US282385A - Holder for abrasive disks - Google Patents

Description

(No Model.) A I l L D. SHBPARD..

HOLDER FDR ABRASIVE msKs. Y No. 282,385- 4 Patented July 31l 1`883 UNITED STATES" PATENT OFFICE.

LUTHER n. SHEPAED, E BOSTON, MASSACHUSETTS.

HOLDER FOR ABRASIVE DISKS` sPEcIEIcATIoN forming part of Lea-.ers Patent No. 282,385, dated July 81, 1883. l

' Application filed May 19, 1883. (No model.)

To all whom, t ntaqj con/cern:

Beit known that I, LUTHER D. SHEPARD, of Boston, 'county of Suffolk, State of Massachusetts, have invented an Improvement in Holders for Abrasive Disks, of which the following description, in connection with the ac: companying drawings, is a--speciflcation, like letters on the drawings representing like parts.

My invention relates to means for packing and preserving in good condition abrasive disks, such as are employed by dentists for cutting and polishing the teeth or metal fillings therein.' These disks are generally made of paper or other, somewhat flexible material, to

one side of which powdered glass or emery or other abrasive substances are applied by glue or cement in the usual manner,l and the said disks are in many cases also treated with shellac or other similar material to give the disks the requisite stiffness. Disks treated in this manner,` if left to themselves, `will become warped or bent, and consequently will not run true when rotated in the lathe or engine Such warping is obviated by the holder forming the subject of the present invention, by means of which the disks are retained perfectlyflat and occupy the least possible space, they forming a package that may be conveniently handled or packed for shipment.

The package or holder consists, essentially, of two rigid plates or followers,preferably of the saine shape and a triiie larger than the disks which are to be packed between them, combined with springs tending to draw the said plates toward one another to compress the disks packed between them, and thus retain them perfectly fiat, and a central spindle to keep the said disks :in coincidence with one another. The plates are provided with ears or lugs to receive the springs, which extend along the sides of the cylindrical pile of disks, and the Spindle or wire is run through the central openings of the disks by which they are to be subsequently applied to the mandrel of the engine. 4

Figure l is a plan view, and Fig. 2 a front elevation, of a series of disks packed in a holder in accordance with this invention.

The holder consists of two rigid plates, a b, preferably a trifle larger in diameter than the disks, c, to be packed and held between them. The said plates a b are provided with ears or hooks d, to receive the ends of springs e, (shown in this instance as rubberbands,) by whichthe said plates are drawn toward one another and compress the disks c between them, preventing the said disks from warping, and keeping them perfectly flat until they are removed and put in use.

The disks are provided with the usual central opening for attaching them to the inandrel of the lathe or engine by which they are to be operated, and when the said disks are placed in coincidence with one another in a cylindrical pile, the said openings forma central tubular passage through the 'said pile; and in `order to keep the disks in coincidence with -one another and prevent any of them vfrom pushing out from between the. holdingplates a b the package of disks is provided with a central spindle or wire, f, passed through the central openings of the disks andthrough corresponding openings,` 2, in the plates a b. The said wirej' is bent at one end, as shown, to engage the adjacent plate a, and the other end, which projects through the central passage 'of the package, may be bent down uponl the other plate -to retain the wire in place until the disks are to be used, whenit.

will be bent back into line with the axis of the package to enable the disks to be removed.

When in this condition, as shown in the drawings, the wirewill beretaincd in place or prevented from becoming disengaged from the.v

package by its friction therein, the said wire being substantially as large in diameter as the holes in the disks.

The disks, when held as herein described, form a convenient package for shipment, or to be laid away or stored until Vthe disks are desired for use, when they may be removed from` the package and put in a holding apparatus-such as described in another application led by me May 10, 1883; or, if desired, the disks may be removed one byione from the package and used, the holding-plates Loperating to keep the remainder iiat until all are used up.

I claim- The combination, with a` pile of flexible abrasive disks of the rigid plates a b, engag- In testimony whereof I have signed my naine `ing the ends of the said pile, the springs eon-v to this specification in the presence of two sub- ,neoting the said plates and pressing them soiibing Witnesses.

against the ends of the pile, and the spindle LUTHER D. SHEPARD. 5 f passing through the central opening in the Witnesses: said disks and plates, substantially as dev Jos. P. LIVERMORE,

scribed. W. H. SIGsToN.

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