US1338620A - Music-machine - Google Patents

Description

D. A. GILLIOM.

MUSIC MACHINE.

APPLICATION FILED MAR. 6. 1918 Patented Apr. 27, 1920.

2 SHEETSSHEET I.

D. A. GILLIOM.

MUSIC MACHINE.

APPLICATION FILED MAR-'61 1918.

1,338,620 Patented Apr. 27, 1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

DANIEL A. GILLIOM, 0F DECATUR, INDIANA.

MUSIC-MACHINE.

Application filed March 6,

To all whom 2'25 may concern:

Be it known that I, DANmL A. GiLLIoM, a citizen of the United States, residing at Decatur, in the county of Adams and State of Indiana, have invented certain new and useful Improvements in Music-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in music machines, and the purpose thereof is to provide an apparatus by which reproductions of graphophones may be made louder and fuller so as to produce a more realistic effect.

In the accompanying drawings forming a part of this application, and in which similar reference symbols indicate corresponding parts in the several views: v

Figure l is a perspective View of an apparatus constructed in accordance with my present invention.

Fig. 2 is a similar view taken from the rear of the apparatus and with the rear door open.

Fig. 3 is a fragmentary vertical sectional view through the apparatus.

Fig. 4 is a horizontal sectional view taken on the line 4=4 in Fig. 3; and

Fig. 5 is a similar view taken on the line 55 in Fig. 3.

Referring more particularly to the drawings, the apparatus comprises a suitable cabinet 1, in which, if desired, graphophone records may be kept. The cabinet 1 is accessible through a door 2 shown in Fig. 1.

lVithin the upper part of the cabinet 1, as shown in Fig. 3, is a box 3 in which is contained the mechanism for rotating the turntable 1, which is placed above the top 5 of said cabinet and operates in a compartment 6 above the same. This compartment 6 is closed by a rear wall 7 and by side walls 8 and 9, the latter being preferably perforated as appears in Figs. 1 and 2. A fall board 10 provides for closing the front of the compartment 6; this fall board 10 being hinged, as indicated at 11, to the top 12 of said compartment 6. The fall board assumes the position shown in Fig. 3 when lowered and preferably carries a hinged extension 13, which has a shoulder 14 resting upon a ledge 15 running about the front part and partially about the sides of the com- Specification of Letters Patent.

Patented Apr. 27, 1920.

1918. Serial No. 220,842.

partment; said ledge being supported upon the top 5 of the cabinet 1.

At 16 is indicated the usual vibrating arm, which carries the needle or stylus 17 adapted to run in the groove of the record 18 shown resting upon the turntable 4. The arm 10 is carried by a tone arm 19. In this instance the rear end of the tone arm 19 is coupled to the forward branch of an elbow 20 which passes down on one side beneath the top 5 of the cabinet, and has its rear branch extending upwardly through said top; the upper end of this last mentioned branch receiving the smaller end of the horn or amplifier 21. The horn 21 employed in the present invention, is of unusual length, being relatively small at the mouth 22 thereof and having a generally conical form with the exception that the rear wall 23, best shown in Fig. 4, is flattened and made to lie very close to a rear sounding board 24.. The flat condition of this rear wall 23 of the horn or amplifier admits the projection of numerone sound waves very close to and against this rear sounding board 21. The sounding board 24: is mounted in a frame which carries a number of steel wires 25 passing in a vertical direction from the upper to the lower part of said frame and over a bridge 26 which rests upon said sounding board 2 1. These steel wires are shown in Fig. 2 to be four in number, which is found satisfactory, and to be connected to turning pegs or pins 27 which admit of varying the tension of the wires 25 and consequently of adjusting the bridge of the sounding board 2%.

In Fig. 2 this sounding board is shown to be accessible through a rear door 28 which is opened when adjustment or removal of the board, or any of its parts, is desirable. The sounding board 21 is contained in the rear part of a sounding chamber 29, formed between side walls 30 and 31 and a front wall 32 in combination with the rear door 28, which is normally closed to prevent the escape of sound in-thisdirection.

The front wall 32 is provided with an opening 33 of large dimensions and prefer ably circular to provide for the passage of the sound waves; while the side walls 30 and 31 are formed with pairs of smaller openings 34 and 35 located one vertically above another. The top part of the sounding chamber 29, which is closed by a top board 36, is made to contain a sound drum or box 37, the lower wall 38 of which is pierced centrally by a perforation 39, for which see Figs. 3 and 5. This lower wall 38 provides an upper sounding board and is equipped with the two bridges l0 and ll, located to opposite sides of the opening 89, and engaged by the steel wires 42 and 4:3 which admit of placing the board under the proper tension.

The cabinet may be constructed after any ornamental design desired, for instance that shown in the accompanying drawings.

The action of the apparatus is substantially as follows:

A disk record 18 is placed upon the turntable at in the manner shown, and the turntable t is then put in motion by a spring niotor, or other suitable apparatus contained in the casing 3. T he stylus 17 is allowed to rest in the groove in the record 18, and the reproduction will thereupon take place in the customary manner. This sound reproduction will be transmitted to the tone arm 19, the elbow 20 and the horn 2i. As the sound waves issue through the mouth of the horn they will be projected against both the rear sounding board and the upper sounding board 58, both of which will, in consequence, be set to vibrating and to add loudness and volume to the sound.

I claim:

A phonograph provided with a disk and rotating mechanism therefor, a box inclosing said dish, a second box mounted above the first mentioned her; and provided with a sounding board, the walls of said upper box being perforated, and a horn opening into said upper box, the back of said horn being flattened to lie close to the sounding board substantially as described.

DANIEL A, GILLIOM.

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