US570909A - Hilen c - Google Patents

Description

(No Model.) f

H. G.'CROWELL.

WOOD PULLEY.

No. 570,909. Patented N/ov. 10, 1896.

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I'IILEN C. OROVELL, OF DUNKIRK, NET YORK.

woon PULLEY,

SPIE]CIFICA'JIION forming part of Letters Patent N0. 570,909, dated November 10, 1896.

Application filed January 6, 1896. Serial No. 574,523. (No model.) l

.To all whom it may concern.'

ings, and to the letters of reference markedl thereon, forming a part of this specification.

This invention relates to wood pulleys; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the accompanying drawings, Figure lis a perspective view of my improved Wood pulley. Fig. 2 shows a section of the pulley-Web and of the hub in the same. Fig. 3 shows a section of the pulley-Web and of the clamping mechanism for securing the sections of the same together.

In constructing the pulley illustrated in the accompanying drawings I preferably make the pulley-Web A of veneering, one thickness thereof being piled upon another, each thickness being at right angles to the one preceding it until the proper thickness is built up, the Whole being cemented together. The rim B is made of layers of veneering laid up in like manner and sawed out into rings, which are cemented to each side of the Web A until the rim is built up to the proper Width. In this manner the grain of the Wood is so crossed in both the web and rim of the pulley that the pulley is substantially homogeneous in all of its parts. In the center of the web A, I make a round opening A', considerably larger in diameter than the shaft upon which the pulley is designed to operate.

The hub E of the pulley I make in four sections E', built up of layers of veneering,which are turned off on their inner surfaces, so as to form projections@ thereomwhich when the four sections E' of the hub are in place the projections e form a circular projection which extends into and fits the openingA in the pulley-Web A, the hub E being centered in the pulley-Web thereby. Through the center of the sectional hub E is bored a shaft-opening E2 of such size that the sections of the hub E on each side of the Web A may be clamped together by means of bolts e', these sections being secured to each side of the pulley-Web by means of bolts a, Which pass through holes in the hub-sections, which are slightly larger than the bolts a, so as to permit of the lateral motion necessary in clamping the hub-sections to a shaft.

In making this pulleyso as to be removable from a xed shaft I bore doWel-pin holes b b transversely through the rim B at substantially the same distance apart as the diameter of the opening A in the pulley-Web A, and I then saw out a section D of the rim and Web on lines passing through the dowel-pin holes b Z9 and extending to the sides of the central opening A in the Web. For securing this section in place I then put doivel-pins b into the holes b, and also put clamps or plates F on the sides of the Web A. These clamps or plates F, I preferably make of Wood, and in each side of the Web A, I bore inclined holes f, and in the clamps or plates similar holes f', oppositely inclined, so that short guides or cylinders f2 of Wood placed in the holes f will project into the holes f in the clamps F, and through the clamps F and cylinders f2 I put clamping-bolts f3, which operate not only to clamp the clamps F firmly to the sides of the Web A, but the action of the inclined cylin` ders f2 in the inclined holes ff' tends to draw the edges of the web A toward the section D, and thus firmly hold the parts in place.

'To counterbalance the 'clamps F on the pulley-web A, I bolt dummy-clamps F' to the sides of the Web opposite the clamps F. It Will readily be seen that by this construction I am enabled to make a pulley with not only interchangeable hubs adapted to t any-sized shaft, but am enabled to make the pulley so that it can be readily placed upon or removed from a fixed shaft, While at the same time the pulley is not seriously weakened by so constructing it. v

Having thus fully described my invention, so as to enable others to construct and use the same,what I claim as new, and desire to secure by Letters Patent of the United States, is

l. In a Wood pulley, the combination, with a Web and a rim provided with a radially-slidn able section permitting the pulley to be placed IOO on a shaft; of plates extending1 across the said I plates7 cylindrical blocks Iitting into said insection, clamping-bolts for securing the said plates to the main portions of the web, and inclined guides engaging with the said plates and web and operating to contract the main portion of the pulley upon the said section when the said clainping-bolts are tightened up, substantially as set forth.

2. In a clamp for securing the sections of a Wood pulley together, plates, there being inclined openings in the pulley-Web and in said clinecl openings, and bolts passing througll. said plates and blocks, substantially as and for the purpose set forth.

In testimony whereof I afiix my signature 1in presence of two Witnesses.

HILEN C. CROWELL. lVtnesses:

A. T. XVILLIAMs, Guo. G. HOLLIsTER.

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