US1534158A - Wheel for dressing stone - Google Patents

Description

April 21,1925.

E. A.CHASE WHEEL FOR DRESSING STONE Filed Jan. 1'7, 192.5

Patented Apr. 21, 1925.

.ELROY A. CHASE, OF NOR'II-IFIELD, VERMONT.

WHEEL FOR DRESSING STONE.

Application fil ed January 17, 1923. Serial No. 613,263.

r T all 10. mm it may concern:

Be it known that I, ELROY A. Cruise, a citizen of the United States, residing at Northfield, in the county of Vashington and State of Vermont, have invented a new and useful Wheel for Dressing Stone, of whichithe following is a specification.

This invention relates to a wheel for dressing stone, which is particularly adapted for use on granite or other similar material. Such material has a hard crystalline formation and the operation of dressing or rough finishing the stone is to a considerable extent a crushing operation, particularly in the so-called ironing and coarse grinding operations.

It is the general object of my invention to provide an improved construction of wheel particularly adapted for producing a smooth surface on such material as is above described. I p

With this general object in view, I have provided a wheel comprising a rotatable supporting structure and a plurality of work enga ing members disposedin an outwardly extended series of curved paths on the lower face of said supporting structure. These members form a. composite working face for the wheel and are provided. with a plurality of pockets or recesses extending entirely through said members from edge to edge radially of the wheel and distinguished by the fact that the outer portion of the rear wall of each recess is projected forwardly in the direction of rotation of the wheel to retard outward nnivement'of the working material. This forward projection of the rear wall is preferably continued to a point where the edge of the rear wall ortends'beyond and overlaps to agrcater or less extent theinner face of the front wall of the recess. The pockets or recesses also preferably have inclined rear faces having a wedge-like action on the working material.

Several forms of my invention are shown in the drawings, inl'ivhich I Fig. 1 is a partial plan view of a wheel embodying any improvements Fig. '2 is a sectional elevation taken along the line 2-2 in Fig. 1; 7

Figs. 3 and i are an enlarged detail plan view and side elevation respectively of one of the pockets indicated in dotted lines in Fig. 1; and

Figs. 5 to la inclusive are similar views of several modified forms of pockets.

Referring to Figs. 1 to 4, I have indicated a stone dressing wheel of the general type shown in my prior application, Serial No. 563,413, filed May 24, 1922. This Wheel comprises a series of grinding members or rings 20 connected by radial arms 21 over lying the rings, the whole forming a rotatable structure having a driving member 22 that they exert a propeller-like action infeeding the working -material downward through the opening 25 to the surface of the stone. The driving head 26 is engaged by a clutch or other device (not shown) at the lower end of a suitable driving shaft and is rotated thereby.

A band 28 of steel is desirably placed around the circumference of the wheel, as the remaining portion of the wheel isusually formed of cast iron and is of substantial diameter and is also rotated at a relatively rapid speed.

In the preferred construction, the rings 20 and arms 21 are cast as a single element to which is bolted the member 2-2. Vi hcn the grinding rings are worn out the member 22 is removed and is used over again by bolting a new wheel structure thereto.

The construction thus far described substantially as shown in my prior applicm tion and in itself forms no part of my present invention, which relates specifically to certain pockets or recesses 30 formed in the working faces of the rings 20. These pockets extends entirely through the rings. from edge to edge radially of the wheel and may be somewhat varied in outline as indicated in the several figures of the drawings. 7

In the construction shown in Figs. 1 to 4-, the front wall 31 of the pocket is substantially flat and extends outwardly on a forward incline, while the rear wall 32 is concave in its rear portion and is provided at its outer edge with a forwardly extending portion or lip 33 which to some extent overlaps the inner edge of the front wall 31 and substantially retards outward or centrifugal movement of the wheel dressing material. The con ave portion of the rear wall is also downwardly inclined toward the tace of'the wheel so as to produce a wedge-like action upon the working material, forcing it un der the wheel and materially increasing the eliective action thereof.

In Figs. 5 and 6, both the front avallfi l and the rear wall 05 are substantiallyflat and extend outwardly at substantially the same angle, the rear wall being also inclined to produce the wedge-like action above described. V I

In Figs, 7 and 8, the front wall 36 is inclined rearwardly instead of forwardly, while the rear wall 37 is projected forwardly at its outerportion as in the construction previously described.

In Figs. 9 and 10, the construction is similar to l? and .6, except that the front wall 38 is convex and the rear wall 39 is concave, the curves of the two-walls being substantially parallel.

In Figs. 11 and 12, the shape of the pockets 4-0 is quite similar to that shown in Figs. 9 and 10, but these pockets are formed by separate blocks 41 secured by bolts 42 to to a supporting plate L3, the construction 7 in this respect being similar to that shown in my prior application, Serial No. 477,005, liledJune- 13, 1921. v V

The constructionshown in Figs. 13 and 14 is in a 'generalwa-y similar to that shown in Figs. and 4, with the exception that the rear portion 42 of. the rear wall is straight instead of concave and that the working faces are formed of separate blocks e23 bolted toa plate lat asin Figs ll and 12.

The several forms of my invention possess in common the important characteristic that the pockets extend entirely through the rings or working members and that in each case the outer portion of the rear wall is projeeted' forwardly to retard the centrifugal or outward movement of the abrasive or other stone dressing material.

ll' hile I have indicated the rings 20 as being concentrically arranged, it will be understood that my in'iprovements are equally applicable to the common scroll type of stone dressing wheel.

Having thus described several forms of my invention, it will be evident that'other changes and modifications can be made therein by those skilled in the art within the spirit and scope of my inyention as set forth in the claims and I do not wish 'to be otherwise limitedto the details herein disclosed but what I claim is 1. A wheel for dressing stone having, in combination, a rotatable supporting struc tu re and a plurality of work engaging menihers disposed in an outwardly extended series of curved paths on the lower face of said supporting structure,-said members providing a composite working face for said wheel and having a plurality of recesses formed in their work engaging faces, said recesses extending entirely through said a members fro-m edge to edge radially of the wheel, jandhaving the outer portion of the rear wall of each recess projected forwardly in the direction of rotation of the wheelto a pointin advance of the inner portion of the front wall of said recess.

2. A wheel for dressing stone having, in

combination, a rotatable supporting structure and a plurality of work engaging members dis-posed in an outwardly extended series of curved pathson the lower face of said supporting structure, said members providing a composite working face for said wheel and having a plurality of recesses formed in the1r work engaging faces, said said wheel a'nd having a plurality of recesses formed in their work engaging faces, said recesses extending entirely through said members from edge to edge radially of the wheel andthe {front and rear walls of each recess being respectively convex and concave and curving forwardly outwardly to form a partial closure of said recess to retard radial movement of the working material.

4. A wheel for dressing stone having, in combination, a rotatable supporting structure and a plurality of work engagingmcmhers disposed in an outwardly extended series of curved paths on the lower face of said supporting structure, said members providing a composite working face for said, wheel and having a pluralit) otrecesses formed in their work engaging faces, said recesses extending entirely through a said members from edge toed'ge radially of the wheel, and having the outer portion of the rear wall of each recess projected forwardly in the direction of rotation of the wheel to retard outward movement of the working material, the rear wall of said recess being also rearwardly and downwardly inclined to produce a wedge-like action upon the working material. i

In testimony whereof I have. hereunto at fixed my-signaturfe.

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