US600499A - Hoisting apparatus - Google Patents

Description

2 'Shets-Sheet 1.

(No Model.)

0. H. NOTTER. HOISTING APPARATUS.

No. 600,499. Patented Mar; 8,1898.

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(No Model.) 2 Sheets-Sheet 2.

C. H. NOTTER.

HOISTING APPARATUS.

No 600,499. Patented Mar. 8,1898.

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UNTTED STATES PATENT OFFICE.

CHARLES H. NOTTER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO IVALTER S. BOGLE,,OF SAME PLACE.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 600,499, dated March 8, 1898.

Application filed May 16, 1896. $erial No. 591,760. (No model.)

To all whom it may concern-.-

Be it known that I, CHARLES H. NOTTER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

This invention relates to improvements in a hoisting apparatus, and more particularly to that class of hoisting apparatus in which a bucket is so connected with the hoisting apparatus that the bucket may be lowered in the open position and the sections thereof closed upon the material and the bucket then raised with its load. In a hoisting apparatus of this character there is employed a lifting and holding cable by means of which the bucket and its tackle are suspended and held in position for loading and afterward raised, a main closing-cable operating upon a drum or large sheave, and closing-cables turned over hubs, drums, or sheaves on the headblock and on the frame, whereby the rotation of the drum is caused to effect the closing of the bucket-sections. Heretofore these hoistin g-buckets have usually been pivoted at their upper adjacent edges or corners to a shaft carrying the main winding-drum, said drum havinghubs on which the closing-chains wind, and a head-block having sheaves over which the closing-chains turn. This construction is objectionable for the reason that the drumshaft and the hubs project into the interior space of the bucket and are consequently brought into close contact with and are surrounded by the material which is being hoisted. I obviate this difficulty by mounting the hoisting-drum in the head-block and by providing said drum with hubs upon which the closing-cables wind. I provide the pivotshaft of the bucket-sections with sheaves, over which the closing-cables are drawn. By this construction I remove the winding-drun1 and its hubs from contact with the material to be hoisted, thus increasing the load capacity of, the bucket and obviating the objections heretofore existing in the clogging or coating of the drum and hubs and the cables wound thereon with the material being hoisted. By this arrangement also the weight of the drum, its hubs, and cables is added to that of the head-block, such weight being converted into power in the closing operation.

In the accompanying drawings, Figure 1 is an end elevation showing the bucket in the closed position, the secondary or open position being indicated by dotted lines. Fig. 2 is a side elevation.

In the drawings let A represent the headblock, provided with bearings for the drumshaft B and for the pivot-arms C, by means of which the arms are pivotally connected to said head-block, the outer ends of said arms being pivotally connected to the bucket-sections E E in the usual manner. Said bucketsections are pivoted to the shaft F at their upper adjacent edges, and said shaft F carries the sheaves G G. Upon the drum-shaft is mounted the drum H, having the hubs I I.

Closing-cables J J are made fast at one end,

as jj, to the outer ends of these hubs, and they are also made fast at their inner ends, as by the links z t", to the head-block.

K represents a hoisting and holding cable made fast to the upper end of the head-block,

, and L represents a main closing-cable, which is made fast at one end to the drum.

The operation is as follows: The bucket is lowered with its sections open, as shown by the dotted lines in Fig. 1, and is held in proper place by the cable K. Thereupon the cable L is drawn so as to unwind from the drum, thereby causing the cables J and J to wind upon the hubs I and I, and thereby through the arms forcing the bucket-sections together and taking on the load. In this closing action the weight of the head-block, drum, and hoisting-tackle is transferred through arms to the outer edges of the bucket-sections, and said arms acting as levers the weight of said parts is thereby converted into power. Of course in the closing operation the shaft, to which the bucket-sections are pivoted, and the head-block approach each other as the closing-chains wind upon the hubs; but the drum and the hoisting-cables are maintained out of contact with the material.

My invention may be applied to other hoisting apparatus than the particular one herein illustrated and described, and in its broadest scope is not therefore limited to a use in connection with hoisting-buckets, although it ing from the scope of my invention.

has certain features of advantage peculiar to this type of apparatus. The details of construction may also be varied Without depart- The drum-shaft may be provided with sheaves instead of the hubs, and the auxiliary closingcables may be turned around the pivot-shaft, or the sheaves may be otherwise mounted on they bucket-frame. Of course a single auxiliary closing-cable may be employed.

I claim In a hoisting apparatus, the combination of a head-block, a drum mounted thereon, hubs connected to said drum, a transverse shaft below said head-block, bucket-sections scribed.

CHARLES H. NOTTER. WVitnesses:

O. O. LINTHIOUM, E. L. HUBER.

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