US946563A - Record-plate for graphophones and like machines. - Google Patents

Description

W. G. RHODES.

RECORD PLATE FOR GRAPHOPHONES AND LIKE MAGHINES.

APPLICATION FILED JAN. 27, 1909.

INYEN T OR I filliam C.Rhodes. BY 9 mm AT "rYa.

WILLIAM c. mropEs, or cLEvEmNn, 01110.

' nEconn-PLATE ronen raoraonns AND LIKE mncnmns.

Specification of Letters Patent.

Patented Jan. 18, 1910.

Application filed January 27, 1909. Serial'No. 474,863.

To all whom 'it may concern:

Be it known that I, WILLIAM O. R:HODES, citizen of the United States, resldmg at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certaln new and useful Improvements in Record-Plates for Graphophones and Like Machines, of

which the following isa specification.

My invention relates to record plates for graphophones and like machines, all substantially as shown and described and particularly-pointed out in the claims.

'In the accompanyin drawings, Figure 1 is a plan view of the p ate or disk, and Fig. 2 is a central cross section thereof.

The plate or tablet D as thus shown is fiat and of disk form, and has a rib or bead 2 upon its face side on a radius approximately one-third the width of the plate from its center, in this instance, and stands above the record surface about as shown in the draw: ings, so that said rib comes about the inner border 5 of record surface 3 and which border or surplus space is usually reserved for possible use in case the matter to be recorded is of exceptional length. The said rib or bead 2 comes about the inner limits of said space 5 while a corresponding border 6 is shown near the outside of the record or inscribed surface 3. The said corresponding border 6 consists of a succession of raised segments 4;, which are relatively as high as rib 2 and run to points at their ends and are separated by fine or narrow correspondingly curved slots or spaces 8 leading in onto the plate from the outside and as deep as said segments. Now, as to the utility and advantages' of these raised portions 2 and 4, it is noted, first, that said rib 2 affords an effectual check or stop to the travel or throw of the needle when it has run its course on the record surface and which would continue to travel or be thrown inward toward the center of the plate if there were nothing to stop it. Heretofore, in flat plates, the sole dependence of the machine to avoid this and consequent danger or injury to the diaphragm or sound box by contact with parts at the center of the plate has been the care or watchfulness of the operator, but this cannot always be relied iipon, especially with inexperienced or forget ul persons, and, in fact, the operator should not and need not be taxed in this way. Hence the conce tion.

worked out by me in or through sai rib fiat record sur or bead 2, which automatically stops the travel of the parts beyond said rib, or its equivalent, regardless of the operator. The machine might run indefinitely and notsus- .tain injury with a precautionary stop of this kind in use. It also serves as a central support for superposed plates to protect the record surface. Final as to segments 4 near the edge of the plate, it will be noticed that they are separated b the said curved slots or channels 8 which begin at the outer side and run/inward onto the surface of the plate the full de th of said segments. Said slots are designe to intercept the needle and lead it in upon the late in case the operator by mistake or care essness starts it outside on the edge 7. If can travel onl will enter the position inside a short distance before it rst lead slot 8 and come into to do its work.

The portion 2 is described as a rib or bead, and such is its referable form, "but if the inner portion of the plate indicated by 410 and extending fora distance about pivot hole 12 in the center of the disk were made relatively as much thicker as said rib this be done the needle indicates and thus produce a shoulder it would serve my purpose measurably as well as a rib so far as orming a stop for the needle .is'concerned and also for rotecting the record surface 3, but it woul add 0bjectionably to the wei ht of the plate and hence is not as desira Again, the exact location of said rib or shoulder is not in itself material provided that it be between the central hole 12 and le as the rib alone.

the inner border of record or engraved surface 3, but a position not far removed from said inner border is deemed best, say about as shown in the accompanying drawings.

What I claim is:

1. A plate for graphophones and the like having a succession of segments near the outer edge thereof standin uniformly above the record surface of the plate and open slots for the needle to run in betweensaid segments the full depth thereof and adapted to land the needle directly upon said record surface from the outside, and a flat annular rim outside said segments even with the slots between the same and needle up to said slots.

2. A grapho hone plate provided with a ace and a series of segments near the outer edge thereof standing higher Q an ames "than saidsurface and curved slots between said segments the full depth thereof forming successive leads for the needle inward onto said record surface and a fiat annular rim next outside said leads and segments,

' and an annular rise next within said record needle upon said record surface and after it 10 leaves the same.

In testimon whereof I afix my signature in presence 0 two witnesses.

WILLIAM c. innonns.

Witnessesz I F. C. MUssUN, E. M. FISHER.

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