US1720949A - Combined phonograph and radio receiving set - Google Patents

Description

July 16, 1929. z ECKELBARGER 1,720,949

COMBINEDPHONOGRAPH AND RADIO RECEIVING SET Filed Oct. 31, 1925 3 Sheets-Sheet 1 July 16, 1929. 2. ECKELBARGER COMBINED PHONOGRAPH AND RADIO RECEIVING SET Filed 001;. 31, 1925 3 Sheets-Sheet 2 hum In Maia for.

Jul 16, 1929.

2. ECKELBARGER COMBINED PHONOGRAPH AIID RADIO RECEIVING SET 1925 5 Shgets-Sheet 3 Filed Oct. 31

Patented July 16, 1929..

UNIGTEDYFSTATES ZENA IEG'KELBARGER, 0F GOSHEN, INDIANA.

GOMBINED PHONOGRAPH AND RADIO RECEIVING SET.

Application filed October 31, 1.925. Serial No. 66,072.

This invention has for its object to provide a combined phonograph and radio receiving set including the usual loud speaker unit which'is characterized by the promsion of a novel type of horn having several inlet branches connected, respectively, with the phonograph sound box and the loud speaker unit of the radio receiving set, whereby the operator may, as occasion or preference may dictat operate either the speaker unit of the r60 set or the phono graph.

-A further object is to provide means for alternately opening and closing the passage through the branches of, the horn so as to confine the sound emanating from the loud speaker unit or the sound box, according to which is in use, and thereby insure its delivery to the outlet of the horn without sacrifice of volume or quality of tone.

A further object is the provision of a conveniently operable device for controlling the adjustment of the means for opening and closing the branches of the horn, said devicehaving associated therewith a circuit controller interposed in the circuit of the loud speaker unit so that upon opening of v the passage through the branch of the horn which communicates with the loud speaker nnit, the circuit controller is closed, whereas when the control device is adjusted to close the last mentioned branch the circuit controller is open so as to interrupt-the operation of the loud speaker unit.

' ment of the movable parts of the invention Still further objects of the invention are the provision of means for eflectively dampening or absorbing such vibratory moveas would have an undesirable effect on the reproduction of sound, and also the provision of numerous other novel features of zonstruction and arrangement tending to render the combined radio receiving set and phonograph more eflicient, compact and convenient to manipulate.

In the accompanying drawing, Figure 1 is a front elevation of the invention, the

- door of the radio compartment and the lid of the phonograph compartment being open;

Figure 2 is a top plan view of the cabinet partly broken away and partly in section showing the improved horn and the control device for the horn valves and the switch of the speaker unit;

Figure 3 is a section on the line 33 of Fig. 2; 0 Figure 4 is an enlarged fragmentary elevation of the horn showing the point of JHIIClDlIIG between the branches thereof;

Figure 5 is a sectional view on the line 5-5 of Fig. 2;

Figure 6 is a detail sectional view through one of the valves in a branch of the horn;

Figures 7 and 8 are enlarged details illustrating the connections between the control lever and the switch and the control lever and the valves.

Referring to the drawing in detail, the numeral 1 indicates a cabinet preferably constructed along artistic lines so as to enhance its appearance and in which are provided compartments 2 and 3, the compartment 2 having a door 1 therein and the compartment 3 having an open top adapted to be closed by a hinged lid 5.

Within the compartment 2 there is arranged a preferred type of radio receiving set 6 having jacks 7 adapted to receive the usual plug 8, whereby the various stages of the radio or audio frequency amplification may be plugged in as desired. The wires or conductors 9 and 10 connected with the plug 8 are extended into the compartment 3, the conductor 9 being directed as at 11 with one terminal of the loud speaker unit -12 and the other conductor 10 being connect-ed with one pole 13 of a'double pole switch designated generally at 14 which is suitably mounted on a wall of the compartment 3. A conductor 15- is connected with the other pole of the loud speaker unit 12. The movable blades 17 of the switch are pivotally mounted at 18 and are adapted to be actuated in a manner to be hereinafter described to bridge the conductors 10 and 15 and thus close the circuit from the plug 8 to the loud speaker unit 12 An approved type of phonograph designated generally at 19 and indicated in dotted lines in Fig. 3 is located in the upper portion of the compartment 3 and includes the usual revolving table 20 and sound box 21 connected with the hollow extension 22 through which sound emanating from the sound box 21 is conducted.

The relatively large open end of a born 23 is located behind an opening 24 provided in the front of the cabinet 1 so as to give direction and volume to the sound produced by the loud speaker unit 12 or the sound box 21 according to which is in use. The relatively small rear end of the horn is provided with a relatively wide vertical bend 24 which is divided at the point 25 into two branches 26 and 27, the branch 26 extending vertically and having the horizontally movable tone arm 28 swivelly mounted thereon, to which arm the extension 22 of the sound box 21 is suitably connected. The branch is connected with the branch 26 at such angle as to produce a stream-line effect so as to gradually change the direction of movement of the sound waves passing thuough the branch 27 and entering the bent rear portion 24 of the horn.

The branch 27 is gradually reduced in diameter from the point of juncture 25 to its opposite end which latter is connected with the loud speaker unit 12, the intermediate portion of the branch being provided with a bend 27 enclosing the lower leg thereof at an inclniatlon to the vertical and also disposing the loud speaker unit 12' m the lower portion of the compartment 3.

At points adjacent the juncture 25 the branches 26 and 27 rotatably receive diametrically disposed shafts 28 and 29, respectively, on which are mounted disk-like sound control valves and 31. In order to dampcn and absorb such sound as might be produced by vibration of the shafts 28 and 29 and the valves 30 and 31, said shafts are in bearings 32 formed of felt orjournaled similar material and the valves are faced with a similar material. on both sides as indicated at 33.

The shafts 28 and 29 are provided with arms 3-1 and 35 which are connected with a link 36, gaskets formed of felt or other soft material 37 being interposed between the link 36 and said arms, whereby'to prevent relative vibratory movement of these parts. The arm 35 is provided with an extension 38 which is connected with the adjacent end of a flexible actuating member 39. The opposite extremities of' the actuating member 39 is connected with an operating or control lever 40 pivotally mounted at 41 in the compartment 3 and provided at its opposite end with' a handle 42 conveniently located-for manual manipulation. The medial portion of the flexible member 39 passed through a guide 43 partially supported by an arm 44 mounted on the horn branch 27. The end of the flexiblemember 39 passes through an aperture provided in the head 45 of a connecting pin 46 which latter passes through the control lever 40 and is spring pressed to prevent objectionable vibratory movement thereof by an expansion spring 47 confined between the lever 40 and an abutment 48. The flexible member 39 is held in adjusted position in the head 45 by a set screw 49.

The blades 17 of the switch 14 are conthe compartment 3 until it'is in nected with and actuated by the lever 40 through a connecting rod 50 connected at 51 with the blades 17, and at its opposite end with a pin 52held against vibratory movement on the lever 40 by a spring 53 in substantially the same manner as the pin 46.

As will'be found by reference to Fig. 4 the valves 30 and 31 are so arranged on their shafts 28 and 29 that. when the valve 30 is closed, as shown in Fig. 4, the valve 31 is open, whereas, when the lever 40 1S moved forwardly to the position shown in Fig. 5,

the shafts 28 and 29 are actuated so as topulled out and the circuit of the loud speaker unit is thus interrupted. On the other hand, when the lever 40 is moved rearwardly the valves are moved to the position shown in F 4 and the switch blades 17 being, moved rearwardly by the rod 50 close the circuit of the loud speaker unit 12 and the latter is set in operation provided, of course, the plug 8 is inserted in a jack 7 and the radio set 6 is properly in tune with a broadcasting station. The provision and location of the valves 30 and 31 insures maximum quantity and quality of tone pro duced by either the phonograph or the radio set and the construction and arrangement of the'branches of the horn enhances these desirable results.

The horn structure including the horn body 23 and the branches 26 and 27 thereof are preferably constructed of metal and it is supported in its entirety in the compartment 3 on a post 55 by brackets 56 slidably mounted on post 55 and held in position thereon by set screws 57. The lower bracket 56 rests upon a sleeve 58 having its lower terminal threaded and receiving a tubular nut 59 secured upon the post 55, whereby upon rotation of the tubular member 58, after loosening set screws 57, the entire horn structure may be moved vertically within a desired position. Thereafter the horn is secured in place by tightening the set, screws 57 I claim:

1. In combination, a radio receiving set including a circuit and a loud-speaker unit interposed in said circuit, a switch also interposed in said circuit, a phonograph including a sound-box, a horn, a plurality of branches connected with said horn and connected with the loud-speaker unit and the sound-box, sound control valves located in said branches, a. control lever, adjustable means connecting the control lever wit-h the valves for simultaneously actuating the latter. and mechanical means for actuating said switch.

2. In combination, a radio receiving set including a circuit and a loud-speaker unit interposed in said circuit, a switch also interposed in said circuit, a phonograph including a sound box, a horn, a plurality of branches connected with said horn and connected with the loud-speaker unit and the sound-box, tiltable sound control valves located in said horn branches, a control levergn'icans ctmnecting the control lever with the valves for simultaneously actuating the latter, and mechanical switch actuating means connected with said lever.

3. In combination, a radio receiving set including a circuit and a loudspeaker unit interposed in said circuit, a switch also intel-posed in said eil'cu'it, a phonograph in cluding a sound-box, a horn, a pair of branches connected with said horn and connected with the loud speaker unit and the sound-box, a tiltalole sound control valve located in each of said horn branches, link age Connecting: said valves eXt-eriorly of the horn branches to synchronize the valve movement. a control lever, means connecting the control lever with said valve linkage for simultaneously actuating said valves, and linkage connecting said switch and control lever for actuating the former.

Iirwitness whereof I have hereunto affixed my signature this 29th day of October, 1925.

ZENA ECKELBARGER.

Images