US388942A - Setts - Google Patents

Description

(No Model.)

S. A. WOODS & J. B. THOMAS.

LOO$E PULLEY. No. 388,942. Patented Sept. 4, 1888.

INVENTOR,

ATTORNEY,

lhvrrnn STAT-ES n'rnsrr Orricn.

SOLOMON A. W'OODS AND JOHN R. THOMAS, OF BOSTON, MASSACHUSETTS, ASSIGNORS TO THE S. A. \VOODS MAOHTNE COMPANY, OF MASSACHU- SETTS.

LOOSE PULLEY.

SPECIFICATION forming; part of Letters Patent No. 388.9%2, dated ieptember 1888.

Application tiled March 21, 1888. Serial No. 268,037.

To rtZZ 1117mm 72mg concern;

Be it known that we, SOLOMON A. Woons and J our: 11. THOMAS, both of Boston, in the county of Suffolk and State of Massachusetts,

have invented a certain new and useful Improvement in Loose Pulleys, of which the following is a specification.

Our invention relates to loose pulleys for shading; and it consists in certain new and in useful constructions and combinations of the several parts thereof, substantially as herein after described and claimed.

In the drawings, Figure l is a face view of a loose pulley constructed according to our ini5 vention. Fig. 2 is a transverse section through the axis of the same.

A is the rim of the pulley,on which the belt runs. From the inner side of this rim aweb, 13, projects inward toward the axis, and upon the inner edge of this rim is cast the reservoir 0 around the axis, and having a tubular axial hole through its center to receive the shaft on which it is to run. The web 13 is a mere central extension inward of the rim A, which 2 is employed to enlarge the diameter of the pulley without enlarging the reservoir 0, and in small pulleys the rim will be cast directly on the outer periphery of the reservoir. This reservoir 0 has a central radial flange, 0, ex-

tending inward from opposite to flange B toward the center of the pulley. In flange a, near its exterior edge, holes 0 c are made through it. The walls of reservoir 0 terminate on each side in tubular sleeves c c concentric 5 with the rim A, which support the pulley upon its shaft. Into these sleeves from each end are driven the tubular metalbushings (Z d, and each of these bushings has upon its inner side a groove leading from its inner end to a 0 hole extending diagonally through the wall of the bushing and wall of reservoir 6 into the latter, and through this groove and hole the winking w is drawn, so that its ends project from the groove and hole into reservoir 0, as

5 shown.

It will be observed that the flange 0 projects radially inward from the periphery of the oilreservoir 0 toward the exposed part of the shaft S within the reservoir, upon which shaft (No model.)

the pulley revolves. This construction is cs sential in order to enable the film of oil which flows along the faces of the flange c to reach the surface of the shaft, and flow longitudinally along the same between it and the bushings (Z, which support the pulley at the ends of the reservoir upon the shaft. The reservoir C is made with its end walls concave and inclined toward each other and radially outward from where its bushings bear upon the shaft S, in order that the centrifugal action of the rotating pulley upon the oil may tend to keep it within the reservoir and from escaping between bushings (Z (Z and shaft S; and if it were not for flange c, which conveys the film of oil radially inward from this part of 6 the reservoir, so that it may reach the shaft again, the oil would by this form of the reservoir be kept substantially entirely away from the shaft-bearings. The inwardly-projecting flange c is shown as touching the shaft S at the central part of the flange, and while this construction is preferred it may be made to not quite touch the same with good results. The oil-reservoi r O is constructed of annular form to allow the oil to flow freely around its outer periphery, unchecked by any transverse partitions extending in a direction parallel to the shaft. This construction allows of the great body of the oil being held in the outer part of the reservoir and prevented from cscaping until it is gradually taken up and supplied to the shaft S, as before described, by the flange 0.

Inside of the bushings d, the tubular shaft S is introduced. This tubular shaft is attached firmly to the countershaft by set-screws n n, which pass through collars in m of it, one of the collars, m, being removable and held in place by the set-screw, which holds it in place, as well as aids in securing the tubular shaft to 0 the counter-shaft. The shaftS thus becomes a part of the counter-shaft on which the pulley runs, and with relation tothe pulley-bearings and reservoir it co-operatcs the same as if it were a solid shaft. A thumb screw, c, is tapped through the wall of reservoir O and serves to stop the hole through which oil is supplied to the latter.

By the form of construction of the pulley described we are enabled to cast it with the rim A, flange B, reservoir G, and sleeves 0 0 all in one piece, thus leaving no seam or joint for the escape of oil through the outer shell of the reservoir.

When the counter-shaft is inserted through tubular shaft S, and the latter secured to it by the set-screws and oil is supplied to the reservoir O, the oil will be thrown outward by centrifugal force as the pulley revolves upon its tubular shaft; but a slight film of oil will cling to the faces of flange cand drip upon the shaft S and work into the bushings d d, lubrieating the bearings upon which the pulley runs. Any excess of this oil will be arrested and conveyed back into the reservoir 0 by the wicking 20, which wipes up the excess of oil, so that it cannot escape from the outer ends of the bushings d d. The flange c operates best when it almost or quite touches shaft S, as shown, and every time the pulley is stopped it causes the oil adhering to its surface above shaft S to drop upon the latter.

It is evident that the bushings d (I might be omitted and the sleeves c c be made to bear directly upon shaft S; or the latter might be made solid or in one piece with the countershaft. We prefer to employ the bushings, however, as the axial holes through sleeves 0 can thus be made larger and a better opportunity afforded to ciean the casting sand out of the reservoir 0, and the bushings can be made of Babbitt, while the pulley is of iron.

By using the tubular shaft S, the same-sized bore of the pulley can be employed with different diameters of counter shafts, thebore of .the tubular shaft being varied to suit the counter shaft.

\Vhat we claim as new and of ourinvention 1. The combination of a loose pulley having the rim A, the annular reservoir 0 within the same, the tubular bearings d d, placed in the ends of the reservoir with a space between them, and the annular flange 0, projecting radially inward from the outer part of said reservoir toward the shaft opposite said space, with the shaft S passing through said bearings and flange, whereby a portion of the surface thereof within the pulley-reservoir between said bearings is exposed to receive oil conveyed thereto by said flange, substantially as described.

2. The combination of a loose pulley having the rim A, the annular reservoir 0 within the same, the tubular bearings d (I, placed in the ends of the reservoir with a space between them, and the annular flange 0, provided with hole 0 through the same and projecting radially inward from the outer part of said reservoir toward the shaft opposite said space, with the shaft S passing through said bearings and flange, whereby a portion of the surface thereof within the pulley-reservoir between said bearings is exposed to receive oil conveyed thereto by said flange, and the oil may pass through hole a during the operation, substantially as described.

3. The combination of a loose pnlleyhaving the rim A, the annular reservoir O,surrounded thereby, the tubular bearings d d, placed in the ends of the reservoir with aspace between them and provided with internal grooves and holes supplied with wiclsing w, and the annular flange 0, projecting radially inward from the outer part of said reservoir toward the shaft opposite said space, with the shaft S passing through said bearings in contact with said wicking and through said flange c,whereby a portion of the surface thereof within the pulley-reservoir between said bearings is exposed to receive oil conveyed thereto by said flange, and the excess of said oil passing within said bearings is wiped off from the shaft and prevented from escaping, substantially as described.

4. A loose pulley having the rim A, flange B, annular reservoir 0 within said rim and flange, radial internal dividing-flange einsaid reservoir, andsleeves c all cast in one piece without seam or joint in the reservoir, and having its .shaftbearings formed by the separate bushings d d, secured in said sleeves e 0 upon each end, substantially as described.

5. The combination of a loose pulleyhaving the rim A, the annular reservoir O, surrounding its shaft within the rim, and formed of greater internal diameter at its central portion than that adjacent to its end hearings on the shaft,theindependenttubularshaft-bearings at each end of the reservoir witlran open space within the latter between them, the annular flange c, projecting radially inward from the outermostpart of said reservoirtoward theshaft opposite to said space, with the shaft S passing through said bearings and flange, whereby a portion of the surface thereof within the pul' Icy-reservoir between said bearings is exposed to receive oil conveyed thereto by said flange, and the oil is carried to the central and outermost part of the reservoir against said flange and away from the shaftbearings by the rotation of the pulley, substantially as described.

6. A loose pulley having the rim A, annu lar reservoir 0, surrounding its shaft, radial flange c, dividing said reservoir, and tubular bearings d d, in combination with the tubular shaft S, provided with fixed collar m and detachable collar m and the set-screw passing through the latter and the shaft and adapted to hold the collar m upon the tubular shaft and secure the latter to the counter-shaft, substantially as described.

SOLOMON A. WOODS. JOHN R. THOMAS.

\Vitnesses:

DA ID HALL RICE, N. P. Ocxrnerron.

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