US423564A - Elevator - Google Patents

Description

(No Model.)

KENNEY.

ELEVATOR.

Patented Mar. 18, 1890.

UNITED STATES PATENT OFFICE.

MICHAEL T. KENNEY, OF BROOKLYN, NE\V YORK.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 423,564, dated March 18, 1890.

Application filed October 16, 1889. Serial No. 327,200. (No model.)

To aZZ whom it may concern:

Be it known that 1, MICHAEL T. KENNEY, of Brooklyn, county of Kings, and State of New York, have invented certainnew and useful Improvements in Double-Lift Hand- Hoists, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to hand hoisting machines, usually called hand-hoists, and especially to that variety wherein provision is made for elevating or lowering a load or weight in whichever direction the drum may be revolved, this variety being known as double-lift hoists to distinguish it from another variety in which the drum must be revolved in one direction to raise the load and in the opposite direction to lowerit, and known as single-lift hoists.

The object of my invention is to provide a simple, cheap, compact, and easily applicable driving mechanism for the chain-drum, by which power may be transmitted from the hand-rope wheel to the said drum acting in either direction with equal force and with little loss by friction, and by which the speed of the drum may be increased over the speed in the ordinary forms of hoists'without interfering with its safety, its strength, or with its adaptability for use in a variety of situations or with the desirable accessibility of all its working parts. To accomplish all of this and to secure other and further advantages in the matters of construction, operation, and use,

my improvements involve certain new and useful arrangements or combinations of parts and peculiarities of construction, as will be herein first fully described, and then pointed out in the claims.

In the accompanying drawings, forming part of this specification, I have shown at Figure 1 a vertical View, partly in section and partly in elevation, of a double-lift handhoist mounted ready for use and having my improvements applied thereto. Fig. 2 is an end view from the side of the hand-rope wheel, showing the relative location and arrangement of the shaft carrying the hand-rope wheel and the counter-shaftcarryingthe gearwheel.

In both figures like letters of reference, wherever they occur, indicate corresponding parts.

A represents the cl1ain-drum,which is fitted to receive and securely hold the chain and compel it to move and prevent itmoving unless the drum moves. This may be accomplished by using projections or sprockets on the drum, or by providing it with recesses to receive the chain-links, as is commonly practiced. The hoisting-chain, orthe chain which takes the load, is represented at B, and it may be of any length. As one end of the chain rises the other descends and the load maybe connected with either portion. Theaxis or shaft A of drum A is journaled in suitable uprights or side pieces, as C O, which are to be mounted on any timbers, as D D, and there securely fastened.

E E are fragments of a cap or cover broken away to facilitate the illustration,which cover may or may not be used, as may be desired.

F F are safety-pawls of any pattern, swinging upon any axis or bar, as G, and arranged to engage with ratchet-wheels H H in such manner that when the drum is not purposely revolved to raise or lowerthe load the drum, and therefore the load, will be held from moving. By use of these pawls the load may be sustained at any desired height, and in case of accident to the load they serve to prevent its descent, and are therefore called safetypawls.

The shaft A carries a gear-wheel A ,which meshes with a smaller wheel 1 upon a shaft 1 parallel with A. This shaft 1' is journaled in the side or frame pieces, is located directly over shaft A, and extended toward the side opposite the above-mentioned gear-wheels to another j ournal-box 1 the latter being intended to be secured upon a timber, as K, at such convenient distance from timbers D D as will best admit the desired location of the hand-rope wheel.

L represents the hand-rope wheel of any suitable pattern fitted to receive an endless hand-rope, as M, by pulling down on either portion of which the drumis to be revolved and the load raised or lowered. I mount the hand-rope wheel upon a counter-shaft L, the same being journaled in a box L beneath timber K, and at its inner end in a box L on top of the nearest of timbers D. Upon shaft L is keyed a gear-wheel L which meshes with a smaller wheel L keyed upon shaft 1 at the proper point. Shaft L is located directly under shaft I, so that the strains and frictions due to the workings of the machine are the same, whether turning in one or the other direction.

The hand-rope wheel is turned in either direction, as occasion may require, and the drum is revolved accordingly, the weight or load being then raised or lowered with rapidity, ease, and certainty. The movements of the drum will depend upon the relative sizes of the gears, which may be changed,as required. The hand-rope wheel is located well to one side of the drum and its axis lowered as much as is convenient, so that the machine may be located close under any roof or overhanging object. The hoists are usually employed over shafts (and sometimes in connection with a car or platform) where economy of space and convenience of arrangement are important; but of course they may be employed in other situations.

When constructed and arranged in accordance with the foregoing explanations, my improvements are found in practice to admirably answer the purpose or objects of the invention hereinbefore indicated.

I do notclaim the chain-drum with its safetypawls alone; but,

Having now fully described my invention, what I do claim as new herein, and desire to secure by Letters Patent, is-

1. In a double-lift hand-hoist, the combination, with the chain-drum, of a main shaft geared with the shaft of the drum 011 one side and a counter-shaft located below the main shaft and geared therewith on the other side, said countershaft carrying the hand rope wheel, the parts being arranged to operate substantially as shown and described.

2. In a double-lift hand-hoist, the combination, with the main shaft geared to shaft A, of the counter-shaft L, j ournaled in boxes L? L and carrying the hand-rope wheel and op erating to turn the main shaft through gears L L the whole being arranged substantially as and for the purposes set forth.

In testimony that I claim the foregoing 1 have hereunto set myhand in the presence of two witnesses.

MICHAEL T. KENNEY.

WVitnesses;

JOHN BUCKLER, WORTH Oseooo.

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