US1583042A - Toggle-hoisting apparatus - Google Patents

Description

l. HILLS TOGGLE HOISTI NG APPARATUS May 4,1926. p 1 -,5s3,042

Filed Feb. 4:. 1922 Patented May 4, 1926.

ISAAC HILLS, OF ELMHUR ST, ILLINOIS.

TOGGLE-HOISTING APPARATUS.

Application filed February 4-, 1922. Serial No. 534,016.

To all whom it may concern:

Be it known that I, ISAAC HILLs, a (31th zen of the United States, and a resident of the village of Elmhurst, in the county of ing apparatus and particularly to a simple,

easily operable apparatus which may be employed to lift heavy articles upwardly along a chain or similar member.

It is an object of the present invention to provide a hoisting apparatus wherein the chain engaging means are automatically positioned.

It is also an object of this invention to provide a. hoisting apparatus having resilient means for positioning the chain engaging means and having means for automatically disengaging said chain engaging means.

It is a further object of this invention to provide a hoisting apparatus of the class described, having means associated with the operating lever for limiting the movements of the chain engaging means.

It is an important object of this inventionto provide a hoisting apparatus which may be economically manufactured and conveniently operated, and which acts to automatically maintain the hoisted article at any desired height.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a side elevation showing the hoisting apparatus of this invention in use.

'Figure 2 is an enlarged fragmentary side elevation of a hoisting apparatus.

Figure 3 is an enlarged fragmentary section on the line 3-3 of Figure 2.

Figure 4 is an enlarged elevation with parts in section showing the chain engag ingmeans.

As shown on the drawings:

L he hoisting apparatus of the present in vention is adapted to be used to move heavy articles along a chain or similar member 1 and comprises in general ,a lever 2- which has pivotally secured near one end hook 3 that isadapted to engage agslingt in which the load 5 is mounted. Pivoted on the lever 2 on either side of and separated a short distance from the hook 3 are chain engaging members 6 and 7 which have bifurcated hooks 8 of the construction shown in Figure 4 formed on their outer ends and adapted to be engaged over the links of the chain,the under side thereof resting on the top of the link directly below the link over which said bifurcated hook is engaged. Connected be tween points intermediate the ends of said chain engaging members 6 and 7 is a spring 9 which acts to draw said chain engaging membe s inwardly toward the spring and to pull the bifurcated hooks 8 on the ends thereof into engagement with the chain links. Stops 1.0, 11 and 12 areeformed on the upper side of the lever 2 on the outside of the chain engaging members 6 and 7 and between said members respectively, and said stops are adapted to limit the pivotal movement of said members and said lever, the stop 12 also acting to alternately disengage said members 6 and7 from the chain against the action of the spring 9 as the lever is lifted up and down.

In the operation of the apparatus, the hook 3 is engaged in the cradle or sling 4 in which the device to be lifted has been placed, and the chain engaging members 6 and 7 are engaged over the links of the chain in the manner indicated in Figure 2. The lever 2 is then rocked downwardly about the pivotal connection of the member 6 as a fulcrum, the stop 12 at the same time acting to disengage the chain engaging member 7 and to allow the same to move upwardly until it is pulled into the position indicated in dotted lines in Figure 2'by the action of the spring 9. The same action is then effected by lifting the lever upwardly about the pivotal connection of the member 7 as a fulcrum, the member 6 in this case being disengaged by the stop 12 and moved into engagement with the chain by the spring 9 at a point above the dotted line position of the member 7. In each of these operations the stop 10 and 11 serve the double purpose of limiting the relative movement of the chain engaging members and the lever 2 and of aiding in moving the members 6 and 7 into chain engaging position.

It Will thus be apparent that I have pro vided an apparatus whereby the principle of the lever and fulcrum may be eti'ectively employed in the hoisting of heavy loads, and it Will also be apparent that the lever may be released and the load will be maintained at any desired height.

While I have shown and described the apparatus herein in connection with a chain, it is of course apparent that the same might be conveniently used in connection With any other member affording means Which might be engaged by the hooks 8 or similar members.

The apparatus may be economically manufactured, is relatively light 111 Weight, and

can be readily adapted for a variety of uses.

I am aware that details in the construction thereof my be varied through a considerable range Without departing from the principle of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

A mechanism of the class described comprising a lever, load supporting means thereon, a hook pivoted on the lever on each side of said load supporting means, resilient means connected between the hooks, and stops on the lever betxveen and outside the hooks.

In testimony whereof I have hereunto subscribed my name.

ISAAC HILLs.

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