US628813A - Sound recording and reproducing machine. - Google Patents

Description

N0. 628,8!3. Patan ted July ll,. I899. H. JONES.

SOUND RECORDING AND BEPROOUOING MACHINE.

(Application filed Dec. 17, 1898.) (No Model.)

M VIIIIIIIIIIl/Illlllllllllllllllllzfi W Q A Uniirn Tarts HENRY JONES, OF PHILADELPHIA, PENNSYLVANIA.

SOUND RECORDING AND REPRODUCING MACHINE.

SPECIFICATION forming part of Letters Patent No. 628,813, dated July 1] 1899.

Application filed December 17, 1898. Serial No. 699,555. (No model.)

To aZZ. whom it may concern:

Be it known that I, HENRY JONES, a citizen of the United States, and a resident of the city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Sound Recording and Reproducing Machines, of which the following is a'fnll, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification.

My invention relates to certain improvements in gramophones and other sound recording and reproducing machines of a like nature; and the principal object of my said invention is to improve the construction of the recording and reproducing mechanism, especially that part known as the sound-box and stylus-supporting bar, by means of which the sound delivered from the receiver is greatly improved and a clear and distinct articulation obtained.

lVith this object in view my invention consists in providing a simple and efiicient means for securing the diaphragm in the sound-box, whereby it can be easily and quickly removed and replaced without unscrewing any of the parts.

My invention further consists in providing a sound-box constructed in sections and having the different sections insulated from each other, so as to prevent any harsh or metallic sounds that might emanate from the stylusbar and stylus-point from being communicated to the receiver.

My invention still further consists in an improved construction of stylus-bar and the manner in which it is secured to the soundboX frame, and also in providing an improved spring or springs connected to the said stylusbar and to the sound-box frame for returning the said stylus-bar and diaphragm to normal position after it has been acted upon under the impulses of the sound-waves produced through the styluspoint.

My invention further consists in the construction, combination, and arrangement of the different parts, such as will be hereinafter fully described, and particularly pointed out in the claims made hereto.

In the accompanying drawings, which form a part of this specification, and in which similar letters of reference are used to indicate similar parts, Figure l is a front elevation of a sound-box and stylus-bar embodying my invention. Fig. 2 is a central sectional view taken on the line 2 2 of Fig. 1., having a sleeve for holding the stylus-point omitted. Fig. 3 is a side elevation of the sound-box having the bracket for supporting the stylus-point removed and illustrating the springs for returning the stylus-bar and diaphragm to normal position. Fig. 4 is a view similar to Fig. 3, illustrating a modified arrangement of springs. Fig. 5 is a detail perspective illustrating the knife-edge bearings between the stylus-bar and the sound-box frame. Fig. 6 is a detail perspective view of one of the springs for 'the stylus-bar. Fig. 7 is an enlarged detail section through the knife-edge bearings.

In carrying out my invention I provide a sound-box A of the ordinary shape and size, provided with the usual tubular sleeve A for connection with the trumpet or other receiver. The front part of the said sound-box A is formed of an independent box or ring a, open in front and having its outer rim or flange curved or bent over, as illustrated at a in Fig. 2 of the drawings. A circular tube or gasket a is fitted against the back of the box a, against which rests the diaphragm B, and a second rubber tube or gasket a is fitted on the other side of the said diaphragm B and held in place by means of the bent or rounded edges a of the box-rim. These rings being of flexible material, it will be readily understood that by contracting them they can be easily removed from the sound-box frame and the diaphragm B released. The section b of the sound-hox consists of a metallic disk having formed integral therewith the tubular sleeve A. Between this and the section a is interposed a ring 0, of rubber or other so u nd-non-conducting material. A metallic ring d, having an opening in its center through which the tubular section A passes, is provided, and interposed between this section d and the section b is a ring c of soundnon-conducting material. The sections a, b, c, d, and e are securely fastened together by means of the screw f, and around the apertures provided in the section b is secured a rubber sleeve Z1, as illustrated in Fig. 2 of the drawings. It will thus be seen from the above-described construction that the diaphragm Bis entirely insulated from the son ndbox and that the tubular section A is also insulated from the section a of the sound-box, which tends to minimize or prevent grating or metallic sounds from being transmitted from the stylus-bar to the receiver.

On the lower edge of the sound-box is a projection 0, having a projecting flange c for supporting the stylus-barD. On the lower surface of the flange c are formed knife-edges d, located at each end of the said flange and adapted to fit in V-shaped grooves 0Z formed in the upper surface of the stylus-bar D. These knife-edges 01 may either be riveted in the section 0 or cast therewith or screwed in, as illustrated in dotted lines in Fig. 1 of the drawings. On the edge of the stylus-bar D is a lug e, and on the rear edge of the flange c is a lug e located directly opposite the lug e. To the lug e is secured one end of a flat spring E by means of the screw e while the other end of the said spring E is secured to the lug e by means of the screw 6 This end of the spring E is formed with a forked or slotted portion f, through which the screw 6 passes. A recess or cut-away portion (2 is formed in the stylus-bar D above the spring E, as illustrated in Fig. 2 of the drawings. It will be seen that one end of the spring E is rigidly secured to the stylus-bar at a while the other end is loosely secured in its slot f to the screw 6 which is carried by the lug e of the sound-box frame. A second spring E is provided, located by the side of the spring E, but secured in an opposite manner, as illustrated most clearly in Fig. 3 of the drawings. The rigid end of this spring E is secured to a lug 9, formed on the back edge of the stylus-bar D, while the slotted end f is engaged by a screw g, carried by a lug 9 formed on the front edge of the flange c of the sound-box frame. A cutaway portion 9 is also provided below this spring E. Thus as the stylus-bar D is vibrated by means of the sound-waves transmitted from the record through the styluspoint the springs E E act on the said bar D to return it to normal position, the spring E acting in the one direction, while the spring E acts in the other direction. The knifeedges cl act as pivots upon which the said stylus-bar D swings.

The lower side of the stylus-bar D is secured to bracket H, having formed thereon a sleeve h, adapted to receive the stylus-point I. The set-screw h is provided in the said sleeve h for securely holding the stylusIin position.

In Fig. 4: of the drawings I have illustrated the springs E E as being located on the stylus-bar D near the ends thereof, so as to more evenly distribute their pressure upon the said stylus-bar and at points nearer the pivotal knife-bearings d d When I employ this arrangement, I have both the springs E and E secured at one end to the stylusbar D and having their other ends loosely held by the screws 6 carried by the soundbox frame and exerting their pressure in one direction only.

While I have described and shown the use of the double springs E E and prefer this form, a single spring might be used with good results.

Various slight changes and modifications might be made in the construction of my device without departing from the spirit and scope of my invention. Hence I do not desire to limit myself to the exact construction shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a sound recording and reproducing machine, a sound-box open at its front end, a diaphragm adapted to said sound-box, and a flexible spring-ring adapted to fit snugly in the sound-box for retaining the diaphragm in position, substantially as described.

2. In a sound recording and reproducing machine, a sound-box having a diaphragm located therein, flexible rings located on each side of said diaphragm, and an overlapping rim formed on the sound-box adapted'to partly embrace the outer ring and hold the same in position.

3. In a sound recording and reproducing machine, a sound-box comprising a section, a, a diaphragm located therein insulated from the sound-box, a stylus-bar carried by the section, a, a section, I), having a tubular extension for attachment of the trumpet, a layer of sound-non-eonducting material, 0, located between the sections, a and b, a ring-section, d, and a layer of sound-non-conducting material, 6, located between the sections, 1), and d, substantially as described.

4. In a sound recording and reproducing machine, a sound-box comprising a section, a, a diaphragm located therein and insulated therefrom, a stylus-bar carried by said section, a, a section, 12, having a tubular extension, A, apertures formed in said section for the reception of bolts, sleeves of insulating material provided in said apertures, a section, 0, of sound-non-conducting material located between sections, a, and b, a ring, d, a layer of sound-non-conducting material between the sections, (1 and d, and bolts,'f, for connecting the said sections together, substantially as described.

5. In a sound recording and reproducing machine, the combination with the soundbox and diaphragm, of an extension formed on the lower edge of said sound-box, knifeedges formed in said extension, a stylus-bar having grooves adapted to receive the knifeedges, and springs connected at one end to the stylus-bar and at the other end to the sound-box extension, substantially as de scribed.

6. In a sound recording and reproducing machine, the combination of 'a sound-box and diaphragm, a stylus-bar pivotally connected to an extensionon the sound-box, knife-edge bearings for said stylusdoar, and a pair of flat springs, E, E, one of said springs being rigidly connected at one end to the stylus-bar and loosely connected at its end to the soundbox While the other spring is rigidly connected at one end to the opposite side of the stylus-bar and loosely connected at its other end to the opposite side of the sound-box, substantially as described.

'7. In a sound recording and reproducing machine, the combination of a sound-box, a diaphragm carried thereby, a stylus-bar, knife-edge bearings between the stylus-bar and sound-box, a pair of flat springs, E, E,

each rigidly connected to the stylus-bar, but on opposite sides, having their other ends loosely connected to the sound-box frame on opposite sides, recesses, e and 9 provided in the stylus-bar under the respective springs,

and a bracket, H, secured to the stylus-bar for supporting the stylus-point, substantially as described.

In Witness whereof I have hereunto set my hand this 14th day of November, A. D. 1898.

HENRY JONES.

Witnesses: BENJ. F. PERKINS, HonAcE PETTIT.

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