US1475937A - Phonograph-record matrix and method and apparatus for producing same - Google Patents

Description

Dec. 4 1923.

J. T. DANIELS PHONOGRAPH RECORD MATRIX AND METHOD AND APPARATUS FOR PRODUCING SAME 1919 2 Sheets-Sheet 1 Filed Sept. 30 1 l/ l l Igzi M MM INVETOR.

M ATTORNEYS.

Dec. 4 1923 1,475,937

J. 'r. DANIELS PHONOGRAPH RECORD MATRIX AND METHOD AND APPARATUS FOR PRODUCING SAME Filed Sept. 30 1919 2 Sheets-Sheet z E QMWMM i M INVNTOR.

Patented Dec. 4. 1923.

UNITED 5mm PATENT QFFICE.

JOHN THOMAS DANIELS, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE HANSON 6'0 VAN .WINKLE (10., OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PHONOGRAPH-RECORD MATRIX AND METHOD AND APPARATUS FOR PRODUCING SAME.

Application filed September 30, 1919. Serial Nd. 327,471.

To all-whom it may concern:

Be it known that I, JOHN T. DANIELS, a citizen of the United States, residing at Newark, county of- Essex, State of New Jersey, have invented a certain new and useful Improvement in Phono aph-Record Matrice's and Methods and pparatus for Producing Same.

My invention relates in general to the productlon of .disc records for phonographs and more particularly to the matrix from which the records are made.

In the usual process of making these records, an impression of the sound vibrations is taken 'in wax or other pliable material, after which the soft record is made electrically conductive on this surface and the hard material deposited thereon. The deposited material is then stripped from the original soft record and may for example be used directly for the impre$ion of the multiple co ies in a suitable composition disc for s e. My invention provides an improvement .in this general process. The matrix above referred to when produced according to the usual electroplating process does not lie pprfectly flat but has produced upon it, by t e electrolytic action, a series of circular waves"; or undulations concentric with the center of the matrix. Apparently from this cause, uneven tensions are set up in the thin metallic structure and the matrix tends to buckle. Furthermore the uneven thickness, over difierent portions of the matrix, renders it impractical to take even impressions from it, as unequal pressures are transmitted by the different thicknesses.

According to my'mvention the matrix is apparentlyf equal tension throughout and has no tendency to buckle when stripped from the soft impression on which it is deposited. It. rests perfectly flat, and is of constantly. uniform thickness throughout, with the exception of the extreme periphery which is readily trimmed ofi or otherwisemanipulated to obtain the uniform thickness to the ve edge. I accomplish this result I) what. 'believe to be a new method of e ectroplating and by the use of apparatus which constitutes an improvement'over the prior art. An important featurev of the method and apparatus is to be found in -the peculiar movement given to the cathode during the deposition of the matrix thereon. The invention will be clearly understood from the description of one or two embodiments thereof, illustrated in the accompanya ing drawings.

In said drawing:

Figure 1 is a. diagrammatic view partly in vertical section of one form of apparatus which may be employed.

Figure 2 is a plan view thereof.

Figure 3 is a vertical section taken parallel to the plane of the matrix showing the construction of operating member by which the desired .movement of the cathode may be set forth in U. S. Patent 1,352,328 to Todd and King and obtainable in the market under the name Capitol. The anodes 12 of nickel may be hung from the anode bars or rods 13 at two sides of the tank, with suitable space between the two groups of anodes to accommodate the cathode between them. In the example shown, the cathodeis in the form of two discs 14 (Figs. 1 and 2) which are hung from an operatin member, the construction of which will be better understood from Figures 3, 4 and 5 of the drawing. Referring to these figures the operating member is shown as comprising two elongated bars or strips 15, of insulating material, which are suitably recessed to have mounted within or between them the conducting bar or strip 16, the lower end of which is bifurcated or provided with a fork 17 within which is mounted a worm gear 18, whose shaft 19 projects from the opposite faces of the operating member 15 and serves as a conducting and rotating support for the cathodes 14. The upper end of the conducting bar 17 may have a transverse conducting pin or trunnion 20 pro-- jecting through the two faces of the operating' member 15 and adapted to rest in slots or notches 21 formed in tlie bifurcated end of an operatinglever 22. (Fig. 1) which in the example vshown is fulcrumed in the bracket 23, and oscillated by an eccentric mechanism 24, whose-pin 25 rides in the slotted outer end 26 of the ope-ratin lever 22. Electrical connection may be. ma e with the pin 20 by means of conductor 28., so that the current from the cathodes 14 passes thru shaft 19, worm gear 18, fork 17, bar 16, and trunnion 20 from which the conductor 28 leads back to the source.

The'operating' member 15 is also provided with the rotary longitudinal shaft 29, which Y odes, as indicated by the dotted circle in Fig-.

has a worm 30, secured on its lower end, in mesh with the worm. gear 18. The upper end of shaft 29 projects beyond the top of operating member 15 and has fixed thereon a ratchet wheel 31 with which a pawl 32, mounted adjacent .theretoon the top of operating member 15 is resiliently held in engagementby means of its leaf spring 33. The operating lever 22 is provided near its free end with a bracket 34 on"wb'ich' is mounted a pawl 35, normally held in position by springs 36 to engage with the teeth of ratchet wheel 31. During the oscillation of operating lever 22 the operating member 15 assumes a pendulum motion upon its trunnion 20 which causes the ratchet wheel 31 to swing past the operatino pawl so that the shaft 29 is turned a slight distance with each swing of the pendulum.

The entire operation will now be apparent. Eccentric mechanism 24 is set in motion, the current-is permitted to flow from anode bars 13. and anodes 12 thru the solution 11 and cathodes 14 and so forth. as already described. As the eccentric mechanism rotates, the operating lever 22 swings up and down, causing movement of the trunnions 21 upon an arc whose center is in the fulcrum or axis of the lever 22. This motion not only causes the cathodes to rise and fall, but by reason of the angular motion imparted to the trunnions 21, a transverse or pendulum swing is also taken on'by the cathure 1. Inaddition'to'this more or less circular motion of the cathode axis, the cathode is at the same time iven a step by step movement about its axis 19, due to the rotation of the shaft 29, at each engagement ofpa'wl 35 with the ratchet wheel 31. The movement of the cathodes is thus in the nature of a planetary motion, their axis in general describin a circular movement while the discs themse ves turn about their axis. The resulting effect of this is to permit the de osition of metal to occur in a uniform an apparentl grain all directions within the plane of the deposits. It builds up evenly over substantially the entire surface and shows no undulations or waves which might cause unequal stresses and result in a structure homogeneous structure, with the tending-to buckle when stripped off. The

deposit may perhaps be regarded as laminated in microscopic layers, with the grain on each layer extending at an angle to that of the next layer due to the. fraction of a turn given the disc at each actuation of the ratchet wheel 31. I I

In practice the first deposition may advantageously be nickel and after a firmly coherent layer of nickel has been built up, a

diagrammatic view of another mechanismv for obtaining substantially the same result. Here it will be understood-thatthe tank 40 is filled with solution as before and the electric circuits similarly arranged, and the .only. difference being in the mechanism imparting the planetary motion of the cathode. In this instance an operating disc 41 has the operating member 42 swing from an eccentric pin 43 which thus describes a circular movement and while causing the cathode to rise and fall as well as move from side to side in the solution, this movement brings the ratchetwheel 44 into engagement with .the fixed pawl 45, so that with each rotation of the disc 4.1,the ratchet wheel is turned one step and the cathode discs are caused to turn a corresponding distance about their axis as before.

The constructions above described are only by way of example as it will be apparent to those skilled in the art that the desired movements of the cathode can be secured in agreat many difi'e'rent ways.

I claim:

1. An electro-deposited matrix -for phonographic disk records, the material of said matrix being of substantially uniform tension in all directions when the matrix surface is all in one plane, thereby avoiding a tendency to buckle.

2. A matrix of the character described,

istributed uniformly and evenly in comprising a substantial] flat disc, having phonographic disc records, .which comprises depositing the same from an electrolytic 4. The method of producing matrices forphonographic disc records which comprises bodily moving the. submerged cathode relativel to the anode, while simultaneously turning the cathode upon its axis.

.5. Apparatus of the character described comprising in combination suitably disposed anode material, a cathode, suitable electrical connections, and means for imparting to said cathode combined bodily and rotarymovement relatively to said anode material.

6. Apparatus of the character described comprismg in combination electrically connected anode and cathode materials, and means for impartin planetary motion to said cathode materia l.

7. The method of treating articles which electroplating bath and rotating the articles while in transit through the bath to agitate thev bath material.

. 8. The method of treating articles which comprises passing the articles through an electroplating bath and impartin reciprocatory and rotary movement to 'e articles while in transit through the bath to thereb agitate the bath material.

9. A process for the production of metal sheets, wire, tubes, cylinders and other articles wherein the cathode has imparted to it an oscillating or reciprocating motion in the electrolyte substantially as described.

10. A process ior the production of metal sheets, wire, tubes, cy'linders and other articles wherein the cathode has imparted to it an oscillating or reciprocating motion and also a continuous or intermittent rotary motion, in the electrolyte, substantially as described.

JOHN THOMAS DANIELS.

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