US1604613A - Safety appliance for elevators - Google Patents

Description

r out 26 1926 d ff ill

Patented Oct. 26, 1926.

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ABRAHAM STOLLER, OF NEW YORK, N. Y.

SAFETY APPLANCE LEVATORS.

Application filed June 20,

The object of my invention is to supplement elevator safety mechanism of the automatic type well known in the art by auxiliary appliances within the control of a person in the car, so as `to preclude the possibility of accident in case of the failure, in whoie or in part, of said usual automatic means, under which conditions, as heretofore prevalent, the elevator would not only be endangered but rendered inoperative in so far as the occupants of the car were concerned.

Hence I provide suitable means adapted to be manually controlled within the car, and auxiliary to the usual extraneous automatic safety means, whereby, in case of emergency, the car may be effectually controlled through the medium of an auxiliary brake mechanism adapted to act in conjunction with the governor rope of the or dinary safety mechanism, and whereas also the power may be shut oft or applied according to circumstances and requirements,l all as hereinafter fully set forth,-the invention consisting essentially in the specific combination and arrangement of devices and appurtenances described and claimed whereby these and other advantageous results are attained, and distinctive features being the control of an auxiliary brake device but duplex emergency means, one electrical and the other mechanical, whereby the setting of the auxiliary brake also cuts out the motor, which is subject to control and reinstatement by an independent electrical circuit, so that practically, to all intents and purposes, the car is self-contained in this respect, and may be safe-guarded and maniplated independent of the usual automatic governor-controlled mechanism.

In the accompanying drawings I illustrate more or less diagrammatically the practical embodiment of the essential features of my invention, although I do not wish to restrict myself to the identical form and construction of device, parts and appurtenances shown by way of exemplification, since modifications may be made in minor details, and equivalent mechanical expedients resorted to with like results, and without departing from the spirit and intent of my invention in this respect.

With this understanding Fig. l, represents an elevator car and well known automatic governor-control mechanism used in conjunction therewith, the

brakes;

1924. Serial No. 721,151.

car being also provided with my auxiliary safety control means;

Fig. 2, is aview of the underside of the car, showing one of the usual guard rail Fig. 3, is a view of the casing of the auxiliary brake, broken away in part to show said brake device in detail, in elevation;

Fig. 4, is a horizontal sectional elevation taken upon plane of line 4--1 Fig. 3.

The car C, is supportedand raised and lowered normally by any suitable or well lino-wn means, not shown, the same forming no part of my invention. R, R, are the usual flange guide rails; G, the usual governor rope vconnected above with the customary governor-control mechanism G1, and below with the usual weighted sheave G2. g, is the tension rope connecting the governor rope G, with the usual guide rail blocks g, g, underneath the car in a manner well 1nnown in the prior state of the art, as illustrated in Fig. 2.

B, is my auxiliary brake arranged to engage, upon occasion, with a strand of the governor rope G, which extends through the casing K, in which the brake B, is pivotally mounted, said casing K, being formed with a semi-circular bearing groove lo, for the accommodation of the governor rope G, as will be understood by reference more particularly to Figs. 3 and 4, of the drawings. The brake B, is held normallyv from contact with the rope G, by a retractile spring 7a as shown particularly in Fig. 3, of the drawings; and the brake-actuating cam or eccentric E, is held normally out of contact with the brake B, by a spring e, interposed between a shoul! der e on the eccentric rod e2, and a fixed part k2. of the casing K, as indicated in Fig. 3.

The eccentric rod e2, extends through a solenoid S, said rod being provided with or formed to function as the core of said solenoid S, and the extension of said rod e?, below the solenoid S. being formed with a cam protuberance e3, for contractual engage ment with a switch a, adapted to open the electrical circuit af, a', when the brake-actuating rod e2, is depressedsaidelectrical circuit a, a. controlling the motor power 'circuit as indicated diagramatically in the lower part of Fig. l, of the drawings.

The auxiliary brake B, may also be actuated through the medium of a handle e, connected by a flexible cord or equivalent e5, with the aforesaid rod e2, as indicated in Fig. 1,013 the drawings, so that alternative means are thus provided for applying` the emergency brake B, and opening the power circuit.

In order to positively etliect the re-olosing of the motor power circuit upon the release of the auxiliary brake B, I provide an auX- iliary electrical circuit a2, a2, c-losable upon occasion by a press button a, whereby the parts and connections may be restored to normal relationship.

In use in emergency the auxiliary brake B, may be applied by either pressing the button s', thereby closing the circuit s, s, of the solenoid S, and actuating the rod e2, or the same result may be attained by means of the handle e4, should the solenoid S, fail to function for any reason.

Heretofore in case of accident or impairment of the governor-control mechanism, the occupants of the car have been comparatively helpless, having to rely on extraneous assistance, whereas by my invention the car can be manipulated etliectually from within in case of necessity. Furthermore, my safety mechanism and appurtenances may be tested out from time to Vtime with` out injury, and withoutthe necessity for dismantling of the car or parts involved,-a result not heretofore attained in safety appliances for elevators of the character designated.

l/Vhat I claim as my invention and desire to secure by Letters Patent, is

l. In combination with an elevator of the character designated, an auxiliary brake po` sitioned on Vthe car, and adapted to engage with a strand of the governor rope, together with means for actuating said auxiliary brake electro-magnetically, and means connected with said auxiliary bralrefor opening` the motorpower circuit, substantially in the manner and for the purpose set forth.

2. In combination with an elevator oi' the character designated,l anauxiliary brake positioned on the car and adapted to engage with a strand of the governor rope, means for actuating said auxiliary brake electromaninetically` means 'connected with said auxiliary brake for opening the motor power circuit, and independent electrical means for closing said motor power circuit, substantially in the manner and for lt-he'purpose set forth. i

ABRAHAM sroLLER.

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