US903960A - Self-oiling loose pulley. - Google Patents

Description

H. A'. DAVIS.

SELF OILING LOOSE PULLEY.

APPLICATION rIL'nn mm a, 1907.

Patented Nov. 17, 1908.

HENRY A. DAVIS, OF DAVENPORT, IOWA.

SELF-OILIN G LOOSE PULLEY.

Specification of Letters Patent.

Patented Nov. 1'7, 1908.

Application filed June 8, 1907. Serial No. 378,017.

To all whom it may concern:

Be it known that I, HENRY A. DAVIS, a i citizen of the United States of America, residing at Davenport, in the county of Scott i and State of Iowa, have invented new and useful Improvements in Self-Oiling Loose j Pulleys, of which the following is the specification.

My invention relates to improvements in loose pulleys in which a rim is secured to inwardly projecting hubs revolubly mounted upon a shaft; and the objects of my invention are, first, to provide simple and effective means for oiling such pulleys; second, to provide means for automatically returning the oil to the shaft after it has been carried away by centrifugal force; third, to provide simple and effective means to prevent the wear of a shaft upon which a loose pulley is mounted. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure I is a side elevation of the pulley showing inwardly projecting hub and the oiling block in dotted lines; Fig. II is a front elevation of one hub and of a portion of the shaft but shows the other hub and its attached side plate, and the rim and oiling block, in section on the line XX of Fig. I; Fig. III is a side elevation showing in clotted lines the hub with the oilmg block altered to form a ring; Fig. IV is a vertical cross section on the line XX of Fig. III, but shows one hub in full lines instead of in section.

Similar letters refer to similar parts throughout the several views.

The rim A, is composed of hard pressed fiber or other suitable material and must be made impervious to oil either by the composition of the material used or by lining the inside of the rim with some substance impervious to oil.

channels F, leading from the annular chan nels K, to connect with the oil chamber J, within the pulley. The oil block D, is revolubly mounted eccentrically upon the shaft C, intermediate the hubs B, and has its lower end weighted to keep it in position and its upper end extended so as to almost touch the inner side of the rim A. Channels E, are formed in the extended end of the oil block D, to conduct the oil to the channels G, in the hubs.

Referring to Figs. III and IV the exnded end may be taken from the oil block D shown in Figs. I and II, and the interior of the oil block bored out to form a ring which will rest upon the interior of the rim A, and carry the oil from the rim to the axle, from which it will travel through the channels G, and F, and back to the ring D, along the inner face of the rim A.

The principle of my invention is the use of centrifugal force to carry the oil away from the shaft and into contact with the oil block and the use of the oil block to conduct the oil back to the channels G and G, in the hubs.

It is a well known fact that great difficulty 1s experienced in preventing loose pulleys from cutting out the axles upon which they revolve and the use of my invention secures perfect oiling of such axles and thereby lengthens the life of such axles and the loose pulleys mounted thereon.

I have described two forms of oil block but it is obvious that various equivalent means for conducting the oil from the rim back to the shaft may be used without departing from the principle of my invention.

It is designed to use a comparatively large quantity of oil in this pulley so that there will be a continuous circulation of oil through the various ducts or channels; and when desired, the inner face of the rim may be sloped from each side toward the middle so that the centrifugal force will cause the oil to collect at the middle of the rim. The oil necessary to operate this pulley may be put in when the pulley is mounted upon the axle and put together, or a suitable opening, as at P, may be provided for the admission of oil, with a suitable stopper, Q, to close the opening.

In operation, the weighted end of the oil block D, keeps it practically stationary and when the ring D, is used, it ,rotates from contact with the rim. Perforations as shown at 0, may be provided in the ring to facilitate the passage of the oil to the shaft C.

\Vhat I claim and desire to secure by Letters Patent, is

1. A loose pulley comprising a rim, and side plates and inwardly projecting hubs, formed integral with the side plates and spaced apart, having a plurality of longi tudinal channels located in their inner surfaces parallel with axle openings in the hubs and in line with the axle, oblique radial channels extending from the inner ends of the longitudinal channels to the peripheries of the hubs, and annular channels in the inner surfaces of the hubs at the juncture of the longitudinal and oblique radial channels, and an eccentric oiling block loosely positioned between the inner ends of the hubs.

2. A loose pulley comprising a rim, and

side plates, and inwardly projecting hubs, forined integral with the side plates and spaced apart, having a plurality of longitudinal channels located in their inner surfaces parallel with axle openings in the hubs and in line with the axle, oblique radial channels extending from the inner ends 0 the longitudinal channels to the peripheries of the hubs, and annular channels in the inner surfaces of the hubs at the juncture of the longitudinal and oblique radial channels, and an eccentric oiling block in the form of a ring loosely positioned between the inner ends of the hubs and resting thereon and adapted to contact with the inner face of the rim.

HENRY A. DAVIS.

\Vitnesses WVINNIFRED J earns, CLARA lVILI-IELM.

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