US2075809A

US2075809A - Control apparatus for radio receiving sets

Info

Publication number: US2075809A
Application number: US687217A
Authority: US
Inventors: Robert B Foster
Original assignee: JOHN B SMILEY
Current assignee: JOHN B SMILEY
Priority date: 1933-08-28
Filing date: 1933-08-28
Publication date: 1937-04-06
Anticipated expiration: 1954-04-06

Description

3 Sheets-Shget l April 6, 1937. R. B. FOSTER CONTROL APPARATUS FOP. RADIO RECEIVING SETS Filed Aug. 28, 1955 April 6, 1937; B FOSTER 2,075,809

CONTROL APPARATUS FOR RADIO RECEIVING SETS Filed Aug. 28, 1935 3 Sheets-Sheet 2 April 6, 1937.

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N 0% a! I I l 5 Sheets$heet 5 Patented Apr. 6, 1937 UNITED STATES CONTROL APPARATUS FOR RADIO litllSSllEll RECEIVING SETS Robert B. Foster, Los An'geles, Calif., assignor to John B. Smiley, Los Angeles, Calif.

MAY 2 8 1940 Application August 28, 1933, Serial No. 687,217

8 Claims.

This invention relates to radio and television receiving apparatus, and relates more particularly to an automatic control for a radio or television receiving set.

It is a general .object of the present invention to provide a simple, practical and inexpensive automatic tuning control for radio and/or,tele vision receiving sets.

It is another object of the invention to provide an automatic control for a receiving set that is operable to automatically change or adjust the receiving set to any selected tuning of innumerable broadcaststations within the range of reception of the receiving set and for any selected time of the. day.

It is another object of the invention to provide a control for a radio or television receiving set that is operable to automatically and accurately tune the receiving set to receive the broadcasts of any radio broadcasting station within its range of reception regardless of the location of the receiving set with respect to the broadcasting stations.

It is another object of the invention to provide ,25 an automatic control for a radio or television -It is another object of the invention to provide a simple and automatic control of the character 30 mentioned that is operable to automatically change the tuning of the receiving set without causing the receiving set to make undesirable noises, and without aifecting the subsequent proper and eflicient operation of the set.

35 It is a further object of the invention to provide an automatic control of the character mentioned that may be used in connection with radio and television receiving sets of various types and characters and that does not require the alteration or modification of the principal operative parts of the receiving set.

Other objects and features of the invention will be best and more fully understood from the following detailed description of a. typical form 45 and application of theinvention, throughout which description reference is had-to the accompanying drawings, in which:

Fig. 1 is a vertical detailed sectional view of the control provided by the present invention 50 embodied in or used in connection with a typical radio receiving set. Fig. 2 is a transverse detailed sectional view taken substantially as indicated by line Ie-2 on Fig. 1. Fig. 3 is an enlarged fragmentary detailed sectional view of the 55 cooperating Tcontact elements of the selective tuning control means. Fig. 4 is an enlarged side elevation of the contact plate of the selective tuning control means, being a view taken substantially as indicated by line 44 on Fig. 1. Fig. 5 is an enlarged front or face elevation of 5' the disc member in the selective tuning control means, being a view taken substantially as indicated by line 5-5 on Fig. 1. Fig. 6 is an exterior elevation view of the jack panel, being a view taken as indicated by line 6-6 on Fig. 1. Fig. 7 10 is an enlarged vertical detailed sectional view taken substantially as indicated by line 'l--'| on Fig. 1, illustrating the contact ring and wipe contact of the selective timing control means, and Fig. 8 is a diagrammatic wiring diagram of the 15 circuits andassociated parts of the control.

The automatic control provided by the invention may be embodied in the form of an attachment or appliance to be used on a previously manufactured radio or television receiving set 20 vention, I will describe a typical preferred form of control that may be considered as embodied in a typical radio receiving set as initially constructed. It is to be understood that the invention is not to be construed as limited or restricted to the specific form or application about to be described, but that it is to be taken as including any features or modifications that may fall within the scope of theclaims.

The portion of the typical radio receiving set illustrated in the drawings, includes a case. or

cabinet l0 having a horizontal internal partition the condensers C and with suitable numerals ii at spaced marks M. In the particular case illustrated in the drawings, the marks I4 and the numerals ii are arbitrary iridicia to indicate the various settings or adjustments of the condenser shaft I 2, there being one hundred and one marks I 4 designated by the numerals l5 as zero (0) to one hundred (100). It is to be noted that the control provided by the present invention may be embodied in a form for use in connection with a receiving set having a condenser shaft dial bearing marks and numerals to indicate the wave other markings and calibrations. The speaker or sound reproducing unit it of the receiving set is attached to the under side of the shelf 5 l in a suitable manner. The typical or usual manual means (not shown) for operating or controlling the condenser shaft i2 may be embodied in the apparatus and is adapted to be used to tune the set when the control of the present invention is disconnected or idle. The usual control switch Y (Fig. 8) is provided in one of the incoming leads of the energizing circuit Z of the set. The various other parts and elements of the receiving set have not been illustrated in the drawings and will not be described, as such disclosure is not essential to the complete understanding of the invention.

The automatic control provided by the invention includes generally a power means or actuating means iii, an operative drive l9 between the actuating means [8 and the condenser shaft I2,

an energizing circuit 26 for the actuating means it, and a control for the energizing circuit 26 comprising a selective time control means 2|, and a selective tuning control means 22 related to the time control means 2i to cause energization of the power means l8 for any one of a plurality of different periods and at any one of a plurality of difierent intervals to turn the condenser shaft l2 and provide for any selected tuning of the receiving set.

The power means or actuating means 18 is provided to operate or oscillate the condenser shaft i2 of the receiving set.- In the preferred form of the invention, the actuating means 18 is in the nature of a comparatively small electric motor 23. The motor 23 is illustrated as hung or attache-d to the under side of the shelf 1 I within the cabinet it. The motor 23 is preferably of a type in which the inertia or momentum of its moving parts does not cause "coasting or continued rotation of the motor shaft after the energizing circuit of the motor has been broken or opened.

The operative drive l9 between the actuating means l8 and the condenser shaft I2 is operable to cause relatively slow oscillation or turning of the shaft l2 through arcs or partial rotations of substantially the same extent as that of the movable plates of the condensers C. The drive l9 includes a speed reduction gear 24 preferably in the form of a worm reduction gear mechanism operated by the shaft of the motor 23. The reduction gear 24 drives a relatively small pulley 25. A larger pulley 26 is carried by a shaft suspended from the shelf II by a hanger 27. A suitable belt 28 operates over the

spaced pulleys

25 and 26. A vertical rod 29 slidably passes through a bearing or guide 30 in an opening of the shelf H and has its lower end at the pulley 26. A head or plate is provided on the lower end of the rod 29 and has a transverse slot 3|. A crank pin or eccentric pin 32 is provided on the pulley 26 and operates in the slot 3!. The operative connection or drive 19 includes a horizontal shaft 33 in the upper portion of the cabinet IU. The shaft 33 is supported by a suitable post or bracket Hand is in axial alignment with the condenser shaft 12. Rack teeth 35 are pro vided on the upper portion of the rod 29 and c0- operate with the teeth of a pinion 36 on the shaft 33. It will be apparent how rotation of the pulley 26 causes vertical reciprocation of the rod 29 and turning or oscillation of the shaft 33.

lengths of the broadcasts received or bearing In accordance with the invention, the automatic control may be disconnected from the other parts of the receiving set when desired so that the adjustment or tuning of the set may be entirely manual. The operative drive or connection l9 between the actuating means 58 and the condenser shaft l2 includes a releasable clutch A for connecting the shafts l2 and 33. The particular clutch A illustrated in the drawings includes a sleeve 31 slidable on the forward end portion of the shaft i2. Opposing parallel plates 38 are attached to the adjacent ends of the shafts i2 and 33 and have pairs of openings 39.

and 40 adapted to come into longitudinal alignment. The openings 39 are closer to the axis of rotation of the shafts l2 and 13 than the openings 49. Pins M are provided on pivoted bell cranks or levers 42 and are adapted to extend through the registering

openings

39 and 40 to connect the shafts l2 and 33 for rotation. Links 43 operatively connect the levers 42 with the sleeve 37. A suitable manual operating member 44 projects into the cabinet and has a yoked operative connection with the sleeve 31. It will be apparent how the member 44 may be operated to move the pins 4| into and out of the openings 39 and 49. As the pairs of

openings

39 and 40 are at different distances from the axis of rotation, the clutch A can only be engaged when the shafts l2 and I3 are in the same respective rotative positions. When it is desired to engage the clutch A, the shaft I2 is turned by the usual manual adjusting or tuning means of the receiving set and the operating member 44 is engaged to urge the pins 4| into clutching operation. Upon the shaft I2 being turned to a particular position with respect to the shaft 33. the pins 4| are free to engage in the openings 39 and 46.

The energizing circuit 20 for the motor 23 is adapted to be connected with any suitable source of electrical energy, for example, it may be connected with a domestic electric supply or source. In the drawings, the circuit 20 is shown as including two leads 50 and 5| connected to the incoming leads of the main circuit Z of the receiving set. The circuit 20 is under the control of the selective time control means 2! as will be subsequently described, so that it is normally open, and so that it is automatically closed when the selective time control means 2i is related to the selective tuning means 22 to provide for the changing of the setting or tuning of the receiving set at a specific or selected time. A switch B is provided in the circuit 20 and is under the control of the selective timing control means and selective tuning means. The switch B may be provided in the lead 50 and may include a stationary contact 52 and a shiftable contact 53 adapted to cooperate with the contact 52. The shiftable contact 53 is connected with or carried by a pivoted armature or keeper 54 to be operated as will be subsequently described.

The control for the energizing circuit 20 of the operating means I8 is operable to close the switch B for a definite period at any selected time to cause a selected or pre-determined turning of the condenser shaft l2 and thereby bring about a selected tuning of the receiving set. In accordance with the invention, the control for the switch B includes the selective time control means 2| operable to close the switch B at any one of a plurality of definitely related time intervals throughout the day under the control of the selective tuning'means 22. Means 22 may motor.

' in the notches 6|.

be selectively set to automatically govern the duration of a given energization of the motor 23 to result in a pre-determined or' selected movement of the condenser shaft l2. It is a feature of the invention that the selective time control means 2| and the selective tuning means 22 are each independently manually adjustable or capable of selective manual setting, and are corelated to provide for the automatic tuning of the radio receiving set to receive and reproduce the broadcasting of any particular broadcasting station for any desired period of the day.

The selective timing means or selective time control means 2| includes a chronometer or clock 56. The clock 56 is preferably an electric clock involving or driven by a synchronous electric The clock |5 may be attached to a side 5101 the cabinet l0 and is preferably positioned so that its face is set in or is visible through an opening in a panel 58 on the exterior of the cabinet side 51. The clock 56 has the usual face or dial 66 and hands (not shown). In accordance with the invention, the time control means 2| 4 includes a ring 59 of insulating material arranged between the face or dial 60 of the clock 56 and the body or housing of the clock. The ring 59 is concentric with the hand operating shafts of the clock 56 and is provided with a plurality of circumferentially spaced internal notches 6|. The notches 6| are equally spaced and bear a definite relation to the indicia of the clock dial, for example, the notches 6| may be in the same rotative positions as the fifteen minute markings of the dial of the clock. In the particular case illustrated in the drawings, there are 48 notches 6| on the inner side of the ring 59, one notch 6| for each one-quarter hour of a day. The notches 6| preferably have inwardly divergent walls and grooves 62 are provided in an end of the ring 59 to join the notches 6|. Conductors 63 are passed or wrapped around the ring 59 and are electrically connected with posts or contacts 64 which pass through the grooves 62 to have exposed ends It is to be understood that there is one conductor 63 for each contact 64.

While the ring 59 may be provided with any desired number of notches 6| and contacts 64, the broadcasts or programs of radio broadcasting stations usually are for one-quarter hour periods or multiples thereof, and therefore I have dis-- closed the selective time control means 2| as being operable to cause energization of the motor 23 at any of the fifteen minute. periods of the day. An arm 65 is provided on the hour-hand of the clock 56 and carries a brush or wipe con-- tact 66 for successively cooperating with the contacts 64. The contact'66 is flexible and is related *to the notches GI and contacts 64 so that it suddenly snaps into engagement with a contact upon entering a notch 6| and suddenly snaps out of engagement with the contact upon leaving the notch.

The invention includes a control circuit D, one

7 lead 61 of which is electrically connected with the contact arm 65 and is therefore successively electrically connected with the several contacts '64 of the ring 59. The other lead 680i the circuit D extends from a suitable transformer 69 for converting the usual alternate current to direct current. The control circuit D is operable to close the switch B in the energizing circuit 26. An electro-magnetic coil 10 is connected in the circuit D and is adapted to act upon or shift the armature 54 to close the switch B. The con trol circuit D is closed or completed only when the time control means 2| and the tuning control 22 are set or adjusted to-provide for a change in the tuning of the receiving set at a definite time.

The automatic time control means 2| includes a multiplicity of jacks arranged in openings in the panel 58. In the case where there are fortyeight contacts 64 on the ring 59, there are fortyeight jacks 1| provided in the panel 56, there being one jack electrically connected with each contact 64. The conductors 63 extend from the ring 59 to the panel 58 to electrically connect the contacts 64 with the jacks H. The jacks H are preferably arranged in a definite relationship or order, for example, they may be arranged in spaced rows. In the particular arrangement illus trated in the drawings, there are twelve vertical rows of jacks H, each row having four jacks. The vertical rows of jacks II are headed by the numerals 1 to 12, indicating the twelve hours of the day and the lower horizontal rows of horizontally aligned jacks H are headed by the

numerals

15, 30 and 45 to indicate the fifteen minute divisions of each of the hours. The jacks 1| are adapted to receive plugs of the shiftable or portable conductors that may be selectively connected in the tuning control means 22 as will be subsequently described, to complete the control circuit D.

It is an important feature of the invention that the control is operable to de-energize or break the energizing circuit of the sound reproducing unit or speaker |6 during the automatic adjusting or tuning of the receiving set. A stationary contact i3 is provided in the circuit E of the speaker at a point spaced from the contact 52 of the switch B. The keeper or armature 54 carries a contact 14 for cooperating with or engaging the contact 13. The contact I4 is electrically connected in the circuit E and is normally held in engagement with the contact 13 by a spring I5 holding the armature 54 in its down or unactuated position. parent that when the control circuit D is closed or completed that the energizing circuit E of the speaker I6 is opened simultaneously with the closing of the energizing circuit 20 of the actuating means l8.

The selective tuning means or tuning control 22 may be manually adjusted or set to provide for the tuning of the receiving set to receive the broadcast from any radio broadcasting station within the range of reception of the receiving set and is related to the time control means 2| to provide for the tuning of the receiving set at any time of the day to receive any specific broadcast. The tuning control means 22 includes a disc 86 provided on the forward end of the shaft 33. The disc 86 is preferably electrically grounded to the chassis 6f the apparatus in a suitable manner. In accordance with the invention, the disc 60 has a smooth flat outer face in which is set or embedded a flush member iii of insulating material. The member 6| of insulating material is radially disposed in the face of the disc 86 and extends inwardly from the periphery of the disc. A stationary disc or plate 82 is mounted on the inner side of the panel 58 in spaced parallel relation to the outer surface of the disc iii. A multiplicity of spaced axial openings 63 is provided in the plate 62. In the particular form of the invention being described, there is an opening 83 for each marking M of the dial on the condenser shaft I2. The openings 83 are circumferentially and radially spaced within a band or area of 180 extent. The band or area in which the openings 83 are provided is of approximately the same radial extent as the insulation member 851. Ball contacts M are provided in the outer ends of the openings 85s and are adapted to cooperate with the outer face of the disc 80. Springs 85 may be provided in the openings 83 to normally yieldingly urge the balls 8 outwardly into contact with the disc 8%. Leads 86 are electrically connected with the ball contact through the springs and extend outwardly through radial grooves 6i to the periphery of the plate 82. nected with a conductor 88. The several conductors 88 extend to and are electrically connected with jacks 39 provided in spaced openings in the panel .58. In order to simplify the disclosure in figure I have reduced the number of conductors G3 and 38, it being understood that there is one conductor 63 for each contact and one conductor SE for each contact M The one hundred and one sockets or jacks 8% are preferably arranged in a definite order, for

' example, they may be arranged in vertical and horizontal rows in the panel 58 and the panel is provided with numerals adjacent the jacks to designate the jacks as corresponding to specific rotative settings of the condenser shaft it, that is, to correspond to the settings of the con densers C as designated by the calibrations or marks it of the condenser shaft dial. It is to be understood that the jacks 89 are electrically connected with the contacts il in proper relation with respect to the rotative positions of the disc 8E? and condenser shaft ii.

The invention includes removable or portable conductors 98 adapted to be plugged in or electrically connected with the jacks l5 and the jacks 89. There is preferably a plurality of conductors 90 provided or supplied with the control. Plugs iii are provided on the opposite ends of the conductors 96 and are adapted to be plugged into or received by the jacks Ti and 89 to electrically connect with the

conductors

63 and 88 of the respective jacks. When a conductor 98 has one of its plugs 9! in a jack 89, say the jack 89 numbered M, and has the plug on its other end received by a jack li, say the jack ll designated as 6-45, the control circuit D is completed through the said conductor til when the contact 66 comes into engagement with the contact 6 3 located at the point corresponding to six-fifteen o'clock on the clock dial to cause energization of the coil it which closed the switch B to energize the motor 23 and simultaneously breaks the energizing circuit E of the speaker id. The motor 23 turns or oscillates the disc 89 through the drive it until the contact 84 electrically connected with the said jack 89 designated as 3-8 is engaged by the strip 85 of insulation whereupon the control circuit D is broken causing de-energization of the motor 23 and reenergization of the speaker Hi. When this occurs, the condenser shaft i2 will have been turned to a position where the mark M designated as (i l will be at the adjusted position, or in other words, the radio receiving set will be tuned to 4 3- on the dial. The radio receiving set of course continues in operation with the exception of the speaker it so that its tubes remain warm and the operation of the set, that is, the reception of the broadcasts is not affected by the automatic tuning. The receiving set will remain adjusted at any particular tuning until the con- Each lead 86 is electrically conaovaeoe trol circuit D is again completed. It is to be understood that a plurality of conductors 9B may be employed to connect any desired number of jacks 89 with a corresponding number of jacks H to provide for the automatic adjustment or tuning of the receiving set to receive broadcasts of various different broadcasting stations at different times of the'day.

A plurality of sets of inter-connected jacks may be provided in the panel 58. In the particular case illustrated in the drawings, there are three sets of inter-connected jacks 95, one set comprising four jacks, and two sets comprising three jacks. When it is desired to tune in on the broadcast of a particular broadcasting station at different periods through the day, a con- .ductor 9i! may be plugged into the jack 89 corresponding to the setting or tuning of the receiving set to bring in that particular station and may be plugged into one of the inter-connected jacks 95. Other conductors 9&3 may then be plugged into the other jacks 95 of the same set to provide for the tuning of the receiving set to receive the broadcasts of the same station at the desired or selected times of the day.

The invention may include a remote control whereby a person at a point remote from the receiving set may cause energization of the motor 23 and thus automatically turn the condenser shaft it until the set is tuned as desired. The remote control may include conductors H19 adapted to be plugged into jacks H35 in the panel 58. The jacks Hi5 are connected in the energizing circuit 20 by CDIldllCtOlS Hit which bridge the switch B. A manually controllable switch it]? is a'daptedto connect the conductors N10 to complete the circuit 26. It will be apparent how the switch illl may be governed to cause the desired energization of the motor 23 and oscillation of the condenser shaft E2. The circuit 28 may be opened by means of the switch lfll upon the set being tuned as desired. As the switch B is not operated when the switch ID? is closed, the speaker remains in operation so that the operator may tune onto the desired broadcasting station without looking at the dial of the set.

A switch I02 may be provided in the control circuit D to break or open the circuit D when the control is disconnected from the condenser shaft B. In practice the switch I02 may be operatively related to the clutch A so as to be opened when the clutch is disengaged and so as to be closed when the clutch is again engaged. I have shown the switch H02 mounted in a position so that its operating part M3 is operable by the manual operating member M- of the clutch.

The invention includes means for automatically energizing and de-energizing the receiving set at any selected time. A switch M is provided in a conductor or line 5 l8 connected in one of the leads of the circuit Z bridging the control switch Y. A pivoted switch arm Iii is operable to close the switch M. Electromagnetic means are provided to operate the arm iii. Electro-magnetic coils H2 and H3 are arranged at opposite sides of the arm Hi. The coil H2 is operable when energized to pivot the arm Hi and permit the switch M to open, while the coil H3 is operable when energized to pivot the arm ill in the other direction to close the switch M. Springs H5 are connected with the arm Hi to retain the arm in either one of its positions after passing its center of movement, A

common lead H1 extends from the arm III to the transformer 69 and contacts Hli'are provided on the opposite sides of the arm. The coils H2 and H3 have leads connected with contacts H2 and H3 respectively which are adapted to be engaged by the contacts H6. A

conductor I28 extends from a pole of the coil H2 to an off jack I2I in the panel 58. A conductor 90 is adapted to be plugged into any 10 selected jack 'H and the jack I2I to cause momentary energization of the coil H2 at the selected time to provide for opening of the switch M and de-energization of the receiving set. i

5 A conductor I22 extends from 'a pole of the coil H3 to an on jack I23 in the panel 58. A conductor 90 may be plugged into any selected jack -H and the on jack I23 to cause momentary energization of the coil H3 and closing of the switch M at the selected time. As the energizing of the coils H2 and H3 is only momentary and their energizing circuits are broken upon movement of the arm III, the means I9 is not actuated when the switch 25 M is operated. From the above it will be apparent how the switch M may be operated at any selected time to provide for the automatic energizatlon or de-energization of the receiving set. I

30 It is believed that the operation of the control provided by the present invention will be readily understood from the foregoing detailed description. Assuming that the energizing or c0ntrol switch Y or M of the radio receiving set is closed and that the set is in operation, the clutch A may normally be engaged as illustrated in Fig.

l of the drawings so that the shaft I2 is operatively connected with the operating motor 23. One or more conductors 90 may have their plugs 40 9| plugged in the jacks89 and H to provide for the automatic tuning of the receiving set to receive the broadcasts of selected broadcasting stations at selected periods. Assuming that two conductors 90 are connecting jacks II and 89 45 as illustrated in Fig. 6 of the drawings, wherein one conductor 90 is electrically connecting the jack number 44 with the jack H numbered 6-15 and the other conductor 90 is electrically connected with the jack 89 numbered 80 and with 50 the jack "II numbered 6-30. When the sweep or brush contact 68 on the hour shaft of the clock 56 comes into engagement with the contact 64 located in a rotative position corresponding to the mark of six-fifteen oclock on the dial of the clock, the control circuit is completed through the conductor 90 plugged into the jack II so that the switch B is closed and the energizing circuit E of the speaker 15 is broken. Closing of the switch B causes energization of the motor 23 and turning or oscillating of the shafts I2 and 33. The shafts continue to turn until the contact 84 electrically connected with the jack 89 numbered i l is engaged by the strip of insul tion M. The control circuit D is then broken so 65 that the motor 23 is de-energized and the speaker is is "re-energized. The condenser shaft I2 will stop at the setting M so that the radio receiving set will receive the broadcasts from a broadcast ing station logged as 44. The radio receiving To set will remain tuned to the station until the contact snaps into engagement with the contact 84 corresponding in rotative position to the marking six-thirty o'clock whereupon the control circuit D will be completed through the conr ductor 90 plugged into the jack 89 numbered 80,

80 until it is shut oif or disconnected from, its

source of power or until a conductor 90 is plugged into a jack H corresponding to a subsequent time of the day, and a. jack 89.

From the above it will be apparent how the control is operable to automatically adjust or tune the receiving set to receive the broadcasts of any broadcasting station within its range of reception at any time ofday. As the speaker I6 is de-energized during the automatic tuning, the set does not make any undesirable noises; however, the receiving set remains energized during automatic tuning so that its tubes do not cool. The automatic tuning therefore does not in any way affect the subsequent operation of the apparatus. The automatic control is such that it may be disconnected from the condenser shaft I2 at any time, and when thus disconnected the control circuit D is broken so that the speaker I8 cannot possibly be rendered inoperative. The control is particularly simple and inexpensive of manufacture, and is easy to govern and operate.

may appear to those skilled in the art or fall within the scope of the following claims.

Having described my invention, I claim:

1. In a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor, an electrically operated switch in the circuit, a selective time control switch means having spaced contacts, a selective tuning control switch means, comprising a pair of concentric discs, one being stationary and having circumferentially spaced contacts corresponding to graduations on said tuning element and positioned in engagement with the other disc, and the latter disc being operatively connected to said tuning element and having an insulating strip adapted to engage in sequence each of the contacts on the first disc, certain of the contacts on the time control switch being adapted to be selectively connected with certain of the contacts on the first disc, and both of said switch means being connected in series with the first switch, said insulating strip being adapted to engage one at a time the contacts on said disc for breaking the circuit formed by the latter contact with said switch.

2. In a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor. a two-way switch in the circuit, a selective time control switch means having spaced contacts, a selective tuning control switch means, comprising a pair of concentric discs, one being stationary and having circumferentially spaced contacts corresponding to graduations on said tuning element and positioned in engagement with the other disc, and the latter disc being cperatively connected to said tuning element and having an insulating strip adapted to engage in sequence each of the contacts on the first disc, certain of the contacts on the time control switch being adapted to be selectively connected with certain of the contacts on the first disc, and both of said switch means being connected in seris with said two way switch, means associated with both switch means for shifting the two-way switch into one position and completing the motor circuit at a predetermined time for operating the motor a predetermined amount, and a speaker circuit having a loud speaker, said speaker circuit adapted to be completed by the first switch when the latter is shifted in the opposite direction, said speaker circuit being disconnected from a source of electrical energy when the motor circuit is completecl.

3. In a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor, an electrically operated switch in the circuit, a selective time control switch means having spaced contacts, a selective tuning control switch means having spaced contacts corresponding with the tuning element, a switch board having two sets of jacks, one set being fixedly connected to the first contacts, one jack to each of the first contacts, and the other set being fixedly connected to the second contacts, one jacl: to each or" the second contacts, all of said jacks being accessible at all times and means for variously and selectively connecting certain of the jacks of one set with certain of the jacks of the other set, both of said switch means being thereby connected in series with the Lrst switch for operating said motor a predetermined amount at a predetermined time.

a. The combination with a radio receiving set having an energizing circuit, a switch in the circuit, a movable member for the switch, a pair of solenoids, each adapted to force said member in an extreme opposite position for connecting and disconnecting said switch, a pair of contacts, one contact connected with one solenoid and engaged by the member when the latter is attracted by the other solenoid, the other contact connected with the latter solenoid and engageable by the member when attracted by the first solenoid, a selective time control switch having spaced contacts, and means for selectively connecting each of the solenoids to different contacts of the time controlled switch.

5. In a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor, a motor control switch in the circuit, a selective time control switch means having spaced contacts, a selective tuning control switch means comprising a multiplicity of stationary switches spaced to correspond to substantially all station positions of said tuning element, said switches having means in connection therewith and operatively connected to and movable with said tuning element and adapted to open said switches in sequence one at a time, said switches being arranged in rows positioned angularly with respect to the direction of movement of the movable means of said switches, certain of the time control switch contacts being adapted to be selectively connected to certain of the switches of the tuning control switch means, and both switch means being connected in series with said motor control switch, each of said multiplicity of switches being adapted to be opened for breaking the circuit formed by each of said latter switches with the motor switch.

6.111 a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor, a motor control switch in the circuit, a selective time control switch means having spaced contacts, a selective tuning control switch. means comprising a pair of closely positioned plates, one being stationary and having a multiplicity of spaced contacts corresponding to station posi tions of said tuning element and positioned in engagement with the other plate, the latter plate being movable and operatively connected with said tuning element and having an insulating strip adapted to engage in sequence each of the contacts on the first plate, certain of the contacts on the time control switch means being adapted to be selectively connected with certain of the contacts on the first plate, and both of said switch means being connected in series with the motor switch, said insulating strip being adapted to engage one at a time the contacts on said plate for breaking the circuit formed by the latter contact with the motor switch.

7. In a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor, a motor control switch in the circuit, a selective time control switch means having spaced contacts, a selective tuning control switch means comprising a pair of closely positioned plates, one being stationary and having a multiplicity of spaced contacts corresponding to station positions of said tuning element and positioned in engagement with the other plate, the latter plate being movable and operatively connected with said tuning element and having an insulating strip adapted to engage in sequence each of the contacts on the first plate, the contacts of the stationary plate being arranged in rows positioned angularly with respect to the direction of the longitudinal extent of the insulating strip, certain of the contacts on the time control switch means being adapted to be selectively connected with certain of the contacts on the first plate, and both of said switch means being connected in series with the motor switch, said insulating strip being adapted to engage one at a time the contacts on said plate for breaking the circuit formed by the latter contact with the motor switch.

8. In a control apparatus of the class described, a tuning element, an electric motor for operating the same, an electric circuit for the motor, an electrically operated switch in the circuit, a selective time control switch means having spaced contacts, corresponding to time intervals of the time control switch means, and having one jaclr in connection with each contact, a selective tuning control switch means having closely positioned contacts corresponding with the tuning element, a switch board having jacks thereon, each of the latter contacts being fixedly connected to only one of the latter jacks, all jacks being accessible at all times, and means for variously and selectively connecting certain of the first jacks with certain of the second jacks, both or" said switch means being thereby connected. in

series with the first switch for operating said motor a predetermined amount at a predetermined time.

ROBERT B. FOSTER.