US486168A - Elevator-brake - Google Patents

Description

3 Sheets-Sheet 1.

(No Model.)

J. ROSE. ELEVATOR BRAKE.

No. 486,168. Patented Nov. 15,1892.

IN VENTOH ATTORNEY.

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.QZM $292M (No Model.) 3 Sheets- Sheet -2.

. J. ROSE.

ELEVATOR BRAKE.

No. 486,168. Patented Nov. '15, 1892.

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(No Model.) 3 Sheets-Sheet 3.

J. ROSE.

ELEVATOR BRAKE.

Patented Nov. 15, 1892.

WITNESSES:

A TTOHNE).

UNITED STATES PATENT OFFICE.

JOSEPH ROSE, OF MEMPHIS, TENNESSEE.

ELEVATO R-BRA K E.

SPECIFICATION forming part of Letters Patent N 0. 486,168, dated November 15, 1892.

, Application filed May 21, 1892.

' full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

This invention relates to certain improvements in elevator-brakes.

The object of the invention is to provide an improved automatic brake for hand-elevators exceedingly cheap, simple, and durable in construction and very effective in operation, whereby the movement or speed of the elevator can be easily regulated, so that all danger of the elevator racing up or down is avoided. 1

The invention consists in certain novel features of construction and in combinations of parts more fully described hereinafter, and particularly pointed out in the claims.

Referring to the accompanyingdrawings, Figure 1 is a diagrammatical view of the ole vator. Fig. 2 is a top plan of the gearing, &c., at the upper story of the building. Fig. 3 is an elevation. Figs. 4 and 5 are details, and Fig. 6 shows a modification.

In the drawings, the reference-letter a indicates the elevator-car.

1) indicates the ways at the sides of the ele-- vator-shaft. At the upper and lower ends of the shaft suitable supports are provided for the shafting.

0 indicates the hoistingdrum mounted at the upper end of the elevator-shaft-on horizontal shaft d. The hoisting-cable e is wound on the hoisting-drum and at its lower end is secured to the elevator-car.

f indicates the counter-weight moving in suitable ways in the elevator-shaft and suspended on cable f passing up over pulley f to and wound on the hoisting-drum, so as to counterbalance the car.

9 indicates the main or master pulley or wheel mounted on shaft 9' at the upper end of the ele vator-shaft. This shaft has a pinbrake is withdrawn.

Serial No. 433,843. (No model.)

ion 9* rigid thereon meshing with gear-wheel d on the hoisting-drum shaft. The handoperating or controlling cable It passes around and depends from said pulley throng out the length of the elevator-shaft and through or under guides at the lower end of the shaft. This hand-cable passes loosely through or in close proximity to the car, so that the operator can grasp the cable, and thereby rotate the main pulley in either direction desired to pull the car up or down. The hand-cable rotates the pulley and its shaft and pinion, which rotates the hoistingdruin through the medium of its shaft and gear to raise or lower the car in a manner well known and understood.

A suitable brake is provided to operate on some part of the gear controlling the movement of the elevator. This brake is here shown as and preferably operates on themain pulley.

t' indicates a sliding block or brake-shoe sliding in ways t" toward or from the periphery of the main pulley, which has a wide flange for this purpose.

j indicates a shaft mounted in suitable bearings at the upper end of the elevatorshaft and screw-threaded at one end, which end screws into a nut in the brake-shoe, the shaft j, 850., being so arranged that when turned in one direction it will force the brakeshoe against the pulley with great power, and thereby stop rotation thereof and hold the car against up or down movement, and when the shaft rotates in the opposite direction the The screw-shaft is provided with spools j, on which the brake-op crating cable It is wound or attached. This cable passes under suitable pulleys at the lower end of the shaft. At or near each floor this brake-cable is provided with stops Z m. Each stop is conical or tapered and formed in two or more longitudinalsections fitted on the cable and secured together and rigidly to the cable by means of screws or rivets "it, passed through the sections and the cable, whereby exceedingly strong rigid stops are formed on the cable. The stops Z taper upwardly and form stops against upward movement of the car, while the stops m taper downwardlyand form stops against the downward movement of the car. These stops are pref- ICO erably located at or near the differenttioors or other places where thecar is intended to stop. The caris provided with suitable means or attachments-such as gates,jaws, catches, or the liketo engage said stops and operate the brake mechanism to apply the brake and stop the car. Separate jaws or catches or other means are preferably provided to engage said stops and respectively arrest the car against up-and-down movement. These attachments carried by the car preferably consist of a pair of movable jawsq for each side of the brakecable. The meeting, ends of the jaws are V- shaped and beveled, so that when the jaws are held yieldingly together by springs 0" an opening will be left through which the brakecable can freely pass. Suitable frames 3 s are provided for these jaws. These frames are secured to the side of the car and have horizontal ways in which said jaws slide toward and from the brake-cable. A system of le yers t t is provided for each pairof jaws and is connected with each jaw to separate the same. Controlling-cords u, respectively, for each system of levers extend throughout the length of the elevator-shaft over pulleys at the ends thereof, and each controlling-cord is at one end secured to the car and at the other end to its respective jaw-operating lever or levers, so as to operate said lovers to open the aws when the controlling-cord is pulled in the proper direction, down or up, as the case may be.

The safety attachments or catches just described are arranged to engage the square or shouldered ends of the upwardly and downwardly tapered stops, respectively. Thus when the elevator is going up the jaws of one safety attachment or catch Wlll be separated by the downwardlytapered stops on the brake-cable to allow the stops to pass through, while the jaws of the other safety attachment, embracing the other side of the brake-cable, will engage the large end of one of the upwardly-tapered stops, and will thereby draw up the brake-cable and rotate the screw-shaft in a direction to force the brake-shoe against the main pulley, and thereby stop the upward movement of the car.

To permit the continuance of the upward movement of the car, the particular catchcontrolling cord to is pulled to separate the jaws to allow the same to pass the stop. The brake-cable is then pulled down to rotate the screw to release the brake from the main pulley. The car is now free to move up the next stop having the bottom large end. The operation is the same when the car is going down, only the other set of catches and stops are thrown into play. If desired, the operator in the car can open the various catches as they approach the stops, and thus avoid stopping the car at each floor unless the car attains an undesirable high rate of speed, when the catches can be allowed to engage the stops and immediately stop the car.

Various constructions of catches or stops carried by the car can be employed, and I do not limit myself to any specific construction. In Fig. 6 a double catch is shown; or, in other words, a single frame carries the catches or jaws or gates to arrest the car in both movements, whether upward or downward. This construction is provided with a circular way a, in which the outer ends of the jaws q slide, all four jaws being near a common center on a cross-bar. The jaws have the edge notches to receive the brakecable, and each pair of jaws is held together by a suitable spring, as shown. Each pair of jaws is operated by a lever r, pivoted to the supporting-frame and connected to the respective jaws by links 5' in such a way that the jaws of which pair will be swung open when the lever thereof is swung laterally by the controlling-rope.

The brake is self acting or automatic. Hence it is an impossibility for the car to run away when, either through carelessness or ignorance, the old style of brake is not prop erly applied, as the present brake automatically stops the car at every floor, thereby preventing the car running into the gearing or through the roof.

The many and great advantages and utility of this invention are obvious without fur ther explanations.

It is evident that various changes might be made in the forms, constructions, and arran gements of the parts herein specifically described without departing from the spirit and scope of my invention. Hence I do not wish to limit myself to the constructions disclosed.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination, with an elevator-car and its hoisting mechanism, of a brake to act on said hoisting mechanism, a brake-controlling cable extending throughout the elevatorshaft and provided with tapered or conical stops at intervals thereon, adjacent stops on the same side of said cable, tapering in the same direction, and spring-catches on the car, constructed and arranged to open and pass said stops when the small ends thereof are engaged, and thereby not move the cable, but to move the cable when engaging the other ends of the stops, and means to open the jaws or catches.

2. In combination, the elevator car and hoisting mechanism, a brake to stop the car, a controlling-cable for said brake, extending throughout the elevatorshaft and respectively provided with oppositely-tapered stops at intervals thereon, a pair of spring jaws or catches for each controlling-cable to engage the stops and move the cable for the purpose set forth, and means for opening each pair of aws.

3. In combination, an elevator-car, a hoisting mechanism therefor comprising a hoisting-drum provided with a counter-weight mechanism, a main pulley for operating the hoisting-drum, and a hand-cable passing over said pulley and through the elevator-shaft, a screw-threaded shaft, a brake-shoe on said shaft to move thereby into and out of engagement with said pulley, an operating-cable for said screw-shaft, extending from said shaft throughout the elevator-shaft and provided with stops arranged at intervals thereon, and the spring-jaws on the car arranged to engage said stops to apply the brake, and connections for opening said jaws, substantially as described.

4. In a hand-elevator, the combination of the elevator car, the hoisting mechanism comprising the main pulley, a screw-threaded shaft, a brake-shoe mounted thereon and moved thereby into or out of engagement with said pulley, an endless controlling-cable extending throughout the elevator-shaft from said screw-threaded shaft to rotate the same and provided with oppositely-tapered stops at intervals on its opposite. sides, respectively, and catches arranged substantially as described on the car that engage said stops and move the cable to apply the brakes.

5. The elevator-car provided with apair of notched jaws or catches, springs yieldingly holding the same together, ways in which said jaws slide, means for opening the jaws, a connection secured to said means for controlling the jaws and extending throughout the elevator-shaft, the hoisting mechanism, a brakecontrolling cable extending through the shaft catch when the car is going down, substan- J tially as described.

7. In combination, an elevator-car and its operating mechanism, an endless cable controlling said mechanism and extending throughout the elevator-shaft, the opposite sides of said cable being respectively 'provided with oppositely-tapered stops, two pairs of swinging spring-controlled jaws on the car, each side of the cable respectively passing between the jaws of one pair, levers arranged to open said jaws, and a connection extending through the shaft and connected to said levers to open the jaws, substantially as described.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

JOSEPH ROSE.

Witnesses:

T. O. VINTON, T. J. NEALIS.

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