US894922A - Spring-hoist. - Google Patents

Description

"W.- VAN W113. SPRING HOIST.

APPLICATION FILED 13170.6,1907.

No-,894,922. PATENTED AUG. 4, 1908.

Q/vi tn Mom Vanlh t a handle C WALTER VAN WIE, OF OAKLAND, CALIFORNIA.

SPRING-HOIST.

Specification of Letters Patent.

Patented Aug. 4, 1908.

Application filed December 6, 1907. Serial No. 405,406.

To all whom it mag concern:

Be it known that I, WALTER VAN WIE, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented a new and useful Improvement in Spring-Hoists, of which the following is a specification.

This invention relates to a spring hoist designed especially for use in machine shops and intended more particularly for lifting castings from the floor to a lathe bed and also for lowering the casting after it has been turned. I 1

The invention consists of the novel features hereinafter described, pointed out in the claims and shown in the accompanying drawings in which- Figure 1 is an elevation showing the device in position ready for use. Fig. 2 is a similar View showing the casting lifted Fig. 3 is a detailed side view of the lower ortion of a spring and illustrating a double 00k formed upon the spring.

- In these drawings A is a bracket intended to be secured to an over head joist and to which is secured the upper end of a coil spring B. The lower end of this spring terminates in a double hook B to one member of which is secured a chain C. Upon the chain C is secured a sleeve C which carries In the floor is inserted a plate D and a cable E is provided with hooks E at each end one of which is inserted in a plate D and the other is engaged by one of the hook members D The operation of the device is as follows: The cable E is hooked to the plate D and to the spring B thus extending the spring. The casting to be lifted and indicated at F is secured to the chain C by a rope or cable F or in any other desired manner, and the handle C is grasped by the end and pulled downwardly until the handle 0 takes a vertical position.

This throws the sleeve 0 and the portion of l i i the chain C parallel to the floor and shortens byv the length of the sleeve C the vertical hang of the chain, thus throwing the weight of the casting upon the spring B and relieving the hook E at the upper end of the cable E of a portion of the tension of the s ring. This hook is then disengaged and the contraction of the spring will lift the casting to the level of the lathe bed and it can readily. swung into the desired position. To lower the casting the operation above described is reversed, the cable E being hooked to the spring after the casting has descended.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is 1. A device of the kind described comprising a sus ended coil spring, detachable means for olding said spring extended, a chain connected to said spring, a sleeve on the chain and a handle carried by the said sleeve.

2. A spring hoist comprising a suspended spring adapted to contract and extend, means for holding said spring temporarily in extended position, a chain depending from the lower end of said spring, and means carried by said chain for holding a portion of the chain in the horizontal position, as and for the purpose set forth.

3. A device of the kind described comprising a vertically arranged coil spring, a cable secured to a fixed support at its lower end and having a hook at its upper end for engagement with the lower end of the spring, a chain secured to the lower end of said spring, means for connecting the casting to said chain, and means carried by the chain for shortening its perpendicular length after the casting has been attached thereto. WALTER VAN WIE.

Witnesses:

A. C. HOMMELL,

E. V. HARTMAN.

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