US2155304A - Radio tuning apparatus - Google Patents

Description

April 8, 1939. G. H. COREY 2,155, 04

RADIO TUNING APPARATUS Filed Nov. 5, 1937 v Sheets-Sheet 1 Jnvmtor 950F195 H. CORE) Bu (Ittorneg April v G. H. COREY 2,155,304

RADIO TUNING APPARATUS Filed Nov. 5 1957 'TSheets-Sheet 2 ZSnnentor Eoxgs H. COREY attorney April 18, 1939. G. H. COREY RADIO TUNING APPARATUS Filed Nev. 3, 1937 7 Sheets-Sheet 3 3nnntor $5012 5 H. CORE),

(Ittorneg April 1939- G H. COREY 2,155,304

RADIO TUNING APPARATUS Filed Nov. 5, 1937 7 Sheets-Sheet 4 Z'Snuentor Q Q H. COREY 44 MW 8! a v Q MM (Ittomeg April 1939- G. H. COREY 2,155,304

7 RADIO TUNINGAPPARATUS Filed Nov. 5, 1937 7 Sheets-Sheet 5 8 3nventor QEORE CO E Gttorneg April 18,1939- GA'H COREY I 2,155,304

RADIO TUNING APPARATUS,

Filed Nov. 3, 1937 7 Sheets-Sheet 6 Zhwentor v H u I 950K915 H. comm attorney April 1939- s. H. COREY 2,155,304

RADIO TUNING APPARATUS Filed Nov. 3, 1937 '7 Sheets-Sheet '7 TUNINQ CONDENSER Enver'xtor QEoRgE H. CORE y.

(Ittorncg Patented Apr. 1a, 1939 UNITED STATES PATENT OFFICE RADIO TUNING APPARATUS Application November 3, 1937, Serial No. 172,530

11 Claims.

This invention relates to tuning apparatus for radio receivers.

One of the objects of the invention is to provide means associated with the tuning device of a radio and/or television receiver iorautomatically tuning the latter to one or more preselected broadcasting stations at predetermined intervals during a period of time so that programs previously selected will automatically be received during said intervals. For convenience in reference the term radio" will be used to designate receivers for visual reproduction of images, as in television, as well as for sound reproduction.

Another object of the invention is to provide automatic means for instantaneously tuning a radio receiver to a particular broadcasting station.

Another object of the invention is to provide a radio receiver with time controlled means for automatically tuning the receiver to a plurality of pre-selected broadcasting stations at predetermined intervals of time and with automatic means for instantaneously tuning the receiver to a selected broadcasting station without disturbing the time controlled selections of other sta.-'

tions.

A yet further object of the invention is generally to provide automatic tuning devices of the character described which are simple in construction and reliable in operation.

The above objectsof the invention and other objects ancillary thereto will be fully understood from the following description considered in connection with the accompanying drawings.

In the drawings:

Fig. l is a perspective view of the control apparatus embodying the present invention;

Fig. 2 is a sectional view, on a larger scale, on the line 2--? of Fig. 1;

Fig. 3 is a sectional view on the line. 3-3of Fig. 1;

Fig. 3A is a detail sectional view on the line 3A-3A of Fig. 1;

Fig. 3B is a detail sectional view on the line 33-33 of Fig. -1;

Fig. 4 is a view on the line 4-4 of Fig. 3;

Fig. 5 is a sectional view on the line 5-5 of Fig. 3;

Fig. 5A is a fragmentary enlarged face view of parts illustrated in Fig. 5;

Fig. 6 is a longitudinal sectional view of the apparatus taken on the'line 66 of Fig. 4;

Fig. 7 is a detail sectional view on the line 1-1 of F18. 3;

Fig. 8 is a detail sectional view on the line 8-8 of Fig. 5;

Fig. 9 is a perspective view of the movable selector switch member;

Fig. 10 is a more or less diagrammatic view of the apparatus showing the wiring diagram;

Fig. 11 is a view partly in elevation and partly in section of the tuning condenser and oi. the tuning controllers;

Fig. 12 is a view on the line |2-|2 oi Fig. 11;

Fig. 13 is a view on the line iii-l3 of Fig. 11.

Referring now more particularly to the drawings, the control apparatus embodying the present invention is here shown housed within a cabinet l having an opening through which a clock dial I2 is visible. If desired, said cabinet may be part of the cabinet of the receiver or, alternatively and as here shown, may be a separate cabinet, especially when remote control of the radio receiver is desired. A time selector knob l4, station selector knob l6 and companion push button l8, and an instantaneous tuning knob 20, are disposed at the front wall of the cabinet, and in addition said front wall has disposed thereon the main circuit controlling switch 22 and a switch 24 actuated for returning the control members of the apparatus to initial position. As shown in Fig. 1, knob I I has dial indications thereon arranged to cooperate with a. stationary index pointer [9 for indicating time, and station selector knobs l6 and 20 have station indications thereon arranged to cooperate with stationary pointers l1 and M, respectively, for obtaining station indications in the movement of said knobs.

By means of mechanisms and devices which will hereinafter be described and upon actuations of the time selector knob H, the station selector knob l6, and push' button It, provision is made for automatically tuning the radio receiver to a number of selected broadcasting stations at predetermined intervals during a period of time, say twelve hours, so that programs previously selected will automatically be received during said intervals. Thus, for example, in utilizing the present apparatus the time selector knob I4 is rotated to a desired time indication corresponding to the time of a desired broadcast. The station selector knob I is rotated to indicate the station desired to be received at the time set bythe operation 0! knob I, after which push button I8 is actuated. This operation of knobs I4 and I6 and push button l8 as just described sets the control apparatus so that the radio receiver will be automatically tuned to the selected station at the selected time. This operation may be repeated for additional stations so that for a certain period of time, normally twelve hours, the radio receiver will be automatically tuned to a number of broadcasting stations and will remain automatically tuned to any one station for a predetermined length of time. In the arrangement herein illustrated, the apparatus is designed to control for broadcasting intervals of at least fifteen minutes and the indicating dial for knob I4 is graduated accordingly. Thus, for a period of twelve hours, the radio receiver may be tuned automatically to forty-eight broadcasting intervals of fifteen minutes each and to one or more preselected broadcasting stations so that by properly setting the control apparatus in advance the radio receiver will be successively tuned automatically to diiferent radio programs.

As clearly shown in Figs. 2 and 3 of the drawings, an electric clock 28 is mounted within cabinet l8on the front wall of the latter and is provided with minute and hour hands 28 and 38 movable over dial l2. Said clock is also provided with an arm 32 which is actuated by the clock mechanism and rotates at the same speed as hour hand 38. Said arm carries a switch contact member 34 arranged to engage and make electrical contact with the ends 38 of a plurality of time contact members 38 consisting, as here shown, of iron bars. It will be understood that there are as many time contact members 38 as there are time intervals for which the apparatus may be set and that accordingly in the arrangement here shown where the apparatus is designed for tuning the receiver automatically to forty-eight intervals of fifteen minutes each there are fortyeight time controlled members. Each time contact member 38 has a companion time contact member 48 in longitudinal alignment therewith (Fig. 6).

As clearly shown in Figs. 4 and 5, time contact members 38 are disposed in equally spaced circumferential relation in conjunction with a plurality of station control members 42. Said station control members are composed of annular sheet metal disks of the same size and disposed in axially spaced relation. Annular disks 44 of insulation material are disposed between adjacent metal disks 42. Said metal and insulation disks are arranged in sets A and B with the disks of set A axially spaced from the disks of set B. The disks of set A are arranged in face to face relation and are carried by a supporting member 48 which is provided with a hub portion 48, about which said disks are disposed, and l with a flange 58 in face to face engagement with the adjacent insulation disk 44. The disks of set B are similarly disposed and carried by a supporting member 52 provided with a hub portion 54, about which the disks of set B are disposed, and with a circular flange 58 in engagement with the endmost insulation disk 44 of said set. Supporting members 48 and 52 are in turn supported by annular disks 58 of insulation material secured to the opposite outer surface of the reflexed portions 88 of arms 82 which are secured at their opposite end portions 84 to the inner surface of the front wall of cabinet l8. Said, disls 58 may be secured to said arms 82 in any suitable manner, as by bolts 88. It will be observed that the disks or sets A and B are clamped between circular flanges 58 and 58 and adjacent disks 58 respectively, and that supporting menibers 48 and 52 are secured to disks 58 by screws 88.

As shown in Fig. 5, hub portion 54 of supporting member 52 is provided with a plurality of circumferentially spaced longitudinally extending grooves 18 within which the stationary time contact members 38 are individually mounted, and as indicated in Figs. 4 and 6, hub portion 48 of supporting members 48 is provided with similar circumferentially spaced longitudinally extending grooves 12 within which the stationary time contact members 38 are individually mounted, grooves '18 and (2 being in longitudinal alignment. However, as shown in Figs. land 6, circular flange 58 of supporting member 48 is provided with a plurality of circumferentially spaced openings 14 in alignment with grooves 12 for the extension of ends 38 of stationary contact members 38.

Disks 42 and 44 have circumferentially spaced grooves 18 and 18 respectively in radial alignment with the grooves 18 or 12 of the supporting members on which said disks are mounted and said grooves are defined by circumferential rim portions 88 and 82 of disks 42 and 44, respectively, and by the internal radial projecting toothed- like portions 84 and 88 of disks 42 and 44, respectively.

By reference more particularly to Figs. and 5A, it will be observed that grooves 18 are somewhat wider than companion grooves 18 and that disks 42 and 44 are so disposed and the construction is such that one side edge 88 of each portion 84 of metal disk 42 is in alignment with the adjacent edge portion 38 of toothed portion 88 of insulation disk 44, the other groove defining edges of disk 42 being spaced outwardly of the corresponding groove defining edges of disk 44. Adjacent metal insulation disks are held in this relation by projections 92 formed on metal disks 42 and received in recess 94 formed in insulation disks 44 (Fig. 8).

Movable contact members 98, illustrated in Fig. 9,, are disposed for longitudinal movement in engagement with stationary contact time members 38 and 48 in the passages formed by grooves 18 and 18 of disks 42 and 44. Said members 98 are permanently magnetized whereby they remain in adjusted position in engagement with iron contact members 38 and 48 until positively re-adjusted. Each movable contact member 98 com prises a bar 91 having end projections 98 which in the movement of said members through the slots in the disks make contact with said metal disks only at the edges 88 of disk portions 84 of the metal disks, the end portions of members 98 which include said projecting portions 98 having a thickness substantially equal to the width of a groove 18. The length of bar 91 is such in relation to the spaced positions of metal disks 42 and insulation disks 44 that in any position of member 98 one end portion 98 is in engagement with a metal disk 42 of one of the sets of said disks and the other end portion 98 is in alignment with an insulation disk 44 of the other set of said disks. Thus, as illustrated in Fig. 6, the left end portion 98 of member 98 is in engagement with the innermost metal disk 42 of set A while the opposite end portion 98 of set member 98 is in alignment with the outermost insulation disk 44 of set B. By reason of this construction and arrangement a member 98 can make contact with only one station disk 42 at a time. Each member 98 is provided with an arm I88 by which said member is moved iongitudinally of stationary contact members 38 and 40 in engagement therewith and transversely of the metal and insulation disks of the channels provided by the grooves formed in said disks. Arm I00 may be formed integral with bar 81 or may be formed separately from any suitable material and need not be magnetized.

The movable contact members 06 are actuated selectively under the control of mechanism operated by time selector knob I4 and station selector knob and push button I6 and I8, respectively. Said mechanism comprises a longitudinally movable shaft I02 mounted at its ends in a bearing I04 formed in hub portion 48 of supporting member 46 and in a bearing I06 formed in a solenoid I08 fixed to the rear wall of cabinet I0. Said shaft has a circular disk I I0 fixed at one end thereof and arranged to engage arms I00 of members 96 when the shaft is moved longitudinally to the right for returning all of said members to initial position when solenoid I08 is energized upon actuation of switch 24, as will hereinafter be described in greater detail. Shaft I02 is moved longitudinally in the opposite direction by a spring I I4 which bears at one end on a solenoid I08 and at its other end on a disk II6 fixed to the shaft.

Said shaft also extends through a sleeve H8 and may have a bearing in said sleeve for further support thereof. Sleeve H8 is mounted for rotary and longitudinal movement within a sleeve I20 fixed to or integral with a gear I22 and forming a hub portion of said gear. Sleeve I20 is journalled for rotation in a bearing I24 formed in the hub portion 54 of supporting member 52. Sleeves 'I I8 and I20 are connectedto rotate together and to have relative longitudinal movement. For this purpose sleeve H8 is provided with a longitudinally extending slot I26 and sleeve I20 is provided with a pin I28 fixed thereto and projecting into said slot whereby rotation of sleeve I20 pursuant to rotation of gear I22 is effective to rotate sleeve I I8 while said last mentioned sleeve can move longitudinally of and on shaft I02 and longitudinally of and in sleeve I20. An arm I30 is fixed at one end of sleeve H8 and is constructed and arranged to engage the arm I00 of a selected movable contact member 96. The other end of sleeve H8 is provided with a fixed grooved collar I32. A spring I34 bears at one end thereof against said collar and at its other end against gear I22 whereby to urge sleeve I I8 to retracted position and to move said sleeve and arm I30 carried thereby to said position.

Gear I22 meshes with a gear I30 fixed to a rotary shaft I38 mounted in bearings I40 and I42. Knob I4 is fixed to the outer end of shaft I38 whereby rotation of said knob is effective to rotate gear I22, the sleeve or hub portion I20 thereof, and sleeve I I8 and its arm I30 for positioning said arm selectively in alignment with an arm I00 of one of the time contact members 86. After arm I30 has been selectively positioned by rotation of knob I4, said arm is moved longitudinally into engagement with the arm of the selected contact member 06 for moving the latter longitudinally, to the left, viewing Fig. 2, for selecting the station to be received at the selected time.

The mechanism for moving the selected contact member 96 to make contact with a desired station disk 42 comprises in addition to sleeve II8 a pivoted lever I44 having a forked end I46 which engages within the groove of collar I32. Said lever is pivoted intermediate its ends on a pivot pin I48 mounted in a bracket I60 fixed to the wall of cabinet I 0. The other end I52 of lever I44 is arranged for engagement by a selected one of a plurality of pins I54 fixed to and projecting radially of a rotary shaft I56. Pins I54 are arranged in longitudinal and circumferentially spaced relation on shaft I56 whereby a predetermined rotary movement of said shaft is effec tive to bring one of said pins into alignment with the end I52 of lever I44, as shown in Figs. 3 and 7 so that longitudinal movement of said shaft toward the right, viewing Fig. 3, is effective to move lever end I52 to the right and the opposite lever end I46 to the left for projecting sleeve I I8 and arm I30 carried thereby and thereby to move the selected contact member 96 longitudinally for contact with the desired station disk. Shaft I56 is mounted for rotary and longitudinal movement in bearings I58 and I60 and is normally held in retracted position by the spring I62 which bears on one end against bearing I58 and at its other end against a. disk I64 secured to said shaft.

Knob I6 is connected to one end of shaft I56 for rotating the latter. Said knob, however, is longitudinally fixed in relation to the front wall of cabinet I0 by inner and outer collars I51 and I58, as shown in Fig. 3A. Also as here shown the knob I6 has an integral or fixed stem I6I which is received within shaft I56 and is connected to the latter by a pin I63 movable longitudinally of a slot I65 in the shaft whereby said knob is effective to rotate said shaft while permitting longitudinal movement of the latter. Push button I8 is connected to shaft I56 for moving the latter longitudinally against the force of spring I62, and for this purpose said knob is connected to the outer end of an arm I66 which is mounted for longitudinal movement in a bearing I68. The inner end of said arm has a reflexed yoke portion I10 which engages a grooved collar I12 fixed to shaft I56.

Reverting to the station selector pins I54 and their engagement with lever I44 for actuating said lever to project sleeve H8 and arm I30 carried thereby for in turn moving the selected contact member 06 to the desired position for engagement with a predetermined station disk 42, it will be observed that whileshaft I56 is moved the same longitudinal distance upon each actuation of push button I8, the distance of the longitudinal movement of sleeve I I8 and its arm I30 is inversely proportional to the distance of the several station selector pins I54 from the end I52 of lever I44 in the retracted position of the associated parts of the mechanism;

As illustrated more or less diagrammatically in Fig. 10 the tuning devices I80. which will hereafter be described in more detail, are connected to the electric circuit for energization from source I14 under the control of the above described apparatus. From the above description it will be understood that when the movable contact member 32 of clock 26 makes contact with the end 30 of one of the stationary contact members 38 a station selector disk 42 is connected to the electric source I14 (Fig. 10), which is engaged by the contact member 96 which has been projected for this purpose as hereinbefore described. For time control, tuning devices I80 are connected to companion station disk 42 by wires I82. Said tuning devices are also arranged for direct control by a switch I83 operated by knob 20. Said switch I83 includes a plurality of stationary contact members I85, one for each broadcasting station to be received, and a movable contact member I86 rotated by knob 20 (Fig. 3B),

said tuning device being electrically connected to said switch by wires I81. The circuit through said tuning devices I80 has a common return wire I88.

Referring now more particularly to Figs. 11 and 12, the turning means including devices I80 will now be described. As here shown, said tuning devices I80 are associated with the rotary shaft I 92 by which the movable condenser plates of the tuning condenser I96 are adjusted for tuning the receiver R to the frequency of a desired broadcasting station. Said shaft is rotated selectively by each of said tuning devices I80. Each tuning device comprises a stationary support I98 provided with three pin rollers 200 projecting therefrom and arranged in triangular relation. An annular plate 202 having a central opening 204 therein is mounted on said pin roller 200 for adjustment circumferentially in its own plane. Annular member 202 is provided with a peripheral gear portion 206. Said gear portion is of the worm wheel type and is in mesh with a worm gear 208 fixed to a rotary shaft 2I0. Said shaft is mounted for rotation in bearing 2I2 formed in support I98 and may be rotated by a knob 2I4 which, as here shown, is accessible externally of the wall 2I6 of the cabinet of the radio receiver.

A solenoid 2I8 is pivotally mounted on member 202 by means of a pin 2I9 fixed thereto and having a pivoted bearing in said member. Said I solenoid is connected by wires I82 and I81 to the station disks 42 and to switch I83, respectively, whereby said solenoid may be energized either under the control of the time switch and the associated station switches and time switch contact members or independently of the latter directly under the control of switch ,I83. The solenoid armature 224 is pivotally connected to a link 226 which in turn is pivotally connected toa ring member 228 fixed to said shaft I92. The parts are designed so that when the solenoid and its armature and link 226 are in a straight line the radio is tuned to the selected broadcasting station. This alignment of the solenoid and its armature with link 226, effected when the solenoid is energized, results from the fact that the solenoid and the armature adjust themselves in relation to each other as the armature attempts to reach the magnetic center of the solenoid. It will be understood that member 202 is initially adjusted by means of knob 2 I4 when the solenoid is energized, and its armature is in alignment with link 226 as shown in full lines in Fig. 12, and by said adjustment of knob 2 I4 the radio receiver is manuallytuned to a predetermined frequency and hence to a predetermined broadcasting station operated on such frequency. The relation of member 202 to the solenoid and its armature being thus adjusted for one broadcasting station, the subsequent energization of the solenoid will automatically tune the receiver to the same station. Similarly, the other tuning controllers are adjusted for operating shaft I92 to tune the radio receiver by means of condenser I96 to other frequencies and to the broadcasting stations corresponding thereto. Thus, when one of the tuning controllers is energized to adjust the condenser or other tuning means, the other tuning controllers and more particularly the solenoid and armature are displaced in relation to their companion links 226, but when any of such relatively displaced solenoids is energized under the control of the station selector disks; and their associated mechanisms, said solenoid and its armature is caused to return to its aligned position with companion link 226 and thereby rotates condenser shaft I92 to tune the radio receiver to the respective broadcasting station.

It is seen from the above that the radio receiver R may be automatically tuned, by proper setting of the time and station selector mechanisms to receive a member of broadcasting stations in succession in predetermined order. Provision is also made for furnishing automatically a period of non-reception between two or more periods of reception. For this purpose there is provided a cut-off disk 230 of the same construction as station disks 42 and assembled with the latter in the disks of set A. Said cut-off disk- 230 is made of metal and connected by a wire 232 to a solenoid 234, of circuit controller 236 (Fig. 10); Accord ingly, when one or more contact members 96 are engaged with said cut-off disk 230 a circuit will be made at the selected times for energizing coil 234 to attract pivoted switch arm 238 which carries movable contact member 240 whereby to move said member away from its companion stationary contact members 242 to interrupt the circuit through the wires 244 which connect the receiver v R to the power source I14. Subsequently when a predetermined station disk 42 is electrically connected to its companion tuning device I by means of movable switch contact member 32 and switch member 96, a circuit is completed through solenoid 246 which attracts circuit controller arm 238 and completes the circuit through switch contact members 240, 242, 248 and 250. When the circuit is made through contact members 248 and 250, solenoid 246 is shunted thereby permitting solenoid 234 to attract switch arm 238 when the cut-off disk 230 is again connected for the energization of coil 234. It will be noticed that clock 26 and the radio receiver R are connected directly to the power source I14 and that the rest of the control apparatus is connected to said source through a step-down transformer 252 as relatively low voltage is preferable.

When it is desired to return all of the projected contact members 96 to initial retracted position, the solenoid I08 is energized by actuation of push button switch 24 thereby moving shaft I02 longitudinally to the right, viewing Fig. 2, whereby to engage disk IIO with the arm I00 of said contact members 96 to move said contact members to the right adjacent disk 58.

Thus it is seen that the apparatus herein shown or described is well adapted to accomplish the several objects of the present invention. It will be understood, however, that the invention may be embodied otherwise than as here shown and that in the illustrated embodiment certain' changes in the construction and arrangement of parts may be made. Therefore, I do not wish to be limited precisely to the present disclosure except as may be required by the scope of the appended claims.

Having thus described my invention, what I of the contact portions of one of said station selector members with the stationary contact members having the same time relation, and means for selectively actuating said movable contact members.

In a control system of the class described, a

plurality of station selector members each having a plurality of electrical contact portions arranged in relation to time, a plurality of stationary contact members common to all of said station selector members and arranged in the same time relation as said contact portions, a plurality of movable contact members each constructed and arranged to electrically connect one of the contact portions of one of said station selector members with the stationary contact member having the same time relation and rotary and longitudinally movable means for selectively actuating said movable contact members.

In a control system of the class described, a plurality of station selector members each having a plurality of electrical contact portions arranged in relation to time, a plurality of stationary contact members common to all of said station selector members and arranged in the same time relation as said contact portions, a plurality of movable contact members each constructed and arranged to electrically connect one of the contact portions of one of said station selector members with the stationary contact members having the same time relation, said movable contact members having magnetic engagement with said stationary contact members for releasably retaining said movable members in predetermined relation to said station selector members, and means for actuating said movable contact members.

4. In a control system of the class described, a plurality of station selector members each having a plurality of electrical contact portions arranged in relation to time, a plurality of stationary contact members common to all of said station selector members and arranged in the same time relation as said contact portions, a plurality of movable contact members each constructed and arranged to electrically connect one of the contact portions of one of said station selector members with the stationary contact members having the' same time relation, said movable contact members having magnetic engagement with said stationary contact members for releasably retaining said movable members in predetermined relation to said station selector members, and rotary and longitudinally movable means for actuating said movable contact members.

5. In a control system of the class described, a support, a plurality of annular metal members arrange-d co-axially on said support in spaced relation and insulated from each other, said members having internal radial projections spaced from each other in relation to time, stationary contact members mounted on said support in spaced relation, each of said stationary contact members extending transversely of said annular members and spaced from said projections, and movable contact members for connecting said stationary contact members individually with a selected projection, and means for selectively actuating said movable contact members.

6. In a control system of the class described, a support, a plurality of annular metal members arranged co-axially on said support in spaced relation and insulated from each other, said members having internal radial projections spaced from each other in relation to time, stationary contact members mounted on said support in spaced relation as to time, each 01' said stationary contact members extending transversely of said annular members and spaced from said projections, and movable contact members for connecting said stationary contact members individually with, a selected projection, said movable contact members having magnetic engagement with said stationary contact members for releasably retaining said movable members in predetermined relation to the projections of said annular members;

' 7, In a control system of the class described, a support, a plurality of annular metal members arranged co-axially on said support in spaced relation and insulated from each other, said members having internal radial projections spaced from each other in relation to time, stationary contact members mounted on said support in spaced relation as to time, each of said stationary contact members extending transversely of said annular members and spaced from said projections, and movable contact members for connecting said stationary contact members individually with a selected projection, said movable contact members having magnetic engagement with said stationary contact members for releasably retaining said movablemembers in predetermined relation to the projections of said annular members, and means for selectively actuating said movable contact members.

8. In a control system of the class described, a plurality of station selector members each having a plurality of electrical contact portions spaced in relation to time, a plurality of stationary contact members common to all of said station selector members and spaced in the same time relation as said contact portions, a plurality of movable contact members each constructed and arranged to electrically connect one of the contact portions of one of said station selector members with the stationary contact members having the same time relation, and means for selectively actuating said movable contact members in one direction comprising a rotary and longitudinally movable member for operatively connecting the same to any one of said movable contact members.

9. In a control system of the class described, a I

plurality of station selector members each having a plurality of electrical contact portions spaced in relation to time, a plurality of stationary contact members common to all of said station selector members and spaced in the same time relation as said contact portions, a plurality of movable contact members each constructed and arranged to electrically connect one of the contact portions of one of said station selector members with the stationary contact members having the same time relation, means for selectively actuating said movable contact members in one direction comprising a rotary and longitudinally movable member for operatively connecting the same to any one of said movable contact members, and means for simultaneously moving a plurality of said movable contact members in another direction.

10. In a control system of the class described, a support, a plurality of annular metal members arranged co-axially on said support in spaced relation and insulated from each other, said members having internal radial projections spaced from each other in relation to time, stationary contact members mounted on said support in spaced relation as to time, each of said stationary contact members extending transversely of said annular members and spaced from said projections, and movable contact members for connecting said stationary contact members individually with a selected projection, and time controlled rotary means for making an electrical connection with said stationary contact members.

11. In a control system of the class described, a support, a plurality of annular metal members arranged co-axially on said support in spaced relation and insulated from each other, said members having internal radial projections spaced from each other in relation to time, stationary contact members mounted on said support in spaced relation as to time, each of said stationary contact members extending transversely of said annular members and spaced from said projections, and movable contact members for connecting said stationary contact members individually with a selected projection, and means for selectively actuating said movable contact

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