US561232A

US561232A - Richard f

Info

Publication number: US561232A
Authority: US
Publication date: 1896-06-02
Anticipated expiration: 1913-06-02

Description

R, P. LB BRocQ. AUTOMATIC SAFETY ATTACHMENT FOR ELBVATORS.

(No Model.)

No. 561,232. Patented Ju'ne 2,1896.

\ 'H um@ y UNITED STATES PATENT GEEICE.

RICHARD E. LE Bacco, or NEw YORK, N. Y.

AUTOMATIC SAFETY ATTACHMENT FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 561,232, dated .Tune 2, 1896.

Application led May 24, 1895.

To all whom t may concern:

Be it known that I, RICHARD F. LE BROCQ, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Automatic Safety Attachments for Elevators; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to automatic safety attachments for elevators7 and has particular reference to self-closing hatchway-doors and means for automatically keeping the door opened when the elevator-car is on avlevel with the floor upon which the door is, and for closing the door when the elevatorl moves away from the lioor in either direction.

The invention will be particularly described with reference to the accompanying drawings, in whichl Figure l is a perspective View, partly in section, of the invention; Fig. 2, a perspective view showing the operation of the bolt and catch on the door, and Fig. 3 a sectional view of the door-closing apparatus.

A represents the elevator-car, and a a projecting cam or shoe on the elevator-car, so placed that when the car is on a level with the floor the cam will be directly opposite and resting against the bolt for holding the door open, as will be presently described;

D represents one iioor of the building, and l) a sliding door opening into the elevatorshaft. place, preferably at the rear thereof, is one end of a cord or chain c, the other end of which is attached to a revolving dr um c', mounted in a casing c2. When the drum c is revolved, chain c is Wound thereon, drawing the door b closed. A coiled spring c3 has one end attached to the drum c and the other end attached to the bearing c4 thereof, and normally expends sufficient force to revolve the drum c and cause the winding thereon of the chain c. Instead of using a spring c3, however, any suitable device may be utilized for rotating the drum. A sliding bolt CZ is mounted in bearings d d', fixed to the floor of the building opposite the elevator-shaft, and in such a position that one end will normally project into the elevator-shaft and impinge Attached to the door at any'suitable Serial No. 550,510. (No model.)

against the cam a when the latter is opposite the bolt. A suitable spring d2 normallyholds the bolt in position shown in Fig. 2z'. e. away from the door-and its end, which projects into the shaft,is provided with a friction-roller da, whichA bears against the cam when the latter is in position. Asuitable catch or pawl e is attached to the door and is so arranged that the latter may be opened at will; but when the catch has passed the end of the bolt CZ the former willv fall into the position shown in Fig. l, thereby holding the door open when the bolt is pressed in, as hereinafter described.

The operation of the invention is substantially as follows: The elevator-car being at a point other than opposite the door, spring CZ will hold the bolt away from the door, one end thereof projecting into the shaft. There then being nothing against which catch e can rest, chain c will be wound upon the drum c by the force of the spring c and the door will be held closed. When the elevator arrives opposite the doorway, the cam a strikes the friction-wheel d and pushes the bolt inward. The door is then opened by hand and catch e falls behind bolt d, holding the door open. As soon as the elevator passes up or down, spring d2 throws bolt d away from catch e and the door is closed by the doorclosing device above described-7l. e., by chain c being wound upon its drum by the force of spring c3. It is obvious that, although the device has been described with reference to a horizontally-slidin g elevator-door, it can be applied to avertically-sliding or to any swinging hatchway, door, or gate. Furthermore, the respective location of the various parts herein described may be varied without departing from the spirit of the invention.

Having now particularly described my invention, what I claim as new, and desire to secure by Letters Patent, is

In combination, the elevator having` the cam thereon, a horizontally-sliding door carrying a pawl pivoted thereto to have free movement in one direction, means for keeping the door closed normally and for returning it to closed position, a bolt arranged to slide in bearings on the door-frame independently of the pawl and transversely to the movement of the door, and a spring for forc- IOO ing the bolt away from JLhe door and out of the path of the pivoted pawl, said -bolt being in the path of the @am on Jche elevator whereby it will be moved toward the door upon the arrival of the elevator ready to eateh the pawl when the door is opened, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

RICHARD F. LE BROCQ.

Vtnesses:

JAMES I. NIEMANN, WILLARD S. BOONE.