USD32221S - Design for a grinding-disk - Google Patents

Description

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DESIGN.

' Patented Feb. I3. I900.

A. F. DAVIS.

GRINDING DISK.

{Appfication filed Dec. 27.

UNITED STATES PATENT OFFICE.

ALBERT F. DAVIS, OF RUTLAND, VERMONT.

DESIGN FOR A GRINDING-DISK.

SPECIFICATION forming part of Design No. 32,221, dated February 13, 1900.

I Application filed December 27, 1899. Serial No. 741,769. Term of patent 14 years.

To aZZ whom it may concern:

Beitknown that I, ALBERT F. DAVIS, a citizen of the United States, residing at Rutland, in the county of Rutland, State of Vermont, have invented and produced aeertain newand original Design fora Grinding-Disk, of which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure 1 is a plan view of a grinding-disk for mills, showing my design; and Fig. 2 is a. vertical cross-section through the same on the line 2 2 of Fig. 1.

As shown in the drawings, the leading or material feature of my design consists of a series of ribs having a multiple-wedge shape and extending radially from the center of the disk with their apices toward the periphery.

The grinding-disk is provided with a periphery A, of substantially circular outline,

and a central aperture of similar configura- I tion. Extending inward from the periphery A is a series of single-wedge-shaped ribs B. Intermediate of these is another series of multiple-wedge-shaped ribs C, extending inward from the periphery to a greater distance than the ribs B. A further series of ribs D, having multiple-wedge form, extend from the central aperture to the periphery of the disk and are disposed on lines radiating from the center of said disk. The multiple-wedgeshaped ribs referred to are provided with side walls inclining toward each other in the length of the ribs and broken at intervals by lines D at an angle to the inclined walls. All of L the ribs described extend radially from the l center of the disk toward the periphery thereof, and the base of the wedge-shaped figures is disposed toward the center of the disk.

Having described my invention, what I a claim is l The design for a grinding-disk, substantially as herein shown and described.

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

ALBERT F. DAVIS.

f itnesses:

M. J. FRANCISCO, i FRED E. WArKiNs.

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