US787765A - Phonograph. - Google Patents

Description

No. 787,765. PATENTED APR. 18, 1905.

- E. A. IVATTS.

PHONOGRAPH.

APPLICATION FILED FEB. 16, 1904.

mun-munwn I J UNITED STATES Patented April 18, 1905.

PATENT OFFICE.

ERNEST ALBERT IVATTS, OF PARIS, FRANCE, ASSIGNOR TO LA UOMPAG- NIE GEN ERALE DE PHONOGRAPHES, (JINEMATOGRAPHES & APPAREILS DE PRECISION, OF PARIS, FRANCE.

PHONOGRAPH.

SPECIFICATION forming part of Letters Patent No. 787,765, dated April 18, 1905.

Applicatiop filed February 16,1904. Serial No 193,814.

To all vii-72 0171 it may concern:

Be it known that I, ERNEST ALBERT IVATTS,

- engineer, a citizen of Great Britain,- residing at Paris, in the Department of the Seine, France, have invented new and useful Improvements inand Relating to Phonographs and the Like, of which the following is aspecification.

The subject of this invention is a movable support for the sound-horns of phonographs and like talking-machines.

The improved support is characterized by the feature that it is capable of movement and follows the movement of the diaphragm, which movement is facilitated by the use of a roller on a suitable part of the support. The bad effect of a very long lever or arm on the receiving or recording diaphragm is thus avoided.

In the drawings forming part of this specification, Figure 1 is an elevation of the support shown applied to an ordinary phonograph, and Fig. 2 is aplan view of the same.

The born 1, to which is attached the diaphragm 2 or the cell containing the same,carries a knuckle or the like joint or piece 3, capable of permitting the adjustment of the said horn in the vertical direction. The said knuckle-joint is made of two parts pivoted to each other, as shown, the upper part being secured or otherwise connected with the horn and the other part being held either rigidly or adjustably by screws or other convenient devices in a hollow socket or holder 4, which forms part of or is attached to the bar or rod 5. This bar or rod passes within a socket 6, which is furnished with a set-screw, so that the rod may be adjusted for the purpose of lengthening or shortening the support. On this bar is mounted a movable roller 7, running on the upper rail of the frame 8, fixed in any suitable manner to the frame of the phonograph. The upper bar of the frame 8 serves as a rail or runner to the roller 7 and should always be parallel to the axis of the record or like cylinder.

The bar is adjustable in the end of the frame 9 and practically forms a part thereof.

Said frame may have the special form indicated by the drawings or maybe of any other form which allows of the movement of the diaphragm in the middle of the frame in such a way that the diaphragm engages easily with the cylinder during its movements,and so that the protection for the cylinder, stylus, and diaphragm may be secured by making the diaphragm or the cell containing it rest in or on one of the loops or sides 10 or 11 of this support.

A cap or the like 12,suitably formed, causes the frame or support 9, and consequently the horn, to move longitudinally of the cylinder. The same is engaged by the traversing-screw of the apparatus, the pitch of the screw being in agreement with the helices or grooves of the cylinder. It will be plainly seen that when the cap moves synchronously with respect to the rotary movement of the cylinder it carries with it the frame or support 9, the bar 5, and the horn 1, and the effect of the very long arm or lever formed by this last and the vibrations caused by this displacement are avoided as a result of the bar 5 being held and moved by the roller 7;on the rail 8. It follows,therefore,that the stylus of the diaphragm will follow faithfully all the details of the grooves upon the record-cylinder by reason of the elimination of all lateral vibrations common with supports now in use, and the maximum correctness of rendering can be thus obtained from the apparatus without perversion of the recorded sounds.

It will be evident that the principle of this support can be equally well applied to the recording of sounds as to their reproduction.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. A support for the horn of aphonograph mounted for movement longitudinally of the cylinder, the support being hollow for the reception of the diaphragm, and having an arm or extension thereon for the support of the horn at its enlarged end.

2. A support for the horn of a phonograph the horn at its enlarged end, a roller carried by said support at a point intermediate its ends and a supporting-rail on which said roller bears. 7

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERNEST ALBERT IVATTS.

Witnesses:

HANSON G. (Joxn, HENRY DANBERY.

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