US1455477A - Stone-cutting wheel - Google Patents

Description

May 15,1923. v 1,455,477 E. A. CHASE v sTom CUTTING WHEEL Filed June 13, 192i 2 Sheets-Sheet 1 May 15, 1923.

1,4554%? E. A. CHASE Patented ay 15, 1923.

urn a nLnoY ALBERT CHASE, OF nonrnrrnnn, vEnMoNr.

STONE-CUTTING WHEEL.

Application filed June 13, 1921.- Serial No. 477,005.

To all whom it may oomem Be it known that 1. Emmy A. CHASE, a

citizen of the United States, residing at Northfield, in the county of Washington and State of Vermont, have invented a new and useful Stone-Cutting Wheel, of which the followin is a specification.

This invention relates to ,a wheel for preparing granite or other similar stone for the polishing operation. This preliminary operation istechnically known as lroning and consists in rotating a metal wheel about a vertical axis above the stone and pressing the revolving wheel strongly against the upper surface of the stone, at the same time foedillg under the wheel a supply of steel shot or other suitable material. This shot rolls about under the wheel and breaks down or crushes the high points on the surface of the stone, thus gradually bringing the stone to a leveled condition suitable for polishing.

My present invention relates to certain improvements in wheels for such purposes, so designed that the wheel will operate more rapidly and willbreak down or crush the surface of the stone more effectively.

With this general object in view, an important feature of my invention consists in the provision of substantially diamond shaped teeth on the under surface of the wheel so disposed that they will ride over the shot and force the same against the stone as the wheel revolves.

Another feature consists in the provision of side strips or plates connecting groups of teeth and forming diamond shaped pockets between the teeth in which the shot will be positioned for engagement by the r0 tati-ng teeth.

l\[y invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Three slightly different forms of my invention are shown in the drawings in which Fig. 1' is a bottom view of a scroll embodying my improvements;

Fig. 2 is a partial sectional elevation taken along the line 22 in Fig. 1;

Fig. 3 is a transverse sectional elevation taken along the line 33 in Fig. 2, and Figs. 4 and 5 are views similar to Fig. 1 but showing slight modifications.

' Referring to Figs. 1 2 and 3, I have shown a wheel comprising a disc 10 having a suitable hub 11 and having a plurality of diamond shaped teeth 12 mounted edgewise on the lower face thereof. As shown in the drawings, each tooth 12'is secured to the disc 10 by a pair of binding screws 13. The teeth 12 are commonly formed of steel and may be hardened if desired. I

In theform shown in Figs. 1 to 3, I iave also connected the teeth in groups or series by curved outer strips or plates 14: which are each preferably secured to cor tain of the teeth by rivets 15. These strips 1 1 are of the same width as the teeth. 12 and co-operate with the teeth to form diamond shaped pockets or recesses 16 between adjacent teeth.

The teeth are shown as spirally arranged in Fig. 1, this arrangement offsetting to some extent the tendency of the steel shot to work outward under the influence of centrifugal force.

Having described one form of my in.- vention, the method of operation and utility thereof will be readily apparent. The diamond. shaped teeth have a marked tendency to ride over the steel shot as the wheel revolves in the direction of the arrow a in Fig. 2. This tendency is considerably increased by the provision of the pockets 16 in which the shot naturally collects in a convenient position for engagement by the next following tooth 12.

While I have described a construction in which the disc 10, the teeth 12 and the plates 14 comprise separate elements it will.

be understood that other convenient arfl rangements maybe used and that the entire structure may be made integral if so desired.

The wheel shown in Fig. 1 is similar to that already described with the exception that the outer strips or plates 14 are used only on the outside series of teeth, commonly' termed leaders, the remaining inner series consisting only of the separated teeth 12.

The wheel shown in Fig. 5 is similar to that shown in Fig. 4: except that all of the teeth except the leaders are arranged in concentric circles instead of in spiral curves.

While specifically described as an ironing wheel, it will be understood that the wheel herein shown is also well adapted for other operations preliminary to stone polishing and particularly for grinding with coarse abrasive.-

Having thus described my invention and the use thereof, it will be evident that other changes and modifications may be made therein by those skilled in the art within the spirit and scope of my invention as set forth in the claims and I do not wish to be otherwise limited to the details herein disclosed but what I claim is v 1. A wheel for dressing stone having, in combination, a rotatable supporting structure and a plurality of work engaging members disposed in an outwardly extended series of curved paths on the lower face of said supporting structure, said members providing a working face for said wheel formed of a succession of relatively short flat stoneengaging surfaces separated by recesses extending upward from the working face toward the supporting structure and having the rearward portion ofthe top of each recess gradually approaching the plane of the working face of the wheel.

2. A wheel for dressing stone having, in combination, a disc and a plurality of teeth fixed to the. under side of said disc in a outwardly extended series of different paths and each having a downwardly and rearwardly inclined leading edge portion and a lower edge substantially parallel to said disc.

3. A wheel for dressing stonehaving, in combination, a disc, a plurality of teeth fixed to the under s1de of said CllSO and each having a downwardly and rearwardly in- M clined leading edge portion, and a metal plate of substantially the same width as said teeth sald' Jlate CODDQCUHO a pluralit of said teeth and being secured against the 5. A wheel for dressing stone having, in comblnatlon, a disc, a plurality of teeth fixed to the under side of said disc in concentric circles and each having a downwardly and-- rearwardly inclined leading edge, additional teeth arranged spirally outside of said concentric teeth, and metal plates each connecting a plurality of the spirally arranged teeth and secured against their outer faces.

In testimony whereof I have hereuntoail'ixed my signature.

ELROY ALBERT onasn

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