US2165483A - Radio apparatus - Google Patents

Description

y 1939- r M. J. HUGGINS 2,165,483

RADIO APPARATUS Original Filed May 13, 1933 2 Sheets-Sheet l avwemtoz 351 1113 Swap raw &

July 11, 1939. M. J. HUGGINS 2,165,483

RADIO APPARATUS Original Filed May 13, 1933 2 Sheets-Sheet 2 vwewboz M-J Ha GG/Ns UNITED STATES PATENT OFFICE RADIO APPARATUS Merion J. Huggins, Upper Saddle River, N. J.

Application May 13, 1933, Serial No. 670,894 Renewed May 8, 1937 23 Claims.

This invention relates to radio tuning or frequency synchronizing means for radio apparatus, and particularly to means to effect the actuation of variable condensers or other frequency synchronizing apparatus to synchronize or tune the circuits of radio receiving apparatus to reso nance with any of a plurality of incoming transmitted r-adio frequencies at and for intervals or periods of time.

It is an object of the invention to provide manually preselected time controlled means to actuate and stop and fasten the tuning means in a multiplicity of selectively predetermined manually preselected positions to tune in the predetermined preselected transmitted frequencies at and for periods of time.

It is an object of the invention to provide means to selectively predetermine and change any one or more of the transmitted frequencies to be manually preselected and time controlled to any other transmitted frequency.

It is an object to provide means connected in circuitwith the tuning actuating means and coacting with the tuning means whereby said tuning means is actuated and stopped and fastened at predetermined manually preselected intervals or periods of time to tune or synchronize the electric circuits of the radio receiving apparatus to resonance with selectively predetermined manually preselected transmitted frequencies at and for periods of time.

It is an object of the invention to provide a type of variable condenser or capacity which is rotated and simultaneously longitudinally reciprocated to and stopped and fastened in a multiplicity of circuit synchronizing positions and thereby spread such detained synchronizing tuning positions over a wide range equalling several hundred degrees or a range exceeding a complete circle.

It is an object of the invention to provide time synchronized circuit closing means wherein the circuits are finally closed by a minute actuated member electrically connected to an hour actuated member and wherein means is provided for momentarily delaying the closing of the circuit by the minute actuated member.

It is an object of the invention to provide means to place the radio receiver in and out of operative condition, as for instance, by closing and opening the electric supply circuit thereto, at and for manually preselected intervals or periods of time.

It is an object of the invention to provide manually operable circuit closing means to effect ac tuation of the means to tune or synchronize the circuits to resonance with transmitted frequencies and to turn the receiver on or off, both independent of the manual preselecting and time controlling means.

It is an object of the invention to provide means co-acting with the tuning means to control and adjust the audio frequency current output or the audio volume or sound level of each manually preselected time controlled synchronized frequency.

In the drawings accompanying and forming a part of this application, Figure l is a View showing in elevation, and partly in section, an embodiment of the component parts of the invention and showing diagrammatically the electrical connections thereof.

Figure 2 is a sectional view taken on the line of Figure 1 looking in the direction of the arrows and showing a modification of the means for selectively determining and changing the tuning positionsof the tuning elements and the transmitted frequencies to be manually preselected and time controlled.

Figure 3 is a sectional View taken on the line 22 of Figure 1 looking in the direction of the arrows.

Figures 4 and are end elevations of condenser elements embodied in the present invention.

In carrying out the embodiment of the invention illustrated in the drawings, there is provided a suitable type of electric motor I with a drive gear 2 on the motor shaft meshing with a driven gear 3 mounted to rotate shaft l which is supported by pillars abcd. Gear 3 is splined to shaft 4 so the shaft may slide or have longitudinal movement therethrough. An adjustable electrode tuning element 5 of a non-conventional type of variable condenser or capacity is fixed to shaft 4 and adapted to have imparted thereto simultaneous rotative and reciprocatory axial movement and thus co-act with a similar stationary electrode tuning element 6 fixedly supported by support 60, and these two elements 5 and 6 interposed in the radio receiving circuit of the radio apparatus, constitute the frequency tuning means.

The tuning elements 5 and 6 are in the form of cup members, each member consisting of a disk having a plurality of concentrically arranged and spaced annularplates 5a and 6a projecting from a face of the disk,and the elements arranged With the plates of one element in opposed relation to the spaces between the plates of the other element so that wnen the ao ustame element is axially adjusted the plates thereof will be interengaged with the plates of the fixed element through the rotation and axial movement of shaft 4 and element 5, and thus effect through capacity change the synchronizing or tuning of the radio receiving circuits to resonance with the radio frequencies.

The hub of movable element is formed as a bevel gear 52) which is in constant mesh with a suitable ratio co-acting bevel gear '1' eccentrically pivoted at 1a and independently supported by the bracket arm lb extended from the shaft supporting pillar c.

The rotation of shaft 4 in either direction imparts a like rotation of movable element 5 and through gear 51) a proportional eccentric rotation of gear 1 which imparts axial movement to tuning element 5, and there is thus simultaneously imparted proportional rotative and axial movement to element 5 and to shaft 4 against the tension of expansion spring 8 disposed under compression between fixed collar 8a and pillar b which spring yieldingly urges shaft 4 and element 5 and the gear 5a longitudinally against gear I thus maintaining gears 5b and l in mesh and the tuning elements 5-6 in the relative position shown in the drawings.

Accordingly, if the ratio of gears 5b and "l are 1 to 2, when the gear 3, shaft and element 5 have been rotated one revolution the eccentrically pivoted gear 7 will have rotated one-half revolution and will have simultaneously imparted the maximum axial movement to element 5 to the left as viewed in the drawing. In other words, by each complete revolution of gear 3 and shaft 4 the element 5 will have been rotatably and longitudinally moved to the left as viewed in the drawing and against the yielding spring 8 sufficiently to effect a complete intermeshing of its plates 50 with the plates 6a of the fixed electrode 6. If the rotation of gear 3, shaft 4 and element 5 is continued or reversed another complete revolution gear 7 will rotate another half revolution and through the coaction of spring 8 and gear 1 impart a simultaneous proportional axial movement to the right as viewed in the drawing sufficient to again completely move the plates 5a and 60: out of interengaged relation and return the tuning elements to the position shown in the drawing.

Thus if the ratio of gears 5b and l is l to 2, each complete revolution of gear 3 and shaft 4 will impart rotative and axial movement to the movable element 5 and effect the complete intermeshing and un-meshing of the plates of the tuning elements 5 and 6, and the tuning of the radio frequency circuits by this combined rotative and axial movement in the adjustment of the tuning elements to a plurality of stable tuning positions is thus spread out over some 360 degrees rather than over a radius of some 180 degrees as with all conventional types of tuning condensers, and thus if the gear 3 has 360 teeth the tuning elements can be positioned in any one of 360 tuning positions. Also, if the ratio of gears 5b and l is 1 to 4 it will require two revolutions of gear 3, shaft 4 and movable element 5 to effect a complete intermeshing or un-meshing of the plates 5afia of the elements 56, and if the gear 3 has a relative number of teeth the tuning elements can be positioned in any of 720 tuning positions. By thus providing for the spreading out of the tuning positions the detaining means will more accurately detain the tuning means in me correct synchronizing position and greatly increase the number of broadcast frequencies which can be synchronized and accurately detained.

It will be apparent that instead of fixing movable element 5 to shaft 4 and moving or reciprocating the shaft longitudinally, shaft 4 could be fixed and element 5 movable longitudinally thereof by splining element 5 to shaft 4, and under this arrangement element 5 is rotated with shaft 6 and the eccentrically pivoted gear 1 would impart proportional reciprocal axial movement to element 5 only against a spring 8, but such an arrangement would require an eccentrically pivoted gear for each movable element 5, and where a gang of condensers are used it appears more expedient to fix all movable elements to the shaft for rotative movement and utilize one eccentrically pivoted gear to impart the reciprocatory axial movement to the shaft and therethrough to the movable elements.

To arrest and fasten the motor I and adjustable tuning element with its blades in adjusted positions for periods of time in any of a multiplicity of intermeshed circuit synchronizing positions with the blades of element 6, or in any of a multiplicity of stable selectively predetermined manually preselected time controlled frequency tuning positions, there is provided a latch bar El pivoted at 9a and yieldingly urged by a spring 973 into engagement, for intervals of time, with any one of the multiplicity of tooth notches of a toothed wheel, in the present instance the driven gear 3, and this latch bar 9 is adapted to be disengaged and retained out of engagementwith any one of said tooth notches, for short intervals of time, by the electric energization of an electromagnet ii], and the latch bar 9 is further adapted to simultaneously make electrical contact with a contact member II and thereby close the electrical circuit to and through the actuating motor I for like short intervals or periods of time.

To selectively determine and automatically effect the arrest and fastening of the motor and the corresponding and correct interengaging of the plates of element 5 with the plates of element t to effect different frequency synchronizing positions, and the fastening thereof in any of a multiplicity of such correct circuit synchronizing positions to synchronize the radio receiving circuits to resonance with any one of a plurality of broadcast frequencies for intervals or periods of time, and to coordinate the electrical energization of motor I and latch bar magnet ll], there is provided adjustable frequency selecting and changing means, comprising a cylinder l2 of conducting material having a nonconducting space, herein shown as a member l6 of dielectric material inserted in the peripheral wall of and extending longitudinally of the cylinder l2, and a plurality of adjustably mounted metal contact makers, two of which contact makers I l, [5 are shown, said contact makers being adjustably stepped about the cylinder l2 so they are arranged to contact with the cylinder 2 and close an electric circuit through one of said contact makers and the cylinder and at predetermined points in the rotation of co-ordinated movement of the cylinder contact with the single non-conducting space arranged in the periphery of the cylinder and break the electrical contact of each of said contact makers with the cylinder l2. An electric conductor brush l3 mounted on a dielectric support w is in constant contact 7 and electric connection with the cylinder. The cylinder 12 is insulated from and splined to the shaft 4, or otherwise arranged to have movement imparted thereto in co-ordinated unison with the motor or driven gear 3, adjustable element 5 and gear 1.

Each of the brushes l4 and I5 is mounted on an independent and selectively adjustable annular supports l1 and I8 of dielectric material, so that each contact brush can be independently and selectively adjusted around the periphery of the metal cylinder 12 and relative to a single circuit breaking element or non-conducting space, and shown as a dielectric insert IE to a position relatively corresponding to any one of the tooth spaces in driven gear 3, which adjustment also selectively predetermines the opening of the motor circuit and the arresting and fastening, for a period of time, of the tuning element 5 in any one of a multiplicity of circuit synchronizing resonance positions, and which adjustment also selectively predetermines the broadcast frequency a .gear tooth space shall represent and also selectively predetermines the broadcast frequency to be manually preselected and time controlled.

The dielectric adjustable brush supports I'||8 are supported in fixed spaced relation to each other and the brushes I4-l5 mounted thereon are supported in fixed adjusted relation to the periphery of cylinder l2 and non-conducting space dielectric insert or single circuit breaking element I 8 by means of a stationary support I9 provided with a shoulder 19a, a spacing block l9b between the rings Il--l8 and a clamp block I90, the whole adapted to be tightly clamped together by the screw |9cZ and thus secure the rings I'll8 and the brushes I 4l5 in correct spaced and selectively predetermined adjusted relation to the dielectric insert or single circuit breaking element Hi.

In Figure 2 the adjustable brush supports l'|l8 are likewise supported in spaced relation in a stationary support l9, but in this instance the periphery of the supports Ill8 are provided with worm gear teeth so the metal brushes l4--| 5 mounted on rings I1-l8 may be adjusted around the periphery of cylinder l2 and relative to nonconducting space dielectric insert or single circuit breaking element l6 by means of the manually operable Worm gear 20 disposed in support IS in engagement with the gear teeth Ila of the supports |'|--I8. By thus manually rotating either of the rings i'|-|8 in either direction its contact brush is adjusted to any of a multiplicity of positions around the cylinder I2 relative to the non-conducting space dielectric insert or single circuit breaking element I6 which adjustment selectively predetermines the actuation of the tuning electrodes, the circuit synchronizing position of the tuning electrodes, the opening of the motor circuit, the stopped and fastened position of the tuning electrodes and the broadcast frequency to be manually preselected for a period of time. It will be apparent that while the supports |'|--l8 are nominated as of dielectric material they might be of metal suitably insulated from each other and from other current carrying elements.

The selectively operative means for manually preselecting the selectively predetermined broadcast frequencies or closing of the motor circuit and for manually preselecting the receiver on and off control, comprises a plurality of parallel spaced metal bars herein termed frequency selecting bars, two of which bars 2I-22 are shown along with a similar bar 23 herein termed a receiver control bar provided for the manual preselection of the time controlled period at which the receiver will be placed in and out of:

receiving condition or operation by means of suitable apparatus herein-elsewhere set forth. All of said bars 21 -2z -23 are mounted on a dielectric support 24.

Forty-eight parallel spaced metal bars herein.

termed time period selecting bars are provided, of which live, 25-26--21-2829 are shown, all of which are also mounted on the dielectric support 24 in relative spaced relation with but out of electric contact to and intersecting the frequency selecting and receiver control bars 2l22 and bar 23. These forty-eight time period selection bars represent twelve hours of time divided into forty-eight periods of fifteen minutes each, and

the five time bars 25-26--2128-29 shown represent the several fifteen minute periods from ten to eleven oclock inclusive.

The forty-eight time period bars, five of which are shown, are each provided with a series of holes equal in number to the number of frequency selecting bars plus a receiver control bar, three of said series of holes being shown in each of the said five time period bars 25 to 29 and indicated as holes 30, 3|, 32, 33, 34, 35, 36, 31,

33, 39, 40, 4I,- 42, 43, 44, and each of said holes;

in a time period selecting bar registering with a like hole provided in each of the underlying frequency selecting bars, as in bars 2|, 22, and receiver control bar 23, and the holes in the time period selecting bars and the registering holes,-

not shown, in the underlying bars 2|, 22, 23 are adapted to receive manual selecting conductor plugs of metal, as 45, electrically connect any of the forty-eight time period selecting bars with any of the frequency selecting bars and thus,

manually preselect any selectively predetermined broadcast frequency for any period of time, and also manually preselect the turning of the receiver on and off at the beginning and ending of any selected period of time.

A plurality of electro-magnetic current controlling relays are provided, one for each of the frequency selecting bars and the receiver control bar, three of which relays are shown, one for each of the frequency selecting bars 21-22 and.

one for the time control bar 23. Each relay comprises electro-magnets 464l 48 and a yielding armature 49-50-5l, and each electrically connected in circuit with a frequency selecting bar 2l-22 and bar 23 by conductors 43a, 41a, 48a, and all the yielding metal armatures 49, 50, 5| are mounted on a common electric cur rent conducting metal support 52.

It will now be apparent that a particular frequency selecting bar, or all of any number of apparent that the so predetermined broadcast frequency of any one or more frequency selecting bars can be changed to any other broadcast frequency by selectively adjusting the position of any one or more contact brushes |4l5 relative to the dielectric insert I6, and thus the multiplicity of manually preselected time controlled tuning or synchronizing positions of the tuning elements 5-6 and the stopping and fastening thereof for periods of time can be selectively predetermined and altered according to expediency or preference by selectively adjusting one or more contact brushes I4-I5 relative to the single dielectric insert or single circuit breaking element I6, which adjustment effects predetermination of the opening of the motor circuit, the setting of the tuning elements 5-6 and the stopping and fastening thereof and the predetermination of the frequency to be manually preselected and time controlled.

The means provided for placing the radio receiver in and out of operating or receiving condition, or for turning the receiver on and off at preselected time controlled periods comprises a pair of electrically insulated resilient metal conductor strips 53-54 adapted to be actuated into and out of electrical contact by a cam wheel 55 which is step rotated by a pawl 56 cooperating with a ratchet wheel 51 on cam 55, which pawl 56 is reciprocally actuated by a like actuation of the pivoted armature 58 by the electromagnet 59 and spring 60, the armature 58 and pawl 56 being yieldingly held in the position shown by spring 60.

The means provided for controlling the output volume or audio tone level in conformity with the signal strength of the various broadcast frequencies comprises an arm 6| pivoted at 6Ia in sliding contact with a resistance unit 62 and adapted to be moved to various positions relative to the resistance unit by being reciprocated by the co-action of spring 63 and cam 64 formed out of a projecting flange on cylinder I2. The output volume may be thereby controlled either by varying the filament temperature or the grid bias potential of the radio receiver through adjusting a suitable resistance 62, or by de-tuning the circuits by actuating a suitable capacity.

The means for time controlling the rotative and axial movement of the movable element 5 to a multiplicity of selectively predetermined frequency tuning positions at and for preselected periods of time comprises a suitable spring or electrically driven time-clock mechanism 65 adapted to bring the tip 66a of resilient material fixed to and extending from an hour driven element or arm 66 into successive electric connection with each one of the forty-eight time period bars, such as 2I, 22, 23, through the successive electrical contact of said resilient tip with each one of forty-eight circularly arranged and spaced metal contact pins 61 mounted in a dielectric support 68. These forty-eight pins represent the forty-eight time period bars and the dividing of twelve hours of time into forty-eight fifteen minute periods of time. Each of these forty-eight pins is electrically connected to an individual time period selecting bar, and thereby made an integral electrical conducting part of the time period selecting bars, five of these pins 61a, 61b, 61c, 61d, B'Ie being shown electrically connected by conductors 250-, 26a, 21a, 28a, 29a to the five time period selecting bars 25, 26, 21, 28, 29, and the said five metal pins so connected represent the several fifteen minute periods from 10 to 11 oclock.

The time clock mechanism 65 is also adapted to bring a resilient tip 69a fixed to and extending from the end of a minute driven element or arm 69 into successive delayed electrical contact with one of four metal pins 70, II, I2, 13

also mounted in an equidistantly spaced about the dielectric support 68. These four metal pins are all electrically connected to a single common conductor I4 and these four pins represent one hour of time divided into four fifteen minute periods.

A contact delaying boss 15 is located adjacent each of the pins I0, H, 12, 13 the purpose of which is for the engagement and detaining or delaying the contact of the tip 69a with the pins in to I3 so that it will pass off a contact delaying boss I5 and snap quickly into electrical contact with each successive pin I0, TI, I2, 13 exactly at the beginning of each fifteen minute period. It will be recognized that by providing that the minute arm only shall make and break the electrical circuit to the current source the period of time the electric current will flow from the source will be much shortened over the time period flow of a contact made by the hour arm, thus effecting a very considerable saving in current.

As has been pointed out, the broadcast frequency and opening of the motor circuit that any or all of the frequency selecting bars 2l-22 represent is determined and may be changed to any other broadcast frequency by a suitable adjustment of the brushes I4I5 relative to the dielectric insert or single circuit breaking element I6 in cylinder I2, and after suitably adjusting said brushes I4I5 so frequency selecting bars 2I-22 represent, say, WJZ and WOR, the operation is as follows:

A conductor plug is inserted in, say, each of the holes 32, 35, 40, 44 in the respective time period selecting bars 25, 26, 21, 28, 29 to electrically connect the respective time period selecting bars with the frequency selecting bars 2I -22 and the receiver control bar 23, and thus manually preselect the broadcast reception from, say, WJZ for the first half hour from 10 to 10:30 oclock, and a succeeding half hour reception from, say, WOR from 10:30 to 11 oclock, and thus preselectively turning on of the receiver at 10 o'clock and the turning off of the receiver at 11 oclock.

Having made the foregoing manual preselections with plugs 45, and with the hour and minute arms 66-69 in the position shown, that is, at exactly the ten oclock position, current will flow from source A along conductors I6'I4 to metal pin I0, contact tip 69a, arm 69, tip 66a, arm 66, pin 61a, conductor 25a to time period control bar 25, through a plug 45 in hole to receiver control bar 23, along conductor 46a, through coil of magnet 46 and conductor 'I'I back to source A. Magnet 46 thus energized attracts armature 49 into electirical contact with metal magnet core 49a whereupon current flows from source A along conductor I8, metal support 52, armature 49, core 49a, conductor 19 through coil of magnet 59 and along conductor 80 back to source A; this flow of current energizes magnet 59 which actuates its armature 58 and pawl 56 to rotate the cam 55 one-eighth turn and effect the electrical contact of the conductor elements 5354 and a flow of electric current into the receiver to place it in operating condition. Simultaneously current will also flow from the time period control bar 25 through a plug in hole 35 to frequency selecting bar 22, conductor 47a, through coil of magnet 47 and along conductor 'I'I back to source A and this flow of current energizes magnet 47 which attracts its armature into electrical contact with metal magnet core 50a, whereupon current fiows from source A along conductor 18, metal support 52, armature 50, core 50a, along conductor 8| to brush l5, through cylinder E2 to brush l3, along conductor 82, through coil of magnet l0, and along conductor 11 back to source A; this flow of current energizes magnet In which magnetically attracts latch bar 9 disengaging it from a tooth notch in gear 3 and electrically connecting it with the member I l, whereupon current will flow from source A through conductor 18, metal support 52, conductor 83, through motor I, and through conductor 84, Contact H, latch bar 9 and conductors 85-11 back to source A; this flow of current energizes motor I and therethrough imparts rotation to gear 3, shaft 4, movable element 5, gear 1, cylinder l2 and cam 64, and more particularly, through the coaction of the eccentrically pivoted gear I imparts rotative and in cooperation with spring 8 reciprocatory axial movement to the element 5 to effect the interengaging of its axial circular plates with like plates on element 6, and this rotative and axial movement will continue until the plates 5a, 6a of the movable and stationary elements 5-6 are in the correct relative position to synchronise the circuits of the radio frequency receiver with the selectively predetermined manually preselected broadcast frequency of WJZ, and at this synchronizing position dielectric insert or single circuit breaking element l5 on cylinder I2 will be positioned under brush l5 and its electrical contact with cylinder l2 Will be broken and the current flow through magnet coil l stopped thus de-energizing magnet Ill and releasing latch bar 9 from electrical contact with member II and break the electrical circuit through motor I and permit the latch bar 9 to engage a tooth notch in gear 3 to stop and fasten the tuning elements and 6 in this particular circuit synchronizing position for a manually preselected period of time. Thus the radio receiver will have been automatically turned on and connected in circuit with a source of electric energy at and for manually preselected periods of time, and the radio receiving circuits automatically synchronized with a selectively predetermined manually preselected broadcast frequency at and for a preselected period of time.

During the interval of time from to 10:30 oclock while the reception of the WJZ broadcast continues, the contact tip 69a of the minute arm 69 will have passed over pin H and at eX- actly 10:30 oclock tip 69a will snap into contact with pin 12, and the hour arm tip 660; will have passed over pin 6'") and at 10:30 will be in contact with pin 67c, whereupon current will again flow from source A along conductors 16-14, through tip 59a, arm 59, arm 66 and tip 65a, pin 51c, conductor Z'la to time selecting bar 21, through a plug 45 in hole 32 to frequency selecting bar 2|, conductor 48a, through coil of magnet 48 and along conductor Tl back to source A; this flow of current energizes magnet 48 which attracts its armature 5| into electrical contact with the metal magnet core 5la whereupon current flows from source A through conductor 18, metal support 52, armature 5i, core 51a and along conductor am to brush l4, through cylinder 12 to brush l3, along conductor 82, through coil of magnet l0 and along conductor ll back to source A; this flow of current again energizes magnet I0 which attracts the latch bar 9 thereby disengaging it from a tooth notch in gear 3 and into electrical contact with member Ii, whereupon current will again flow from source A through conductor 18, metal support 52, conductor 83, through motor I, conductor 84, contact ll, latch bar 9 and conductors 851! back to source A; this flow of current energizes motor I which again imparts rotation to gear 3, shaft 4, movable element 5, gear 1, cylinder 12 and cam 64, and more particularly, through the coaction of the eccentrically pivoted gear 1 and spring 8 imparts both rotative and reciprocatory axial movement to element 5 and effects a change in the interengaged position of its circular plates with the plates of element 6, and this movement to change the interengaged position of said tuning element plates will continue until the plates of movable element 5 are in correct interengaged relation to the plates of stationary element 6 to synchronize the receiver circuits to this second selectively predetermined manually preselected broadcast frequency of WOR, and at this second synchronizing position the dielectric insert or single circuit breaking element I6 on cylinder I2 will be positioned under brush l4 and its electrical contact with cylinder 12 broken and the current flow through magnet I0 stopped thus de-energizing magnet 10 and releasing latch bar 9 from electrical contact with member H and breaking the electric circuit through motor I and permitting the latch bar 9 to engage a tooth notch in gear 3 to stop and fasten the tuning element 5 in this second particular circuit synchronizing position for a preselected period of time. Thus the tuning of the receiver circuits to synchronize with the broadcast radio frequency of, say, WJZ will have been automatically changed at the preselected time of 10:30 oclock to synchronize with the preselected broadcast radio frequency of, say WOR, at and for the succeeding manually preselected period of time.

During the interval of time from 0:30 to 11 oclock while the reception of the WOR broadcast continues the tip 69a of minute arm 59 will have passed over pin 13 and exactly at 11 oclock the tip 6911 will snap into electrical contact again with pin 10 and the tip 66a of the hour arm will have passed over pin 61d and at 11 oclock will be in contact with pin 61c, whereupon current will again flow from source A along conductors l614 to pin 10, tip 69a, arm 69, arm 66, tip 66a, pin 61c, conductor 29a, time bar 29, through a plug 45 in hole 44 to receiver control bar 23, conductor 45a, through coil of magnet 46 and conductor 17 back to source A; this flow of current energizes magnet 46 which attracts its armature 49 into electrical contact with metal magnet core 49a, whereupon current flow from source A along conductor 73, metal support 52, armature 49, core 49a, conductor 19, through coil of magnet 59 and along conductor 80 back to source A; this flow of current again energizes magnet 59 which magnetically actuates its armature 58 and the connected pawl 56 to again rotate cam 55 one-eighth of a revolution and efiect the electrical disconnection of elements 53-54 and discontinue the flow of electricity into the receiver, and thus places the receiver out of operating condition and effects a discontinuance of broadcast radio frequency reception at 11 oclock, or at the expiration of the preselected interval or period of time.

Manually operable electric circuit closing means is provided whereby the radio receiver controlmagnet 59 can be energized and the receiver turned on and off at any time independent of the preselecting and time controlling means, and also whereby the release and motor circuit closing magnet 58 and the electric responsive means (motor I) can be energized and the adjustable electrode actuated to and stopped and fastened in any frequency synchronizing position at any time independent of the adjustable frequency selecting and changing means, the manual .preselecting or the time controlling means, and this manual operable means for the receiver control magnet 59 comprises a manually operable circuit closing device 86 connected with the source A by conductor 81 and with control magnet 59 by conductors 8'ia19 and when this circuit is closed by circuit closer 86 the magnet 59 is energized and actuates armature 58 and pawl 56 to intermittently rotate the cam 55 and alternately close and open the circuit of the operating current source and turn the receiver on or off.

This manually operable means for the releasing and motor circuit closing magnet I also comprises a circuit closing device 88 connected with source A by conductors 88a and 83 and with release magnet In by conductors 88b and 82. When this circuit is closed by device 88 the magnet II) is energized and actuates latch bar 9 to release the adjustable electrode and energize motor I which slowly actuates the electrode to any desired frequency synchronizing position, and when this circuit is opened by device 88 magnet I8 is de-energized, latch bar 9 is actuated to stop and fasten the electrode in such adjusted position and de-energizes motor I until this circuit is again closed by device 88, or until the magnet I8 is energized by a current flow through the adjustable frequency selecting and changing means effected by the functioning of the preselected time controlled circuit at some preselected period of time, when the electrode 5 will be automatically adjusted to a selectively predetermined preselected frequency synchronizing position at and for a preselected period of time or until the devices 86 and 88 may be again actuated.

It will be apparent that the electromagnetic circuit closing relays 46, 41, 48 can be dispensed with and the frequency selecting bars 2 I-22 electrically connected directly with the adjustable brushes l4|5 through conductors BI-Bla respectively and with magnet I!) through brushes Hll5, cylinder I2, brush l3 and conductor 82 to control the energization of magnet I8 and motor I, and that the receiver control bar 23 can be electrically connected directly with the magnet 59 by conductor 19. With these electromagnetic relays thus dispensed with, the minute and hour actuated members of the time synchronized means will be interposed directly in the circuit between the source of current A and the magnet l and magnet 59, and will time control the energization of the magnet ID, the actuation of the latch bar 9 to unfasten the electrode 5 and energize motor I direct and in conformity with the manual preselections, and will also control the energization of magnet 59 to turn the receiver on or off in accordance with manual preselections; and this and other variations may be made within the scope of the invention and portions may be used without others.

Having thus described my invention, I claim:

1. In means for effecting predetermined tuning of the receiving circuits of a radio receiver including at least one tuning element to resonance with transmitted radio frequencies, a motor connected in circuit with a source of electric energy operatively connected with and adapted to adjust the tuning element, means connected in the motor circuit to stop and fasten the tuning element against movement in any direction from adjusted position and close and open the motor circuit and normally urged to motor circuit opening and tuning element holding position, radio frequency selecting means connected in a normally open circuit with a source of electric energy, time controlled circuit closing means connected in and adapted to close the circuit of said frequency selecting means at predetermined selected periods of time, and means connected in circuit with the frequency selecting means rendered active upon the closing of the circuit of the frequency selecting means to actuate the motor circuit closing and opening and tuning element stopping and fastening means to circuit closing and tuning element releasing position and rendered inactive upon the opening of the circuit of the frequency selecting means to permit said means to move to circuit opening and tuning element stopping and fastening position.

2. In means for effecting predetermined tuning of the circuits of a radio receiver to resonance with transmitted radio frequencies as claimed in claim 1, manually selective means to predeterminedly vary the time of closing the circuit of the frequency selecting means by the time controlled circuit closing means and periods of time the frequency selecting means and tuning element actuating means are rendered'active.

3. In means for effecting predetermined tuning of the circuits of a radio receiver to resonance with transmitted radio frequencies as claimed in claim I, manually selective means to predeterminedly vary the time of closing the circuit of the frequency selecting means by the time controlled circuit closing means and periods of time the frequency selecting means and tuning element actuating means are rendered active, and means connected in the circuit of the radio receiver operative from and by the adjustment of the tuning element to regulate the output of the radio receiver.

l. In means for tuning the receiving circuits of a radio receiver including at least one tuning element to resonance with transmitted radio frequencies, a motor connected in circuit with a source of electric energy operatively connected to and adapted to adjust the tuning element. a member rotatable with the tuning element, means operative in one position to engage said member to stop and fasten the tuning element against movement in any one of a plurality of tuning positions and open the motor circuit and in another position unfasten the tuning element and close the motor circuit, radio frequency selecting means connected in a normally open circuit with a source of electric energy having means con nected in circuit therewith rendered active upon closing the circuit thereof to actuate the means engaging the member rotatable with the tuning element out of engagement therewith to release the tuning element and close the motor circuit and permit said means to engage said member and stop and fasten the tuning element and open the motor circuit when the tuning element has been adjusted to synchronize the radio receiving circuit to resonance with the selected radio frequency, time controlled circuit closing means connected in and adapted to close the circuit of the frequency selecting means at predetermined selected periods of time, and manually operated circuit closing means to render active the means to operate the tuning element stopping and fastening means to tuning element unfastening position and to motor circuit closing position to render the motor active to adjust the tuning element independent of the time controlled circuit closing means.

5. In means for effecting predetermined tuning of the receiving circuits of radio apparatus including at least one tuning element to resonance with transmitted radio frequencies, circuit closing and opening means in the electrical connection of the radio apparatus with its source of electric energy, a motor connected in circuit with a source of electric energy operatively connected with the tuning element to adjust the same, circuit closing and opening means in the motor circuit adapted to stop and fasten the tuning element against movement in adjusted position, frequency selecting means connected in a normally open circuit with the source of electric energy, time controlled circuit closing means connected in and adapted to close the circuit of the frequency selecting means at predetermined selected periods of time, means operative upon the closing of the circuit of the frequency selecting means to actuate the motor circuit closing and opening and tuning element stopping and fastening means to release the tuning element and close the motor circuit to effect actuation of the motor and adjustment of the tuning element to tune the radio receiver circuit to resonance with the selected frequency, means connected in the circuit of the frequency selecting means operative when the tuning element has been adjusted to synchonize the frequency of the radio receiver circuit to resonance with the selected radio frequency to open the circuits of the motor and frequency selecting means, and electromagnetic means to actuate the circuit closing means in the radio receiver circuit connected with the time controlled circuit closing means and rendered active at predetermined periods of time to close and open the radio receiver circuit.

6. In means to effect predetermined tuning of the receiving circuits of radio apparatus to resonance with transmitted radio frequencies, a pair of electrodes connected in the radio receiving circuits each including a disk having concentrically spaced annular plates extended from a face thereof and arranged with the plates of one electrode in opposed relation to the spaces between the plates of the other electrode and one electrode being rotatable and axially adjustable relative to the other to interengage the plates of the electrodes, actuating means to rotate and impart reciprocatory axial movement to the adjustable electrode, selectively settable means adapted to effect adjustment of the adjustable electrode by its actuating means to predetermined positions relative to the fixed electrode and tune the radio receiving circuit of the radio apparatus into resonance with selected radio frequencies, and time controlled means to close the power circuit of the radio apparatus and effect operation of the adjustable electrode actuating means and adjustment of said electrode to tune the receiving circuit of the radio apparatus into resonance with selected radio frequencies at predetermined pe riods of time and open the radio receiving circuit after a selected predetermined period of time.

7. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies, a pair of cup electrodes connected in the circuit of the radio apparatus, one

electrode being fixed and the other electrode supported to be rotated and have reciprocatory axial movement to variably adjust said electrode relative to the fixed electrode, a motor connected in a normally open circuit with a source of electric energy having a gear on the shaft thereof meshing with a driven gear rotatable with and to transmit rotary movement to the adjustable electrode, means to effect reciprocatory axial movement of the adjustable electrode and adjustment thereof relative to the fixed electrode, means constituting a circuit closer connected in the circuit of the motor normally urged to circuit opening position and into engagement with a tooth space of the driven gear to retain the electrode in adjusted position, an electromagnet adapted when energized to release said means from the driven wheel and close the circuit of the motor, a metallic cylinder actuated co-ordinately with the adjustable electrode and having a dielectric insert arranged in the peripheral wall, a contact maker in electrical connection with the elctromagnet contacting with said cylinder, frequency selecting means connected with the electromagnet in open circuit with the source of electric energy including contact makers adapted to contact with the cylinder in predetermined stepped relation about the cylinder and close the circuit of the electromagnet through one of said contact makers and energize the electromagnet to actuate the electrode retaining means to releasing position and close the motor circuit and effect adjustment of the electrode and by contact of said contact maker with the dielectric cylinder insert open the circuit of and de-energize the electromagnet and permit the motor circuit closing and electrode retaining means to assume electrode retaining position and open the motor, time controlled circuit closing means connected in the circuit of the frequency selecting means and adapted to close said circuit through a predetermined stepped contact maker and effect selected adjustment of the adjustable electrode at predetermined periods of time.

8. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies, a pair of cup electrodes connected in the circuit of the radio apparatus, one electrode being fixed and the other electrode supported to be rotated and have reciprocatory axial movement to variably adjust said electrode relative to the fixed electrode, a motor connected in a normally open circuit with a source of electric energy, said motor having a gear on the shaft thereof meshing with a driven gear rotatable with and to transmit rotary movement to the adjustable electrode, means to effect reciprocatory axial adjustment of the adjustable electrode relative to the fixed electrode, a circuit closer connected in the circuit of the motor normally urged to circuit opening position and into engagement with a tooth space of the driven gear to retain the electrode in adjusted position, an electromagnet adapted when energized to release the circuit closer from the drive wheel and close the circuit of the motor, a metallic cylinder actuated co-ordinately with the adjustable electrode and having a dielectric insert arranged in the peripheral wall, a contact maker in electrical connection with the electromagnet contacting with said cylinder, frequency selecting means connected with the electromagnet in open circuit with the source of electric energy including contact makers adapted to contact with the cylinder in predetermined stepped relation about the cylinder and adapted to close the circuit of the electromagnet through one of said contact makers and cylinder and open the circuit by contact of said contact maker with the dielectric cylinder insert, and time controlled means to close the circuit of the frequency selecting means through a predetermined stepped contact maker and thereby effect a selected adjustment of the adjustable electrode at predetermined periods of time.

9. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies, a pair of cup electrodes connected in the circuit of the radio apparatus, one electrode being fixed and the other electrode supported to be rotated and have reciprocatory axial movement to variably adjust said electrode relative to the fixed electrode, a motor connected in a normally open circuit with a source of electric energy having a gear on the shaft thereof meshing a driven gear rotatable with and to transmit rotary movement to the adjustable electrode, means to eifect reciprocatory axial adjustment of the adjustable electrode relative to the fixed electrode, a circuit closer connected in the circuit of the motor normally urged to circuit opening position and into engagement with a tooth space of the driven gear to retain the electrode in adjusted position, an electromagnet adapted when energized to release the circuit closer from the driven wheel and close the circuit of the motor, a metallic cylinder actuated co-ordinately with the adjustable electrode and having a dielectric insert arranged in the peripheral wall, a contact maker in electrical connection with the electromagnet contacting with said cylinder, frequency selecting means connected with the electromagnet in open circuit with the source of electric energy including contact makers to contact with the cylinder in predetermined stepped relation about the cylinder to close the circuit of the electromagnet through one of said contact makers and open the circuit by contacting said contact maker with the dielectric cylinder insert, adjustable supports for said stepped contact makers adapted to variably adjust the contact makers about the cylinder, and selective means to close the circuit of the frequency selecting means through a predetermined stepped contact maker and thereby effect selected adjustment of the adjustable electrode.

10. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies, a pair of cup electrodes connected in the circuit of the radio apparatus, one electrode being fixed and the other electrode supported to be rotated and have reciprocatory axial movement to variably adjust said electrode relative to the fixed electrode, a motor connected in a normally open circuit with a source of electric energy having a gear on the shaft thereof meshing with a driven gear rotatable with and to transmit rotary movement to the adjustable electrode, means to axially adjust the adjustable electrode relative to the fixed electrode, a circuit closer connected in the circuit of the motor normally urged to circuit opening position and into engagement with a tooth space of the driven gear to retain the electrode in adjusted position, an electromagnet adapted when energized to release the circuit closer from the driven wheel and close the circuit of the motor, a metallic cylinder actuated co-ordinately with the adjustable electrode and having a dielectric insert arranged in the peripheral wall, a contact maker in electrical connection with the electromagnet contacting with said cylinder, frequency selecting means connected with the electromagnet in open circuit with the source of electric energy including contact makers to contact with the cylinder in predetermined stepped relation about the cylinder to close the circuit of the electromagnet through one of said contact makers and open the circuit by contacting said contact maker with the dielectric cylinder insert, adjustable supports for said stepped contact makers to variably adjust the contact makers about the cylinder, time controlled means to close the circuit of the frequency selecting means and electromagnet through a predetermined stepped contact maker to energize the electromagnet and close the motor circuit and effect predetermined adjustment of the adjustable electrode and maintain said adjustment for a predetermined period of time, and selective means interposed in the circuit of the time controlled means with the frequency selecting means to vary the period of time of closing the circuit of the frequency selecting means and vary the time of maintaining an adjustment of the adjustable electrode and effecting a further predetermined adjustment of the same.

11. Means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies as claimed in claim 8, wherein the electrodes each embody a disk having concentrically spaced plates extended from a face thereof with the plates of one electrode arranged in opposed relation to the spaces between the plates of the other electrode, and the means to impart reciprocatory axial movement to the adjustable electrode comprises an eccentrially supported gear meshing with a gear rotatable co-ordinately with the adjustable electrode to transmit axial movement to the electrode in one direction, and a spring co-acting with said eccentric gear to transmit axial movement to the electrode in the opposite direction.

12. Means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies as claimed in claim 8, wherein the circuit closer connected in the motor circuit and engaging a tooth space of the driven gear to hold the adjustable electrode against movement, comprises a pivoted detent pawl connected with the source of electric energy, a spring to urge the pawl into engagement with a tooth space of the driven gear, and the energizing of the electromagnet in circuit with the frequency selecting means attracting said pawl out of engagement with the tooth space of said gear and a contact terminal actuated by said pawl into electrical contact with a contact terminal connected in the motor circuit to close the circuit of the motor with the source of electric energy.

13. In means to tune the receiving circuits of radio receiving apparatus including at least one tuning element to resonance with radio frequencies, a motor adapted to adjust the tuning element connected in circuit with a source of electric energy, a circuit closer in the motor circuit normally urged to circuit opening position, means to operate said circuit closer and stop and fasten the tuning element in adjusted position against movement in any direction and normally urged to tuning element stopping and fastening position, frequency selecting means connected in open circuit with a source of electric energy comprising a single conductor member arranged with a circuit breaking element and actuated co-ordinately with the tuning element, and a plurality of contact makers in contact with and adjustable on said conductor member relative to the circuit breaking element and the circuit breaking element being common to all of the contact makers, selectively operable means to close the circuit of the frequency selecting means through any one of said contact makers and the conductor member and said circuit adapted to be opened by the contact maker through which the circuit is closed contacting the circuit breaking element, magnetic means connected in circuit with the frequency selecting means rendered active upon the closing of a circuit through any one of said contact makers and the conductor member by the selectively operable means to actuate the tuning element stopping and fastening means to close the motor circuit, and said magnetic means rendered inactive to permit said circuit closer to assume its circuit opening position and the fastening means to assume its tuning element stopping and fastening position when the circuit of the frequency selecting means is opened by the contact maker through which the circuit is closed contacting the circuit breaking element.

14. Means to tune the receiving circuits of radio apparatus to resonance with transmitted frequencies as claimed in claim 13, wherein the frequency selecting means comprises a single electric conductor member arranged with a single circuit breaking element and actuated co-ordinately with the tuning element and electric contact makers adapted to contact with said conductor member and adjustable relative to the circuit breaking element, a series of electric conducting members in electric connection with the contact makers and one of said members in electrical connection with a circuit closer in the power circuit of the radio apparatus, a second series of electric conducting members disposed non-conductively adjacent the first series of conducting members and each of said members adapted to be periodically electrically connected with the source of electric energy through a circuit closing element of the time controlled circuit closing means, and manually adjustable means to selectively electrically connect and vary the connection of one series of conducting members with the other series of conducting members to effect tuning of the circuit of the radio receiving apparatus to resonance with different radio frequencies and actuation of the power circuit closer at different predetermined periods of time.

15. Means to tune the receiving circuits of radio apparatus to resonance with transmitted frequencies as claimed in claim 13, wherein the frequency selecting means comprises a single electric eonduetor member actuated co-ordinately with the adjustable tuning element and arranged with a single circuit breaking element and electric contact makers contacting with said conducting member and adjustable relative to the single circuit breaking element, a series of electric conducting members in electric connection with the contact makers and one of said members in electric connection with a controlling device in the radio receiver power circuit, a second series of electric conducting members disposed non-conductively adjacent the-first series of conducting members in electrical connection with the contact makers and the conducting member connected with the power circuit controlling device and each connectable with the source of electric energy through the time controlled circuit closing means to effect tuning of the circuits of the radio receiving apparatus to resonance with different radio frequencies and actuate the power circuit controlling device to turn the radio receiver power circuit on and off at predetermined periods of time.

16. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies as claimed in claim 13, wherein the frequency selecting means has associated therewith means to preselect periods of time comprising a series of conductor bars, each representative of a predetermined frequency and period of time and each electrically connected with the time controlled circuit closing means, and manually selective means to change the connection of said conductor bars with the time controlled circuit closing means to change the periods of time to close the circuit of the frequency selecting means and tuning of the radio receiving circuit and periods of time of closing and opening the circuit of the radio apparatus.

1'7. Means to tune the receiving circuits of radio apparatus to resonance with transmitted frequencies as claimed in claim 13, wherein the frequency selecting means comprises a single electric conducting member arranged with a single circuit breaking element and operative co-ordinately with the adjustable tuning element, co-acting electric contact makers contacting with said conducting member and adjustable relative to the circuit breaking element, a series of perforated members each in electric connection with a contact maker and each representative of a frequency predetermined by the adjustment of its associated contact maker, a second series of perforated conductor members extending transversely of and out of electric contact with the first series of conductor members and with the perforations in register with the perforations in the first series of conductor members and each representing a period of time and connectable with a circuit closing member of the time controlled circuit closing means, and conductor members adapted to be plugged into said registered perforations to predeterminedly electrically connect the conductor members and thereby the frequency selecting means with the time controlled circuit closing means.

18. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies, a pair of electrodes connected in the circuits of the radio receiver, one of which electrodes is fixed and the other adjustable relative thereto to tune the radio receiving circuits to resonance with different radio frequencies, a motor connected in a normally open circuit with a source of electric energy adapted to adjust the adjustable electrode relative to the fixed electrode, means to close the motor circuit and stop and fasten the adjustable electrode against movement in adjusted position, radio frequency selecting means connected in a normally open circuit with the source of electric energy and having means connected in circuit therewith rendered active upon the closing of the circuit of the frequency selecting means to actuate the electrode stopping and fastening means out of electrode fastening position and close the motor circuit and open the motor circuit and permit the electrode stopping and fastening means to assume electrode stopping and fastening position after the adjustable electrode has been adjusted to synchronize the radio receiving circuit to resonance with the selected frequency, and time controlled circuit closing means connected in and adapted to close and open the circuit of said frequency selecting means and effect adjustment of the adjustable electrode at predetermined periods of time.

19. In means to tune the receiving circuits of radio apparatus to resonance with transmitted radio frequencies as claimed in claim 1'7, and means connected in the receiving circuit of the radio apparatus controlled from and by the adjustment of the adjustable electrode to control the audio output in accordance with the synchronized radio frequencies, comprising a resistance element connected in the receiving circuit, a pivoted conductor connected in the receiving circuit in contact with and movable relative to said resistance element to vary the current supply to elements of the radio receiving apparatus, a cam participating in the rotation and axial adjustment of the adjustable electrode cooperating with said electrode to variably adjust the same to connect in or out out of the radio receiving circuit variable amounts of the resistance element.

20. In a radio signal receiving system having at least one tuning element, a motor operatively connected with the tuning element connected in circuit with a source of electricity and having a circuit closer interposed in the circuit thereof normally urged to circuit opening position, fre-'] quency selecting means connected in open circuit with a source of electricity comprising a conductor member operative co-ordinately with the tuning element and having a dielectric insert and a series of contact makers to contact with the conductor member in stepped relation to the dielectric insert and to have adjustment relative to each other and the dielectric insert, selectively operative means to close the circuit of the frequency selecting means through any one of said contact makers and the conductor member and said circuit adapted to be opened by the contact maker through which the circuit is closed contacting the dielectric insert, said selectively operative means including resilient electrically connected hour and minute actuated members of electric conducting material, a series of insulated conductor members selectively connectable in circuit with the contact makers of the frequency selecting means and with which conductor members the hour actuated member is adapted to successively contact, a second series of conductor members connected with a source of electric energy and with which conductor members the minute actuated member is adapted to successively contact, and means to momentarily delay the contacting of the minute actuated member with said latter conducting members, and electromagnetically operated means connected in circuit with the conductor member and contact makers of the frequency selecting means rendered active to actuate the circuit closer to close the motor circuit upon the closing of a circuit through any one of said contact makers and the conductor member of the frequency selecting means by the selectively operative means, and said electromagnetically operated means rendered inactive to permit said circuit closer to assume its circuit opening position when the circuit of the frequency selecting means is opened by the contact maker through which the circuit is closed contacting the dielectric insert.

21. In a radio signal receiving system having at least one tuning element, electromagnetically actuated means operatively connected with the tuning element and connected in a normally open circuit with a source of electricity, a conductor member operative co-ordinately with the tuning element and arranged with a circuit breaking element, a series of contact makers contacting with said conductor member in stepped relation to each other and the circuit breaking element, and selectively operative means to close the motor circuit through either one of said contact makers and conductor member, and said circuit adapted to be opened by the contact maker through which the circuit is closed contacting with the circuit breaking element of the conductor member, said selectively operative means including time controlled means comprising a clock driven mechanism having electrically connected hour and minute actuated members of conducting material having a contact making tip of resilient material fixed to and extending therefrom, a circular row of insulated conductor pins electrically connected with the frequency selecting means and with which pins the resilient tip of the hour actuated member is adapted to contact, a second series of pins with which the resilient tip of the minute actuated member is adapted to contact, and abutments adjacent the second series of pins for engagement of the resilient tip of the minute actuated member to effect a flexing and quick release fahd contacting of said tip with the pins.

'22. In a radio signal receiving system having at east one tuning element, a motor to adjust the tuning element connected in a normally open circuit with a source of electricity, means to stop and fasten the tuning element against movement in any direction from adjusted position, means including a conductor member arranged with a circuit breaking element and a plurality of contacts contacting the conductor member connected in a local circuit to control the closing of the motor circuit and releasing of the stopping and fastening means from the tuning element and determine the operation of the motor and adjustment of the tuning element, settable time controlled means to close and include a desired one of said contacts in an operating circuit and render means active to actuate the tuning element stopping and fastening means to unfasten the tuning element and close the motor circuit, effect predetermined operation of the motor and adjustment of the tuning element, and after saidpredetermined operation of the motor open the motor circuit and permit the tuning element stopping and fastening means to assume tuning element stopping and fastening position and after a predetermined period of time open the radio receiver circuit,

and said time controlled means including means for the momentary delay of each periodic circuit closing means manually operable at will independently of the time controlled means to close an electric circuit to render the actuating means for the stopping and fastening means active to actuate said means to unfasten the tuning element and close the motor circuit and operation of the motor and adjustment of the tuning element to non-predetermined positions and close the radio receiver power circuit, and means operative at will to actuate the circuit closer of the power circuit of the radio receiver to open and close said power circuit at non-predetermined periods of time.

23. In means to tune the receiving circuits of radio apparatusjincluding at least one tuning element to synchronism with radio frequencies, an electric motor connected in a normally open circuit with a source of electric energy and contion and motor circuit opening position, frequency upon the closing of a circuit through a desired one of the contacts of the frequency selecting means to release the stopping and fastening means from the tuning element and close the motor circuit and effect operation of the motor to adjust the tuning element, and said means rendered inactive to permit said locking means to assume position to stop and fasten the tuning element against movement and open the motorv circuit when the contact through which the circult is closed contacts the non-conducting space of the conductor member.

MERION J. HUGGINS.

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