US388297A - Safety apparatus for elevators - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

J. A. MOORE.

SAFETY APPARATUS FOR ELEVATORS.

No. 388,297. Patented Aug. 21, 1888.

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N. PETERS. Pmwmho n hu, Washington. D. c.

(No Model.) 2 Sheets-Sheet 2.

J. A. MOORE.

SAFETY APPARATUS FOR ELEVATORS.

No. 388,297. Patented Aug. 21, 1888.

llnrrsn Srarss JOSEPH A. MOORE, OF BOSTON, MASSACHUSETTS.

SAFETY APPARATUS FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 388,297, dated August 21, 1888.

Application filed March 1, 1888.

To aZZ whom it may concern:

Be it kno n that I, Josnrn A. MOORE, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Safety Apparatus for Elevators; and I do declare the following to be a full, clear, and exact description of the invention, such as 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 and figures of reference marked thereon, which form a part of this specification.

Figure 1 represents a front elevation of an elevator-car and its guideways, and a portion of the shipper-operative mechanism with my invention applied thereto. Fig. 2 is a vertical and transverse section, and Fl". 3 a side elevation, of the car. Fig. i is a vertical section, and Fig. 5 a top view, of one of the boxes or guides K and its slide. Fig. 6 is an edge View of the slide. Fig. 7 is a top View of the guide for the cable secured to the top of the boX K.

The nature of my invention is defined in the claims hereinafter presented.

In carrying out my invention I arrange in the well or space in which the car travels two Wire cables, A A, each of which depends from a headed slide, 13 or 0, supported and arranged to slide in the frame-work D over the well. A spring E encompasses the shank'of each slide and bears against the under side of the head of it and on the top or upper side of the frame-work, as shown. The cables at their lower ends are secured to the bottom or lower part of the well, they being strained sufficiently to keep them in place. Secured to the said framework is a bracket, F, to which is pivoted a lever, G, the shorter arm of which projects under the head of the slide O, and the other orlonger arm is connected by a chain, wire cable, or rod, H, with the grooved wheel I, which receives the shippercable.

Each of the cables A A passes down through or is encompassed by one of two guides or boxes, K K, secured to the car, and said guides are each provided with a soft-metal jaw, a, firmly connected therewith, as shown.v Within the chamber b,in the guides through which the cables pas is arranged a slide, L, which is also provided with a soft-metal jaw, c, securely attached thereto. The back edge of the slide is inclined at d to correspond with the incline e of the chamber 1), and the slide has a slot, f, inclined to correspond with the edge (1, and into or through which a bolt, 9, secured to the box or guides, projects to keep the edge (1 against the incline a during the vertical movements of the slide, so that when the slide is depressed the jaw 0 will move away from the jaw a. A guide, 1, (shown in top view in Fig. 7,) is secured to the top of the box K to keep the cable in its due relation to the jaws of the box and slide.

Supported in bearings secured to the upper portion of the car is a horizontal shaft, M, which has fastened to its ends two arms, N, pivot-ed to the ends of which and to the slides L are connection-rods h.

Fastened to the shaft M between its ends is an arm, N, connected by a link, 17, to a lever, O, which is pivoted at its other end to the car, or to a bracket fastened thereto, as shown at 00.

Connected to the lever O is a rod, 1?, provided at its upper end with a grooved head, It. The rod 1? is adapted to move vertically in a tubular standard, Q, fastened to the car, and on which the body B of a governor,S, revolves.

Pivoted to the body of the governor are the ball-levers T, the shorter arms of which project into the annular groove in the head 7:. The body R of the governor has fixed to it a grooved wheel, U, around which and partially around two sheaves,V W',pivoted in a bracket secured to the car,a rope, Y, extends, as shown in Figs. 1 and 3.

Z is the cable from which the car is suspended in the usual manner.

A spring, a, attached to the lever O and to the car, assists in raising the said lever, so as to keep the slides out of contact with the cables A when the car is moving at its usual speed.

The operation of my invention may be thus described: \Ve will now suppose the car to be moving on its ways and the governor,by means of the rope Y, to be revolving. Said governor is to be so adjusted that the balls will hang down when the ear is traveling at the usual or required rate of speed. Now, should the hoisting-cable Z break and the car fall, the increased speed imparted to the governor by ICO the rope Y will spread the balls, depress the rod 1? and lever O, and through the linki and arm N will turn the shaft M in its bearings, and consequently raise the arms N, connection-rods h, and slides L, and thus cause the jaws c to bear the cables A against the jaws a with sufficient force to stop the car in its descent and lock the car to the cables A. It will be observed that on account of the cables being secured to the slides B O, sup ported on springs, as described, the car will be checked gradually because of the elastic stop, and consequently there will be less liability of injury to the occupants of the car than if the car were checked suddenly. As the head of the slide 0 descends on account of the Weight applied to its cable,it will turn the lever G on its fulcrum, and by means of the chain, cable, or rod H, attached to it and the wheel I, will turn said wheel I and move the shipper-operating cable, so as to stop the movement of the machinery of the elevatorcar.

The drawings represent the car as clamped to the cables A A.

Having described my invention, what I claim 1s 1. In an elevator, the cables A A, the headed slides B 0, provided with springs and supported substantially as described, and the guides or boxes K K, fixed to the car and each nection-rods h h, arms N N, shaft M, arms N,

link 2', and lever O, pivoted to the car, the governor receiving its motion from a rope suspended in the well and passing around the grooved wheel. U and over sheaves V W, secured to the car, all as shown, and essentially as set forth. I

2. The combination of the car and the clamp with the cables A A, the slides 13 13, supported essentially as shown, the springs E E, the lever G, the shipper-wheel, and the rope connecting said lever and wheel, as set forth.

3. In an elevator safety device, the box or guide K, chambered,as shown, and provided with the jaw a, incline e, and guide Z, in combination with the slide L, having the jaw c and slotf, through which extends the bolt 9 and connects the slide to the box, all substantially as represented.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH A. MOORE.

Witnesses:

S. N. PIPER, L. N. MiiLLER.

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