US2228969A

US2228969A - Automatic radio control

Info

Publication number: US2228969A
Application number: US281474A
Authority: US
Inventors: Roy P Osborn; Leroy D Hemman
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-06-27
Filing date: 1939-06-27
Publication date: 1941-01-14
Anticipated expiration: 1958-01-14

Description

1941- R. P. OSBORN ErAL 2,223,969

AUTOMATIC RADIO 'CONTROL Filed June 27, 1939 -2 Sheets-Sheet 1 a v .86 I

jrwwrvlio'm I arm Patented Jan. 14, 1941 r I I r I 2,228,969 QUTQMATIC RADIO CONTROL Roy P. Osborn and Leroy D. Hemman, Laveen, Aria.- Application June 2'1, 1939', Serial No. 281,474

' 9 Claims. (01. 161-1).

This invention relates to a device for. 'autoand modifications as define no material departure matically controlling a radio. j from the salient Ieatm'es of the invention as An object of the invention is the provision of expressed in the appended claims.

a device which may be either incorporated in a In the drawings:

radio, or which may be'attached to a radio, the: Figure 1 is atragmentary irontview in elevation UNITED STATES PATENT OFF-ICE device being capable of being set for automatically. of the radio time control constructed according to 5 timing infany one of a number of stations com the principles of our invention, I secutively and at predetermined times and for Figure 2 is a view in elevation of arts broken cutting oil? the radio after a particular broadcast away showing the movable belt for a ding in con-' has terminated, means employed in connectrolling the closing of a plurality of circuits. 10

tion with the clock mechanism for adiustingthe Figure 3 is a plan view partly in section of the timing mechanism and for resetting the clock radio control.

mechanism and the timing mechanism. Figure 4 is a transverse vertical section taken another obectot the invention is the provision along the line 4-4 of Figure 1.

5 of a device for automatically tuning in a, par- Figure 5 is a vertical section taken along the ticular station at a predetermined timein which a line -5-5 of Figure 4. h belt having slits or other indicators moves over the Figured is a transverse vertical section taken dial in cooperation with a second belt having along the line 6-'-6 of Figure 5. 1 means thereon to close a circuit to one of a plu- Figu e 7 is a fragmentary vertical section rality of solenoids that in turn control the opera-' through the operating gears shown in'-Figure 4. 20 tion of the usual push buttons for' automatic Figure 8 is a front .view of Figure 7 showing the tuning or the mechanism connected to the buttons, timer arrangement. I the circuit to' the solenoids of magnets being Figure 9 shows m or le s d r mm tically closed by a timing mechanism operated in conthe circuits employed in connection with the radio junction-with the mechanism for causing movecontrol. v

ment of the belt. Figure 10 is a vertical section of a push button A iurther object of the invention is the proconstruction S o in vision of a device for automatically turning in and Figure-1i shows more or less diagrammatically a cutting on a particular station at a predetermined modifled form oi the radio control.

time, the timing mechanism being provided for Referring more particularly to the drawings, I0 30 the purpose in which a timer cooperates with designatesahousing which may be independent or other elements for closing a circuit to solenoids or the radio which is to be automatically controlled magnets which operate the usual push buttons or by the mechanism contained therein, or the nua mechanism attached thereto of a well known meral Ill may represent the front panel or a 3 automatic tuning, the timer being so constructed casing of a radio when the control mechanism that every fifteen minutes it will close the circuit isbuilt directly into the radio and forming part for the period of time necessary to operate the of'the chassis. In either event the front panel tuning mechanism and then leaves the circuit open of the housing or casing is provided with an tor the remainder of the fifteen minute period, a illuminated section II which-is graduated to indi- 40 plurality of discs being operated for causing .a, cate fifteen minute periods throughout the duraswitch arm to contact with a switch element on a' tion of twelve hours and this twelve hour period 'moving belt, each disc being marked to represent may represent either the 'forenoon or afternoon. t i t ti 50 t t h th proper it h The section Il may be formed of glass. or some contacts a switch arm controlling the tuning cirtransparent material having op u li s.

cuit for'a particular mu t t ti n ill a to- At the rear of the section or window I l is placed 45 matically come in, each discrepresenting a-period an annular belt I! which is mounted on drums of fifteen minutes so that when more than one l3 and The d ll is driven y a v lly disc is operated the time period may be increased disposed shaft l5 (Figs. 4 and '1) while the drum l3 amordinglm Y is secured to the vertically disposed shaft I6 10- The invention will be best understood from a cated in spaced rela with the d v s a t I5. to

consideration of the ioliowing detailed description, Suit bl are. provided for the shafts in view of the accompanyin drawings forming a and one of these hearings is shown at ll (Fig. 1). part of the specification. nevertheless, it is to'be Each of the drums is provided with a plurality of understood that the invention is not confined to teeth It at the opposite ends thereof and these the disclosure, being susceptible of such changes teeth are adapted to engage perforations" in the 55 belt l2 so that when the drumifl is revolved the belt will be moved in the direction indicated by the arrow in Figure 3 and the idler'drum i3 is then revolved by the belt.

The shaft I5 is driven by a gear 20 and this gear is driven by a bevel gear 2| rotatably mounted on a shaft 22 and a gear 23 meshing with the gear 2| is driven by a shaft 24. The last-mentioned shaft is rotated by a clock mechanism generally indicated at 25 and this clock mechanism is of the usual electric type well known in the arts.

A belt I 2a having the edges perforated similarly to the belt I2 is trained on the drum l4 and drums 3a and Ma are driven simultaneously with the belt l2 by the drum l4. One face of the belt |2a moves always in close association with the inner face of the panel III for a purpose which will be presently explained.

Collars 26 and 21 are located on opposite sides of the gear 2| and are secured to the shaft 22 so that when said shaft is shifted, the gear 2| will be moved out of mesh with the gear 20 for a purpose which will be presently explained.

A bevel gear 36 ,(Fig. 7) is rotatably mounted upon a sleeve 3| which is secured to a bracket 32 and this bracket is secured in any approved manner to the bottom of the housing I. The gear 30 is provided with a hub portion 33 which is engaged by a collar 34 on the sleeve 3| while the inner face of the gear is engaged by the bracket 32 for maintaining the gear in a predetermined position on the shaft 22. The collar 3| is held stationary as is the gear 30 when the shaft 22 is reciprocated.

At the outer face of the hub portion 33 of the gear 30 is formed a series of teeth 35 and a plurality of teeth 36 is formed on a collar 31 which is secured to an intermediate portion of the shaft 22 and the teeth 36 are adapted to engage the teeth 35 so that when the shaft is rotated manually towards the right by a knob 38 the gear 30 may be revolved in one direction. However, if the knob 38 were revolved in the opposite direction the teeth 36 would slide over the teeth 35 and thus prevent rotation of the gear '30. A coil spring 39 embraces the

shaft teeth

35 and 36 and forces the shaft in the direction indicated by the arrow in Fig. 7 for maintaining the two' groups of teeth out of engagement while maintaining the gear 2| in mesh with the gear 20.

When the knob 38 is moved in the direction indicated by the arrow in Fig. 4 and the

clutch elements

35 and 36 will engage and the knob 38 is revolved towards the right the gear 30 will be revolved as will be the gear 20 for rotating the shaft l5 to move the belts l2 and |2a in a direction for properly setting the belts so that one of the slits 40, 40a, 40b formed in the belt |2a will be properly alined with one of the indicating lines on the dial H. In other words, if the motor 25 would stop by reason of the current being cut of! to the motor, the belts will then stop and it will be necessary to reset the belts to indicate the proper time since the member takes the place of the usual dial of the clock.

'A timer mechanism is shown more particularly.-

' in Figs. 7 and 8 and said timer mechanism consists of a ring 4| which is secured to the hub section 33 of the gear 30. The ring 4| is provided with a cam portion 42 and this cam portion is located outwardly. of a ring gear 43. This ring gear is loosely mounted on the hub 33 and is adapted to be revolved independently of said hub. This ring gear is held in place on the hub by means 22 between the pairs of of the ring 4| and a shoulder 44 which is formed between the hub 33 and the gear 30.

A spring switch arm 50 is secured at 5| to the outer face of the ring. gear 43 and is insulated therefrom as shown at 52. A finger 53a is secured to the spring member 50 and is adapted to ride over the periphery of the ring 4| so that when the cam member 42 engages the finger 53a the A spur gear 55 is secured to a shaft 56 and this shaft as shown in Fig. 3 extends through the front panel of the housing Ill and is provided with a knob 58 located adjacent the knob 38.

It will be found that there are times when the ring gear 43 is so positioned that the cam member 42 will operate the spring arm 5|! out'of synchronism with the movement of the belts l2 and |2a and thus out of synchronism with the timeindicating element represented by a slit 4|lor one of the slits 40a or 40b (Fig. 3).

The belt |2a which as has been explained is provided with a plurality of vertically disposed slits 40, 40a and 49b. Below each slit in said belt are a plurality of spring fingers 60, 6|, 62, 63, and 63a in spaced parallel relation on the belt l2. Each of these fingers extend through the belt and are connected respectively to metal ribbons or

conductors

64, 65, 66, 61 and 61a. These metal ribbonsare secured to the inner face of the belt l2 in spaced parallel relation and are also spaced sufllciently apart so that they will be substantially insulated from each other (Fig. 2).

Figs. 1, 3, 5 and 6 show a plurality of discs 10 located in juxtaposition upon a shaft and to the periphery of each disc is secured a ring I I. It will be noted that the inner portions of the discs are cut away as shown at 12 and the rings are likewise cut off in the same manner. The ring 1| maybe of insulating material, while the discs 10 are formed of a conducting material. An arm 13 extends inwardly from each disc and is of sufficient length so that when each disc is rotated the free end of the arm will move over one of the spring contact fingers 6|! to 63a, inclusive. The arm also is shown in Fig. 6 as being in engagement with the spring finger BI and this ccnnec tion aids in closing a circuit which will be pres ently explained. All of the discs are rotatably mounted upon a. shaft 15 which is secured at is opposite ends by the members 16 and these members are connected to the front panel Illa of the housing It].

The discs are spaced from each other by means of thin spring plates 11 whichare mounted in pairs on the shaft 15 between each pair of the discs 10. The outer bowed faces of the discs are provided with projections l8 which are adapted to engage within pockets 19 formed in the faces of the discs. A key s1ot 80 formed in the shaft 15 is adapted to receive a projection 8| extending inwardly from the inner periphery of the central opening formed in each plate 11. The slot Bland the fingers 8| retain the plates 11 against rotation when the discs 10 are rocked. It will be seen by this construction that each disc 10 may be rocked in opposite directions so that the arm I3 may be placed at various horizontal positions for ment is such in the radio that when one engaging any one of the spring fingers 60 to 68, inclusive.

As shown more particularly in Figs. 4 and 9, the shaft 15 is connected by a wire 54a with the contact 58. A plurality of

brushes

83, 84, 85, 86 and 86a. (Figs. 2 and 3) are fixed in position adjacent the inner front face of the belt l2 and these wipe along the respective ribbons 64 to "a, inclusive. These stationary brushes are respectively connected with

magnets

88, 88, SI, 92 and 83. The magnets are also connected by means of a wire 94 which forms part of the line of a low energy current. A wire '95 is connected to the spring arm 50 (Fig. 9).

A plurality of solenoids 89a, 98a, 930 are employed in connection with a plurality of push buttons B, B, B2, B3 and B4. Each solenoid, as shown more particularly in Fig, 10, has a movable core 96 to which is connected 9. rod 91. A knob 98 of insulating material is connected to the inner free end of the rod beyond the solenoid and is adapted to engage a switchactuating member 980. for one of the switches 89a,'99b, 99c and 99d. The switches 99a to 99d, inclusive, are of the usual type and are adapted tov be pushed in for automatically tuning in a particular station and any number of these buttons may be employed for the purpose. The arrangeswitch is pushed in, any other switch which may have been pushed infor tuning some other station will be released for changing from one station to another. It will be seen that when any one of the solenoids is energized the core 86 will be drawn inwardly so that the member 98 will press against one of the members to close one of the switches for tuning in a particular station. While I have shown five solenoids, it will be appreciated that any number of solenoids with the corresponding number of metal bands 64 to 61 may be employed for the purpose. The switch 89 controls the radio power circuit and operates to open the circuit when pushed inand close the circuit when out. Thus if the radio is of! 'and one of the switches 89a to 89d is pushed in to tune a station, 99 is released and turns on the radio power.

Each of the outer surfaces of the rings II are provided with-a plurality of colored strips as shown in Fig. 6 and as indicated at ill, I02, I83, l, and a dark strip I85. The various colors represent a particular-station which is adapted to be tuned in locally. The black or dark strip I88 will indicate that the radio power is oil! when this strip is located at a horizontal position or in a podtion opposite an indicator I88, Fig. 6, since the arms I3 will be in contact with finger 68c which controls button B and turns oi! the radio power. The indicator III is placed on the panel .lla. On someportion on the dial of the front panel of the housing "is placed constructions in whchveach color is indicated as representing a -cular station in a locality. when theproper color is placed in the horizontal podtion in line with the indicator I86, that particular station will betunedin because the armfliwill engagea spring finger which in connection with the arm 18 closes the circuit to the proper solenoid 88a to "a, inclusive, for operating one of thevmembers 88 as will be presently explained. Referring more particularly to Fig. 9, wires I88 to H8, inclusive, are connected between the respective contacts 83 to 88, inclusive, and respeo' tive solenoids 89 to 88, inclusive; Wires Ill connect these magnets with the wire 84 and wires 84 and!5,ashasbeenexplained,areconnected Bic, 92a and with the low energy current of the radio. Due to the fact that the conductors 64 to 61a must be made of thin material, it is advisable only to use a low current in connection with the conductor. A manually operated switch 5 is employed for opening or closing said low current circuit.

' Wires H6 connect each of the solenoids 90a to 93a with the wire 88 which is directly connected to the solenoid 89a.

Outlet wires lll lead from said solenoid to respective switch points H8. A plurality of switches H9 to I23, inclusive, are operated by the magnets 89 to 93, inclusive, closing a circuit carrying a high energy circuit and represented by the wires 88 and 88a.

The contacts I26 are connected with wires which control the usual mechanism in a radio for bringing in the station automatically.

The operation of my device is as follows: The timing control mechanism may be built directly into the radio whereby the solenoids 90a to 93a, inclusive, in connection with the magnets 90 to 93, inclusive, will cause a station to be brought in at predetermined times and be maintained in operation for a predetermined time when one or more of the members 10 are properly positioned whereby the arm I3 will be engaged by one of the movable contacts Gli to 63, inclusive. It will be appreciated that the timing mechanism is operating continuously as a clock whether the radio has been turned on or off by the usual switch for the purpose.

The station is first selected and then one of the members 10 is rocked until one of the colored sections IM to I04 inclusive, isaligned with the indicator I06 on the dial. The member-10 which is operated must be one which will bring in that particular station at a particular moment and which is opposite one of the graduations on the dial I I. Thus where it is desired to bring a station in at three o'clock the member 10 (Fig. 1) which is adjacent the numeral 3 on the dial il,iis

rocked to,the proper position. One of the movable contacts 60 to 63a engages the arm 13 shortly before the beginning of the selected fifteen minute period and remains in contact'for a short time after. At exactly the beginning of this period the The belt lIa has one portion always movable in close. association with the face of the dial H so 'that the slit ll, Ila or 48b will be passing over the dial in synchronism with the clock mechanism for indicating the time of the day. Since the dial II shows the hours from 1 to 12, in-. elusive, two slits l8 and 48a. are provided in the belt Ila and these slits are located at 180 apart so that when one slit moves away from the dial lithe other slit will appear. Thus it will be seen that the operator of the radio can readily set said radio to bring in any predetermined station at a definite time by an inspection of the dial II and one of the slits l8 or-lla through which a light shines and these rays also pass through the. transparent dial ll.

In the event that the slit 40 does not properly align with one or the indicators on the dial, as

so that the group of elements and 36 will be engaged while the gear 2! is moved out of engagement with the gear at. The knob 38 is then revolved towards the right and the belts i2 and I2a are moved through the medium of the gears 20 and 333 until the slit 49 reaches the proper indication on the dial i i for indicating the time of the day.

The knob is then released and the spring 39 will force the knob and the shaft 22 outwardly whereby the gear ill will be forced into mesh with the gears 23 and 28 and the belts will then be moved.

Each one of the arms I3 when properly set will be engaged by one of the respective spring contacts 6b to 63, inclusive, slightly before the time for operating one of the respective magnets 90 to 93, inclusive, and the respective solenoids 90a. to 93a but the circuit to a solenoid or magnet is not closed because the cam member 42 will retain the spring arm upwardly and therefore the contacts 53 and 5 3 will be open because the member 53 is riding on the cam 42. When the member 53 slides off. the cam member 42 a circuit will be closed through the

contacts

53 and 54 and arms II and one of the spring members 60 to 63, inclusive. The current will then pass through the proper brush 83 to 85, inclusive, for placing one of the magnets 90 to 93, inclusive, in operation.

The cam member ii is continuously revolved by the gear 33 and makes a complete revolution every fifteen minutes so that the current will be cut on and off at each fifteen minute period.

In the event that the cam member does not open or close the circuit directly at the end of each period, the knob 58 in front of the panel may be revolved to change the position of the cam 42 by the medium of the shaft 56 and the intermeshing gears 55 and 43. The direction in which the knob 58 is revolved will depend upon whether a cam opens and closes the switch too soon or too late.

Referring more particularly to Fig. 9, it will be seen that the switch II5 must be closed in order that current will pass

through'the wires

94 and 95 to the respective contacts 5|, 54, the shaft 15 as well as the arm 13. One of the switch members 60 to 63, inclusive, and the respective wires connect the contacts 83 to 86, inclusive, with one of the respective magnets 90 to 83, inclusive.

When the magnet M is energized the switch I20 will be closed and current from the wires '8 and 88a will pass through the solenoid 90a and the armature of this solenoid will act upon the member 9911, bridging the contacts I26, and these contacts, as has been stated, are connected with the usual operating mechanism (not shown) which tunesin a station automatically.

It is to be borne in mind that current flows through magnet 90 and solenoid 90a for onlya brief period at each fiteen-minute interval.

Any one of the buttons BI to B4, inclusive, may be operated manually to bring in a station when desired. However, where several stations have been set at diiferent intervals of time, the current to the various solenoids which controls the tuning in of such stations will be cut on automatically.

Springs 96a simply restore the solenoid armatures to normal position.

This type of mechanism is common to radios where automatic tuning. is employed and it is believed that no description is necessary.

On the other hand where it is desired to main-- tain the radio ofi for a certain period of time one of the discs 10 is so set that it will engage the spring contact 63a on the belt I2. When this happens the solenoid 89a is energized and the member 99 will be moved out of engagement with the contacts I 28. However, the magnet 89 will first be energized to close the switch US so that the circuit to the solenoid 8911 will be closed and this circuit includes the wires 88 and 83a. The contacts I28 are connected to the radio circuit and since the switch 99 has been opened by the energizing of the solenoid $90; against the tension of the spring I21, the radio will remain inoperative.

When the device is made a part of the set, no switch other than switch 99 would be necessary for turning the radio 01? or on. In order to turn the radio on manually, one of the buttons B to B inclusive must be pushed in when the switch 99 will snap out and close the circuit to the-radio and the selected station will be tuned in when the correct operating disks have been set.

Referring more particularly to Fig. 11 it will be seen that a modified form of the arrangement illustrated in Fig. 9 is provided and instead of the timing mechanism being embodied in the radio as a unit, as has been described in connection with Fig. 9, the timing mechanism and all of the operating parts are enclosed in a separate housing I36 and this housing is adapted to be moved in close association with the front panel lob of the radio having automatic tuning so that plungers I3I to I 34, inclusive, may be aligned with the usual push buttons I35 to I38, inclusive, and the housing then is secured in any approved manner in operative relation of the front panel of the radio so that when the knobs I39 to I42, inclusive, are operated the members I3I .to I31; which are associated with knobs I35 to I38 are forced inwardly for automatically tuning in a. predetermined station.

All those parts which are common to the system shown in Fig. 9 will have the same numerals except the solenoids I43 to I48, inclusive. However, the

wires

94 and 95 which are connected to the low energy current of the radio are all combined in a cable. Provision must be made for connecting these wires to the proper circuit in the radio as has been explained in connection with Fig. 9. Wires 88 and 88a are also included in a cable together with the various branch wires. Provision must be made for connecting the ends of these wires to the high energy current of the radio. For this purpose the usual plug-in sockets are used.

In this type of device, a pair of magnets I and I5I are installed within the housing I30 for operating a. switch I 52 for bridging a pair of contacts I53 and I54 which are connected to the usual radio supply as represented by the wires I55 and I56. These wires form part of the circuit which is connected to the house current and the switch I52 in this event will take the place of the ordinary switch for turning on or oi! the radio.

A magnet I operates a switch iii which is adapted to engage a contact I52. The contact I62 is connected by a wire I53 with the magnet I50 and a wire in! leads from this magnet to the negative side of the radio.

A wire I65 connects the switch ISI with wire 88.

The wire I 66 connects the magnet 150 with the the wire 88a. while a wire I59 connects the con tact 86a with the magnet I68.

70 The magnets 90 to 93, inclusive, together with their respective switches I20 to I23 operate in a similar manner to the magnets and the switches shown in Fig. 9 and the wiring connections are identical.

when it is desired to tune in a station a knob (not shown) for operating the switch I52 is actuated for moving the switch I52 so that the usual house current completes the circuit to the radio. Any one ofthe knobs I39 to I42 may be pushed inwardly to operate one of the buttons I35 to I38,. inclusive, and the proper discs ID are then moved to bring in the desired station and the number of discs operated will determine the period of time that the station will be maintained in operation.

When it is desired to have the radio remain idle for a period of time it is only necessary to rock one of the members so that the arm I3 will engage the movable contacts 63a. when this happens the relay or magnet I60 will be energized so that current will pass through the wires I63 and I whereby the relay I50 will be energized and the switch I52 will be opened. The timer, however, continues to operate every fifteen minutes but as long as the arm I13 is engaged by the movable contact 63a then no stations will come in.

When, however, certain of the discs III are set for bringing in a station and one of the buttons I39 to I42 is pushed inwardly, the relay I5I will be brought into play, since the various contacts I'III associated with the contacts "I are simultaneously closed by one of the switches I20 to I23 and the switch I52 is closed for controlling the main circuit of the radio connected with the house current.

Referring more particularly to Fig. 8, it will I be seen that the timer may be advanced immediately after the contacts close due to the particular construction of the member 53a and the free end 42a of the cam 42. If it be found that the mechanism is changing stations after the actual change in program occurs, then the member 43 is rotated in the same direction as the direction of rotation of the cam and assumes the position shown in Fig; 8. On the next revolution the contacts will close earlier.

It will be appreciated that instead or one cam, as shown, a number of cams may be employed on the same ring and spaced at equal distances apart. Thus it will be seen that where two cams are employed, these cams will be located 180 apart.

We claim:

-1. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids; means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one sided a line of an electric current source,

a spring finger connected to each conductor, a

prisingan plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one or 'the spring fingers when the connected discs are rocked, a time controlled'switch, means for opening and closing the switch periodically, means electrically connecting one element of the switchwith the discs, and means connecting the'other' .element of the switch with the source of current to complete the circuit.

2. An automatic timing device for radios combelt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids, means electrically each solenoid with a corresponding brush, a wire connecting each solenoid withone side of alias of an electric current source,

belt, means for operating thea spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element of the switch with the source of current to complete the circuit, and means for properly positioning the switch relative to the opening and closing means for the switch.

3. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids, means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one side of a line of an electric current source, a spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the pathof one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element of the switch with the source of current to complete the circuit, a second endless belt driven by the operating means for the first belt,

an elongated clock dial associated with the sec-v ond belt and means on the second belt and movable over the dial for indicating the time of day.

4. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a

- brush for each conductor, a plurality of solenoids,

means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one side of a line of an electric currentsource, a spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element or the switch with the source or current to complete the circuit, a second endless belt driven .by the operating means for the first belt,

an elongated clock dial associated with the sec- 0nd beltand means on the second belt and movable over thewdial forindicatingthe time of day,

the dial having graduations representing periods 01' a predetermined number of minutes, there being a disc for each graduation.

5. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a.

brush for each conductor, a pluralityot solenoids, means electrically connecting-each solenoid with a corresponding brush, axwire connecting each solenoid with one sided a line otan electric current source, a spring finger connected to eachswitch with the discs, means connecting the other element of the switch with the source oi current to complete the circuit, a second endless belt driven by the operating means for the first belt, an elongated clock dial associated with the second belt and means on the second belt and movable over the dial for indicating the time of clay, means for manually moving thesecond belt independently of the operating means for properly positioning the indicating means on the second belt relative to a particular graduation on the dial.

6. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids, means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one side of a line of an electric current source, a spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element of the switch with the source of current to complete the circuit, a second endless belt driven by the operating means for the first belt, an elongated dial having graduations indicating periods or time and associated with the second belt, indicating means on the second belt adapted to aline successively with the graduations to designate the time of day, there being a disc for each graduation.

7. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids, means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one side of a line of an electric current source, a spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element of the switch with the source of current to complete the circuit, a second endless belt driven by the operating means for the first belt, an elongated dial having graduations indicating periods of time and associated with the second belt, indicating means on the second belt adapted to aline successively with the graduations to designate the time of day, there being a dial for each graduation, and means for manually moving the second belt to properly position the indicating means for designating the time of day.

8. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids, means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one side of a line of an electric current source, a spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element of the-switch with the source of current to complete the circuit, a second endless belt driven by the operating means for the first belt, an elongated clock dial having graduations indicating uniformly fractions of the hour, there being a disc for each fraction, the second belt having spaced slits through which the graduations appear, one slit moving over the face of the dial at one time and disclosing the time of the day.

9. An automatic tuning device for radios comprising an endless belt, means for operating the belt, spaced conductors carried by the belt, a brush for each conductor, a plurality of solenoids, means electrically connecting each solenoid with a corresponding brush, a wire connecting each solenoid with one side of a line of an electric current source, a spring finger connected to each conductor, a plurality of juxtaposed rockable discs, each disc having a contact arm, one or more of the arms adapted to be moved into the path of one of the spring fingers when the connected discs are rocked, a time controlled switch, means for opening and closing the switch periodically, means electrically connecting one element of the switch with the discs, means connecting the other element of the switch with the source of current to complete the circuit, a second endless belt driven by the operating means for the first belt, an elongated clock dial having graduations indicating uniformly fractions of the hour, there being a disc for each fraction, the second belt having spaced slits through which the graduations appear, one slit moving over the face of the dial at one time and disclosing the time of day, said series of the spring fingers being located adjacent each slit.

LEROY D. HEMMAN. ROY P. 'OSBORN.