US1145250A - Elevator safety device. - Google Patents

Description

APPLILATIOH FILED FEB. 10, I915.

Patented July 6, 1915; 2 SHEETSSHEETI .m w M n 3 3 M4%% 1 a 2 mm bar v 6H1, 7 J J m m .1 m nm 0 5 1 3 n5 5 v. H 2r v fl b H Z M k v m H E Mame/w a Hot "at; I

E. MATAVA.

ELEVATOR SAFETY DEVICE. APPLICATION FILED FEB. I0, 2915.

v Patented July 6, 1915.

2 SHEETS-SHEET 2.

JJJ I i6 lMwkimw ill EDWARD MATAVA, 0F DUDLEY, PENNSYLVANIA.

ELEVATOR SAFETY DEVICE.

Specification of Letters rate at.

Patented July 6, 1915.

Application med February 10, 1915. Serial No. 7,334.

T 0 all whom it may concern Be it known that I, Enwmn MATAVA, a citizen of the United States, residing at Dudley, in the county of Huntingdon and State of Pennsylvania, have invented certain new and useful Improvements in Elevator Safety Devices, of which the following is a specification.

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

An object of the present invention is to provide a safety attachment for elevators including cooperating mechanism carried by the elevator car and the guide rails adapted to arrest movement of the car and to hold the same elevated should the suspending or hoisting cable become broken or otherwise damaged.

A further object of the invention is to provide an elevator with a .safety device I which is made operable when the suspending cable becomes broken and to furtherv provide the same with additional safety means manually controlled, which will lock the elevator in any desired position and prevent the descent of the same.

With the above general objects in view and others that will appear as the nature of the invention is better understood. the same consists in the novel construction. combination and arrangement of parts to be hereinafter more fully described and then claimed.

In the accompanying drawings which show the preferred embodiment of the present invention and to which reference is had herein by like characters designating corresponding parts throughout the several views :Figure 1 is a side elevational view of an elevator car and portion of the guide rails and partly in section illustrating my safety attachment mounted thereon and in inoperative position. Fig. 2 is a similar view showing the locking mechanism in operative position. Fig. 3 is an edge elevational view. with a portion of the car frame broken away. Fig. 4 is a horizontal sectional view taken on line IV-IV of'Fig. 1. Fig. 5 is an enlarged detail perspective view of the spring-controlled trip block for releasing the sliding bolt. and. Fig. 6 is an enlarged detail perspective view of the looking bolt.

Briefly described, the resent invention aims to provide a safety attachment for elevators that IS made operative when the suspending cable for the elevator becomes broken. and to further provide a safety at-' nel iron and extend from the top to bottom of the elevator shaft and constitute guides for the elevator car 11. The portion of the locking mechanism to arrest movement of the car 11 carried by the guide rails 10 includes arms 12 pivoted as at 13 between the flanges of the guide rails 10, the arms being limited in their outward movement by stop pins 13. while the upper ends of the arms 12 are beveled as at 14. In order to hold the beveled upper ends of the arms 12 projected from the guide rails 10, as indicated in Figs. 1 and 2, I provide springs 15 fastened at one end to the said arms while the other end freely engages the rail 10 for purposes of projecting the same. These arms 12 are shown as pivoted in one of the guide rails. while the locking mechanism shown on the car moves a locking bolt to engage such arms. but I do not wish to confine myself to such construction, as both guide rails 10 may be rovided with these arms and engaged by similar locking means.

The car 11 consists of an upper and lower cross head 16 and 17 respectively, while the bottom of the car is designated 18. The ends of the cross heads 16 and 17 are bifurcatedto provide projecting fin ers 19 that inclose the guide rails 10 an constitute guides for the car. A transverse bar 20 is carried by the lower cross head 17 and has secured thereto a pair of spring members 21- and 22 constituting buffers for the bottom end of the car while the spring member 22 also cooperates with the spring-pressed arms 12 in a manner to be stated. The spring members 21 and 22 are connected in any suitable manner to the bar 20, while the free upper end 23 of the spring 22 is seated within a cut-away portion or recess 24: pro vided in the bottom face of the cross head 17. The spring 22 has a normal tendency to be distended laterally as shown in Fig. 1, to engage the spring-pressed arms 12 to force the same into retracted position within the side flanges ot' the guide rails 10 to permit the elevator car 11 to descend in the usual manner. An operating lever 25 for the spring 22 is pivoted as at 26 within the floor 18 of the car and has the portion thereof extending below the pivot point passing through an opening 27 provided in the lower cross head 17, with the lower end of the rod 25 disposed Within an opening 28 provided in the end 23 of the spring so that the same may be retracted to the position shown in Fig. 2 and held in such position by the pin 29 passing through registering openings provided in the upper end of the arm 25 and the side walls 30 of the housing 31 for the lever. In this position, the spring-pressed arms 12 are permitted to be projected with the upper beveled ends 14 disposed in the path of movement of the adjacent end of the cross head 17, and these arms are adapted to engage the cross head to arrest descending movement of the car 11 should the main safety mechanism fail to operate.

The main safety mechanism operating in connection with the spring-pressed arm 12 and the suspending cable 32 for the car 11 consists of a block 34 carried by the upper cross head 16 and having a housing 35 adapted for inclosing the sliding bolt 36 spring-pressed as at 37 and having a recess 38 cut in the projecting end thereof. The upper wall of the housing 35 carries a pair ofarms39 in which is pivoted a locking lever 40 having the forward end 41 received in the notch 38 to hold the same in retracted position, as shown in Fig. 1, against the ten sion of the spring 37. The block 34 carries four upright corner posts 42 having a head 43 on the upper ends thereof, which head is centrally apertured as at 44- for the passage of the suspending cable 32, whilethe head is provided with a pair of spaced openings 45 to provide a passage for the upstanding posts 46 carried by the weighted block 47. The block 47 is provided with radial projections 48 adapted to project through the spaces provided by the corner posts 42, as shown in Fig. 4, to constitute a guide for the weighted block 47. An eye 49 is carried centrally by the block 47 and.

is connected to the lowerend of the suspending cable 32, thisbloek being normally held in elevated position as shown in Fig. 1. against the tension of compression coil springs 50 that surround the posts 46, and

menace out of contact with the rear end 51 of the locking lever 40.

The operation will be described as fol lows: In the normal operation of-the car, the lever 25 is held in the position shown'in Fig. 1 by thespring 22, which spring engages the upper ends of the 'springressed arms 12 to project the same within t e side flanges of the guide rails 10 to provide a clearance for the car 11 in its descending movement. Should it be desired for any reason, to hold and lock the car in suspended position, the lever 25 is moved on its pivot 26 within the housing 31 and locked in such position by the pin 29 to thereby retract the spring 22 and permit the upper beveled ends 14 of the arms 12 to engage the bottom cross head 17 of the car.

In thenormal operation of the car, as-

suming that the lever 25 is in the position .i

shown in Fig. 1, should the cable 32 become broken, the springs 50 will force the weighted block 47 downwardly and into engagement with the rear end 51 of the locking lever 49 thus releasing the forward end 11 of said locking lever from the recess 38 in the sliding block 36 and allowing the spring 37 to project the block 36 into operative locking engagement with the locking arms 12 as indicated in Fig. 2.

While I have shown and described the preferred embodiment of the present invention, 1 do not wish to confine myseli to the exact details of construction shown, as various forms, modifications and arrangements of the parts as shown may be had without departing from the spirit and scope of the invention as claimed.

What I claim as new is 1. In a device of the class described, the

combination with an elevator guide rail and spring-pressed arms carried thereby, of an elevator car, a spring-pressed bolt carried by said car, a pivoted arm engaging said bolt to hold the same in retracted position against the tension of the spring, a suspending cable for the car, a weighted block carried by the lower end of said cable and associated with said car, said blocl: adapted to be lowered when the cable breaks to engage said pivoted lever to remove the same from operative connection with the spring-pressed bolt to allow the said bolt to engage the spring-pressed arm.

2. A device of the class described, comprising in combination with an elevator guide rail carrying spring-pressed arms, an elevator car carrying locking mechanism cooperating with said spring-pressed arms,

said locking mechanism including a normally-retracted spring-pressed bolt, a pivoted lever having one end engaging said bolt to hold the same retracted, a name carried by the upper end of said car, a weighted block, guide posts carried by said block eze amaeeo tending through said frame, compression coil springs surrounding said posts, a, suspending cable for the car connected to'said weighted block, said block ada tedwhen the suspending. cable breaks to be ibwered toengaging position with the other end of. said lever to remove the aforesaid end from engagement with said'locking bolt to permit the same to be projected into. locking engagement with the spring-pressed arms.

In-Eestimon whereof I aflix my signature inpresenc'e 0 two witnesses.

A EDWARD MATAVA. Witnesses:

J. A. GOULD, GEORGE S. GOULD.

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