US1743706A - Radiotelephonograph - Google Patents

Description

Jam I4, 1930.

J. B. BROWNING RADIO TELEPHONOGRAPH Filed June 26. 1922 5 Sheets-Sheet l hum/Zr Jan. 14, 1930. BR WMNG 1,743,706

RADI O TELEPHONOGRAPH Filed June 26, 1922 5 Sheets-Sheet 2 Jan. 14, 1930. J. B. BROWNING ,7

RADIO TELEPHONOGRAPH Filed June 26. 1922 s Sheets-Sheet 3 Jan. 14, 1930. J. B. BQROWNING 1,743,705

RADIO TELEPHONOGRKPH Filed June 26. 1922 5 Sheets-Sheet 4 1930. J. B. BROWNING 1,743,706

I RADIO TE LEPHONOGRAPH Filed June 26. 1922 5 sham-sheet -5 Patented Jan. 14, 1930 JOHN BAILEY BROWNING, E CAMDEN, NEW JERSEY RADIOTELEPHONOGRAPH Application filed June 26,

Some of the objects of this invention are to provide an improved radio-telephonograph having a cabinet with radio telephone receiving and transmitting circuits, sound recording and sound reproducing means enclosed therein and a comparatively large sound amplifier having its major portion extending in the cabinet and having a portion extending outside of the cabinet; to

provide a radio-telephonograph including-a cabinet, sound amplifying means including a radio telephone circuit and a plurality of sounding boards arranged within the cabinet, and sound amplifying means carried by the cabinet and communicating with the sound reproducing means and sound recording means and sound transmitting means within and without the cabinet; to provide in a radio-telephonograph' an improved 2o mounting for a sound box armor sound conveyer; to provide improved sound amplifying means; to provide a portable radio tele phone receiving and transmitting station; to provide a'cabinet, cover or superstructure adapted to be used or substituted for the ungainly projecting horn now used in radio transmitting and receiving and generally used in talking machines and phonographs at the time of the filing of my application --ll1,454, Jan. 18, 1908; to provide in a radiotelephonograph a plurality of resonance chambers between the Walls of the cabinet and the walls of the amplifier and to arrange withinthese chambers a radio-telephone and telegraph and transmitting station in such a manner as to be convenient and accessible for operation; to provide improved means to operate a radiotelephone, line telephone or "line radio telephone to record or transmit a phonographic record; to provide improved means to operate the telephone circuits separately or together; to provide improved means'tomodify the quality of the reproduced sound; to provide an -improved radio antenna and its arrangement and method of mounting for movement within a cabinet or which may be pivotally mounted on either door as a removable unit or positioned within the cabinet around the amplifier, radio and radio set; to provide improved 1922. Serial No. 570,906.

means by which one group of'persons in a room may listen to radio by connecting receivers into the electric amplifier and another the phonogaph by operating the mechanical reproducer with a record, one without disturbing the other.

By sound reproducing means, there is meant any electrical or mechanical means capable of re-producing sound which may have previously originated and been recorded at the same or distant point, which may be originating in another locality simultaneously with the operation of the reproducing means, and which may comprise a simultaneous re-production of previously recorded sound with sound as it is being produced at a distant locality or by physically discon nected means wherefore the term secondary sound producing means! is herein applied to the similar functions performed by the electro-magnetic reproduce'r hereinafter described and the mechanical reproducer of an ordinary phonograph.

In the accompanying drawings Figure 1 is a side elevation partly in vertical section and partly broken away of one embodiment of my invention.

Figure 2 is a plan view partly in horizontal section and partly broken away.

Figure 3 is a side sectional view of a modified form of construction.

Figure 4 is a side elevation of a radio antenna.

Figure 5 is a vertical section of the embodimcnt shown in Figure 3 on line 5-5 of Figure 3.

Figure 6 is a horizontal section of the same modified embodiment on line 66 of Figure 3. v

Referring to the drawings, in one embodiment of this invention is shown a table or cabinet 1-, on which a base 2 of the usual talking machine rests. The tone arm 4 is pivotally supported on the pivot 3 Pivoted to the tone arm 4 is a curved .tube 164 which in turn carries the sound box 5 which operates on the .disc 15 supported on the turntable 7 and centered by means of the spindle 6. i

Also pivoted to the arm 4 is an additional curved tube 164 which in turn carries the electric transmitter and reproducer 162, the arrangement of mounting and operating may be the same as shown in the Browning Patent No. 1,022,180, issued April 2, 1912, on application filed December 22, 1903, Serial No. 186,197, of which this feature with respect to the electrical apparatus is referred to as a continuation in part through the thencopending application 411,454, filed January 18, 1908. 6" is the handle for operating the motor of the machine.

The pivot 3 extends through the smaller end of a hollow tapering elbow or bracket 8, the smaller end of which is in vertical alignment with the larger end of the tone arm 4. This hollow elbow 8 in connection with the hollow rigid non-vibratory coupling 18 and 19 forms the sole support of the tone arm-4 and the sound box 5, electrical transmitter and reproducer 162, when either are in an inverted or inoperative position resting upon the smaller end of the tone arm and the hollow bracket 8, 18, 19 also forms the sole support of the tone arm 4, electrical apparatus 162 and the sound rcproducer 5 when the reproducer or electrical apparatus is in operative position upon the record excepting for such partial support as is given to the reproduccr 5 or electrical apparatus 162 by the record 15. The larger end of the elbow 8 in connection with the clamp 1819 opens inwardly toward and substantially in alignment with a substantially circular opening provided therefor in the back wall of a rectangular hollow cover or upper portion 9 of the cabinet. This upper portion or cover 9 of the cabinet may be constructed from any suitable material and is provided with an inclined vibratory partition or sounding board 10 which is arranged in the upper portion 9 of the cabinet above a pair of vertical, forwardly diverging vibratory partitions or sounding boards 11 and 11 which rests upon a substantially horizontal vibratory partition or sounding board 12, which divides the interior of the cabinet into a tapering sound amplifying chamber 14 and a substantially rectangular sound amplifying chamber 13 in which is contained the turntable 7 sound reproducer or recorder 5 and a telephone receiver or transmitter 162 either line, line radio or pure radio. The inclined shelf or partition 10 forms the lower wall of a resonance chamber 14 which may be utilized to contain records 15 or elements of a radio circuit, and separates this chamber. 14 from the tapering sound amplifying chamber 14.

Between the vertical partitions 11 and 11 and the adjacent side doors 36 and 37 of the cabinet are air spaces or resonant chambers 16 and 17 which may be utilized to arrange or mount the various elements of a radio receiving or sending circuit. On the back of the upper portion 9 of the cabinet and fitting snugly over and projecting froin the hollow elbow or bracket 8 is the upper and lower half 18 and 19 of a longitudinally split coupling which is attached to theback wall of the cabinet by screws 2101' in any well known manner. The couplinglS, 19 fits snugly around the larger end of the hollow elbow 8 and arranged to damp out any tendency of the elbow to vibrate if made of hard or light brass, and holds the hollow elbow in operative position, together with the tone arm 4, )ivoted tube extensions 164, 164, telephone transmitter and receiver 162 and reproducer 5 carried thereby. The coupling or clamp 18, 19 is arranged to form a continuous tapered sound passage of gradually increasing cross section and is made substantially heavy in cross section and nonvibratory. The coupling may be in one piece either larger or smaller than shown and slipped over the small end of the bracket or elbow 8 and attached to the cabinet in any well known manner, or the elbow 8 together with the coupling 18, 19 may be made in a one piece casting heavy 'in cross section and comprise a hollow tapering rigid bracket gradually increasing in cross section, and further provided with sound conduits which will be more fully described in connection with the radio circuits.

The back wall of the cabinet 9 is provided with anaperture 22 through which passes the tone arm 4, and in the cabinet and surrounding the tone arm 4 is a collar or sliding door 23 which has a spring 24, one end of which is connected by a screw 25 to the back wall of the cabinet. The tone arm passes through an opening 27 provided therefor in the sliding door 23, which permits the tone arm, to move freely while in operation, and at the same time the sliding door 23 keeps the opening 22, through the back wall of the cabinet, closed.

The upper portion'9 of the cabinet is clamped to the lower portion or base 2 by a clamp 28 which is retained in place by a set screw 29. The base portion 2 is provided with an overhanging top portion over which fits the concave curved portion 9 of 9 permitting the cover 9 to be raised and lowered by loosening the screw 29 in a manner forming av hinge. I

The cabinet is also provided with a plurality of lower front doors 30 which swing on hinges provided, whereby the rectangular sound amplifying chamber 13 may be opened and closed, and the cabinet is also provided with two hinged upper front doors 32 so that the sound issuing from the sound amplifying chamber 14 may be modified and controlled in direction at the will of the These doors permit of convenient access.

from either side of the machine to the reso- When'it is desired to establish communications between two installations, the loops 112 by virtue of their directional transmissions and reception must be in the same plane that is pointing at each other, one station should be tuned in receiving to a wave to which there is-no interference and nance chambers 13, 14 and 16 and 17, amhe other station tuned to radio resonance,

also control the effective areas of these chambers as sound amplifying spaces and act to modify the action of the tapering sound amplifying chamber 14*.

There is also provided a brake comprising a plunger 38 having a head at one end and a pin 39 through its other end, which re: tains a spiral spring 40 which surrounds the plunger-38. A brake shoe 41 is carried by the inner end of the plunger 38, and an escutcheon 42 surrounds the plunger 38 between the spring 40 and the head of the plunger and is secured to the outer surface of the back wall of the cabinet. The escutcheon 42 has an elongated central opening, and the plunger 38 is so arranged that by rotating the plunger into a suitable position the plunger. is allowed to be drawn inwardly by the spring 40 to press the brake shoe 41 against the margin of the turntable 7 to stop the rotation of the turntable.

This improved radio telephonograph also provides a radio telephone receiving and transmitting circuit including the antenna, all of which may be conveniently arranged in the resonant chambers around the sound amplifier 14 -without materially affecting their resonance. A portion of the sounding board 11 in Fig. 1 is broken away illustrating a diagram of a radio telephone receiving and transmitting circuit, the hook ups of which may be varied according to desire.

The illustrated diagram is for intercommunicative radio work covering a distance which will vary greatly with the applied plate potentional 100 from one to several blocks. It will be observed that a support 99 is arranged in the chamber 16 spaced away from the sounding boards on which may be mounted a panel for the various units of the radio circuit illustrated which includes a telephone head set 102 and a high resistance potentiometer 104 with ashunt switch or push button 106 are placed in series with the high voltage, with the push button released the combined reaction and resistance of the potentiometer should be of that critical value to just stop the oscillations at any capacity of the tuning condenser 108, a condition that is achieved by adjusting resistance 104 at this point the loop will act as areceiver for radlophone speech or spark signals, however, when the push button is depressed the full battery potential is applied to the vacuum tube 110, which will cause the tube to oscillate and the set to transmit.

the tube 110 being causedto oscillate by the operation of 106 in the station desiring to transmit. The vibrations impressed on the transmitter 114 in the transmitting station will be transferred as ultra-audio signals to the receiving station where they are transformed into audible vibrations through the circuit of the receiving station, and when the receiving station desires to transmit, the operation as above described is reversed. Each station will now transmit and receive on the same wave. Obviously the sound vibrations whether produced by the diaphragms included in the radio circuit or by those included in the sound producing means of the phonograph are conveyed, amplified and their quality varied in the same manner. Therefore the sound vibrations however produced are of the same secondary character.

This improved radio-telephonograph also provides an improved antenna which is arranged within the cabinet and comprises a tensioned roller or spool 120 removably bracketed in frame 146 on a removable support 123 which is removably attached to the side door 36 or 37 in any well known manner or as the pivoted antenna uhit illustrated in Fig. 4. The ends of a plurality of separate antenna wires 125 and 126 are attached to the spool and wound thereon, each wire is looped through the insulators 128 and 129 which are carried by the spreader 131. The spreader 131 is carried by an extendible arm 133 and 134 and removably connected thereto by wingnut 135. The two arms 133 and 134 are extendible and clamped together 'by the clamps 138 and 139 and are tightened by the clamp screws 140. The arm 134 ishinged at or by hinge 145 to the frame 146. Pivotally mounted in the frame 146 between the spool and the spreader are two rollers 142 and 143. one on each side of the antenna wires connecting them in loops.

The spreader, arms and rollers are mova stand 123 outside of the cabinet.

through the insulation tube 128 and through as many loops as are provided, the length of the antenna being the total length of all the loops between the spreader and the rollers, the portion of the wire remaining on the spool being out of the circuit. The number of the loops may be varied or the total length of the antenna may be varied by adjusting the spreader toward and away from the spool and in this way the natural wave length of the antenna may be varied to work in harness with a particular hook up or set, or the antenna may be adjusted or tuned to pick up without any or little tuning. The antenna may be pivotally mounted on the door 36 and movable with respect thereto as an antenna unit illustrated in Fig. 4, or itmay be adjusted across the inside of the cabinet on either or both doors to point in any desired directions, and when not in use adjusted to close within the cabinet.

A line 155 is provided attached to the spreader to increase the antenna any desired length and the antenna may be pivotIe-d on f desired the loop antenna 85 Fig. 6 may be substitute'd and positioned aroundthe horn in Fig. 1.

The nonvibratory bracket 18, 19 is provided with a plurality of tapered sound passages 160, 161 and 162 which lead into the sound amplifier 14. Radio or line phones 165 and 166 may be connected to the inlet end of these sound conduits and the sound directed from the phones into the amplifier 14 and a loud speaking telephone receiver 168 may be connected to the upper passage 160 and the sound directed into the amplin'er and reamplified in the same manner as the sound reproduced by the means 5 and the quality of the amplified sound modified at will on either side by the doors. When it is desired to make a phonographic record from a radio receiving circuit, the doors 32 are closed and the sound discharged from the hones 165, 166 or 168 into the sound ampliher 14 towards the closed doors 32 which act as a reflector to reflect the sound back through the amplifier 14 and through the sound passages of the rigid bracket 18, 19, 8 and 4 where it is concentrated to vibrate a diaphragm at 5 and record the sound vibrations on a record tablet in a well known manner, which may be reproduced at any time or if desired in co-operation with a radio circuit. An additional curved tube 164 is attached to the T coupling arranged at the small end of the tube 4 which carries a telephone transmitter 162. When it is desired to transmit by radio the push button 106 is depressed and the doors 32 are opened and the sound or speech is projected into the chamber 14 where it is concentrated and conveyed back to the transmitter 162. lVhen it is desired to transmit a phonographic record over the radio circuit, the phonograph is operated in a well known manner,

ter and through the radio circuit out. over the antenna.

It is obvious that the doors in this improved radio-telephonograph perform a most important function in operating the radio and the phonograph either separately or together.

The diagram of the hook up shown in the compartment 17 of Fig. 2 is the same as shown in Fig. 1, but the hook up shown in the compartment 16 of Fig. 2 is one of the simplest. radio receiving circuits using phones 102, crystal detector 176, fixed condenser 178 and a variometer 170 which may be used in any vacuum tube circuit. Either of these circuits illustrated in either series or parallel may be varied for any other well known circuits either of which may be connected to an outside antenna with or without a ground or any loop antenna of well known form may be used, either of said circuits may be connected to all or any one of the radio reproducers 162 when used as a reproducer. 165, 166 or 168 in any well known manner the lead wires not being shown the arrangement of which may be varied to suit the convenience of the operator. Referring to Figs. 3, 5 and 6 of the drawings another modification or embodiment of this invention is shown in the form of a console or table cabinet 50, which is also provided with a plurality of resonance chambers between the walls of the cabinet and-the walls of the amplifier 52 and- 56, each of which may be subdivided with smaller chambers 53, '54, 57 and 58 without atfecting the resonance of the cabinet, and between these two and beneath the cover 60 is provided a central amplifying chamber 55 which comprises the outer portion of the sound amplifying means not including elements of the radio circuit.

The inner amplifier includes a hollow vibratory tapered portion 65 which is carried by a hollow nonvibratory section 66 which communicates with a minor hollow tapered portion 4, and a plurality of small tapered transversely extending tubes as illustrated in Fig. 2. These portions are arranged to swing in a vertical and lateral plane above and below theturntable. 'A substantially heavy portion 66 is carried at the rear of 66 to counterbalance the weight of the arm 4 and connections carried thereby. The nonvibratory portion 66 is pivotally balanced in a yoke. 68 to swing in a vertical and lateral plane substantially heavy enough to give the proper pressure of the stylus against the record tablet. This section 66 is also provided with a plurality of sound condults 71, 72 and 7 3 arranged on opposite sides to communicate with the phones 165, 166 or a loud speaker 168. 4, 66 and 65 form a continuously curving, tapering sound amplifier avoiding all sharp turns and thus giving all the eificiency of a large straight horn without its cumbersome length.

Arranged across one end of the chamber 55 are a plurality of pivoted defiectors 75 which may be adjusted to deflect the sound upward or downward and arranged at eachend of the chamber 55 at the delivery openings are two doors 77, 78 and 79, 80 which may be arranged to modify the. quality of the reproduction at will on either side of the cabinet and also tov permit access to the chamber for adjustment or removal of the various parts including the antenna.

Doors 82 and 83 are also provided for the resonance chambers 52, 53, 54, 56, 57

and 58 for the purpose of regulating their resonance and for convenience of access on either side of the cabinet.

The dividing walls or sounding boards 90 and 91 arranged between the chambers are semitransparent or conductive to sound vi brations in the same manner as the sounding boards 11, 11 and 12 and 10, Figs. 1 and 2, and may be imperforated if desired by openings 96. The motor board 92 isprovided with two semicircular openings 93 and 94 through which swings to point in any direction the radio antenna 85. The radio antenna shown in this modification includes a square frame 85 with four cross pieces 86 one at each corner, around which is wound the antenna wire, 87 of the desired number of loops. The frame is also provided with a pivot 88 which fits into a socket bearing on the motor board 92 permitting the antenna to swing freely through the openings 93 and 94 around the motor compartment 95 and the sound amplifier 65 and 66.

The phonograph motor compartment 95 may be arranged in any convenient position v beneath the motor board 92 within the chamher 55. The yoke 68 on which is mounted the non-vibratory portion 66 is provided with two pivots at the end of each arm, which fits into pivot bearings arranged in the ball portion 63 of 66 and permits vertical movement of 4, 66 and 65, lateral movement being provided for by the pivot 69 of 68 which is mounted in any well known manner in the chamber 55.

The ball portion 63 of 66 is arranged to work in a socket bearing 64 arranged on the motor board 92.

The cover 60 is provided with a resonant chamber 61 within which may be arranged a radio telephone circuit including an antenna, which can be conveniently operated when the cover is raised.

Sound waves that are projected from the open side of the reproducer 5 into the resonance chamber 62 formed by a portion of the cover when closed, will pass through the openings 93 and 94 into the chamber 55, mingling with the sound delivered from 65, where it will be modified by the deflectors and tone doors 77, 7 8, 79 and 80.

Arranged within the resonance chambers 52 and 56, in a manner not to interfere with their resonance, is a radio telephone receiving circuit, the diagram of which is shown in Fig. 6. This hook up may be modified according to desire, it may be built up of a number of separate units each including different stages of audio or radio amplification and arranged within the cabinet to meet different requirements or may be substituted for any other well known form of hookup or circuit which may be interchangeable in either of the cabinets illustrated in Figs. 1 and 6.

The hook up may include a battery as a source of energy or may be directly connected with the electric light circuit including line and line radio with. proper means to make the latter suitable for the purpose. In this diagram there is only one adjustment required to tune the set to the proper wave length. This adjustment is accomplished by means of a variable condenser across the loop antenna, and giving a variation sufficient to tune in man of the radiophone broadcasting stations that may be heard.

An ordinary switch W controls the current of all the filaments of the vacuum tubes used in the radio amplifier, as well as in the field of the loud talker, which may be of the magnavox type. Consequently, once the condenser has been adjusted so as to receive the transmissions from a radio broadcasting station with maximum intensity, it is merely necessary to turn on the switch when the station is transmitting, to bring in the music and speech that are being transmitted. This feature makes it a very easily operated radio circuit.

In the radio amplifier are incorporated two stages of radio frequency amplification, a detector, and three stages of audio frequency amplification, the last stage of which may be used as a power amplifier so as to operate the loud talker with a maximum eiticiency. In this diagram, A indicates a single circuit jack for the connection of the loop antenna to the set, which is made by means of aplug. Bis a double circuit jack to cut in the second step of audio frequency amplification if it is desired to use telephone receivers for long distance reception or if one or more persons desire to listen to radio signals without disturbing one or more persons from listening to the phonograph. G is a variable condenser shunting the loop antenna for the purpose of tuning the circuit to the proper wave length while 'D is the grid leak and E the grid condenser, the capacity of which depends upon the type of the vacuum tube detector used; it is generally between .00025 and .0005 microfarad. F

, and F represent the radio frequency transformers and G and G the audio frequency transformers, a ratio ,of turns of about 8 9 to one, so as to obtain maximum amplifi tion. The letters H and I indicate the p imary and secondary windings of each transformer. J and J represent the vacuum tubes of the radio frequency amplifier, which may be amplifying tubes of any make, and M the 5 watt power tube upon the plate of which a very high voltage may be applied. K is the detector tube, L and L, the audio amplifying tubes. N, O, O and O" are the rheostats of the detector radio and audio amplifying tubes. P is an ordinary 6-ohm rheostat. R indicates the 6 volt battery which should be of suflicient size to supply all of the tubes and the field of the loud talker for a sufficient length of time Without recharging. S and T are the grid batteries which are used only if a rather high voltage is used on the plates of the last three tubes. U is the B battery which for a maximum efliciency should have a voltage of 200 to 300 volts with taps for the detector, the

radio amplifier and the two. first audioamplifier tubes. The grid leaks shown across the secondary windings of the audio frequency transformers are necessary only if a high voltage is used, so that the audio frequency amplifier acts as a power amplifier, their value'varying with the transformer in use.

The radio frequency transformers should preferably be of the iron core type and be so designed as to cover the band of wave lengths which it isdesired to receive, and a potentiometer V should be used so as to control the oscillations of the first two tubes. The loud talker not shown in the diagram,

should be connected between the plate of the last tube, and the positive of the B battery U; the field coil being in parallel w1th the filaments of the tubes. The loud talker 168 is shown mounted on the heavy nonvibratory portion 18 (Fig. l) communicating with the passage 160 which leads into the sound amplifier 14:. shown connected to the rear portion of the amplifier 66, if it is desired it may be placed on the small end of one of the tubes, which are arranged as illustrated in Fig. 2, or one of the phones 165, 166 may be connected on the small end of one of these tubes and wired as desired, and a radio selection tuned in and the reproducer 5 arranged to function with a tablet 15 of the same selection as the radio selection, and the radio and phonograph synchronized to function simultane- In Fig. 3, 168 is ously harmoniously together, by speed adjustment of 7 and 15.

From the foregoing it is evident that this invention provides a radio-telephonograph havingimproved sound amplifying means including an outer casing and inner diverging walls or sounding boards forming a or tapering sound amplifying chamber or pasasage surrounded by a plurality of normally closed air spaces surrounding the tapering amplifying chamber, as shown in Fig. 1 or a rectangular chamber as shown in Figs. 3,5 and 6, and which act as resonators in which the confined air will beset in vibration by the action of the vibratory walls,

thus cooperating with the sound conveying passages 14; (Fig. l) and 55 (Figs. 3, 5 and 6) in amplifying the sounds delivered from the secondary or second secondary sound amplifier is enclosed.

It is also evident that this invention provides a radio-telephonograph having a compact portable cabinet which encloses the sound re-producing means and the major portion of the sound amplifying means and a radio telephone receiving and transmitting station including the antenna.

It is also evident that by having a portion of the arm 4 with a small portion of the sound amplifying means project laterally,

from the cabinet, a comparatively large sound amplifier may be used with any given cabinet in which the major portion of the sound amplifier-is inclosed.

"It is also evident that the invention provides in a radio-telephonograph a compact portable loud speaking set which may be adjusted to various phonographs now in use, and that the radio earphones may be connected into the radio circuit permitting one portion of a group to listen in on the radio while another portion of the group in the same room may listen to the phonograph, each portion separately without disturbing the other.

It is also evident that the invention provides an improved antenna adjustable to.

change its natural wave length and to point in any desired direction, also to be conveniently arranged in a portable cabinet without interfering with any of the other sound reproducing or amplifying elements, and that its direction may be changed without changing the position of the cabinet.

It is also evident that this improved megaphone or sound am lifying cabinet is an im-v provement in the p) onic art and not limited to any particular ranch..

It is also evident that sound roduced from a radio circuit or other telep one circuits is secondary in substantially the same manner as the phonograph ,r'eproduction where they depend upon the vibrations of a diaphragm which are secondary, that is and the radio antenna adjustable to project,

which are not primary as at the source or origin of the sound.

Although only the two forms are shown herein in which this invention may be embodied, the invention is not limited to any particular construction but might be embodied in various forms without departing from the spirit of the invention or the scope of the appended claims.

What I claim is as follows 1. In a radio-telephonograph, the combination with a cabinet provided with a sound chamber, a radio circuit carried by said cabinet, a sound reproducer connected with said circuit and communicating with said chamber and arranged to deliver sound thereintd, said chamber having an exit opening and an antenna carried by said cabinet and movable with respect to said opening.

2. In a radio-telephonograph, a receiving apparatus for radio signals comprising a cabinet including a sound amplifier, a receiving antenna carried by the cabinet and movable with respect to the amplifier, a receiving system comprising an amplifier and a detector operatively positioned within the cabinet and electrical sound reproducing means associated with said system to deliver sound-into the sound amplifier.

3. In a radio-telephonograph, a receiving apparatus for radio signals comprising a cabinet including a plurality of resonance chambers one of which is a sound amplifier, separate closure means for said sound amplifier and said chambers, a receiving antenna wound within said cabinet and upon said closure means, and a radio receivin circuit associated with said antenna, sai circuit being arranged in said cabinet adjacent said sound amplifier and said closure means.

4. In a radio-telephonograph, a radio receiving apparatus comprising a cabinet in-.

closing a plurality of chambers, one of which is a sound amplifier,-separate closure means for said chambers, a receiving antenna wound within the cabinet and upon said closure means, said closuremeans serving to direct said antenna, and a radio receiving circuit associated with said antenna and be- JOHN BAILEY BROWNING.

ing arranged in said cabinet in communication with and adjacent to said sound amplifier and said closure means.

5. In a receiving apparatus for radio signals comprising a cabinet enclosing a sound amplifier and having a movable side Wall, an antenna carried by said wall and movable therewith into and out of operative position, and a radio circuit cooperating with said antenna and including electrical sound reproducing means to deliver sound into said sound amplifier.

6. The combination with a cabinet of a radio receiving set and an antenna, said antenna being mounted on one wall of said

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