US325614A - Territory - Google Patents

Description

(No Mudel.)

v I. I. LANCASTER.

HOISTING AND LOWERING APPARATUS.

Patented Sept w 1 AA @A A. v

WITNESSES I ATTORNEYS.

N. PETERs PbuftrLillmgraphzr. Wuhingwn. DJ;

FFlClEO ISAAC I. LANCASTER, OF TACOMA, ASHINGTON TERRITORY.

HOISTING AND LOWERlNG APPARATUS.

EEPBCIFICATION forming part of Letters Patent No. 325,614, dated September 1, 1885.

Application filed June 20, I895. (No model.)

To all whom it may concern.-

Be it known that 1, Isaac I. Lnwcasrnn, of Tacoma, in the county of Pierce and Territory of Vashington, have invented a new and Improved Hoisting and Lowering Apparatus, of which the following is a full, clear, and exact description.

My invention relates to apparatus for hoisting and lowering anything by the aid of a windlass and jack, and has for its object to provide a simple, efficient, cheap, and durable machine for these purposes.

The invention is an improvement on United States Patent No. 4S,t1-t, issued to Isaac l. Lancaster, and dated June .27, 1865; and it consists in novel arrangements ofspri ngs which actuate the pawls in various uses of the machine, and also in other novel constructions and combinations of parts of the machine, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation of my improvement with the lever broken away and the pawls in positions to allow rapid lowering of the weight or load. Fig. 2 is a plan view, with the post of the lifting-jack in horizontal section. Fig. 3 is a longitudinal sectional elevation taken on the line a: :0, Fig. 2, with the parts arranged for hoisting a load; and Fig. 4 is a like viewillustrating the action in slowly lowering the load.

The letter A indicates a suitable frame, in the side parts, a a, of which is journaled a shaft, B, on which is fixed a ratchet-wheel, O, with which are adapted to engage the pawls D D, which are pivoted, respectively, to lugs c c on the short arm 'of a lever, E, which is pivoted by its shaft F to the frame A, and has suitable length to give a powerful leverage in working the pawls, as presently eX- plaincd.

To the lever E is fixed one end of a spring, G, which at the proper time acts by its free end against a pin, 9, fixed in the side of the pawl D, to throw said pawl away from the teeth of the ratchet G. A spring, G, pivoted at 9" to the lever E, may be swung on said pivot so its free end g may be allowed to press the pawl D upward from the ratchet-teeth, as in Figs. 1 and 4,01 so as toibe free from the pawl D, as in Fig. 3. A spring, (I, fixed to pawl 1), may bear on the pawl D to force it to the ratchet O, and a spring, G fixed to pawl D. has alike effectin certain positions of the paws, as hereinafter described.

At H is shown a bar having a head, h, bent over pawl D, so as to retain the pawls in worlc ing position.

\Vith the exceptions that I have made the spring G straight to act on a projecting pin, 9, tolift thepawl D, instead of bending the end of the spring sidewise beneath the pawl, and have added the spring G to the lever and pawl mechanism, all the parts above named are the same in construction as the frame, ratchet, and lever and pawl mechanism shown and de scribed in the aforesaid Patent No. 48,414.

In a suitable head-block, I, fixed to frame A, is fittted to slide the post or bar J, having teeth j, which are engaged by the teeth of a pinion, K, fast on shaft B, when the post J is applied to the machine for use as aliftingjack.

To the shaft B is fitted loosely the Windlassbarrel L, to which a rope, I, is connected, and the barrel L has a collar, M, provided with slots or notches m, into which may'enter the pin N, fixed in shaft 13, when the barrel is forced outward from the frame A by means of a lever, O, which is pivoted on a pin, 0, to frame A, and has a forked stem or part, 0, which engages or yokes around opposite faces of a disk or collar, 1?, fixed to the barrel L; and below the stem 0 the lever O has an arm, 0, which is shaped to bear upon the periphery of the disk P and serve as a brake in lowering the load suspended from the rope Z when the barrel is swung toward the frame A by the lever to disengage the notches on of collar M from the pin N on the shaft l3, as will readily be understood.

The operation of the ratchet and pawl mechanism being particularly described in aforesaid Patcnt No 48,414, a brief description of it here will suffice.

To turn the ratchet G to lift a load either by the jack J K or the windlass L I, the lower spring, G, will be swung out from under the pawl D, as in Fig. 3, and by rocking the lever E the pawls D D will alternately engage the ratchet O for turning it as required, the spring Jr" then acting to press the pawl D to the ratchet, so as certainly to engage the ratchetteeth at every downstroke of the lever, which the pawl would not always do when the spring G" was not applied to it, as in the former construction. Hence the advantage ofsaid spring is obvious.

To allow the load to run down quickly, the spring G will be swung under pawl D, and the lever E will fully be pushed down, as in Fig. 1, so that both pawls D D will be clear of the ratchet O, the upper pawl then resting against the retainer H, and this will be the operation when a weight suspended from the windlass-barrel L by rope Z is to be allowed to drop with full force, as in driving piles, posts, and thc like, the Windlass-barrel then being disengaged by lever 0 from the pin N; and when the load is to be let down easily or controlled at any point of its descent the arm 0 of lever 0 may be pressed to disk 1?, while the pin N of shaft B is engaged with the Windlass-barrel.

To let the load down slowly at any time by using the pawls, and when the brake O P would not be effective-as, for instance, when loweringthe jack Jthclevcr E will be rocked slightly to hold the load by one of the pawls while the other is retracted, the springs (Z G holding the lower pawl, D, to the ratchet, the spring G in this instance also coming into action to insure the more positive engagement of the pawl D with the ratchet than would be afforded by the spring (I alone; and by the action of the edgewise straight spring G on the ping to lift the pawl D out of engagement with the ratchet G as said pawl is withdrawn or retracted, there will be much less danger of breaking the spring than when the end of the spring was bent laterally beneath the pawl, as in the construction described in said Patent No. 48,414.

The pinion K and jack-post standard or guide 1 add little weight to the machine, and

the jack-post J may almost instantly be adjusted in the standard or frame when required for use Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a ratchetwheel and Windlass, of pawls D D, lever E, retainer H, and spring G, fixed to pawl D to act on pawl D, substantially as herein set forth.

2. The combination, with a ratchet-wheel and Windlass, of pawls D D and lever E, said lever carrying a spring, G, and the pawl D having a pin, g, on which said spring acts, and the spring G substantially as herein set forth.

3. The combination, with a ratchet-wheel and Windlass, of pawls D D, said pawl D having a pin, 9, and the springs G G G d, a retainer, H, and lever E, arranged and operating substantially as herein set forth.

4. In ahoisting and lowering apparatus, the combination, with the frame A, shaft B, ratchet O, pawls D D, springs, substantially as described, adapted to act on the pawls, and lever E, of the pinion K on shaft B, and the re movablejack-post J j, supported and guided in the frame, substantially as herein set forth.

5. In a hoisting andloweringapparatus, the combination, with the frame A, shaft B, having pin N, ratchet O, pawls D D, springs, substantially as described, adapted to act 011 the pawls, and lever E, of the barrel L, having collar M and disk 1?, and notched at m, and the lever O, pivoted to frame A, notched at 0 and provided with the brake-arm 0 substantially as herein set forth.

6. In a hoisting andlowering apparatus, the combination, with the shaft B, having pin N, and the barrel L, provided with disk P, and having its hub M notched at m, of the pivoted lever O, notched at 0 and provided with the brake-arm 0 substantially as shown and described.

ISAAC I. LANCASTER.

Vitnesses:

EDWIN CLARK, SAMUEL Y. LISTER.

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