US1129536A

US1129536A - Safety device for elevators.

Info

Publication number: US1129536A
Application number: US83676114A
Authority: US
Inventors: Andrew Barash
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-05-06
Filing date: 1914-05-06
Publication date: 1915-02-23
Anticipated expiration: 1932-02-23

Description

A. BARASH.

SAFETY DEVICE FOB. ELEVATORS. APPLICATION FILED MAY 6, 1914.

1,129,536. Patented'Feb. 23, 1915.

2 SHEETSSHEET 1.

"'HE NOkRls PETERS 60., PHOTO-LITHO., WASHINGTON. D4 C.

A. BARASH.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED 1mm, 1914,

1,129,53fi. Patented Feb. 23, 1915.

2 SHEETSSHBET Z,

THE NORRIS PETERS CO., PHOm-LITHQ, WASHING TON, D. C

ANDREW BALRASH, 0F GLOUSTER, OHIO.

SAFETY DEVICE FOR ELEVATORS.

Specification of Letters Patent.

Patented Feb. 23, 1915.

Application filed May 6, 1914. Serial No. 836,761.

To all whom it may concern Be it known that I, ANDREW BAnAsH, a subject of the King of Hungary, resi ding at Glouster, in the county of Athens and State of Ohio, have invented certain new and useful Improvements in Safety Dev ces for Elevators, of which the following is a specification.

This invention relates to certain new and useful improvements in safety devices for elevators.

The primary object of this invention is to provide an elevator attachment for automatically supporting the car in the event of the accidental breaking of the hoisting cable.

A further object is to provide an automatic shaft-engaging means upon an elevator car and whereby the carwill be supported within the shaft upon the breaking of the hoisting cable, thus preventing the car from dropping and avoiding accidents to the contents of the car.

A still further object is to provide a means upon an elevator car adapted for automatically engaging opposite racks within the shaft in the event of a breaking of the hoisting cable and such means being manually releasable from the interior of the car for effecting a release from the rack and allowing the car to descend a desirable distance to a floor landing door.

With these general objects in view and others that will appear as the nature of the invention is better understood, the same consists in the novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the appended claims.

In the drawings forming a part of this application and wherein like numerals of reference designate corresponding parts throughout the several views :-Figure 1 is a vertical transverse sectional view taken through an elevator car, the opposite vertical beams and racks of the elevator shaft be; ing shown in side elevation. Fig. 2 is a similar view of a portion of the same illustrating the locking elements as positioned when the cable is broken. Fig. 3 is a top plan view of the structure shown in Fig. 2. and, Fig. 4 is a perspective view of one of the locking bolts detached.

Referring more in detail to the drawings, the opposite beams 10 are illustrated to represent vertically positioned beams upon opposite sides within an elevator shaft and provided on their inner faces with toothed racks 11. The elevator car 12 being positioned for vertical movement within the elevator shaft is provided with channel brackets 18 spanning the racks 11 and adapted for guiding the car in its vertical movement within the shaft. Strap brackets 14 are positioned upon the top of the car at theopposite sides thereof and each is provided with a slidably engaging bolt 15 therein and adapted for a sliding movement transversely of the car and in alinement with the racks 11 and whereby the inclined outer tooth 16 of each of said bolts is adapted to engage a tooth of the adjacent rack when said bolts are projected outwardly. Guide plates 17 for said bolts are positioned inwardly of the strap brackets 14 and are provided with central rectangular perforations 18 adapted for the sliding reception of the inwardly-projecting arms 19 of the bolts, which arms are rectangular in cross-section. The plates are also provided with circular perforations 20 upon opposite sides of the perforation 18 and through which perforations 20 are adapted to slide the inwardly-projecting pins 21 carried by the bolts '15 upon opposite sides of the arms 19. Helical expansion springs '22 are positioned surrounding the pins 21 and between the bolts and the outer faces of the guide plates 17. and whereby the bolts are normally outwardly influenced for engaging the bolts with the rack teeth.

The hoisting cable 28 for the elevator car is connected to the inner ends of the bolt arms 19 by means of cords 24 which pass over pulleys 25 mounted upon a bracket 26 substantially centrally-positioned upon the top of the car and mid-way between the guide plates,17. By this arrangement, it is designed to support the car by means of the cable 23 and while the car is so supported, the weight thereof is suspended upon the cords 24, thereby drawing inwardly the bolts against the force of the springs 22 and placing the springs under extreme tension at all times during the operation of the car.

It will be evident that with the elements thus described positioned as illustrated in Fig. 1, that a severing of the cable 23 results in releasing the cords 24: and allowing the action of the springs 22 to project the bolts 15 for automatic engagement with the teeth of the racks 11 as illustrated in Fig. 2. A central opening 27 is provided in the roof 28 of the car and through which two tachment as the cable cords 24 while said cords 29 pass over rollers 30 mounted in the bracket 26. An angular lever 31 is pivoted within the car to the roof thereof upon a bracket 32 and has the lower ends of the two cords 29 which project through the roof opening 27 secured to the terminal perforation 33 of said lever while the opposite end of said lever is provided with an operating handle 34.

The automatic operation of the engagement of the car bolts with the shaft racks for supporting the car when the hoisting cable is broken has already been fully described.

The elements are positioned as illustrated in Fig. 2, whenever the supporting cable is accidentally broken and this occurrence may happen at any point of travel of the car, such as at points between floor landings. When so positioned, access to the interior of the car is extremely difficult and it is often desired to shift the car to a position opposite the door of one of the floor landings for the purpose of allowing the passengers or freight to leave the car. This may be readily accomplished by shifting the lever '31 by grasping the handle 34, exerting a pulling force upon the cords 29 and thereby drawing the bolts 15 inwardly out of engagement with the rack teeth while as will be evident, when the handle is released, the springs 22 again automatically engage the bolts with the shaft racks.

While the form of the invention herein shown and described is what is believed to be a preferred embodiment thereof, it is nevertheless to be understood that various forms and modifications may be resorted to which fall within the spirit and scope of the invention as claimed.

What I claim as new is 1. In combination with an elevator shaft having oppositely-positioned toothed racks and a car vertically movable therebetween, of oppositely-positioned strap brackets upon the roof of said car, outwardly projectable bolts slidably-mounted within said brackets, guide plates positioned inwardly of said brackets and each provided with a rectangu lar central perforation and oppositely-positioned circular perforations, said bolts provided with a central inwardly-extending arm and with oppositely-positioned inwardly-projecting pins adapted for sliding reception within the perforations of said plates of corresponding dimensions, expansion springs surrounding said pins and engaging between said plates and bolts, a bracket centrally-positioned upon the roof of the car, rollers mounted in said brackets, a hoisting cable, cords secured be.- tween the lower end of said cable and the inner ends of said bolt arms, a pivoted lever within said car provided with an operating handle, the roof of said car provided with a central opening therethrough beneath the said bracket, and connecting cords extending through said roof opening and secured between the inner end of said lever and the inner ends of said bolt arms.

2. A device of the class described comprising vertically-positioned elevator shaft beams, inwardly projecting oppositely-positioned toothed racks upon said beams, a car between said racks having av central opening in the roof thereof, a bracket mounted upon the roof of said car over the said opening, two upper and two lower pulleys journaled in said bracket, oppositelypositioned bolts slidably-mounted upon the roof of said car in engaging alinement with said racks, expansion springs engaging said bolts, a hoisting cable, cords connected between said cable and passing over the upper ones of said rollers and connected to said bolts with said springs under compression and said bolts disengaged from said racks during the operation of the car, an operating lever within the car, and connecting cords extending through said roof opening and over the lower one of said rollers and connected between one end of said lever and said bolts.

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

ANDREW BARASH.

Witnesses:

J OHN Koorns, Jon MOKNAR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner ot'ratents.

Washington, I). C.