US317268A - Safety device for elevators - Google Patents

Description

(E0 Model.) I Y M. L. WRIGHT.

' SAFETY DEVICE .EOR ELEVATORS.

E Patented May 5, 1885. i A

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, NITED STATES PATENT 'QFFICE.

MARCUS L. WRIGHT, OF NEWTON, NEW JERSEY.

SAFETY DEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 317,268, dated May 5, 1885.

Application filed March 30, 1885.

To aZZ whom, it may concern.-

Be it known that I, MARCUS L. WRIGHT, a citizen of the United States, residing at Newton, in the county of Sussex and State of New Jersey, have invented certain new and useful Improvements in Safety Devices 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.

The object of my invention is to provide simpler and more direct means for stopping the elevator-car when an obstruction projects from it than that shown in the patent granted to me March 10, 1885, No. 313,842, still retaining several elements of the combination therein shown.

of an elevator-well, showing the improvement arranged in connection with an elevator-car. Fig. 2 is a plan view of the screen and its immediately connected parts, the pull-rod being mostly broken away.

Like letters refer to like parts.

X represents the elevator-car, and X the hoisting-rope, the .latter being operated by the motor in any of the usual ways.

At one or all sides of the well, as the case may require, is the solid screen A, which,

whenstruck by an obstruction projecting from V the car, rises in the grooves or guides g g, arranged on .both sides of the screen. On the back of the latter are two geared racks, h h, extending from the foot-board g nearly to the top.

From the floor-beam Y depend hangers Z Z,

(No model.)

in which is jou-rnaled the transverse rotary shaft W, provided with pinion-wheels c c, for engaging with the racks, and at one end with a crank, (Z. By having the geared racks and pinions the screen is prevented from binding in the guides when an object strikes one of its sides, for as fast as one side is lifted the turning shaft must lift the other equally so.

F is a counter-weight, and it is suspended by a belt, f, which passes over shaft W' down to the bottom of the screen, preventing the latter from falling below a certain level, and causing it to rise as easily as possible. As the crank d turns it draws the pull-rod H by means of a pin, d, passing from the latter through a T-head fastened to rod H by a set screw. On the outer end of said rod there is acollar, K, attached by a set-screw.

Rigidly fastened to the main shaft M is a lever, L, having an eye, 1, which encircles rod H, and affords a means for transmitting the pull of said rod and its collar to turn shaft M through lever L. Shaft M rests in a step, m, at or near the bottomof the well, and there may be a corresponding one at the top. Some distance below lever L another lever, N, is fastened to shaft M. To lever N is bolted an eye, 0, and from this a chain, r, extends to an eye, 1), on the trip R. A plate, S, is fastened to one side of the well, and is provided with a ledge, s. Between this and a ledge, s, on the weight T extends the trip, which is hinged at the three points shown, (see t t t Fig. 1,) so as to buckle up easily when pulled by the chain r. The weight is provided with the guides T T, and below there is a buffer, \V, to deaden the fall. It has also a bracket, Z, which in the fall strikes a bracket, Z, attached to the guide-rope a, and exerts a pull on the latter to stop the car. around a pulley, 2, on shaft 3, which may operate a belt-shifter or shut off the motor directly, neither of which it is here necessary to show. In order to lock the shaft M from returning when the trip is pulled out from under the Weight, a hook, 4, is attached to a plate, 5, on the side of the well, and operates as follows: When the lever N is moved sufficiently to act on the trip, the pivoted hook 4 drops over its shank, locking the former and preventing shaft M from returning, and if the The rope finally passes screen still moves up the rod H will work 1 back or forward through the eye 1 of lever L without turning shaft M; but the screen and its connections will have very little play, as the motor is so quickly shut off, and no breakage is likely to occur. It will of course be understood that at each floor-landing a screen and the connected parts may be arranged with the main shaft.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. The combination, with the elevator-car, of the solid lifting-screen provided with a counter-weight and geared racks, the lateral guides, the transverse rock-shaft having pinion-Wheels and a crank, the pull-rod and its collar, the lever having an eye engaging with said collar and rod, the main shaft and the lower lever thereon, the chain and trip, the suspended weight adapted in falling to pull directly on the guide-rope, and the said guiderope, as set forth.

2. The combination, with the elevator-car, of the solid screen A, provided with a counter-weight, F, and the geared rack h h, the guides g g, the rock-shaft WV, suspended by hangers Z Z, and provided with pinion-wheels c c and crank d, the pul1-rod H, having a T- head with pin (1 and collar K, the lever L and eye 1, the main shaft M, the lever N, the eye and links 0 1", the trip R, having eye 10 and hinged at t, t, and t the plate S and ledge s, the weight T. having bracket Z and ledge s, the guides T, and the guide-rope a, having bracket Z, as set forth.

3. The combination, with lever N and main shaft M, operated substantially as described, of the pivoted hook 4, as and for the purpose set forth. I

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

. HARCUS L. WRIGHT.

Witnesses:

WILLIAM H. PALMER, ALBERT I. LANE.

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