US903198A - Producing phonographic records. - Google Patents

Description

I. KITSEE. PRODUCING PHONOGR APHIG RECORDS.

APPLICATION FILED M316, 1908.

903,198. Patented Nov. 10,1908.

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IBIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA.

PRODUCING BHON'OGRAPEO RECORDS.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed larch 6, 1908. Burial Ho. 419,578.

To all whom it may concern:

Be it known that I, Ismon Krrsnn, a citizen of the .United States, residing at Philadelphia, in the county of- Philadelphia and State of. Pennsylvania, have invented certain new and useful Improvements in Pro ducing Phonographic Records, of whichthe following is a specificati n. 1,

My invention relates 0 an improvement in producing phonographic records. Its object 'is to produce such records in a simple and efiicient manner. 1

In practicin this, my invention, I. prefer to make use 0 a vibrating diaphragm with the aid of which a non-conduct' .material is deposited on a conducting sur ace in accordance with the vibrations of said diaphragm produced by the generated sound plan view in waves.

In the drawing i re 1 is a conventional form ifiiistrating the conducting material on which the lines of record are later on to be marked. Fig. 2 is a similar view of the same material with the sound record marked thereon. Fig. 3 is a similar view of the conducting material having marked thereon the lines of record and provided with the electro-plate' as later on to be more fully explained. Fig. 4 is a cross section' of a recording mechanism pro vided with the referred means of depositing the materiaPon the conducting plate.

1 is the conducting support; 2 the lines of record and 3 the electro-deposit on said ate. p In Fi 4, 5 represents the mouth i ec'e; 6 the diap ragm; 7 the stylus attache to the diaphragm. This stylus is here partially sup orted by the movable lever 8 attached to t e bar 9 held in position here by the support 10. 11 is the reservoir conta" the non-conducting fluid 12. 13 is the fluid outlet here shown as connected with the res-- ervoir with the interposition of the flexible tube 14. 15 are the means to stop the flow of the fluid.

The modus operandi of practicing this,

my invention, 13 as follows :A metallic face wit vibrating dia hragm of a phono raphiq transmitter. s stated above, I pre er'that this material should be deposited without necessitating the actual contact of the stylus with the plate whereon such material has to be deposited. I, therefore, produce a liq uid or fluid in a. manner so that the same should be non-conducting. .I have tried different fluids and found that either a solution of shellac in alcohol, or a solution of rosin in hydrocarbon will answer for all, practical purposes.

Lprefer that the stylus, which is supported by the vibrating diaphra m'of a recorder, should be provided with an orifice and should .be in operative relation with a reservoir containing the necessary liquid or fluid. Beneath this orifice, I place the metallic plate adapted to receive the record. The non-conducting fluid or liquid should issue from the reservoir .in a very thin stream; and as the stylus with its orifice has to vibrate in accordance with the vibrations of the diaphragm proper, it is obvious that the liquid or.fl1i1d will be deposited on the solid surface in a manner so as to reproduce these vibrations. After having deposited thereon the required recording lines, the conducting plate is subjected to the process of electroplating. As againstated above, I prefer to use a copper plate and I also prefer to electro-plate the same with an additional copper. The mode ofproduci such electro-deposition is well known. he plate is made the cathode in an electrolytic apparatus in which the electrolyte consists of a solution of sulfate of copper. This anode is a copper in convenient form. When a plate, prepared as above, is subjected insuch apparatus to the action of the current, the copper will be deposited only on such parts of the surface of this plate as are conducting, but such partsas are made nonconductin will be left free from the deposit; an as the lines of record are nonconducting, it is obvious that these lines will remain free from the de sit. A plate therefore, having the lines 0 record marked on its surface with a non-conducting material will, after it is taken from the electrolytic ap 'aratus, have all parts of its surh the exception of such parts which re resent the lines of record, raised. The height between the lines of record and the other parts of the late will, therefore, be differentiated and t 0 lines of record themselves will look as being in intaglio or depressed as to the other partsof the surface. From such a plate, copies can then be made in accordance with any of the well known methods.

I have illustrated and described one apparatus with the aid of which the lines of.

I cordance with the vibrations of a diaphragm actuated by said sound wav s, and causing to be dilferentiat'ed the height of the lines of record and the height of the remaining parts of the surface of the conducting material through the process of electro-deposition.

2. In the production of sound records, the method which consists in first recording the sound waves upon a suitable surface, and electro-plating upon the parts of the surface upon which no record has been made.

3. As a new article of; manufacture, a phonographic record comprising a conducting support, lines of record thereon and a metallic deposit on all' parts of the surface of said support with the exception of those parts which are covered by the lines of record.

In testimony whereof I aflix my signature in presence of two witnesses.

ISIDOR KITSEE.

WVitnesses:

EDITH R. STILLEY, MARY 0. SMITH.

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