit control pattern having a plurality of func
tions at a plurality of different intervals of time.
Other objects, features and advantages of the
invention will be apparent from the following
description taken with the drawings, in which:
Fig. l is a front elevation of the preselector de
Fig. 2 is a cross-sectional View substantially
lector adapted to set into operation a plurality of
functions at predetermined intervals over a pe 15 along the line 2—2 of Fig. 1 and looking in the
direction of the arrows indicated on such line;
riod of time.
An object of the present invention is to pro
vide an improved program or function prese
Fig. 3 is a fragmentary view, partly in section,
partly in full of the ?nger or index dial and
a program or function preselector having a sim
connecting means therefor, together with re
pli?ed and improved mechanism for initiating
and routing an electric circuit or circuits through 20 tarding mechanism to retard the return move
ment of such dial. This figure is taken along the
the preselector.
line 3—3 of Fig. 2;
A still further object of my invention is to pro
Fig. 4 is cross-sectional View along the line
vide a preselector device for setting up electrical
-i—4 of Fig. 2 showing various parts of the manu
circuits at predetermined times, which device is
ally operated automatic setting means in sec
adapted to operate with complete safety and satis
tion, in full, and in a fragmentary illustration;
faction over a range of voltages as low as 6 volts or
Fig. 5 is a detailed elevational view of the cast
lower, and as high as 110 volts or higher. These
conductor rings when joined together be
speci?c voltages mentioned, however, represent
fore being incorporated into the molded insulat
merely the low and the high of a voltage range
ing plate for the rings;
for many standard electrical control units which
Fig. ‘6 is an enlarged fragmentary view of the
might be operated by the device, and are not to
rotary switch assembly and its cooperating dis
be considered as limiting.
tributor plate embodied in the device of Figs. 1
Another object of my invention is to provide a
and 2;
A further object of my invention is to provide
preselector device adapted to quickly and simply
set up a comprehensive program of operations
over as much as twenty-four hour period, and yet
be compact in size, and simple in structure for
low-cost, high-duality production.
One of the features of my invention is the pro
vision of energizable circuit routing mechanism
for a preselector device adapted to operate over
a wide range of voltages.
Another feature of my invention is the provi
sion of a preselector device having a plurality of
die-cast metal, or molded insulating parts, or
both, which normally reduce the number of
parts in the device and simplify the assembly
and operation thereof while providing a sturdy
and ei?cient mechanism.
_ A further feature of the present invention is
the provision of simpli?ed and effective brush,
contact, and program timing means in a pre
selector device for completing electrical circuits
to operate and control apparatus electrically con
nected to such device.
Fig. 7 is an enlarged fragmentary sectional
view of a portion of the stationary insulating
plate having the conducting rings molded therein,
and showing the rings joined together by an in
tegral piece of metal which is machined out be
fore use of the complete unit;
Fig. 8 is an elevational view of the rotary con
tact unit of Fig. 2 with a portion of the unit
broken away;
Fig. 9 is a sectional view along the line l4—!4
of Fig. 8;
Fig. 1G is a fragmentary perspective view of
the rotary unit showing particularly the con
struction of the switch means thereon;
Fig. 11 is a diagrammatic illustration of the
circuit of the preselector device of the invention;
Fig. 12 is a rear elevational view of the device
of Figs. 1 and 2 with a portion thereof broken
Fig. 13 is a detailed view of the control switch
of Fig. 12 showing the contacts in closed position;
Fig. 14 is an illustration of the same switch
and associated cam with‘the switch in open po
Fig. 15 is an elevational view with a portion
broken away to show a modi?cation of the switch
means itself of the rotary unit of Fig. 8;
Fig, 15 is an enlarged sectional view of one of
the switch elements in the rotary unit of Fig. 15.
In practicing my invention I provide mechani
cally operated electrical circuit routing mecha
has merely a mechanical function so far as cir
cuit routing is concerned and serves to operate
a corresponding yieldable switch in extending an
electrical circuit through the preselector device.
The metal sliders I 38 are not electrically con
nected into the control circuit. The slider acts
merely as a mechanical key or cam to mechani~
cally operate a corresponding yieldable switch
means to route a circuit through the preselector
nism in a complete time controlled preselector 10 device. As a result there is no exposed portion
at the front of the device which is electrically
device adapted for electrical connection to con
' energized and consequently this embodiment is
trollable apparatus. The device includes a plu
readily adapted to 110 volt operation.
The hub or central portion ll of the member
able by manually operated means to predeter-i
is cup-shaped and is apertured at 19 to re“
mined radial positions in a frame. After the 15
ceive the rotatable mechanism for the hands
movable members are set up in a predetermined
of a clock, and acts to support the frame 2! for
pattern corresponding to desired operations in
the clock dial 22 thereon. A twelve-hour face
the controllable apparatus and corresponding to
is provided for the dial 22, and a minute hand
a predetermined time pattern, control circuits
are routed through the preselector device at pre 20 23, an hour hand 21!, a twenty-four hour hand
25, and a second hand 25 move over the dial
determined times by means including movable
face. The preselector device, as illustrated
members and stationary and movable circuit
herein, is adapted for twenty-four hour opera
completing mechanism. The circuit routing
tion, and the two twelve hour periods indicated
mechanism includes a stationary part and a
rotary part, with one of said parts comprising 25 on the face edge of an index dial 32 can be read in
conjunction with the movable hand 25. Dif
a molded insulating member having a plurality
colors can be employed in these ?gures
of conductor rings and integral terminal or con
whether the particular hour is in the
tact portions ?xedly molded therein, while the
day-time period or night period. The timing,
other part includes yieldable contact means.
circuit routing, and switch mechanism which
The radially movable members adapted to be set
will be described is adapted for twenty-four
up in a predetermined program operate in the
hour operation, and as is evident from Fig. 1
device of my invention in a purely mechanical
there are 96 sliders I38 corresponding to the 96
?fteen-minute intervals over a twenty-four hour
The manually operated means for automati
period. It is understood, of course, that the
cally setting the sliders or keys of the present
preselector device of the present invention may
preselector device to predetermined radial posi
be adapted for operation over other periods of
tions forms no part of the present invention.
This is taken directly from my copending appli
The present mechanism provides all of the ad
cation Serial No. 391,873, ?led May 5, 1941.
of a visual program setup, and in ad
However for a complete understanding of the
dition provides simple apparatus for automati
present invention it is being illustrated and will
cally and selectively moving each of the sliders
be described to show a complete device.
the precise point of electrical interconnection
As can be understood from Fig. 2, particularly,
with a conductor to route a circuit. Mechanism
substantially the entire mechanism illustrated
for accomplishing this includes a stationary
therein comprises simple stamped or possibly
stamped gear 21 secured intermediate the dial
cast, and molded parts. These parts include a
frame 2| and the hub portion M (Fig. 2). An
principal metal frame member to preferably cast
integral lug 23 (Fig. 3) on the gear 2'! acts as
in a form to provide a central hub i l upon which,
a stop for the moving connecting mechanism
and about which, associated elements are mount
including a bell crank lever 21»; which serves
ed. The frame member it also includes an an
with associated elements to connect the ?nger
nular portion l2 which includes a rim is visible
or index dial 32, and a slider setting member
at the face of the device as shown in Fig. 1,
33 which may be designated as a mover or a
, rality of members which are automatically mov
and a portion within the rim including a plu
pusher (Fig. 4).
rality of radially extending grooves 54, each
groove corresponding to a ?fteen minute inter
val of time in the twenty-four (24) hour period
as will be hereinafter more speci?cally described.
A metal slider 538 is provided for each groove
I4 and is slidably carried in a corresponding re
cess de?ned by front and back edges £39 and
Ml respectively in the frame member it. Each
slider I38 comprises an ear M2 at one end there
of which is engaged by the pusher 33 on the
automatic slider setting mechanism. The body
portion is split longitudinally to provide a pair
of legs Hi3 and ids which may be compressed
sufficiently to permit the introduction of the
slider in a corresponding frame member recess,
and thereafter will exert a pressure against the
The dial 32 is provided as a molded plastic
or the like member, and includes a plurality of
?nger holds F corresponding in number to the
functions desired to be controlled by the appa
ratus. For purposes of illustration the present
device is described as connected into a radio
receiver system, and consequently seven of the
?nger holds F carry broadcasting station indicia,
and the eighth hole F’ is used to index the “off”
position of the radio receiver system when a
?nger is inserted in this hold and the dial
moved to
The stop
apron, or
2!. The
a stop position, as will be explained.
for the ?nger dial comprises a ?xed
the like 313, secured to the dial frame
?nger dial 32 is secured to a metal
edges lie and Ml su?icient to maintain the 70 plate 35 (Fig. 3) rotatably mounted within, and
movable relative to, the cup-shaped metal mem
ber 31 which is journalled on the projecting por
tion H of the frame member ID.
The cup-shaped member 31 serves as a mount
H1 in the frame plate. As will be explained in‘
greater detail, the cam or projecting portion Hit 75 ing member for a movable rotary unit which in
slider in a set or predetermined position. A
cam or projecting portion Hit extends at right
angles from the leg Hit and rides in the groove
cludes a toothed cam member 38 rotatably se
cured to an inner annular ?ange 39 of the mem
ber 31, and such toothed member 38 includes a
cam groove with an eccentric surface 42 thereon.
The groove and surface 42 guides a follower 43
(Fig. 4.) which is mounted on the body portion
44 of the pusher 33. The body portion 45 of
the pusher 33 in turn is mounted for slidable
therewith in a straight-line radial direction.
Flanges within the guide member 46 maintain
the pusher in a straight-line direction as can be
understood from Fig. 4.
In the meantime, the cup 3‘.’ to the base 41
of which the guide member 46 is secured is main~
tained stationary relative to the movable dial 32
by means of holding or index mechanism illus
radial movement in a channelled guide member
43 rigidly secured to the base or bottom 41 of 10 trated in Figs. 2 and 4. This includes a bell
crank lever “M pivotally mounted intermediate
the cup-shaped member 31 (Fig. 2).
its ends on the bottom 41 of the member 31,
In preparing to set up a program or at least
having a roller 76 at one end, and a tension
move a slider i 6 radially to a desired prede
spring ‘I’! at the other end. The roller ‘I6 and
termined position, the plunger or pusher 33 is
?rst moved angularly into alignment with the 15 spring 71 are both positioned in corresponding
apertures within the base 47, as shown in Fig. 2.
desired slider. This is accomplished by grasp
The roller 16 rides in notches ‘78 formed in the
ing with the ?ngers the outside rim R of the
inside of the rim ‘is of the stationary plate por
member 31, and simply moving or rotating the
tion ‘I2 of the frame 13 as previously described.
member 3‘! and its associated elements just de
The spring Tl maintains sufficient tension on
scribed to a position such that the pointer 43
the lever ‘l3. so that the unit including the cup
(Fig. 1) on the rim of such member is opposite
is maintained stationary at an adjusted posi
the desired slider. As is understood from the
tion, but yet will permit ready manual move
above explanation, the toothed member 38, and
ment of the unit to originally set the pusher or
the plunger 33 and mounting 43 therefor, will
mover 33, as described.
move with the member 3'! as a unit.
As the tip T of the moving pusher engages the
In order to set in operation a particular func
ear 53 of the selected slider ltd the latter is
tion, which might be operating a furnace, turn~
moved radially outwardly a distance correspond
ing a valve, or as in the present instance, clos
ing to the radial movement of the follower 43
ing an electric control circuit for tuning the
radio receiver to a station corresponding to the 30 on the eccentric surface in the cam groove.
For instance, if the dial 32 was operated from
desired station indicated in a ?nger hole F, cir~
cuit routing mechanism is provided for func
tions corresponding in number to ?nger holes
F. Included in the circuit routing mechanism
the ?nger hole F with the indicia KRE, the
member 38 would be rotated a distance substan
tially equal to the arcuate length of the cam
groove causing the tip T to move outwardly to
are the metal sliders I38.
35 its maximum position and place the slider on
The sliders I38 in grooves Id at the left and
the outside circuit routing position as can be
right of Fig. 2 are both shown in “off” or rest
understood from Fig. 2.
position and out of position to make an elec
The dial 32 and associated mechanism is re
trical connection but it is obvious that they may
be moved outwardly by the pusher 33 to a desired 40 turned from an operated position to a position
of rest, as shown in Figs. 1 and 3, by means
predetermined position.
of coiled return springs. A coiled spring 33 is
The slider and slider supporting and guiding
supported on the plate 35 for the ?nger dial
mechanism, as well as the plunger or pusher
within lugs 82 stamped out at intervals in a
mechanism have been fully described, and the
circular path around the central portion of such
method of positioning, that is rotating the push
plate. One end of the spring 33 is connected
er assembly to align the pusher with reference
to one of the lugs 82, while the other end is
to a slider has likewise been described. The
connected to a lug on the stationary hub portion
operation of the plunger or pusher 33 in a radial
H. A coiled spring 34 (Fig. 4) rests in an an»
direction to in turn move a slider I38 outwardly
from a starting position to a set position will iii) nular cavity (Fig. 2*) at the inside portion iii
of the dial cup 3'!, is secured at one end to a
now be described. As previously mentioned, a
cut-out portion 83 in the rim of the annular
bell-crank lever 29 is pivotally mounted by
cavity, and is secured at the other end to a lug
8'! turned inwardly from the cam plate 33.
These springs are tensioned when the dial 32
is rotated clockwise, and act to return both the
dial and the cam plate to a position of rest.
At this position the end 33 of the lever 29 en
gages the lug 23, as heretofore explained, and
in position within the aperture 38 in the plate
36 for engagement with a tooth in the cam GO the lug 33 on the dial plate 33 engages the Othér
side of such lever end 63 to stop the dial. The
plate 38. In operating the setting mechanism
cam groove in the plate 38 is so proportioned
the operator places his ?nger in a hole F and
in length that the follower 43 will be in en
the dial 32 is rotated clockwise until the ?nger
gagement with the end of it, as shown in Fig. 4,
engages the stop 34. Upon the ?rst movement
means of a pivot {54 (Fig. 3) secured to the plate
36 mounting the ?nger dial 32. In a position of
rest for the ?nger dial 32, one end 36 of the
bell-crank lever is in engagement with the lug
28 on the stationary gear 21, while the other
end having a pawl or integral lug 3i thereon is
of the dial 32, as the pivot 64 for the lever 29
moves with it, the spring 33 acting on the bell“
crank lever pivots it into a position so that the
pawl 67 engages a tooth 12 in the toothed mem~
ber 33. Thereafter, as the dial is rotated clock
wise, the lever 29 moves the toothed member
38 therewith, and the cam groove with the ec
centric surface 42 causes the follower 63 therein
to roll and move radially with the arcuate or
angular ‘movement of the groove, and conse
quently move the pusher body 44 and tip T
when the lug 83 engages the bell-crank lever at
66, so that the pawl 6‘! is thrown out of engage
ment with a tooth 72 in the plate 33 when the
lever hits the lug 28.
Retarding mechanism is shown in
3 for
slowing the movement of the dial 32 and cam
plate 33 on the return movements under the
forces of the springs 33 and 813. This mecha—
nism includes a gear train including gears 33
and 32, with the latter engaging a corresponding
pinion gear 93 rotatably supported on the dial
plate 36. A pair of friction pawls or shoes 94
pressions appear above the dotted line in Fig. TI.
and 94’ are each pivotally mounted at one end
on supporting means movable with the pinion
The die-cast metal unit is then embedded in
moldable insulating material and the entire plate
Hill is molded with the ring assembly maintained
therein. After the molding operation is com
plete the straps M are machined off down to the
dotted line of Fig. 7, thus ‘providing the indi
gear 93. As the pinion gear 93 is rotated the
pawls are thrown outwardly by centrifugal force
and frictionally engage a stationary cap 36 se
cured to the plate 38. By this frictional engage
ment the movement of the gear train and hence
the dial and associated dial plate 36 are re
vidual rings insulatingly separated from one an
other and having a continuous smooth conduct
tarded. By virtue of the pawl Bl of bell-crank
lever 29 connecting the dial plate 36 and cam 10 ing surface Hi over the entire annular faces
thereof. Inasmuch as the projections H2 ex
plate 38 these move together. Hence the re
through the insulation over a very small
tarding mechanism in effect acts on the entire
cross-sectional area it is apparent that a large
counter-clockwise moving structure.
mass of molded insulating material is provided
As can be understood from the preceding de
for supporting the conducting means to in turn
scription the present device provides a means for
provide a rigid and well insulated unit.
setting up a program over a 24-hour period
The molded plate unit it! likewise serves as
which will initiate a particular predetermined
back frame member for the preselector device,
function in each 15 minute interval of time
and is provided with a rim or ?ange |5l through
over the entire 24-hour period. For purposes of
illustration only the device is connected with 20 which bolts I52 extend to secure the unit I41 and
a cover plate £53, all as an assembly, upon the
control apparatus which in turn tunes a radio
frame member lil. Likewise the top shaft and
receiver to at least '7 different stations as can
gear driving mechanism are all supported in
be seen from the '7 station indications in the
apertures I54 at various places over the entire
index dial 32 of Fig. 1. The eighth operation to
area of the unit. The back cover plate I53 in
be initiated is turning off the receiver circuit
combination with the molded plate unit pro
which is effected when a slider l?? is in the
vides a cavity at the back of the device for hous
radial position corresponding to the position of
ing gear trains and related elements, as well as
the ?nger hole F’ in the slider setting mecha
a cam control switch, while the clock motor C
nism. Obviously it is not necessary to set up a
different program for each 15 minute interval, 30 is mounted on the back of the cover plate. .
Control circuits within the preselector device
and assuming that the radio receiver has been
are extended through the conductor ring forma
tuned to a particular station in some interval
tion by means of yieldable switches on a rotary
of time in the ZLl-hour period, that station set
unit his (Figs. 2 and 8). The unit is supported
ting will remain the same until the routing
mechanism engages a slider I38 set radially in 35 upon a hub portion itll which in turn is secured
to the shaft N32 for the twenty-four hour hand
a groove ill at a position corresponding to some
25 of the clock. The shaft and rotary unit I55 .
other station setting.
are rotated by a driven gear H33’ which in turn
The stationary portion of the electric circuit
is driven by a pinion gear Hi5 connected with
routing mechanism includes a molded insulating
the clock motor C as previously described. Con
frame plate or unit lei.
sequently, the switch portion of the unit H56 ro
As to the unit lill, this comprises the molded
tates through one complete cycle each 24-hours
insulating plate liid and a plurality of conduc
and control circuits are completed at 15-minute
tor rings B89 molded therein. The conduc
intervals depending upon whether sliders I33 are
tor rings each comprise an annular ring por
set up at each such interval. The switch means
tion with a conductor surface iii, substantially
generally on the rotary unit I56 is illustrated in
?ush with the face of the insulating plate, the
detail in Figs. 8, 9, and 10, and likewise shown
in Figs. 6 and 2 in operating positions relative
to the sliders and conductor rings. The yield
material of which separates the plurality of
rings from one another as shown in Fig. 2. Each
ring likewise comprises a “single projection or
contact portion 5 l2 which extends at right angles
able switches are all in a rest position in Fig. 2,
and the sliders are in a non-operating position.
In Fig. 6 the slider its is in a preset position,
and one of the switches is in an operating position.
The switch means comprises a stacked assembly
from the body portion proper of the ring We,
and extends through the insulating material to
the opposite face of plate mil being exposed in
a small terminal portion M9 to which a con
ductor is secured, as shown in Fig. 12. The po
having a plurality of stamped-out plates arranged
as shown particularly in Fig. 9. Each one-piece
plate is‘! has a flat rim at each side for securing
it into the stack and a central slotted and formed
portion which includes a plurality of independ
a molded insulating plate or frame with a plu
rality of conducting members its embedded or 60 ently movable straps I62. Each strap has a stiff,
rounded central ?nger or contact portion i651
molded therein, with a continuous annular con
which in itself is non-yieldable, but the strap I62
ducting surface ll! at one face (the front) of
as a whole is yieldable in a direction at right
the plate, and a single restricted projecting con
angles to the plane of the unit H56 because of
tact portion exposed at the opposite face (back)
corrugated portion lad to each side thereof
and intermediate the outer secured rims and the
The insulating plate and conducting member
?nger portion I63. The three metal plates I6!
unit is preferably manufactured by first provid
including the straps and illustrated in cross-sec
ing a plurality of concentric die-cast annular
tion in Fig. 9, are identi?ed as T, I. and L respec
rings I69 with a single projection H2 extending
transversely at one point on each ring. The 70 tively, from top to bottom.
Although they are substantially identical in
rings are secured in spaced relation by a plu
construction they have different functions as
rality of straps M cast integrally with rings IE9
will be described.
as shown in Figs. 5 and '7. The inside face of
The plate T straps have purely a mechanical
each strap has depressions corresponding to the
spaces P between adjacent rings, and these de 75 function in the corresponding switches. This
sition of the respective terminal portions M9 on
the integral projections H2 can be understood
from Fig. 12. Therefore, the unit it! provides
2,41 1,780
plate T is insulated from the plates I and L by
means of a yieldable insulating plate I66 slotted
in a manner corresponding to plates I6I. It is
likewise insulated from the remainder of the
structure in the rotary unit I56 by means of
insulating bushings I62’. Actually, the bushings
the ?nger I63’. Therefore, when a complete
switch unit is depressed as shown in Fig. 6 the
circuit is extended through the plates L and I
and the corresponding depressed engaging ?nger
I63 to the conducting surface III of the corre
sponding conductor ring I66. This in turn ex
I67 and the insulating plate I66 are adapted to
tends the circuit through the corresponding ter
completely insulate the energizable conductor
minal I49 to a conductor in the electric cable
portions as represented by the plates I and L in
to a motor or the like to effect the desired
the complete switch asembly. The entire stack 10 going
corresponding function.
is secured together and mounted on the unit I56
Referring now to the switch FM, this is illus
by means of rivets or the like I 68 in the insulating
trated in Figs. 12, 13, and 14, and diagrammati
bushings I6'I. Apertured guide members I69 and
cally in the circuit diagram of Fig. 11. This in
HI at the top and bottom respectively of the stack
have apertures I12 which permit the protrusion 15 cludes a pair of yieldable arms I78 and I79 with
corresponding contact points I8I on the inside
of the ?ngers I63 on the individual straps, while
face thereof. The arm I79 is continuously en
the adjacent body portions of these guide mem
ergized by virtue of its connection with the con
bers con?ne and generally guide the movement
ductor I82 in the energized portion of the com
of the corresponding straps as they are depressed
when engaged by the cam or projecting portion 20 plete electrical system. The contact points I8I
are normally separated. However, during one
I46 of a slider. The height of the ?nger portions
portion of every 15-minute interval both arms
I63 on each strap, and the length of the cam
are ?exed to the position shown in Fig. 14 by
or projection I46 of the slider are such that
means of a rotary cam plate I 83 of insulating ma
coupled with the rotary path of movement of
terial. This cam plate is ?xedly mounted on the
the unit I56, a ?nger portion I63 of the plate T
shaft I34 connected to the clock motor C by
is depressed by the cam I46 when it passes there~
gears which cause it to rotate 360° in each 15—
period. The cam plate I83 is substan
In order to extend a circuit through the switch
tially rectangular in shape, and the leading edge
means of the unit I56, plates I and L are provided
slightly longer than the plate T to in turn provide 30 while rotating in the direction of the arrow in
Fig. 12 raises the arms so that they ride on the
an extra strap, and consequently an extra ?nger
outside surface thereof. A straight trailing edge
portion I63’ as shown in Fig. 6. This extra strap
I86 causes the shorter switch arm I 78 to drop
assembly is positioned under the body portion
the plate I83 ?rst, and then until the sec
of the insulating plate I66 which in turn abuts
and arm I'Iél has dropped from the plate, the
a block or the like I13 beneath the body portion
of the guide plate I69. By means of a corre
sponding block or the like I13’ below the insulat
contacts IS! are in engagement.
Then the arm
rear thereof. As will be explained the conductor
will be again described with reference to the con
trol or tuning of a radio receiver. It is assumed,
?rst of all, that the master switch I3‘! in the
I19 drops from the trailing edge, the contact
separate and the control circuit is broken.
ing plate, the corresponding ?nger portions I63’
Although the operation of this embodiment will
are continuously depressed, and the portion I63’
at the right as viewed in Figs. 2 and 6 rides con 40 undoubtedly be apparent from the preceding de
scription, an entire cycle of operations will be
tinuously upon the corresponding conductor sur—
described for a more complete understanding of
face II I’. The corresponding conductor ring in
the invention. Referring to the circuit diagram
cludes the projection with a terminal portion I :16’
Fig. 11, the operation of the preselector device
(Fig. 12) extending through the plate I48 to the
ring corresponding to the terminal I49’ is ener
gized momentarily or for any desired period at
each 15-minute interval as a result of closing
the switch I14.
However, as to each individually depressi-ble '
switch in the complete switch means in the unit
I56, as a ?nger I 63 on an individual strap of the
plate T engages the cam I46 of a slider I 38, the
portions I64 yield and the base of the ?nger I63
depresses corresponding portion of a strap I ‘I6 -'
(Fig. 6) of the insulating plate I 66. This in turn
depresses the oppositely disposed ?nger portions
I63 of the corresponding straps in the plates I
and L, and the ?nger portion I63 of the plate L
complete electrical system is closed, and that the
clock C is operating, thereby also rotating the
unit I56 therewith. Furthermore, one or more
of the preselector sliders have been set by the
means heretofore described to a predetermined
radial position corresponding to the station set
ting for the radio receiver. This station setting
or function corresponds to a particular conduct
ing ring I66 and its associated circuits.
With the switch I ‘I4 closed through the con
tact points IIiI, a circuit is completed from the
switch arm I78 through terminal I49’ and corre
sponding conductor surface III, through the ro
‘; tary unit switch including the ?nger portions
I63’, the switch plates I and L, and through a
depressed switch unit including a ?nger portion
I63 as shown in Fig. 10, back through the cor
gages the cam I46 on each individual slider, are
responding conductor iii and the integral termi
such that it is mechanically depressed for a short 6
nal portion I49. From that point the circuit is
space of time while the unit I56 is slowly ro
extended through a corresponding conductor
tating over its annular path. The time for this
I89, through the tuning motor I9I and back to
passage corresponds generally with the time
other side of the line including the switch
that the switch I14 is closed to complete the con
arm H9. The motor IQI moves the tuning mech
trol circuit.
anism for the radio set I92 while the control
It is assumed that the switch I14 is closed.
is energized and the receiver is tuned to
This energizes a conductor ring with the con
the desired predetermined station during the
ducting surface III, and plates‘ L and I in the
time that the switch I14 is closed by movement
switch means are both energized by virtue of the
of the cam plate I33, and the switch at the con
sliding contact with the conductor surface by
ductor ring surface III” is closed during the
engages a corresponding conductor surface I I I
of a conductor ring I09. As is evident from Fig.
9, particularly, the contour and dimensions of
the outermost part of the ?nger I63 which en
'movement of the switch unit in the rotary arm
R56. This tuned position'oi the radio receiver
H2 is maintained until the operation is dupli
electrically energized portions at the front thereof
and having a program plate with a plurality of
radially extending guides, the means for routing
a circuit through said apparatus including a
cated on some succeeding differently set slider
at a 15 minute interval in the twenty-four hour 01 movable unit engaging each guide and having a
projecting portion extending therefrom, a ?xed
period of time.
annular conducting ring, and rotary switch
A modi?cation of the rotary unit is illustrated
means having a yieldable contact portion, with
in Figs. 15 and 16 and designated by the refer
said switch means and a correspondingly mov
ence character the’. Electrically, this modi?ca
tion operates the same as the unit 556 including 10 able unit being engageable, and with one Of said
two speci?ed portions being in electrical engage
the switches thereon. rl‘he switch portion of the
ment with said conducting ring simultaneously
unit, however, differs as can be understood par
with said engagement of said switch means and
ticularly from Fig. 16. The unit I56’ includes an
movable unit.
insulating plate recessed at the outer end to pro
3. In preselector apparatus having no exposed
vide a pair of leg portions i?é and 196. The guide
electrically energized portions at the front thereof
plate till is secured to one side of the insulating
and having a program plate with a plurality of
‘plate (Fig. 15) and is apertured with a plurality
radially extending guides, the means for routing
of apertures E98 longitudinally thereof. The
a circuit through said apparatus including a
switch means itself comprises a plate i799 hav
ing a plurality of yieldable ?ngers 2E3! extending 20 movable unit engaging each guide and having a
away from a mounting rim at one side thereof.
The metal plate 5% is secured to the underside of
the leg tee of the insulating arm and the indi
vidual ?ngers Edi extend in a direction so as to
ride upon a corresponding conducting surface 1 i i
of aring E89.
Individual ?ngers are normally out of contact
with the conducting surfaces and rest in a posi
tion shown by dotted lines in Fig. 16. An insu
lating bushing with a pin secured in each bush
.ing is provided on each ?nger. Each pin has a
shank extending away from the bushing to a
projecting portion extending therefrom, a ?xed
annular conducting ring, and rotary contact
means rotating in a path intermediate the pro
jecting portion and the conducting ring and
with the projecting portion extending into said
path, said rotary contact means including an
electrically energized contact portion and a de
pressible portion insulated therefrom but oper
atively connected therewith at least in a de
pressed position, with said depre‘ssible portion be
ing depressed upon engaging said projecting por
tion, and said contact portion being moved by
said depressible portion into contact with said
head 2&3 on the outside of the guide plate I92’.
conducting ring.
The shank of such pin extends through the aper
a. A program preselector for routing electrical
ture l98 and is slidable therein to maintain the 35
circuits including in combination a die-cast metal
corresponding ?nger Edi in alignment.
frame with a plurality of guides extending ra
A continuously depressed ?nger (not shown)
dially from a common center, a metal member
corresponding to the switch including the ?nger
movable along each guide to predetermined posi
portion I63’ of Fig. 6, rides on a corresponding
tions, and circuit means-including a plurality of
annular conducting surface to energize the entire
concentric stationary conductor rings spaced
plate 195 including the plurality of ?ngers 20L
apart in the radial direction of said guides, a
Therefore, the circuit is completed through the
rotary unit having a portion rotatable through
plate 599 when a ?nger 253i is depressed by the
360° for each program cycle for said preselector,
cam action of the cam portion M6 on a slider i38
and yieldable switchmeans on said unit at said
as previously described. The cam portion 1%
portion including a plurality of movable means
engages the head E53 and depresses such head
corresponding to said rings, with each movable
and the corresponding bushing 292, to in turn
means having one part for engagement with a
depress the ?nger 28: into engagement with the
conductor ring and another part engageable by
conductor surface 5 i i.
a metal member in a predetermined set position
The general circuit operation of the ‘switch on
to move the movable means upon such engage
the rotary unit H56’ is the same as that described
ment and move said one part into mechanical
with reference to the unit 558.
and electrical engagement with a corresponding
Although the invention has been described and
illustrated in its preferred embodiments, it is un
5. A program preselector for routing electrical
derstood that'it is not limited thereby, and is ; circuits including in combination a metal frame
limited only by the scope of the appended claims.
plate having a plurality of radially extending
I claim:
guides, a metal member movable along each guide
1. In apparatus for setting up a predetermined
to a predetermined position, a rotary unit having
program as to time and function and controlling
switch means thereon including three stacked
electrical circuits therewith having a plurality
metal plates-with each of said plates having a
of settable means thereon, the means for rout
movable portion intermediate the sides thereof
ing a circuit through said apparatus in accord
and said movable portion comprising a sti?" cen
ance with the positions of the settable means in
tral projection and yieldable portions on each
cluding a rotary unit having a plurality of yield
side thereof, and said switch means including
able switch means thereon with each switch
movable insulating means, with two of said metal
means being operable and yieldable independ
plates being adjacent and positioned in the stack
ently of the others, and each switch means in
with the central projections thereof extending in
cluding a depressible portion adapted for engage
opposite directions, and with said insulating
ment with a corresponding settable means and a
means separating said two plates from said third
contact portion movable by said depressible
plate, said third» plate and said stack being
means, and said routing means also including a
mounted on said unit in a position such that said
plurality of conducting members to be selectively
central projection on said third plate upon rota
engaged by corresponding switch means contact
tion of said unit engages a correspondingly set
portions upon a depressing operation thereof.
metal member to be depressed thereby to in’ turn
.2. In preselector apparatus having no exposed 75
depress said insulating means and said two ad~
jacent plates, and a conductor ring engageable
ting member and said routing means comprising
an elongated substantially flat body portion split
by one of said two adjacent plates upon said de
pressing operation.
6. A program preselector for routing electrical
circuits including in combination a rotary plate
with switch means thereon having guide means
on one side of said plate, a yieldable contact ?n
ger on the other side of said plate, an insulating
member intermediate said guide means and said
contact member and mounted on the latter, and
a guide pin ?xedly mounted in said insulating
member and having a head on one end, and hav
longitudinally over one portion thereof to provide
a pair of longitudinally extending legs joined at
one end, a projecting portion extending outward
ly at right angles from one of said legs integral
with said leg and in the plane of the body portion
of said unit, said projecting portion being
adapted to be engaged by the routing means, and
an ear at said joined end in said body portion ex
tending in a direction opposite to said projecting
portion, said ear being adapted to be engaged
by the setting member.
ing a shank below said head slidable in said guide
9. A program preselector apparatus compris
means, a stationary annular conducting ring, a 15
ing, an annular program member having a plu
metal frame plate having a plurality of radially
rality of elongated peripheral guides, a settable
extending guides, and a metal member slidable
element movable along each guide and having a
along each guideway and having a projecting por
portion projecting therefrom, and means for
tion extending into the path of said guide pin
routing a circuit through the apparatus includ
head in said switch means adapted to engage said
ing a ?xed annular conductive member and a
pin head and being of such a length as to depress
rotary switch member having a yieldable actuat
said pin head to simultaneously urge said contact
ing portion engageable with said projecting por
member into electrical engagement with said con
ducting ring.
tions of said settable elements when set to cor
responding predetermined positions and a con
7. In a preselector device having a program set
tact portion operable by said actuating portion
ting portion with a rotary circuit routing means
into engagement with said conductive member,
and a driving motor therefor, the means for ex
tending a circuit through said circuit-routing
means and for housing the same including a sta
tionary molded insulating unit having a plate
portion with a plurality of spaced apart concent
tric conductor rings embedded therein, a terminal
portion on each ring and integral therewith ex
tending from said plate portion at one side there
of, said insulating unit having an integral an
nular rim thereon positioned to form a cup
shaped cavity with said one side of said insulat
ing plate portion, conductor means in said cavity
connected with said terminal portions, movable
switch means in said cavity and in electrical con—
nection with at least one conductor and one ter
said contact portion being insulated from said
settable elements and their supporting program
10. A program preselector apparatus compris
ing, an annular program member having a plural
ity of elongated peripheral guides, a settable ele
ment movable along each guide and having a por
tion projecting therefrom, and means for routing
a circuit through the apparatus including a plural—
ity of coaxial ?xed annular conductive members
and a rotary switch member having a plurality of
spaced yieldable actuating portions each engage
able with said projecting portions of said settable
elements when set to corresponding predeter
mined di?'erent positions and a plurality of con
minal portion, and a cover plate secured to said
tact portions individually operable by said actu
annular rim and closing said cavity at the open
ating portions into engagement with one of said
side thereof.
8. In a preselector device having a program 45 conductive members, said contact portions being
setting member and rotary circuit routing means,
the combination unit for engagement by said set
insulated from said settable elements and their
supporting program member.
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