US73360A

US73360A - Improvement in windlass

Info

Publication number: US73360A
Authority: US
Publication date: 1868-01-14
Anticipated expiration: 1885-01-14

Description

@citen tsttra sttrnt @Hira- WILLIA'M `(SrItAliAllI MCIVOR, OF LIVERPOOL, "ENGLAND,

' Letters Patent No. 73,360, dated January 14, 1868.

IMPROVEMENT IN WINDLASS.

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Be it known that I, WILLIAM GRAHAM McIVOR, of Liverpool, England, have invented anew and useful Improvement in Windlasses; and I do'hereby declare that the following is a full, clear. and exact description thereof, which will enable others skilled in the art to make and use' the same, reference being had to the accompanying drawings, forming part of this specification.

This invention consists in applying a. spring to a windlass in such a manner that as the windlass-drum is turned and the rope or chain unwound from it, the spring will be wound up and rendered subservient as a power, in assisting-to wind the rope or chainfupon the windlass-drum and elevating or moving the article which, isattached to the rope or chain. The invention also consists in a novel application of gearing to ithe windlass tov wind up the rope ,or chain, whereby the spring is wound up as the rope or chain is wound upon thewindlassdrum. In the accompanying sheet of drawings- Figure 1 is a transverse vertical section of my invention', taken in the line x 2:, fig. 2.

Figure 2, a plan or top View of the same.

, Figure 3, a section of a portion of the same, taken in the liney y, tig. 2.

Similar letters of reference indicate corresponding parts. i

' A represents a frame or stock, in which the wiudlass is, placed, and .B represents the drum ofthe windlass,v which is hollow, and connected with its shaft, C, hy'means of coil-springs, D, the wire ends of the springs being attached to the shaft C, and the outer end attached to the inner side o f' the drum B, as shown in iig. 1. To one end of this drumB there is attached a toothed wheel, DIX, with which a holding-pawl, E. engages, as shown in figs. 1 and 2. To one end of the shaft .0, of the drum B, there is attached a wheel, F, which is provided with two s ets of teeth, a b, one set, d, being what are common-Ly termed spr-tceth, and the other set, b, ratchet-teeth,

l two plaw1s,F FX, engaging with the latter. These pawls maybe raised and freed from the ratchet-teeth at any time'by actuating a lever, G, arranged or applied in any proper manner. Into the teeth a, of the wheel F, i a pinion, H, gears, and this Api'nion is on the shaft of a wheel, I, which is turned by hand, and has a brake-lever, J, arranged in such relation with it that said levermaybe applied to the periphery of I whenever necessary. The windlass-drum, B, is provided with a friction-brake, K, which is operated or applied by a lever, L. M is i the rope or chain,which is attached to the drum B, and is wound upon and unwound from it.

- The operation is as follows: Suppose, for instance, that the invention be applied to a ships mindless, and that .the anchor beraised, and the rope or chain wound upon the drum B. In lowering the anchor, the rope or .chain M will, in turning the drum B, wind up the springs D, and the latter will consequently serve as a power in winding the ropeor'chain M'on the drum to raise theanchor. it beingy understood that :he shaft C iskept. stationary by thepawls FX engaging with the teeth a o wheel Ff In raising the anchor. the drum'h'B is `turned by turning the wheel I in the direction indicated by` the arrow 1, the power being transmitted through the springs D, andthe power of the latter is 'thereby kept 'up and increased. In lowering the anchor, (letting out the chain or cable,) the wheel I may be turned iu the opposite direction to arrow 1, but before this is. done said wheel is turned a trii'ie forward, in the direction of arrow 1, so that the pawls FX may, by actuating lever G, be raised from the teeth cof wheel F, and the'shaft C and drum B are thus both relieved, and any quantity of chain or cable may be freely given out, the speed of the rotation ofthe drum B being regulated by the brake J, and the wheel I may be entirely stopped by the brake when desired, so as to admit of the springs D being wound np under theweight of the anchor. In raising the anchor, the pawl E must be disengaged from the wheel DX, and the pawls FX-allowed t'o'engage with the teeth a of wheel I', the wheel I being turned in the direction indicated by arrow 1. l Having described my invention, what I claim as new, and desire to secure oy Letters Patent, is'L i The application of springs to a windlass to operate in the manner substantially :is and for the purpose l specified.- i v v f The above speciiication of my inventionsigned by me, this day of 1867. Y i WILLIAM GRAHAM' McIVOIi.

Witnesses:

- LI. LABK, Jamas DAIsH..