US885060A - Ratchet-cylinder pulley. - Google Patents

Description

No. 885,060. PATENTED APR. 21. 1908.

A. LEATHERMAN. lRATCHBT .CYLINDER PULLB-Y.

APPLIUTIN FILED APB. `13, 1907.

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[NVE/WOR 010.005,000. i PATENTBD APR. 21, 100s.

' l A. LEATHBRMAN- RATGHBT CYLINDER PULLBY.

'APPLICATION FILED APR. 13.1907.

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ALFRED LEATHERMAN, OF BUTTE, NEBRASKA.

RA'icHET-CYLINISER PULLEY.

Specification of Letters Patent.

Patented April 21, 1908.

Application filed April 13, 1907. Serial No. 367,984.

To all 'whom it may concern:

Be it known that I, ALFRED LEATHERMAN, a citizen of the United States, residing at Butte, in the county of Boyd and State of Nebraska, have invented certain new and useful Improvements in Ratchet-Cylinder 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 appertains to make and use the same.

My invention relates to new and useful imtion and in an inverse direction from the movement of the pulley.

A stil] further object is to provide means for assemblingvthe several parts of the pulley together.

Other objects and advantages will be hereinafter referred to and more particularly pointed out in the claims.

In the accompanyin drawin s which are made a part of this app ication, igure 1 is a side elevation of my improved form of pulley. Fig. 2 is an end elevation thereof. Fig. 3 is a sectional view as seen on line 3 3, Fig. 1. Fig. 4 is a sectional view as seen on line 4-4, Fig. 1. as seen on line 5 5, Fig. 1. Figs. 6 and 7 are detail elevations of the two central sections of the pulley. Fig. 8 is a side elevation,

of the ratchet employed in connection with my improved pulley, and, Fig. 9 is an end elevation thereof.-

Referring to the drawings in which simi-V Fig. 5 is a sectional view the collars 1 and 2 are tubular boxings 6 and 7 respectively on the outer peripheries of which are a plurality of ribs 8, which are adapted to enter grooves 9 in auxiliary col'- lars 10, a portion of said collars being preferably constructed of wood, or other. preferred fibrous material, to provide a grip ing surface for the pulley, so that the usua form of lag ing required in connection with metallic pulleys may be entirely dispensed with.

After a suflicient number of the auxiliary collars have been 4laced upon the boxings 6 and 7 to com letefy cover the boxings, I dispose a plura it of bolts 11 lon itudinally through the co lars 1 and 2, anc auxiliary collars 10, the two-end auxiliary collars being preferably formed of metal and provided with recesses 12, so that the heads 13 at one end of the bolts and the nuts 14 at the opposite end thereof will not protrude from the ends of the pulley.

\ When the device is employed as a ratchet pulley, I extend through the bore in the box'- ings 6 and 7, a tubular shaft 15, the central portion of which is provided with a ratchet wheel 16, which extends between the meeting faces of the collars 1 and 2, and the flanges on the collars l and 2 form a housing for the ratchet wheel.

Pivotally mounted upon the bolts 11 and between the meeting faces of the collars 1 and 2 and around the ratchet wheel 16 are a plurality of awls, 17, the inner surfaces of the flanges aving depending shoulders 13 thereon, against which the pivoted ends of the pawls rest, thereby relieving the bolts 11 from. an undue amount of strain when the pulley is driving a shaft.l

The free ends of the pawls 17 are held into engagement with the ratchet on the wheel 16, by disposing tension springs 20 between the free ends of the pawls and the surrounding portions of the flanges, and in this instance a bore 21 is provided in each of the 'lugs 3, in which the outer ends of the springs 20 are seated, While the opposite ends of the springs are held into engagement with the pawls by means of studs 22.

In order to introduce oil into the pulley, so that the wearing parts thereof will be well lubricated, the bore in one of the lugs 3 is enlarged to receive a plug 23, the upper end of which is tapered, and adapted to enter a tapered oil hole 24 in one of the lugs 3, and as one of the tension springs 20 en ages the o posite end of the plug, the ho e 24 will e normally closed, thereby excluding dust, grit and the like from entering the cavity into which the oil passes.

When introducing the oil through the hole 24, the tapered spout of the oil can is inserted in to the hole, and the plug depressed, when by operating the oil can in the usual manner,

against action of the spring 20. In applying the pulley to use, the tubular shaft l5 is directed over the usual form of shaft and fixed thereto in the usual, or any preferred manner, preferably by keying, and it will be seen that through the medium of the ratchet wheel and pawls in the pulley, the shaft will be positively driven in one direction, but may be freely turned in the pulley when the pulley is standing still.

It will thus be seen that I have provided a very cheap, durable and economical form of device, and one wherein the parts thereof may be readily and quickly assembled and secured together, and it will further be seen that I have provided a very convenient form of ratchet pulley and by providing the major portion of the wearing surface of the pulley of fibrous material, a gripping surface is provided for the belt and thus dispensing with the usual form of lagging used for this purose.

What I claim is l. The herein described pulley comprising 'a tubular body formed of a pair of tubular sections, said sections having flanges on their meeting faces, one of said flanges having notches therein adapted to receive lugs on the opposite flange, said flanges forming a cavity between said sections, a plurality of bolts extending through said sections and the cavity, a tubular shaft extending through said body, said shaft having a ratchet wheel thereon adapted to extend into said cavity, a plurality of pawls pivotally mounted on said bolts and in said cavity, the inner surfaces of the flanges having depending shoulders thereon against which the pivoted ends of the pawls are ada ted to rest and springs be'- tween the free en s of said pawls and the surrounding wall of the cavity, whereby said pawls will be held into engagement with the teeth on the ratchet whee 2. In a pulley the combination with a tubular body formed in two sections and having cavity forming flanges at the meeting faces said flanges having depending shoulders on their inner surface; of a tubular shaft seated in said tubular body, said shaft having a ratchet wheel thereon extending into said cavity, bolts extending longitudinally of said body a plurality of pawls pivotally mounted on said bolts the pivoted ends of which are adapted to rest against said flanges and springs between the free ends of said pawls and the surrounding wall of the cavity, said spring 5 engaging studs on said pawls and seated in bores in said body, whereby said ratchet wheel and parts secured thereto will be driven in one direction.

3. A pulley of the class described comprising a tubular body, said body having an annular cavity central of its inner surface, one wall of said cavity having alternately arranged bores and depending shoulders thereon, a plurality of bolts extending longitudinally through said body and the cavity, a plurality of pawls pivotally mounted in said cavity by means of said bolts, said pawls having studs thereon, springs between the pawls and the surrounding wall of the cavity, said springs being seated' in said bores and engaging said studs on the pawls and a tubular shaft for said body, said shaft having a ratchet wheel thereon, said ratchet wheel being disposed in said cavity and adapted to be enga ed by said pawls whereby said ratchet whee and p arts secured thereto will be driven in one direction.

v In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALFRED LEA'IIIERMAN.

Witnesses i WILL D. FORBES, ELI ROBERTS.

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