US1150604A - Hoisting apparatus. - Google Patents

Description

J. A. KEARNEY.

HOISTING APPARATUS.

APPLICATION FILED JAN. 22. 1915.

1,159,694. Patented Aug. 17,1915.

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HQISTiNGr APPARATUS.

Specification of Letters Patent.

Patented Aug. it, 1915.

Application filed J anua1'y.22, 1?l 5. Serial No. 3,667.

To all whom it may concern.

Be i known t a 1, J HN K EY citiaen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented a certain new 11116.1 use l mprov me t in Hoi i APP? ratus, of which the following is a specification.

Th in en i elate o h ng -i chinery inwhich a tubularstandard carryingthe hoisting head is received telescopically in a hollow post, and is based on the apparatus shown and described in Letters Patent to 11. 6, d t d June 3, 1 N 1,1Q1,190, and the object of the invention is to p d imp nexp n v means for raising and lowering the standard in the post, and for lessening the danger of acci dent in operating this s appa a u The invention consists in certain novel features 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 l is a side elevation of the appa ratus in the extended condition for service in hoisting a load. The remaining figures are on a larger scale. Fig. 2 is a side view of the elevating mechanism. Fig. 3 is a corresponding front elevation. Fig. 4: is a vertical section of the same, partly in elevation. Fig. 5 is a corresponding plan view, partly in horizontal section. Figs. 6, 7 and 8 are side views of portions of the elevating mechanism, partly in vertical section, showing several positions of such portions relatively to each other.

Similar letters of reference indicate the same parts in. all the figures.

A is a hollow post shown as firmly set and supported in a cellar hoist-way below the street level, and B is a tubular standard inclosed telescopically in the post and arranged to be raised and lowered relatively thereto and correspondingly elevate the hoisting mechanism, mounted on the upper end of the standard, above the street level for service in hoisting a load, or to lower the hoisting mechanism into the hoist-way below when not in use.

On the post A is a clamp or two-part p r i o the hQi fiyolge D D secured in place by the transverse loolts D carrying a shaft C in the lower portion, on one overhung end of which is a pinion C in mesh with a gear-wheel C on a similar shaft C above. The latter carrles a spur-wheel F keyed thereon between the cheeks D, D of the clamp and is rotated by a crank C applied upon the squared end C7? of the pinion-shaft C. The post A is slotted vertically as at a to permit the spurs F? of the spur-wheel F to extend therethrough and engage the series of holes 6 in the tubular standard, serving with the spur,- wheel as a rack by which the tubular standard may be raised or lowered relatively to the post. The spurs F are preferably cylindrical with hemispherical ends, and the holes Z) are circular, of slightly larger diameter than the spurs, and are so located in vertical series as to permit the spurs to engage deeply therein and serve to hold the tubular standard-against rotary movement in the post without requiring other guiding mea s- It will be noted by referring to Figs. 4, 6, 7 and 8, that'in all positions of the spurwheel one or more spurs are always reliably engaged in one or more holes 6 7), in Fig. i

one tooth or spur extends into the standard at a right angle and is fully engaged; in Fig. 6 one spur is in strong engagement while the succeeding spur is partially engaged; in Fig. 7 two spurs are well engaged, and in Fig. 8 one spur is in strong engagement while the preceding spur is still partiallyengaged. By this means the standard may be raised or lowered reliably and the weight and expense of the usual rack and pinion greatly reduced.

The hoisting mechanism at the upper end of the standard may be of any approved type, it is shown as a head K having laterally projecting parallel arms in which is mounted a shaft H carrying a gear-wheel H in mesh with a pinion G on a shaft G; the latter is equipped with a pawl G and a suitable brake operated by the lever N, and is squared at one end to receive a crank L by which the pinion is turned and the drum H rotated to wind the rope or cable P in raising the load M as will be understood. The head K is rotatably mounted in the upper end of the standard to permit the load to be swung and deposited upon the sidewalk, the standard being held against such rotation by the engagement of the spurs]? with the holes 6. V

In the patent above referred tothe construction requires the standard to be slotted for. a considerable portion of its length, thus weakening it and increasing the liability to distortion; the introduction. and securing of a rack within the standard adds to the weight and to the cost of manufacture, and, as the interior surface of the commercial pipe used for the standard is frequently irregular, a further disadvantage is encoun-i tered in the difliculty of insuring perfect alinement of the rack. All these disadvantages are avoided by the employment of the spur-wheel in mesh with the series of perforations 1n the standard, and such construction is economical, strong, durable, and V ment of the standard, and in order to prevent disengagement of the pawl by grasping'its lower end and thus endangering the hand of the operator, a shield D in the form of a laterally projecting flange on the Copies of this patent may be obtained for the lower end of the standard when the latter is fully elevated and support it reliably during the hoisting operation.

I claim Inan apparatus of the character set forth,

a hollow post, a tubular standard having a series of holes in alinement and arranged to slide within the post, the post having a vertical slot in alinement with the holes of the standard, a dampen the post. comprising a two-part yoke, a spur wheel and shaft therefor carried by said yoke, a gear wheel on saidishaft, a pinion meshing with the gear wheel, a transverse bolt in said yoke, a pawl on said bolt, toengage between the spurs of the spur wheel,- a lever at the upper end of said pawl, and a laterally-projecting flange on the clamp extended over the pawl and spur wheel and within'the confines of the gear wheel to form a shield, the end of said lever projecting beyond the shield and movable in a space between the shield and post In testimonythat I claim-the invention above set forth 1 aflix my signature, in presence of two witnesses.- 4 a V J OHN] A. KEARNEY. Witnesses: 1 1

CHARLES R. Shanna, LILLIAN H. WILSHUSEN.

five cents each, by addressingrthe Commissioner of Patents, Washington, D. O.

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