US739713A - Metal matrix for forming duplicate sound-record cylinders. - Google Patents

Description

PATENTED SEPT. 22,- 1903.

. A. N. PETIT. METAL MATRIX FUR FORMING DUPLICATE SOUND RECORD CYLINDERS.

APPLICATION FILED MAY 15, 1902.

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No. 739,713; PATENTED SEPT. 22, 1903. A. N. PETIT. METAL MATRIX FOR FORMING DUPLICATE SOUND RECORD CYLINDERS.

APPLIGATION 211.21) In 15, 1902.

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UNITED STATES Patented September 22, 1903 PATENT OFFICE.

ADEMOR N. PETIT, or NEWARK, NEW JERSEY, ASSIGNQR TO THE INTER- NATIONAL PHONOGRAPH AND INDESTRUOTIBLE RECORD COMPANY,

LIMITED, OF LIVERPOOL, ENGLAND.

META L MAl'RlX FOR FORMING DUPLICATE SOUND-RECORD CYLINDERS.

SPECIFICATION formingpart of Letters Patent No. 739,713, dated September 22, 1903. Application filed May 15, 19b2 $erial No. 107,464. (No model.)

To all whom it may concern: 7

Be it known that LADEMoR N. PETIT,a citizen of the United States, residing atNewark, in the county of Essex and State of New Jersey, have invented an Improvement in Metal Matrices for Forming Duplicate Sound-Record Cylinders, of which the following is a specification. p

The object of my invention is to produce a to superior matrix adapted to form a more perfect and commercial duplicate sound record of cylindrical form and preferably made of celluloid than it has heretofore been possible to produce in an effort to overcome the harsh 5 and grating sounds usually incident to records of sound in celluloid or similar materials.

In carrying out my invention I employ a master sound-record upon a cylinder of wax or other similar or suitable composition and 20 prepare the surface for electrodeposition of a metal, such as copper, with a suitable conductive material. A suitable support is provided for the wax or other similar composition record and means for suspending the 2 5 same in the bath in which the electrodeposition takes place. This support and the record during the electrodeposition of metal may be rotated, as I have discovered that superior results are obtained by revolving the record during the electrodeposition of the metal, as

the same obviates any tendency to granulation.

A suitable apparatus is provided not only for the support of the record during its rotation, but for the electric apparatus conducting the current. I prefer to provide a suitable support for one end of the wax or other similar composition record, and the respective ends of the record are preferably surrounded by ring-like parts which form permanent portions of the matrix and are connected by the metal electrodeposit upon the surface of the wax or other similar composition record. These ring-like ends are both peculiarly formed for this purpose, and I prefer to insert between one of these rings and one end of the wax cylinder a device carrying the name of the record and which afterward gives form to the cylindrical and duplicate soundrecord formed in the matrix. After the ma- 5o trixis formed and the wax record broken out or otherwise extracted therefrom the same is ready for the reception of the celluloid blank or blank of other suitable material which is to receive from the matrix the soundrecord impressions from the inner surface thereof. The apparatus and the method of forming the duplicate sound-record cylinder in this matrix forms the subject of a separate application for Letters Patent of even date herewith.

In the drawings, Figure 1 is a vertical section showing the wax or other composition cylinder upon which is formed a master sound-record and the parts associated there- -with preparatory to electrodepositing metal upon the surface thereof. Fig. 2 is a plan of the name or title ring. Fig. '3 is a vertical section of the matrix complete. Fig. 4: is a similar vertical section showing the celluloid blank placed within the matrix before the same is connected up in the apparatus described in said copending application. Fig.

5 is an inverted plan of the ring or annulus at 'the'upper end. Fig. 6 is a vertical sectioncf a modified form of theinvention,

showing the parts assembled for insertion into the chemical bath for the electrodeposition of the metal; and Fig. 7 is a vertical longitudinal section of a modified form of 8c the invention, showing the wax cylinder upon which is the master-record suitably mounted for rotation in the chemical bath during the electrodeposition of the metal .upon the surface thereof. The wax cylinder a is of usual material and construction, with an engraved surface of a master sound-record, and the inner walls thereof may be parallel or tapering, as desired. The surface of this cylinder at is prepared with conductive material at 2. I provide a support or base I) for use during the electrodeposition of metal; also, a ring or annulus c, of metal, receiving the lower end of the wax cylinder a, and a ring or annulus d, of 5 metal, at the upper end of the wax cylinder, said parts (2 and d forming limit-gages at the ends of the wax cylinder and also permanent ends for the matrix. The base I) is provided with screws 4:, passing through the same into interiorly-threaded openings in the ring or annulus 0, whereby the two parts are re|nov ably connected; There are screws 5 in the base band in the ring or annulus d, to which cireuitwires 6 are connected for conveying the electric current in the liquid bath or battery for the eleetrodepositiou of the metal, and these circuit-wires (i may also be suspending devices for said parts in said bath. The upper end of the wax cylinder at is preferably recessed, and I prefer to provide a name-plate 3, preferably of wax and adapted to fit into the upper end of the wax cylinder to close the same and also form a support and a centering structure for the metal ring or annulus cl. This ring or annulus (Z is cutaway on the under side from the periphery toward the center, so that when in place, as shown in Fig. 1, there is an appreciable space formed toward the axial center of the parts, said ring or annulus being of greater diameter than the wax cylinder a. The central opening of the ring or annulus 0, receiving the lower end of the wax cylinderct, is outwardly flared or tapered,

providing an annular wedge-shaped space be-v tween the surface thereof and the surface of the wax cylinder.

In forming the matrix in the bath by the action of the electric current the metal, such as copper, is not only deposited upon the conductive-material surface of the Wax cylinder a and the surface of the name-ring 3, similarly prepared, but is also deposited upon the flared surface of the open center of the ring or annulus cand the undersurface of the ring or annulus cl, it being understood that the other metal surface of the associated parts are to be covered with varnish or some other material to prevent the electrodeposition of metal, except at the places desired and hereinbefore stated. The metal is to be deposited until it assumes a thickness substantially agreeing with the diameter of the ring or annulus d, after which the electrodeposited cylinder c, with rings or annuli c d, form an integral structure, which constitutes the matrix for further use and from which the wax cylinder with the record is broken out after removing the base or support 17. This matrix is shown in Fig. 3, in which it will be noticed that the opening at the lower end is of the full diameter of the matrix, while the opening at the upper end is contracted and governed by. the aperture in the ring portion (1.

The celluloid blankf or blank of other suitable material is preferably made with one end turned over and the other end inturned, and this blank is appreciably smaller than the internal diameter of the matrix and is passed into the same from the lower larger end, (see Fig. 1,) it being understood that the turned-over end of the blank comes against the upper inclined portion of the matrix, at which place the matrix shows the name in relief.

In the modified form of my invention shown in Fig. 6 the base 12, similar to the base I), hereinbeforedescribed,is provided with a core b integral therewith or connected thereto, and both parts are preferably of insulating or non-conducting material, and to the same is advantageously secured a screw-eye 7, from which the parts collectively are advantageously suspended in the bath or battery during the electrodeposition of metal. In this figure the wax cylinder at, with a conductivematerial surface, the ring or annulus c, and the screws 4 are the same as the parts hereinbefore described. Upon the upper end of the core I) I secure a ring d or its equivalent structure, provided with several radiating fingers 8, made integral therewith and extending over upon the upper surface of the wax cylinder at in contact with its conductive surface. This ring is preferably fastened to the core by screws 9, which also serve as binding-posts for the circuit-wires 10. Secured to the ring or annulus c are screws 5 and circuit-wires 6, similar to those parts employed in Fig. 1, the screws 5 and wires 6 and the screws 9 andwires 10, together with the ring (1 and the fingers S, constituting devices for a complete electric circuit through the annulus c and the conductive-material surface 2 of the cylinder.

In the modified form, Fig. '7, the base I) and the core I) are centrally perforated for a shaft 11, the same being rotatably hung in arms 12, suspended from any fixed point, said shaft being provided with a nut 14 to clamp the base b and core 11 to the shaft and between a collar thereon and said nut, and on. this shaft is preferably placed a pulley 13, surrounded by a band for rotating the shaft, the base 17, core b the ring or annulus c, secured thereto by the screws 4, the Wax cylinder a, surrounding the core 19 and a ring (1 placed against the right-hand end of the core b and held thereto by the clamping of the nut 14. The said ring 01 substantially agrees in diameter with the full diameter of the finished matrix, and in order to bring to the ring d and the ring or annulus c the electric current in suitable form I provide brackets 1516 upon the arms 12 and spring-contacts 17, which run upon the surfaces or peripheries of said ring or annulus c and the ring 01 during the rotation of the parts in the bath or battery. The arms 12 are to be constructed for the readyseparation therefrom of the base 6, core b and base connected therewith, so that the finished matrix may be removed and the wax cylinder broken out therefrom.

The matrix made as hereinbefore described is substantial, strong, and lasting and eminently adapted for continuous and repeated use in the manufacture of duplicate soundrecords of celluloid or other suitable materials.

I have discovered that in the elect-rodepo- 'sition of the metal upon the surface of the master-record when the same is in the bath the best results are obtained by starting the operation with one circuit-wire at one end until a substantial or appreciable thickness is obtained, because the electric action is continuous from one end to the other, whereas when two circuit-wires are employed the action of deposition is from both ends to the center. This latter manner of operation is satisfactory after the appreciable foundation is made, whereas if the action is commenced with two wires there will be an appreciable central line as a result, which is consequently detrimental.

I do not herein limit myself to the arrangement or number of the electric wires or circuits or to the metal end rings to which the electrodepcsited metal unites when the parts are revolved in the bath or battery for form'- ing the matrix and which constitute a part of the matrix. I

I claim as my invention 1. The combination with a base and a wax record-cylinder having a conductive-material surface, of a ring or annulus of metal secured to the base receiving one end of the recordrecord-cylinder having a conductive-material cylinder and having a tapering central sur face adjacent to the record-cylinder, a ring or annulus and a support for the same at the upper end of the record-cylinder, said ring having a tapering under surface and a body of electrodeposited metal upon the surface of the record-cylinder at its ends joining the said rings or annuli and therewith forming an integral matrix, substantially as set forth.

2. The combination with a base and a wax surface, of a ring or annulus of metal secured to the base, receiving one end of the recordcylinder and having a tapering central surface adjacent to the record-cylinder, a ring or annulus and a support for the same at the upper end of the record-cylinder, said support having an inclined outer surfaceengraved with the name of the record, which name is afterward transferred to the inner surface of the matrix, said ring having a tapering under surface and a body of electrodeposited metal upon the surface of the record-cylinder at its ends joining the said rings or annuli, the said rings or annuli therewith forming an integral matrix, substantially as set forth.

3. A metal matrix adapted for the reproduction of duplicate sound-record cylinders of celluloid orsimilar material, the same comprising ends formed of metal rings or annuli and an intermediate portion of electrodeposited metal joined therewith by the electrodeposition of, the metal as an integral whole.

4. The combination with a base and a wax record-cylinder having a cond native-material surface, of a ring or annulus of metal secured to the base receiving one end of the recordcylinder and having a tapering central surface adjacent to the record-cylinder, a body of electrodeposited metal upon the surface of the record-cylinder joining the tapering central surface of the ring or annulus at one end and therewith forming an integral matrix.

5. A metal matrix adapted for the reproduction of duplicate, sound-record cylinders of celluloid or similar material, the same comprising a ring or annulus and a body portion of electrodeposited metal joined thereto at one end by the electrodeposition of the metal and constituting an integral whole, substantially as set forth. a

Signed by me this 6th day of May, 1902.

ADEMOR N. PETIT.

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