US2415676A - Tool rest for grinding wheels - Google Patents

Description

F. DUCKWITZ 2,415,676

TOOL REST FOR GRINDING WHEELS Feb; 11, 1947.

Filed Jan 1, 1944 INVENTOR. FRED DUCKWITZ. BY ,a/l-wgwsmgk Patented Feb. 11, 1947 TOOL BEST FOR GRINDING WHEELS Fred Duckwitz, Kent, Ohio, assignor to The Black & Decker Electric Company Appiication January 1, 1944, Serial No. 516,642

2 Claims.

This invention relates, as indicated, to tool rests for grinding wheels.

Tool rests of the aforesaid character have heretofore been available in which the tool or other supporting surface is imperforate, so that emery and metal particles resulting from the grinding operations which impinge on such surface are deflected toward the operator and accumulate on the operators person or over a large area in front of the grinding wheel. Such particles,

moreover, may cause injury to the operator, particularly if the particles are still hot.

The present invention has as its primary object the provision of a tool rest which is especially adapted for use in connection with grinding wheels, and in the use of which, the deflection of hot particles in the manner described is, to a large extent, eliminated.

Another object of the invention is to provide a tool rest of the character described which is designed to receive particles resulting from the grinding operations, and so dispose of such particles that they are not injurious to the operator and do not accumulate over a large area in front of the grinding wheel.

A further object of the invention is to provide a tool rest of the character described which is characterized by a work-supporting surface having openings which are sufficient in area and number to receive most of the particles resulting from the grinding operations, and thereby prevent the deflection of such particles from said surface.

A still further object of the invention is to provide a tool rest of the character described, which consists of a minimum number of easily made parts and which is provided with novel means permitting the rest to be quickly attached to the frame or bench of a grinding wheel.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same.

Fig. 1 is a top plan view of a tool rest made in accordance with the invention, and showing the relationship thereof to a conventional grinding wheel;

Fig. 2 is a cross-sectional view, taken on the line 2--2 of Fig. 1, and

Fig. 3 is a side elevation of the tool rest.

Referring more particularly to the drawing, it will be seen that a tool rest constructed in accordance with the invention comprises a casting having an upper portion consisting of spaced side walls I and 2 interconnected by a wall 3 which slopes inwardly as at 4 and 5.

Extending rearwardly and in slightly offset relation to the side wall 2 is a bracket 6, which is preferably formed as an integral part of the tool rest and is slotted as at l for the reception of a screw, bolt or other fastening means whereby the tool rest may be attached to the frame or body of the machine, indicated at F, on which the grinding wheel G is mounted.

Secured to the upper edges of the walls I, 2 and 3 of the tool rest, as by means of stove bolts 8, is a U-shaped plate 9 having a multiplicity of slots or perforations Ill therein, which preferably extend in a series of closely-spaced parallel rows transversely of the periphery of the grinding wheel, the plate 9 being disposed in a horizontal plane which passes substantially through the aXis of the grinding wheel.

It will be noted that the arms of the U-shaped plate 9 are disposed along the sides of the grinding wheel, thereby providing not only additional supporting surfaces for tools to be ground, but

also permitting the portion of the plate 9 which has the slots I0 therein to be brought as closely as possible to the periphery of the grinding wheel.

In the us of the tool rest, the tool or other article to be ground is supported on the plate 9 and against the periphery or sides of the grinding wheel. The emery and metal particles resulting from the grinding operations which fly downwardly as indicated in Fig. 3 of the drawing, will pass through the openings or slots Id and impinge upon the surfaces ll and 5, eventually gravitating to the bench surfac or floor. This prevents the hot particles which would otherwise impinge on the plate 9 from bein deflected upwardly and laterally toward the operator and possibly injuring him, and. also prevents such particles from accumulating on the tool rest or over a, large area, in front of the tool rest.

The openings or slots ID are preferably suflicient in area and number to receive a large portion if not all of the particles resulting from the grinding operations, and, if desired, the arms of the U-shaped plate 9 may also be provided with slots or openings similar incharacter to the openings I0.

departing from the spirit of my invention, or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. A tool rest of the character described comprising a member having spaced side walls and a front wall interconnecting said side walls, a U-shaped perforated plate secured to the upper edges of said walls, one of said side walls hav ing a slotted-extension adapted for mounting said tool rest in proximity to a grinding wheel.

2. In combination, a frame, a grinding wheel and a work supporting rest disposed closely adjacent the periphery of the wheel, said rest comprising a unitary removable unit including a horizontally disposed plate extending across said periphery and to points beyond both sides of the wheel, a flange on the forward edge of the plate and depending therefrom in spaced relation to said periphery and means for mounting the rest on said frame adjacent the wheel, said 4 plate having a plurality of spaced openings therein covering the area opposite the periphery and on. both sides of the wheel through which particles resulting from the grinding operation are thrown, and the flange deflecting said particles downwardly and rearwardly toward the grinding wheel.

FRED DUCKWITZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 762,291 Doolittle June 14, 1904 1,047,571 Sadler Dec. 17, 1912 618,298 Ridley Jan. 24,1899 1,158,127 Geiger Oct. 26, 1915

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