US245061A - Elevator - Google Patents

Description

3 Sheets-Sheet 1.

R.T. GRANE.

ELBVAZIJOR.

No. 245,061. Patented Au'g. 2,1881.

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. ELEVATOR.

No. 245,061. 4 Patented Aug. 2,1881.

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Y ELEVATOR.

No. 245,0 1, A Patented Aug. 2,1881

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N. PETERs Phnln-Liihnsmplsen Washington, D. c.

V To all whom it mayfconcarn:

A UNITED STATES PATENT OFFICE.

RIOHABD T. CRANE, OF CHICAGO, ILLINOIS.

ELEVATOR.

SPECIFICATION forming .part of Letters Patent No. 245,061, dated August 2, 1881.

Application filed November 7, 1879.

- Be it known that'I, RIoHARnT. ORANE,-lesiding at Chicago, in the county of Cook and State of Illinois, and a citizen of the'United States, have invented new and useful Improve ments in Elevators, of which the following'is a full description, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation. Fig. 2 is a front elevation; Fig. 3, a rear elevation of the parts represented. 'Fig. 4 is a plan. Fig. 5 is a central vertical longitudinal section of the parts shown, taken on line :19 of Fig. 4. Fig.6 is a detail. Fig. 7 is also adetail. Fig.8 is a detail showing an inside view of one of the arms or supports i.

The improvements which are herein set forth are all'adapted to be used in connection with a water-elevator, and ..I have shown them in connection with such an elevator, though some of them can bealso be used with other elevators.

The invention consists in a novel construction and combination of parts, which will be fully hereinafter described, and specifically pointed out in the claims.

In the drawings, A represents the cylinder of a water-elevator. a is the hoisting-cable. b is the safety-cable. These cables pass over pulleys c d e f. The two pulleys d f are in a frame'which is connected with the piston, and they are supported on a track, as usual. Each end of the safety-cable is connected, in a suitable manner, with a coil-spring so arranged that each spring will take up the cable a little or allow the same to yield a little under strain; As shown, one end is secured to a short movable rod located in bearings upon the top of the cylinder, the spring 9 being around the rod and between one of the bearings and a nut, pin, or enlargement 'on the rod. The devices at the other end of the safety-cable are similar to those just described.

B is a counterweight, which is connected directly with the working cable. As shown, this is done by means of a frame, O, which moves between the posts D D, in which frame the counter-weight is supported. The working cable is connected to the bottom bar and also to the top bar of this frame 0, which moves with .the cable and takes the place of a porpasses through holes in the upper and lower bars of the frame C, and the several pieces which together comprise the weight B are notched, so that the cables do not interfere with the removal of the same, nor with placing them in the frame.

Connected with the piston-head F is a disk, E, the connection between the two being by means of sliding rods and springs, which permit the disk to yield when it comes in contact with the flange h at the outer end of the cylinder.

3 i are two arms, connected with the inner end of the cylinder, or with some other suitable support, between which arms the two pulleys c e are located. In each arm is an opening, in which is placed a brake-block, j. As shown, these brake-blocks are each secured to a spring, 70, which is fastened in a recesson the inside of the several arms 6 t in such manner that the springs hold the brakes j away from the pulleys c 0 when such brakes are not forced against the pulleys. The brake-blocks,

as shown, are on the outside, tapering .firom the center toward each end.

G is a rod or bar hinged in suitable bearings. On this rod are two arms, I- 1, arranged so that by turning the rod G these arms will be brought into contact with the brakes and force them against the pulleys 0 6. These arms can operate the brakes from either end. at is another arm at the end of the rod G.

His a pulley, around which the shifting-cable it passes. I is another pulley, and 0 is a cord which passes around the two pulleys H I. This cord is also connected to the arm m on the rod G for the purpose of operating the brakes through the shifting-cable. J is anotherpulley.

p is a pinion engaging with a rack, g, on or connected with the rod of the valve which governs the flow of water into and from the cylinder. r is a cord passing over the pulleys I J. The pinion p and pulley J are on the same shaft. They operate the valve-rod q.

- Water is admitted into the cylinder through the pipe K N, and is discharged through N P,

a suitable valve being provided, as usual.

The operation of the several devices is as follows: The springs y g serve the double purpose of holding the safety-cable b reasonably taut, so that it will not slip off from its pultion of the cable. As shown, the safety-cable ICC leys or from any one of them, or become too loose thereon, and also that of allowing the same to yield a little for the purpose of relieving it from the strain of the load in case, from anycause, such safety-cable should become too taut.

The operation of the counter-weight is the same as in other cases but by being connected directly with the working cable the expense of one cable is saved.

The spring-stop connected with the piston of the cylinder, as shown, relieves the jar and strain which would otherwise follow from the sudden contact of the piston-head with the flange on the outer end of the cylinder.

There is frequently a little leakage around the piston-head of a water-elevator; hence if the platform is stopped before reaching its lowest point when descending, or if brought to a stand while ascending, it will begin to descend slowly in consequence of such leakage. This will be prevented by the application of the brakes, which can be operated by means of the shifting-cable and the other described de vices. The rack q, which is connected with the valve-rod, is operated simultaneously with the brakes. It is designed to have the brakes operated automatically, when the platform reaches its highest and lowest points, by buttons on the shifting-cable, which are in common use.

Theoperation of the discharge-pipe has been sufficiently explained.

The spring g at that end of the safety-cable which is connected with the platform could he used with elevators not operated by water.

I have shown one method of applying brakes to a water-elevator; but I do not limit myself to the de ices shown, as various modifications and changes can be made without departing from my invention.

What I claim as new, and desire to secure by Letters Patent, is as follows:

1. In a hydraulic elevator, the combination, with the cylinder and piston and the pulley f, connected and moving with the latter, of the safety-cable I), passing around the pulley and connected at its end with a spring, substantially as and for the purposes described.

2. In awatcr-elevator, the combination,with the cylinder and the piston, of a spring-stop connected to and moving with the piston, substantially as described.

3. In awater-elevator, the combination, with the cylinder and the piston having a pistonrod extending through the cylinder and operating the hoisting mechanism, of a spring-stop within the cylinder to relieve the hoisting-platform of sudden jars,substantially as described.

4. The combination, with the shifting-cable of an elevator, of a brake mechanism connected with the same through intermediate connections and arranged to be applied to a pulley or pulleys around which pass the hoisting-rope of the elevator, substantially as described.

5. In a hydraulic elevator, the combination, with the wheels 0 and e and the hoisting and safety cable passing around said pulleys, of a brake for acting on the pulleys and devices connecting said brake with the valve which controls the flow of water to the cylinder, and,

with the shifting-cable n, substantially as and for the purpose described.

RICHARD T. CRANE.

*Witnesses:

E. A. West, 0. W. BOND.

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