US1742147A

US1742147A - Distant control for radio apparatus

Info

Publication number: US1742147A
Application number: US138791A
Authority: US
Inventors: Frederick W Renwick
Original assignee: FREDERICK O PINKERTON; JOHN S LATTA
Current assignee: FREDERICK O PINKERTON; JOHN S LATTA
Priority date: 1926-09-30
Filing date: 1926-09-30
Publication date: 1929-12-31
Anticipated expiration: 1946-12-31

Description

F. w. RENwlcK DISTANT CONTROL FOR RADIO APPARATUS Filed sept. so. 192e 10 snags-sheet 1 Dec. 3l, 1929.

` Dec. 31, 1929.

FW. RENWICK DISTANT COTROL FOR RADIO APPARATUS` 1o sheets-sheet 2 -Fled Sept. 30. 1926 www@ @MM Dec. 31, 1929.l

F. w. RENWICK 1,742,147

DISTANT CONTROL FOR'RADIO APPARATUS Filed' sept. so.` lzs. 1o sheets-sheet 4 lI/III Dec. `3l, 1929. F. w. RENwlcK DISTANT CONTROL FOR RADIO APPARATUS Filed sept. so, 1926 1o sheets-sheet '5A Dec. 3l', 1929.

F. w. RENwlcK 1,742,147

DISTANT CONTROL FOR RADIO APPARATUS Filed Sept. 30. 1926 10 Sheets-Sheet 6 31, 1929-. F. w. Rr-:NwlcK 1,742,147

l ms'rANT CONTROL Foa RADIO APPARATUS Filed Sept. 30. 1926 10 Sheets-Sheet '7 Dec. 31,71929. FQ w. RENWICK DISTANT CONTROL FOR RADIO APPARATUS Filed sept. 5o. 192e 1o sheets-sheet s D150 31 1929- F.w.-RENw1cK 1,742,147

DISTANT coNTRoL Fon RADIo APPARA'rs I Filed Sept; so. 192s 1o sheets-sheet 9 10 Sheets-Sheet lO F. w. RENwlcK Filed sept. 5o. 192e- DISTANT CONTROL FOR RADIO APPARATUS Dec. 3l, 1929.

Patented Dec. 31, 1,929

UNITED, STATES PATENT oFFlci;v

FREDERICK W. RENWICK, 0F CAMDEN, NEW JERSEY, ASSIGNOR OF THREE-IGHTHS TO JOHN S. LATTA AND ONE-FOURTH vIl O FREDERICK 0. PINKERTON, BOTII 0F PHILADELPHIA, PENNSYLVANIA DISTAN T CONTROL FOR RADIO APPARATUS Application led September 30, 1926. Serial No. 138,791.

This invention relates to radio apparatus and has special reference to a remote control for radio receiving sets.

In the present state of the art the tendency isconstantly toward the production of re, ceiving apparatus in cabinets designed as articles of furniture so as to afford an appearance which will not be discordant with the remainder of the furnishings oftheroom wherein the receiving set is located. Naturally such sets do not lend themselves to porta-l bility. Furthermore,v it is rapidly becoming customary to build receivingsets directly into the Awalls of a building so that the set cannot be moved. Again, itis very inconvenient lto move even a set with the common v small cabinet from one place to another in a building owing to the rearrangement of` wiring necessary. --It frequently happlens,

however, that reception is desired in one room room. This may, of course, be effected by con ne( ting the lear phones or loud speaker to the set'by wires of the necessary length and moving that part of the apparatus where desired. This, however, is most inconvenient since it involves the presence of a person in the room with the receiving set to properly manipulate the dials for setting the set to the desired station. In the case of a person confined to bed the receiving .set may even be in the same room and yet be out of reach for setting..

features the principal object ofthe present invention is to provide an improved arrange` t ment of radio receiving set wherein the con- Atrol' of the instruments which require setting to' tune the apparatus to a desired wave length, orf station, may be effected from a more or less remote point. For instance, the set with its batteries may be located in the cellar and the loud speaker and the controlling instrument located in the living room, an invalids room or any other desired'part of the house.`

It is desirable that the person using such a remote control should be enabled to adjust the receiving set to known positions of the tuning elements so that stations which are received in definite positions of such tuning elements may be selected at will. To do this it is necessary that the remote operator should n have'means to determine such positions of the delicacy in'its effect on the tuning element or elements than is aorded by direct manipulation of such tuning elements and it is desirable that rapid approximate setting be capable of being effected.

A third important object of the invention is to provide an improved remote control `for radio receiving sets wherein the controlling A "\v n u means is capable of quickly effecting approximate setting of the tuning element or elements to the desired position and then, with great delicacy, effecting the accurate setting of the desired position.

It is lilfewise necessary 'that movement of the tuning device' be promptly stopped as soon as the desired setting has been reached, as otherwise the -inertia'of moving parts would iv carry the setting beyond that desired. In order to overcomethese objectionable Accordingly a fourth object of the invention is the provision ofv suitable brake mechtive means of the tuner, the brake being autot matically released upon tuning current on the tuner motive means.

'ris

'In most receiving sets there are upper and ing either limit of movement for which'they.

are designed. s

With the above and other objects in view as construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying'drawings like characters of reference indicatelike parts in the several views, and Figure 1 is a plan view of a radio receiving set equipped for remote control in accordance with this invention.

Figure 2 is a front elevation thereof. s Figure 3 is an end view of the receiving set to a somewhat larger scale than the precedingfigures. s

igure 4 is a still further enlarged front view of a art of the mechanism disclosing a certain c utch arrangement and the means for actuating the same as used in connection with this invention. n Y

Figure 5 is a detail section on the line 5--5 of Figure 4.

.Figure 6 is a view from the front of a certain brake mechanism used in connection ,with the invention to stop movement of the tuning element promptly when desired.

Figure 7 is a detail section on the line 7-7 of Figure 4. l

Figure 8 is an enlarged detail section on the line 8 8 of Figure land showing the rheo- `.stat or ohmic resistance which governs the position of the indicator of the remote control device.

Figure 9 is a diametrical section through a worm wheel used herein to drive a'tuning element, the section disclosing thel insulation arrangements whereby the hub :and toothed rim areelectrically separated. g l

Figure 10 is an enlarged front view automatic circuit breaker used herein to open the motor circuit upon the tuning element reaching either limit of its movement.

Figure 11 is a front view ofthe device used at the remote control station and showing` the cables and plug connected thereto.

Figure 12 is a front View of the remote control box with the front of the casing removed. Figure 13 is an enlarged -face view'of a two speed reversing switch contained in the control box.

Figure 14 is a bottom plan view of the switch shown in Figure 13.

Figure 15 is a view similar to Figure 13 but showing the main control switch for opening and closing the motor and filament circuits.

Figure 16 is a bottom plan view of the switch shown in Figure 15.

Figure 17 is an end view of a multiple contact plug used on the cable from the remotecontrol to the receiving set.

ofan

-lin disclosed no attempt is made to show a radiof receiving set in all ofits details nor to A show all of the wiring of such a set, only suilicient of the arts of the set itself being shown and descrlbed to enable the operatlon of the remote control to be understood. In this connection it will be obvious 'from what follows that the operation of the invention 1s not limited to any particular number of tun- -ing elements nor to any particular character -or arrangement thereof. For instance the invention is here show as associated with a receiving set of the well known Freed-Elsemann type employing threeltuning condensers each on a separate `shaft but it will be made plain that the invention is not re- -stricted to condensers for the tuning elements but will apply equally Well with those types of instruments wherein the tuning is effected by variable inductances. Also the invention does not require the use of any particular number of shafts for the tuning elements or number of such elements themselves. In other words, the invention will work equally well with-any type instrumenthaving one :or more movable tuning' elements.

Bearing this in mind the receiving set may be briefly describedas having a base 10 which supports'a casing-11 having a front panel 12, the top of the casing forminof a sur-base 13. Supported from the base 10 by posts 14 is a binding post panel 15 and on the top 13 and panel l5 are mounted the binding posts 16 f for the'co'nnection of the various exterior instrumentalities such as batteries, aerial, "ground and also for the connection of the wires (nine in number as will be hereinafterexplained) which lead to the remote control. All showing of the wiring internally of the set leading from these posts to the-various local or set instrumentalities has been omittedv from the drawings except in the wiring diagram as tending to confusion of the parts.

Mounted on the top 13 is a series of tube sockets 17 and mounted on the panel 12 is a series of tuning elements here shown as variable condensers 18 and being three in number.

.Figure '.18'is ar section onth i 1-8-18 of lFi ure 1-7. J

Each condenser is provided with a shaft 19 which projects forwardly through the front `panel l2. Mounted 011 the projecting end of each of the shafts 19 is a worm wheel of peculiar construction which replaces the ordinary tuning dial generally carried on such shafts.

v the hub by screws 24 passing through a retaining plate 25 and through the inner portionof the disk to engage in threaded openings in the flange 21. Mounted on the periphery of the disk 23 is a rim 26 which has its outer periphery provided with suitable worm wheel teeth and is held in position by a retaining ring 27 secured to the disk 23 by screws 28.v Thus the rim'26 is electrically insulated from the shaft 19.

On the front panel below each shaft 19 and its worm wheel is mounted a pair of guides arranged to hold a vertically slidable double bearing 30 the individual bearings of which are spaced for purposes presently 4to be explained. Below each double bearingv the front j panel supports a bracket 31 whereg through passes a bearing adjusting screw 32 on which the bearing rests, a lock nut 33 being provided on the screw to prevent accidental turning thereof after the bearing has been adjusted. By means of the screws 32 the various bearings may be accurately alined so that they may support the worm shaft 34 without deflection of thelatter. On the shaft 34 is mounted a series of worms 35 each of which is held between the arms ofa respective bearing and engages a respective worm wheel.

`With this arrangement rotation of the shaft 34 will effect rotation of the shafts 19 simultaneously and thus affect the settings of the 4tuning elements synchronously.

Obviously the tuning'elements must be either matched wherein a single dial is used to simultane-` ously setting manually a plurality oftuning element shafts.

The peculiar manner of driving this shaft will now be considered. Extending upwardly from the base 10 are hollow posts 36 wherein is screwed adjusting screws 37 which ysupport the base of a motor 38 of the/reversible type. This motor has the usual binding posts 39 for the connection of suitable motor leads (not shown) leading from appropriate bind ing posts 16. The motor has the usual shaft .40 and the arrangement of this shaft andthe parts immediately associated therewith are best seen in Figure 7. On' the forward end-V of the shaft 40 is mounted a hub 41 having a .flange 42 to which is secured a brake disk43 of insulating material, the disk being held by screws 44 to said flange. A set screw 45 holds the hub on the shaft. Extending upwardly from the base- 10 is a pair of spaced brackets 46 whereon is mounted a double bearing 47 alined with the motor shaft and supporting an extension shaft 48 which is provided between the bearings with a worm 49. Suitable grease cups 50 are provided to lubricate the bearings. One end of this shaft 48 is adjacent but slightly spaced from the end of the shaft 40 Aand on this end is mounted a' hub 51 which is secured to the shaft by a set screw 52. This hub 4is/eXtended to form a casing 53 which extends overthe hub 41 in lspaced relation thereto and is provided with a flange 54 bearing against the insulating disk 43 and Thus. these secured thereto by screws 55. parts form a coupling which connects the' .two

shafts

40 and 48 while leaving them electrically separate.'

As well shown in Figure 6 a horizontal magnet 56 is supported on brackets 57 from the base 10 below the brake disk 43. This magnet is provided with pole pieces 58 which have their upper ends projecting above the magnet. Pivoted to one of'these pole pieces is an armature 59 having'its free end working between arms projecting upwardly from the other pole piece (see Figure 3). Carried by the last mentioned -pole piece is a bracket 60 having a horizontal arm through which extends an adjusting screw 61 provided with a lock nut 62. The upper end of this screw constitutes a seat for the lower end of a helical compression spring 63 forming the brake applying spring. Extending downwardly from beneath the free end. of the armature 59 of' this spring, the tension of which canl be regulated by the screw 61, the armature 5 9 is urged towards the brake disk 43. Mounted on the armature 59 near its pivoted end is a clip 65 by which one end of a brake bar 66 is conncctedto said armature. The free end of this brake bar is provided with arms 67 engaging oppositesides of the armature 59 and this end is also provided with an adjusting screw 68 by means of which this end may be adjustably spaced from the armature, a lock nut 69 being employed to hold the screw in adjusted position. On top of the brake bar is secured a brake shoe 70 engageable with the brake disk 43. With this arrangement energization of the magnet 56 will release the brake and permit free action of the motor but instantly the magnet is de-energized the spring 63 acts to apply the brake and stop the motor. In order to hold the shaft 48 from vibration arising from application and release of the brake,

ice

lis a conical bearing 64 forming the upper j spring seat for the spring 63. Thus, by means or from other causes, a sleeve 71 is revolubly mounted on said shaft and is provided with a circumferential groove 72 in which is engaged an end eye of a tension spring 73 having its remaining end secured to the base 10. Considering now the high and low speed or gear `shifting mechanism as best shown in' Figures' 1, 4 and 5.. The brackets 46 are braced in proper spaced relation by tie bars 74 having threaded ends 75 projecting through the brackets and provided with nuts 76. The twoupper tie bars are connected by a cross bar V77.- Adjacent the upper part of each bracket 46-is a bearing 78, these bearings being alined and supportinga shaft 79 having a squared portion l8O intermediate its ends. Revolubly mounted on the shaft 79 is a sleeve 81 which is provided with a worm gear 82 meshing with the worm 49. By this means the sleeve 81 is driven as the motor revolves. On this sleeve there is also provided a pinion 83 which meshes with a gear 84 on a jack shaft 85 journalled above the shaft 79 in the cross bar 77 and one ofthe brackets 46. Fixed on this jack shaft is also a pinion 86 which meshes with a gear 87 carried by a sleeve 88 revolubly mounted on the shaft 7 9, this sleeve and the sleeve 81 having the squared portion 80 between them. The pinions 83 and 86 with the

gears

84 and 87 constitute a reducing gear train wherein the sleeve 88 travels at a much slower rate than the sleeve 81. On the sleeve 81 is a face clutch member 89 having pin clutch .teeth and on the sleeve 88 is a similar face clutch member 90. Slidably mounted on the squared portion 80 is a double faced clutch member -91 havingpin clutch teeth and so arranged that engagement with either of the

members

89 or 90 frees the other. When this clutch member 91 is engaged with member 89 the shaft' 79 will be driven at high speed while engagement of the

members

91 and 90 will cause slow revolution of said shaft. The shafts `34 and 79 are coupled by a coupling sleeve 92 secured to these shafts by setscrews 93. Thus the shaft 34 mayjbe4 driven at either high or low' speed in accordance with the position o f the sliding clutch member, high speed affording a rapid approximate setting of the tuning elements and low speed giving the final accurate set- -ting of the tuners.

In order to control the positioning of the member 91 for high or low speed there is provided a horizontal magnet 94 carried by brackets 95 supported from the base 10. This magnet has pole pieces 96 to one of which is pivoted one end of an armature 97, the armature extending over the magnet with its freeend over the remaining pole piece which is slotted at its` top to receive this free end. Depending from the free end of this armature is a stirrup 98 and through the bottom-of this stirrup extends the shank of a screw eye 99 which is held in adjusted position by means of the nuts 100 located above and below the stirrup bottom. Pivoted to the eye 99 is the lower end of a link 101 which has its upper end pivoted to the extremity of the short arm 102 of a bell crank lever. The angle of this lever is pivoted to an upward extension of one of the pole pieces 96 and the long arm 103 of the lever extends upwardly and is provided with a forked end 104 carrying pins 1,05 which engage in a circumferential groove 106 formed in the sliding clutch member. Fixed to the other pole piece 96 is a standard 108 through the upper end of which passes the shank of a screw eye 109 which is held in adjusted position by nuts 110. One end o-f a tension spring 111 is connected to this screw eye, the other end being connected to the long arm 103 of the bell crank. With lthis device the clutch member 91 is normally held by the spring 111 in engagement with the low speed clutch member 90 but energization of the magnet 94 shifts the member 91 into engagement with the high speed clutch member 89. Thus thev action of the motor, the brake and clutch are such that they can all be controlled from a distance 4by suitable wiring and switches.

ing brackets 112 which carry a small panel 113 whereon is mounted an arcuate resistance element 114 of the usual type -surronnding a shaft 115 having a contact arm 116 secured thereon by set screws 117 and arranged to traverse the resistance 114. This shaft has a spider 118 fixed-thereon and the spider is supported from the ring 27 of the particular worm .wheel by posts 119. Also on the front of the panel 113 are mounted brackets 120 two of which support fixed straight spring contacts 121 while the other two support movable spring contacts 122 having cam bends 123 confronting each other. The contacts 122 are disposed on opposite sides of the shaft 115 and on this shaft -is mounted a sleeve 124 which is held'on the shaft by a set screw 125. This sleeve carries a finger 126 which, in the extreme adjustments of the tuner engages with a respective bend 123 and forces the corresponding contact 122 out of engagement with its fixed contact 121 so that certain controlling circuits are broken at these points, as will be hereinafter explained, and the motor Sto ped so that no injury can be done the tun` from over-running.

On the base 10 are also mounted certain

double circuit closers

127, 128 and 129 each having a magnet arranged to attract a pair of armatures simultaneously and thereby close a` pair of breaks in certain of the cir-` tion, these rheostatsV being controlled by the usual knobs 132. This completes the apparatus at the receiving set so far as it particularly applies to the present invention.

l The remote control for the foregoing .in-I strumentalities ycomprises a casing 133having a cover 134. Within this casing is a voltrneter 135 having a hand 136 traversing` a scale 137 Which is divided in a manner like that of theaisual receiving set, the hand moves in accordance with the positions of .the tuning elements and the scale and point- `er end of the hand are visible through a Window 138 in the top 134. Fixed Within the easing is an insulating block 139 Whereon is secured one end of each of three spring contact fingers 140. .In the back of the casing isa conducting plate 141 and spaced from 4this plate toward the lfront of the casing is a second plate 142. In these plates are journalledl the ends of a contact roller or cylinder 143 having arcuate contact ribs 144 4running circumferentiall of the cylinder and having gappedy ends in which are normally received V-shaped bends 145 of the fingers 140. Moreover,"the gaps and lingers are so arranged that rotation in one direction closes Contact with one of the outside fingers While rotationin theaopposite direction closes contact with the other outside finger. To turn Vthis contact cylinder one reduced end is' extended through the casing front and on this end is fixed a knob 146 having a finger or 'pointer 147 which traverses Slow and Fast indicia 148. In order to prevent both contact fingers being brought into contact with ribs at thesame time stops 149`l are provided'which limit the movement of the finger 147 and consequently of the cylinder. It is to be noted that no matter in which direction the knob 146 is turned the lower rib will engage the lower finger.

The kswitch which controls the Abattcry and also controls the connection and disconnection of the entire apparatus is also included in this casing'. This switch includes a spring finger 150 and a contact cylinder 151 having a fiat portion so that when turned to one position this fiat portion isopposite and free from the finger 150 while when turned to its other position the cylindrical portion of the cylinder engages the finger 150. This cylinder 151 has a )stem which projects through the casing` front and has a knob 152 fixed thereon and carrying a finger 153 which moves betwee Off and On7 stops 154. From this casing runs a cable 155 carrying nine Wires which leads to the receiving se. and a second cable 156A carrying two wire;-J Which in reality are continuations of tWo oi the Wires in the cable 155 andare intended for connection to the listening device here shown (in Figure 20) as a loud speaker 157 of conventional construction, the usual jack being employed for this connection. An arm 158 and spring 159 serve to hold the cylinder 143 normally in open position regarding the fingers 140 and restores the cylinder to such open position as soon as the knob 146 is released. A friction spring 160 serves to hold the' contact ycylinder 151 in adjusted position.

The remaining Wires in the cable 155 are connected as follows Tvvo of these Wires lead to the voltmeter, one to each of the four spring contact fingers and the remaining wire has the contact cylinders connected in multiple thereto. For convenience in connecting and disconnecting the cable 155 from the receiving set this cable terminates in a multiple contact plug 161 having nine contactsratus 'as shown in Figure 20 it will be seen that the contacts of the plug' and socket are shown for convenience in tracing the circuits as connected by dotted lines. At 163 is an ordinary A battery and from the positive terminal of this battery leads a Wire 164 which is connected through the socket and plug with a Wire which is connected to the contact,

cylinders

151 and 143. From the finger 150 leads a wire 166 which is in turn connected through the plug and socket with a Wire 167 which leads to the circuit closer 127 and from this circuit closer a Wire 172 leads back to the negative pole of the A battery 163.

Tracing this circuit as has just been done i itf is plain that'closing contact between ythe cylinder 151 andnger 150 causes closing of the circuit closer 127. By this action a fila ment circuit is closed at 127a which may be traced as follows :-As before a Wire'164`is connected to the positive pole of battery 163 land from this Wire extends a Wire 173 which leads to 127". From 1278L a Wire 174 leads to filament F and from the filament leads a Wire which connects with Wire 172 and thus back to the negative pole of battery 163. Thereby the filament is energized. -Also the circuit lcloser 127 closes a circuit at 127'b which conthe Wire 168y and to this Wire 168 is connecteld a Wire which leads back to the batter on its positive side. It will be reinem ered lll) that the voltmeter 135 is also connected to the resistance 114 and thus a species of l/Vheat-l stone bridge is formed so that by properly adjusting the rlieostat 130 the reading of the voltmeter may be caused to balance with the position of the contact 116 on the resistance 114. Also, because of this balance `any shifting of the position of the finger 116 will be accompanied by a corresponding shift in the voltmeter hand so that the latter indicates at all times the correct position of the tuning elements. In order to conserve the battery 163 it is preferred that the motor be driven by the usual house current, generally 110 volts, and at 181 and 182 are indicated the leads for such current. The wire 181 is connected through the field winding 183 of the motor 38 with a wire .184 to which is connected in multiple the contacts 128b and 129a ofthe respective reversing

relays

128 and 129. These contacts are also connected inmultiple to a wire 185 which leads to one brush of the motor 38. Similarly, the wire 182 is connected in multiple to the contacts 128 and 129b of these relays, said contacts being connected in multiple by a wire 186 with the remaining brush of the motor 38. Obviously, if circuit closer 128 is energized current Will flow in one direction through the motor and if circuitcloser 129 is energized current will flow in the opposite direction. To control the energization of these circuit closers the following connections are made, it being remembered that wire 172 is connected to the negative side of the battery. From this Wire 172 leads a Wire 187 which connects to the magnet 56 of the brake mechanism. The magnet 56 is connected in series to the

circuit closers

128 and 129 by a wire 188 so that if either of these circuit closers are energized the brake magnet will be energized and the brake released. The circuit closer 128 is connected by a Wire 189 with one of the circuit breakers 122--121 which is connected in turn by a Wire 190 through the socket and plug to a wire 191 leading to the upper finger 140. Similarly, the circuit closer 129 is connected by a wire 192 to the other circuit breaker 121-122 and from there a wire 193 leads through the socket and plug to a wire 194 connected to the middle finger. Thus by turning the contact cylinder 143 in one direction 128 is connected to the Wire 165 leading to the positive side of the battery 163 While 'turning the contact cylinder in the opposite direction closes the circuit through 129 and the battery 163. This is true both for fast and slow action but a slight turn of the contact cylinder in either direction does not establish contact with the lower finger to energize magnet 94 while further movement in either direction does so establish contact and energizes thegear shift magnet thus The negative side of the battery is connected to magnet 94- bya Wire 195 and from this ma.,-

net a wire 196 connects through the socket and plug to a wire 197 connected to the lower finger 140 so that suilicient rotation of thc cylinder 143 establishes connection with the positive side of the battery through wire 165. Thus high speed is obtained. From the loud speaker posts of the receiving set lead Wires 198 which are connected through the socket and plug with wires 199 terminating in connections 260 for the loud speaker.

From the foregoing it will be seen that turning the button or knob 152 (Figure 11) to On positions arranges the apparatus for 'receiving and manipulation of the knob 146 enables -any desired setting to be obtained from wherever the control box 133 is located.

In Figure 21 a typical house arrangement is seen wherein the receiving set R is located in the cellar and sockets 162 are provided in the various rooms and connected in series by a cable C to the set R so that the cable 155 leading to the control box 133and loud speaker 157 may be plugged in at any place.

It is obvious that minor changes may be made in the form and construction of the invention Without departing from the material spirit thereof. It is not, therefore, desired to confine the invention to the exact form herein shown and described,`but it is desired to include all such as properly come within the scope claimed.

As an example of such changes the arrangement shown in Figure 22 inlay be used. In this figure it Will be seen that on the bracket 210 is mounted a brake drum 211 engageable by brake members 212 carried by brake levers 213 pivoted to a bar 214 fixed on the shaft 48. The levers 213 have weighted end's normally urged toward each other by the spring 215. i

Having thus described the invention. what is claimed as new, is:

1. In a distant control apparatus for a radio receiving set including a tuning element having a member movable to control the tuning of the set to desired Wave lengths, an electric motor, an operative connection between the movable tuning member and said motor including a change-speed gearing, a remote control device for said motor and said change-speed gearing, electrical means associated with the remote control device for indicating the position of said movable member, and other electrical means controlling the last mentioned means and operatively connected to said movable member.

2. In a distant control apparatus for a radio receiving set including a tuning element having a member movable to control the tuning of the set to desired Wave lengths, a reversing electric motor, can operative connection including a change-speed gearing between said motor and movable member to move the member at different speeds in directions correspondingto the revolution of theinotor, anda remote control device-for the motor andthe change-speed gearing includving a reversing switch electrically 'connected to said motor.

3. In a distant control apparatus for a radio receiving set including a tuning element, having a member movable to control the tuning of the setto desired `wave lengths, a reversing electric motor, an operative connection between said motor and movable lmember to move the member in directions correspond'- ing to the revolution of the motor, said opf erative connection including an lelectrically operated fast and slow motion device, and a remote control devicev for the motor andthe fast and slow motion device embodying a reversing switch electrically connected to said motor and a second switch electrically connected to the operating meansfor said fast and slow motion device.

1 4l'. Inj a distant control apparatus forfa radio receiving set including a tuning elem'enthaving a member movable to control the timing of the set to desired wave lengths, a reversing electric motor, an operative connection between said motor andmovable member to move the member in directions corresponding to the revolution of the motor, said operative connection includ-ing a high and low speed gear trains, a clutch member movable to connect a selected gear train to the movable member of the'tuning element, means including an electro-magnet for actuating thev tuningof the set to desired wavelengths, a

reversing electric motor, an operative connection between said motor and movablemlember to'move the member 1n directions corresponding to ,the revolution of the motor, said operative connection including a shaft, a gear driven by the motor and revolubly mounted on said shaft, a slow speed gear 4train driven- 'by said gear and .having a terminal gear also revolubly mounted on sai-d shaft, shiftable clutch means normally holding said terminal gear clutched to said shaft and adapt-led to move to unclutch the terminal gear and effeet clutching of the first mentioned gear to said-shaft, ,an electro-magnet forse moving saidv lclutch means, and a remote control device for the motor and the clutch means embodying a reversing switch electrically con-` nected to said motor and a second switch Jfor controlling the energization of said magnet.

6. In a distant control apparatus' for a radio receiving 'setn including a tuning elenent having a member movable to control he tuning of Ithe set to desired wave lengths,

a reversing electric motor, an operativeconnection between said motor and movable member to move the member in directions corresponding to the revolution of the motor, said operativeconnection including an electrically controlled fast and slow motiondevice, a remote control device embodying .a reversing switch electrically connected to said motor and a second switch electrically connected to the astand slow motion device, a brake for said motor restraining the "motorfrom moviement upon de-energization of the motor, and an electro-magnet for releasing said brake cnnected indirectly to the motor connections. Y

7. In a`distant control apparatus for a radio receiving-set including a tuning element having a member movable to control the tuning of the set to desired wave lengths, a reversing electric motor, an bperative connection `between said motor and movable member to move the member indirections corresponding to the revolution of the motor,

said operative. connection incliiding a high and low speed gear trains, a clutch member movable. to connect a` selected gear train to the movable member of thetiming element,

an electro-magnet'for actuating thetclutch member, a remote control device embodying a reversing switch-electrically connected'to said motor and a second switch 'for controlling the energization of' said magnet, a brake vfor said motor restraining'the motor from movement upon de-energization of the motor, and an electro-magnet for releasing' vsaid brake connected indirectlyl to the motor connections.' f l' 8. In a distant control apparatus for a radio receiving set including a tuning element having a member movable t\o control4 the tuning of the set to desired wave lengths,-

a reversing electric motor, an Aoperative connection between said motor and movable member-to move the member in directions corresponding to the revolution of they inotor, said operativeconnection including a shaft, a gear-driven by the motor and revolubly mounted on said shaft, a slow speed gear train driven-by said gear and having a terminal gear also revolubly mounted on `said shaft, shiftable clutch means normally holding said terminal gear clutched to said shaft and adaptedto move to unclutch the terminal gear and effect'clutching oftlie first men! tionedgear to vsaid shaft, an electro-magnet for so moving said clutch means, la remote control device embodying' a reversing switch electrically connected to-said motor and a second switch for controlling the energi'zation of said magnet, a brake for said motor restraining the motor "einem movement upon de-energization of theniotor, and an electromagnety for releasing said brake connected .indirectly to the motor connections. l 9. In a dist-ant control apparatus for a radio receiving set including a tuning element having a member movable to control the tuning of the set to desired wav'e lengths, a reversing electric motor, an operative connection. between said motor and movable gization to close the circuit through the mo-4 tor in opposite directions,- ancl a remote control device embodying a switch electrically connected to said relays and arranged for selectively closing energizingT circuits therethrough and a second switch for controlling the energzation of said magnet.

10. In a distant-.control apparatus for a radio creceiving set including a tuning element having a member movable to control the tuning of the set to desired wave lengths,

a reversing electric motor, an operative connection between said motor and movable member to move the member in direc-tions corresponding to the revolution of the motor, said operative connection including a shaft, a gear driven by the motor and revolubly mounted on said shaft, a slow speed gear train driven by said gear and having a terminal gear also revolubly mounted on said shaft, shiftable clutch means normally holding said terminal gear clutched to said shaft and adapted to move to unclutch the terminal gear and effect clutching of the first mcntioned gear to said shaft, an electro-magnet for so moving said .clutch means, electric mains connected to the motor in normally open circuit, the connections of the mains and motor including a pair of electro-magnetic relays arranged upon cnergization to close the circuit through the motor in opposite directions, and a remote control device for -embodying a switch electrically connected to said relays and arranged for selectively closing energizing circuits therethrough and a second switch for controlling the energization of said magnet.

1l. In a distant control apparatus for a radio receiving set including a tuning element having a member movable to control the tuning of the set to desired wave lengths, a reversing electric motor, an operative connection between said motor and movable member to move the member in directions corresponding to the revolution of the motor, said operativc connection including a high and low 'speed gear trains, a clutch member movable to connect a selected gear train to the. movable member of the tuning element, an eleotro-magnet for actuating the clutch member, electric mains connected to the motor in normally open circuit, the connections of the mains and motor including a pair of electromagneticJ relays arranged upon energization to close the circuit through the motor in opposite directions, a remote control device embodying a switch electrically connected to said relays and arranged for selectively closing energizing circuits vtherethrough and a second switch for controlling the energization of said magnet, a brake for said motor restraining the motor from movement upon de-energization of the motor, and an electro-magnet for releasing said brake connected indirectly to the motor connections. l

12. In a distant control apparatus for a radio receiving set including a tuning element having a member movable to control the Atuning of the set to desired wave lengths, a

reversing electric motor, an operative connection between said motor and movable member to move the member in directions corresponding to the revolution of the motor, said operative connection including a shaft, a gear driven b the motor and revolubly mounted on sai shaft, a slow speed gear train driven by said gear and having a terminal gear also revolubly mounted on said shaft, shiftable clutchmeans normally holding said terminal gear clutched to' said shaft and adapted to move to unclutch the terminal gear and effect clutching of the first mentioned gear to said shaft, an electro-magnet for so moving said clutch means, electric mains connected to the motor in normally open circuit, the connections of the mains and motor including a pair of electro-magnetic relays arranged upon energization to close the circuit through the motor in opposite directions, a remote control device embodying a switch electrically connected to said relays and arranged for selectively closing energizing circuits therethrough and a second switch for controlling the energization of said magnet, a brake for said motor restraining the motor from movement upon de-energization of the motor, and an electro-magnet for releasing said brake connected indirectly to the motor connections.

18. In a distant control apparatus for a radio receiving set including a tuning element having a member movableto control the tuning of the set to desired wave lengths, a reversing electric motor, an operative connection between said motor and movable member to move the member in directions corresponding to the revolution of the motor, said operative connection including an electrically controlled fast and slow motion device, electric mains connected to the motor in no1-mally open circuit, the connections of the mains and motor including a pair of electric- `magnetic relays arranged upon energization to close thecircuit through the motor in opposite directions, a remote control device em-v bodying a Aswitch electrically connected to said relays and arranged for selectively closing energizing circuits therethrough and a second switch electrically connected to the fast and slow motion device, said relay energizing circuits including normally closed circuit breakers, and means controlled by the yaction of the movable tuning member for opening a res ective circuit breaker upon said movable mem er reaching a limit of its movement. l

14. In a distant control ap aratus for radio receiving apparatus embo ying a tuning device, a.motor adjacent the receiving apparatus operatively connected to said tunm device to effect adjustment of the'latter, a

control element adjacent the receivin apparatus for throwing the motor into an out of operation, motive means adjacent the receiving apparatus for actuating said control element, means located at a point distant to said receiving .apparatus for controlling the operation of said motive means, the operative connection between the motor and the tuning device embodying a variable speed gearin for selectively effecting nick or Vernier a j ment of said tuning evice when the motor is operated, and means including a control device located atsaid distant point for eecting the speed changes of said gearing, at will.

15. In a distant control apparatus for radio receiving apparatus embodying a tuning device, a motor operatively connected to said tuning device, a remote control element for the motor, the o erative connection between the motor and t e tuning device embodyin a `variable speed, gearing for selectively e fectingv quick or vernier adjustment of said tuning device when the motor is operated, and means embodying a second remote control element for electing the speed changes of said gearing, at will.

' 16. A -structure a-s specified in claim 14, wherein means is provided including an indicator located at said distant point for indicating the adjustments made to said tuning Y device.

In testimon whereof I aliix my si ature. i FR DERICK W. :RE CK.