US439402A - August s - Google Patents

Description

(No Model.)

- A. S. HELD.

PULLEY.

No. 439,402. Patented Oct. 28, 1890.

attowl e139 avwewtoz 1 ENG cm. warm-maul, w-snmamn n c NITED STATES PATENT OFFICE.

AUGUST S. HELD, OF FREEPORT, ILLINOIS, ASSIGNOR TO THE STOVER MANUFACTURING COMPANY, OF SAME PLACE.

PU LLEY.

SPECIFICATION forming part of Letters Patent No. 439,402, dated October 28, 1890.

Application filed March 7, 1890. Serial No. 342,986. (No model.)

To aZZ whom it may concern.-

Be it known that I, AUGUST S. HELD, aresi dent of Freeport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvementsin Pulleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The object of this invention is to simplify the construction of such pulleys as are usually employed to change the direction of running cords and ropes in cases where the pulley is not made a part of the structure with which it is used. It involves constructions whereby a small number of parts cast without cores automatically engage and form a complete pulley when simply pressed togetherin proper mutual relation.

In the drawings, Figure 1 is a side view of the complete pulley. Fig. 2 is an edge view of the same, looking to the right in Fig. 1, parts being broken away. Fig. 3 shows the suspending-fork detached. Fig. sis atop view of aguard-frame for holding the pulley in place and for preventing the cord from running off the pulley. Figs. 5 and 0 show a modification in construction.

In the drawings, A is a pulley-supporting fork provided with an integrally-formed screw for fastening the pulley to a beam or the like, and I3 is a pulley having integrally-formed gudgeons working in bearings formed by re cessing the edges of the supporting-fork. The pulley is provided with central bosses C, which, with corresponding bosses upon the inner faces of the forks branches, prevent the rim of the pulley from striking said branches. The pulley-gudgeons being short the outer faces of the branches of the fork are left intact, and the depth of the recesses is such that the pulley-gudgeons enter to a distance barely equal to their diameter. Each branch terminates in a hook D projecting outward. Over these hooked ends is slipped a narrow beltlike frame E, whose internal width is equal to the width of the fork and Whose length is slightly greater than the diameter of the pulley. At the middle the internal faces of the frames longer sides are provided with converging grooves F, equal in depth to the thickness of the forks branches and of a width equal to that of the branches.

Now as the frame is forced over the branches the latter are sprung toward each other until the lower edge of the frame passes the hooks, when the recoil of the metal throws the latter outward. The hooks then prevent the frame from slipping off the fork, no matter what force may be applied, until the branches are again sprung together, and the farther advance of the frame is resisted by lugs F above its upper edge. At the same time the side wall of the groove in the frame is tangent to the pulley-gudgeon and completely stops the recess in which the gudgeon lies. It follows that the pulley is acomplete structure ready for use, the parts being firmly united and the ends of the frame serving as a guard to prevent the cord from slipping from the pulley by holding it close at points one hundred and eighty degrees apart, and each about ninety degrees from the fork.

The screw is shown as a common and convenient form for attaching the pulley in many situations; but this forms no part of the invention, and may be replaced by other suitable devices.

Figs. 5 and 6 show the modification of carrying the recesses entirely through the branches of the fork and making the pulley-gudgeons to project beyond these branches. The upper edges of the frame are then notched at right angles to the recesses, so that they may receive the projecting ends of the gudgeons as the frame passes into position, and thus hold them in place. The construction is not otherwise materially chan ed.

It is obvious that the parts may be drilled toreceive the pulley-gudgeons, or that the pulley alone may be drilled or cast with an opening to receive a gudgeon formed separately, while the guard-frame and fork are still made as set forth. I do not, therefore, wish to limit myself to the use of the gudgeon formed integrally with the pulley, although such construction has material advantages.

hat I claim is- 1. The combination, with a pulley, of a suspending-fork passed over the pulley and having each of its branches laterally recessed to receive the pulley-gudgeon, and a belt-like guard-frame passing diametrically about the pulley in a plane substantially perpendicular to the plane of the fork and having its sides grooved to receive the recessed ends of the fork, and thereby retain the gudgeon in the recesses, substantially as set forth.

2. The combination, with a pulley having integral gudgeons, of a supporting-fork having each branch recessed to form a gudgeonbearing and provided with a lateral external projection near its end, and a frame passing diametrically about the pulley and adapted to be sprung over said projections as it is brought into place, whereby the parts are locked together and form a complete mounted pulley.

The combinatioinwith the fork A, pro vided with the external lugs and hooks F D and with the lateral recessed bearings, of the pulley 13, having gudgeons resting in said bearings, and the frame E, passing diametrically about the pulleybetween said lugs and hooks, andhaving its sides grooved to receive the branches of the fork, substantially as and for the purpose set forth.

- In testimony whereof I have signed this specification in the presence of two subscribing witnesses,

AUGUST S. HELD.

Witnesses:

GEORGE L. MUNN, JAMEs I. NEFF.

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