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Publication numberUS630868 A
Publication typeGrant
Publication dateAug 15, 1899
Filing dateJun 28, 1899
Priority dateJun 28, 1899
Publication numberUS 630868 A, US 630868A, US-A-630868, US630868 A, US630868A
InventorsJacob A Dorman
Original AssigneeMoore James T, Jacob A Dorman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Split pulley.
US 630868 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented Aug. I5, |899.




(Application filed June 89 UNITED STATES PATENT OFFICE.



SPECIFICATION forming part of Letters Patent No. 630,868, datedv August 15, 1899.

Application filed .Tune 28,1899. Serial No. 722,151. (No model.)

To @ZZ whom it 11m/y er1/werft:

Be it known that I, JACOB A. DORMAN, a citizen of the United States, residing at foolley, in the county of Skagit and State of Vashington, have invented a new and useful Split Pulley, of which the following is a specification.

This invention relates to split pulleys, and has for its object to provide improved means for connecting the same to shafts and also to accommodate a single pulley to shafts of different diameters.

A further object is to provide a strong and durable device which is not liable to become broken when being tightened upon the shaft and also which will not Wear grooves in the shaft, but will remain fixed in its original applied position.

To these ends the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully de scribed,sho\vn in the accompanying drawings, and particularly pointed out in the appended claim, it being understood that changes in the form, proportion, size, and the minor details of construction maybe made within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the present invention.

In the drawings, Figure 1 is a longitudinal sectional view of the improved split pulley. Fig. 2 is a transverse sectional View taken 011 the line x of Fig. 1. Eig. 3 is a detail perspective view of one of the elamping-yokes. Fig. iis a detail perspective view of one of the detachable teeth.

Corresponding parts in the several figures of the drawings are designated by like characters of reference. Y

Referring to the accompanying drawings, l and 2 designate, respectively, the half-sec tions of a split pulley, each of which is provided with a pulley-arm 3 and i, respectively. The p ulley-sections maybe of the built-'up variety, asshown, or solid, as desired, and the contiguous faces of the arms are provided with transverse complementary segmental grooves 5, adapted to :Form a central shaftopening to receive theshaft 6, as shown. This much of the pulley may be constructed in any of the common or usual Ways.

In carrying out the present invention the segmental shaft-grooves of each arm are pro vided with a transverse groove 7, and at one side thereof there is provided a pair of opena ings 8,which extend entirelythrough the arm and are located at opposite sides of the shaftgroove. n

Fitted into the transverse grooves 7 are the yoke-shaped clamps 9,Which have their opposite side arms 10 extending through the respective openings S in the arm of the opposite pulley-section. As best shown in Fig. 3, it will be seen that the clamping-yoke is provided With a pair of teeth 11, which are located upon one face of the bowed portion of the clamp and intermediate of the opposite side arms thereof. Each clamp member is formed of Wrought-iron, so as to be of maximum strengtlnand the teeth are tempered, so as to provide the sharp edges thereof,which are adapted to bite into the shaft 6.

To preserve the required strength of the clamping members, the teeth are made removable, so that they may be tempered inde* pendently of the saidV members. The inner bowed face of each clamp member is provided with a pair of longitudinally-tapered and dovetailed groovesl?, which extend entirely across the width of the members. The teeth are also Wedge-shaped longitudinally and are provided with outwardly-beveled longitudinal edgesV 13, whereby saidteeth are adapted to be driven into the tapered grooves and thereby held firmly therein. As clearly shown in Fig. 3, itavill be seen that the outer faces of the teeth round evenly and gradually into the curved inner face of the clamp member., and one end only projects outwardly from the inner face of the clamp member, ,so as to form the sharp biting edge 14, which extends transversely aeross the member. It will further be noted that the vshoulders formed by the biting edges 14 are located in the same relative direction in each clamp member, but are disposed in opposite relation in the respective members.

By reference to Fig. l it will be seen that each clamp member embraces the shaft 6 and the opposite arms 10 project through the respective openings 8 and beyond'the outer side of the respective arms 3 and et. Fitted to the outer face of each pulley is a metallic wear-plate 15, having suitable openings re` IOO eeiving the projecting threaded ends 1G of Athe Clamping members, and the latter are pro-- bers fixed thereto, thereby preventing movement of the members and the wearing of grooves in the periphery of the shaft. Should any of the teeth become broken or Worn, they may be readily removed and a new tooth substituted therefor.

That I claim is- The combination in a split pulley having opposite half-sections and pulley-arms therefor, of oppositely-disposed substantially U- shaped elamping members, which embrace the shaft and extend through the respective pulley-arms and provided with tapel'ecl'dove-A tailed grooves located in the inner face -oC the bowed portions thereof, and tapered teeth having longitudinally-beveled edges and-re#4 movably fitted in the grooves of the respec-` tive clamping members, and fastening means for the clamping members, substantially as and for the purpose set forth.

In testimony that I claim the foregoing asv Y V my own I have hereto-affixed my signature in the presence of two Witnesses.

JACOB A. DORMAN. Vitnesses:


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US20150219102 *Jul 22, 2013Aug 6, 2015Oerlikon Leybold Vacum GmbhVacuum pump
US20150276038 *Oct 2, 2013Oct 1, 2015Borgwarner Inc.Fluted sprocket/cog bore for reduced machining cycle times and reduced tool wear
Cooperative ClassificationY10S474/903, F16H55/46