US1525090A - Hoisting hook - Google Patents

Description

Patented Feb. 3, 19,25.

, UNITED STATES ATENT OFFICE.

WILLIAM M. RUTAN, OF ROOSEVELT, NEW YORK, ASSIGNOR TO GILLIS & GEOG-HEGAN, INQ, OF NEW YORK, 1N.v Y A. CORPORATION OF NEW YORK.

I-IOISTING HOOK.

Application filed June 2,

To all whom it may concern:

Be it known that 1, WILLIAM M. RUTAN, a citizen of the United States, residing at Roosevelt, in the county of Nassau and State of New York, have invented a certain new and useful Improvement in Hoisting Hooks, of which the following is a specification.

The invention relates to hooks at the ends of hoisting cables for attachment to loads to be lifted, and more particularly to hooks used in raising ashcans and like loads from a cellar to the sidewalk. Such hoisting mechanism is usually operated electrically and is subjected to severe strains and shocks due to sudden movements in starting and stopping the hoisting and lowering operations.

The object of the invention is to provide simple. and efficie-nt means, conveniently located and arranged, whereby such shocks and jars are absorbed and their transmission to the hoisting mechanism prevented or greatly reduced. Another important object is to dispose such cushioning means in such relation to the hook as to act directly upon the latter and thus relieve the cable.

The invention consists in certain novel features and details of construction and arrangement by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form a part of this specification and show the invention as it has been carried out in practice.

Figure 1 is an elevation of a portion of a crane carrying a cable and improved hook and supporting a can.

The remaining figures are on a larger scale.

Figure 2 is a vertical section taken axially through the weight and cushioning spring, showing the hook with certain other parts in elevation.

Figure 3 is a similar view taken on the line 33 in Figure 1, at a right angle to that figure.

Figure 4 is a top view of the weight with the cable omitted.

Similar reference numerals indicate the same parts in all the figures.

The elevated end of the crane-arm in Figure 1 is marked 5 and carries a pulley 6 over which passes the hoisting cable 7 extending from a hoisting-drum, not shown, operated by any suitable driving mecha 1923. Serial No. 642,982.

nism, which may be understood to be an electric hoist of any approved type, to a weight 9 carrying a hook 8 adapted to engage the bail 10 of a can 11 and hoist or lower the latter. The weight 9 serves its usual function of aiding the descent of the unloaded cable and hook, and also contains the cushioning device.

As shown in the drawings the weight is provided with an opening extending axially therethrough from top to bottom, enlarged at the upper end to form the deep cylindrical cavity 12 into which the shank 13 of the hook extends from below, and contracted at 14 to receive and guide such shank loosely, and thence flared outwardly and downwardly to form a conical recess 15 at the bottom of the weight, in which is received the conical head 16 of the hook from which the shank 13 projects.

The upper end of the shank extends through a collar 17 loosely mounted thereon, and is screwthreaded to receive a nut 18 serving to hold the collar in place. A strong helical spring 19 incloses the shank and abuts at the lower end against the floor of the cavity 12 and at the upper end against the under face of the collar 18. The expansive force of the spring is thus exerted to lift the hook relatively to the weight and hold the head 16 in the recess 15 at the limit of such upward movement. When thus assembled the end of the shank 13 which protrudes beyond the nut 18 is upset or headed as at 20 to hold the nut against accidental disengagement.

The weight is attached to the cable 7 by a bolt 21 extending transversely across the cavity 12 above the nut 18 and through an eye 22 provided at the end of the cable and received in the upper open end of such cavity.

Thus arranged the load carried by the hook is yieldingly supported'by the spring and any shocks caused by sudden strains on the cable in starting or stopping the hoisting or lowering operations are absorbed and the hoisting mechanism correspondingly re lieved. The cushioning thus provided is especially desirable. for electrically operated, rapidly driven, hoisting mechanism in which such movements are very abrupt.

The lower end of the weight 9 is preferably coned or chamfered as at 23 to facilitate the engagement of the hook with a bail,

thus permitting a single operator on the sidewalk to engage a loaded can in the cellar by a fishing" operation and to release the hook from a lowered empty can.

I claim 1. A Weight having therein a cavity open at both ends, a hook having a shank extending into said cavity through one end, a spring in said cavity serving normally to keep said hook in raised position, and means Within the upper end of said cavity and traversing the same for attaching a hoisting cable.

2. A Weight having a cavity in its upper end and a conical recess in its lower end, a hook having a conical head matching such recess and a shank extended into such cavity, a collar on said shank and a nut on the latter to hold said collar,a helical spring inclosing said shank and abutting against said collar and the floor of such cavity, and a bolt extended through said Weight and across such cavity above said shank, and adapted to eX- tend through an eye on a hoisting cable received in such cavity. 7

In testimony that I claim the invention above set "forth, I afiix my signature hereto.

WILLIAM M. RUTAN.

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