US59137A - Improvement in hoisting-machines - Google Patents

Description

nventor f fag@ Witnesses.

UNITED STATES PATENT OFFICE.

HENRY J. REEDY AND JAMES HEEDY, OF CINCINNATI, OHIO, ASSIGNORS 'TO JAMES REEDY.

IMPROVEMENT IN HOISTING-IVIACHINES.

Specification forming part of Letters Patent No. 59, 137, dated October 23, 1866.

To all whom it may concern:

Be it known that we, HENRY J REEDY and JAMES REEDY, both of Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Hoisting-Machines; and we do hereby decla-re the following to be a full, clear, and eXact description thereof, reference boing had to the accompanying drawings, making part of this specification.

Our improvements relate to the class of elevators whose platform is suspended from and operated by a drum or windlass, and princi-A.

- ary stanchions B, extending through every Hoor. C is the driving-shaft, having a pulley, D, for the operating-rope E, and a pinion, F, which gears with a spurwheel, G, upon the windlass H. Rising from the platform I isa frame consisting of two standards, JJ', united by a beam, K. Lugs L, projecting from the standards J J', embrace guide-posts M M', attached to the stanchions.

N N' is a branched stirrup, which embraces the beam K at its mid-length and carries at its upper part a sheave, O. P is a cable attached by its respective ends to opposite extremities of the windlass H, and having its bight rove around the sheave O. Q. is a cable attached to the windlass H on the opposite side from the cable P, and being rove around a sheave, R, is returned over the windlass and made to enter a trunk, S. To the free extremity of the cable Q is secured a counterbalance, T. Y

U is a brake or lever, having its fulcrum u' in the stanchion, and provided on its under side with a pad, V, adapted to press upon the periphery of the pulley-D when the lever is depressed by the operator drawing on the cord W. u" is a weight on the rear end of the lever. The end u of the lever U is reduced in thickness, so as to form a spring, and carries a rack, u', on its upper edge to receive a lock, X, also fulcrumed at x' to the frame, and weighted at x at its rear end.

W' is a cord attached to the lock X, and which being depressed catches in the teeth of the rack u' and holds the brake firmly down upon the periphery of the pulley D, until re leased by the depression of the yielding or elastic portion a of the brake U.

In order to guard against the fall of the platform, by the giving Way ofthe cable P, we have provided two serrated eccentrics, Y Y', which, in the normal condition of the platform, are held against rotation by spring-bolts Z Z'; but when the bolts are released by the drop ping of the stirrup N they ily back and per= mit the cams to swing toward the posts J J', so as to engage and bind there against and effectually'prevent the further descent of the platform.

Among the advantages of the above construction the following may be cited:

First. In the hanging of the platform the double lines obviate a diagonal pull, thereby reducing the friction on the platform guides,

and producing a central lift, being applicable to all ordinary warehouse hoisting machinery. The beam-pulley equalizes the weight on each line, thereby balancing the platform' in a superior manner.

Second. The adjustment of the counterbalance-weight. Being suspended from the hoisting-roller, it communicates its weight directly to the machinery of the same, thereby producing an easy movement. Furthermore, it recom mends itself in a convenience point of View. Being arranged in the hatchway, it occupies vacant ground. Where the counter-balance is hung at right angles with the hoisting-roller,

or in other position than the above, it becomes objectionable in the majority of cases, and experience has demonstrated that this' adjustment is superior to the ri ght-an gles adjustment in its workings.

Third. The brake and'loeker at right angles to theiplane of the pulley. This arrangement throws the cheek-lines in close proximity to the platform, they passing through the hatch- Way beside the same. The brake being of oak or hickory is weakened at the bearing on the wheel-rubber sufficiently to give elasticity to that lever, thereby assisting the Working of the locker. This, as may be seen, acts upon the brake when the operator is desirous of making fast the platform at a particular floor. The locker, by means of the weight attached to the same, disengages itself from the brake when that lever, being slightly elastic,is drawn down, thereby making the unfastening movement self-acting.

Fourth. The safety-eccentric obviates the expense of an iron post-ratchet. The cam being arranged with sharp teeth strikes out by its own gravitation on the post or hatchway. The beam-rod surrounded bythe spiral spring disengages itself from the teeth ot' the eccentric so soon as the beam strap falls, the rod shooting in between the beam and the strap.l

Fifth. Our arrangement further possesses, 'over all single-line hoisters, the several advantages of freedom from fraying ot' the coils, one against or riding one upon another, and, consequently, last much longer. There is also avoided the sudden jar incident to the slipping of one coil off of another.

We claim herein as new and of our invention- 1. `The mode, substantially as described, of supporting and elevating a hoisting-platform, I, by a single rope, P, Whose ends are secured to opposite extremities of the Windlass il, whileits bightor middle portionis rove through a sheave, O, upon the platform, for the purpose described.

2. Gounterbalaucing a hoisting-platform by a Weighted cord, Q, which, being carried horizontally over one end ofthe Windlass, traverses. a shcave, R, and is carried back and secured to the Windlass at or near its mid-length and on the reverse side from thehoisting-cable P.

3. The self locking and releasing brake U X, arranged and operating substantially as set forth.

4. The provision of the serrated eccentrics YY', spring-bolts Z Z', and stirrup N, the Whole operating as a safety-check in the manner explained.

In testimony of which invention we hereunto set our hands.

HENRY J. REEDY.

JAMES REEDY.

Witnesses:

GEO. H. KNIGHT, J AMES H. LAYMAN.

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