US401449A

US401449A - Elevator

Info

Publication number: US401449A
Authority: US
Publication date: 1889-04-16
Anticipated expiration: 1906-04-16

Description

(No Model.) 2 Sheets- Sheet l. W. H. MILLIKEN.

ELEVAIOR.

No. 401,449. Patented Apr. 16, 1889.

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UNITED STATES PATENT EEIcE.

VILLIAH H. MILLIKEN, OF PHILADELPHIA, PENNSYLVANIA.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 401,449, dated April 16, 1889.

Application filed November Z2, 1888. Serial No. 291.557. (No model.)

To all? whom, it may concern:

Beit known that I, WILLIAM H. MILLIKEN, of Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Elevators, whereof the following is a specification, reference being had to the accompanying drawings.

My invention has particular reference to that class of elevators in which the car or cage is supported upon avertical stem or piston to whose lower end th epower is appliedsuch, for instance, as the ordinary hydraulic elevator.

As heretofore constructed the counterbalance-weights have been used in connection with such elevators, and have been attached to the top or other convenient portion of the car. The joint between the stem or piston and the car is a point of more or less weakness in the structure, and in actual experience breaks have occurred whereby the car has become separated from the standard. Under these circumstancesl the entire wei ght of the counter-balancewas thrown upon the car itself and detached from the piston, with the result that the car was carried violently to the top of the shaft, and then, by the breaking of the supports, permitted to fall and be completely wrecked.

My invention has for its object the avoidance of this danger; and it consists in a counterbalance system which is connected with the piston itself at a point sufciently low down to obviiate the danger in the event that the car should become detached.

In the accompanying` drawings, Figure l represents a vertical section through the car and shaft, portions of the piston-socket being broken away. Fig. is a similar view of a modiiicat-ion embodying the same principles, but differing slightly in detail.

In said drawings, A represents the elevator-car; B, the casing;` of the elevator-shaft,

forming' guides therefor; C, the piston or stem, which enters the hydraulic cylinder and which is actuated in the Well-known manner.

At some convenient point within the piston C, and preferably at the lower end thereof, I attach a strong,` double rope, F, a convenient method being to pass it round the pulley E, secured to the head of the piston. The ropes F, on reaching the elevator-cage, diverge and pass around the sides thereof, where they are attached to chains G, which may be concealed and guided between the flanges or strips D on the inside of the shaft. Said chains G extend to the top of the shaft and there pass around pulleys H to the usual counterbalance-weights, I, whose construction is Well understood.

In Fig. 2, o. is the car; h, the casing of the shaft; c, the piston; f, the ropes attached, as before; but in this instance the two ropes, after diverging and passing round the cage, are brought together again, as indicated, and attached to a centrally-located eye, k, to which are secured several small ropes, g, passing around a common pulley, h, and thence to the counter-balance Iz". This arrangement is, as above stated, similar in principle, but may be found a convenient modification of the device.

Havingl thus described my invention, I claim- In an elevator system having a car and an actuating` piston attached to the bottom thereof, the combination, with said piston, of a counterbalance-weight and a rope supporting the same, said rope being attached to the piston at a point below joint with the car, substantially as set forth.

l WILLIAM Il. MILLIKEN. Witnesses:

LEWIS R. DICK,

JAMES H. BELL.