US1013232A - Safety elevator device. - Google Patents

Description

P. STINE. SAFETY ELEVATOR DEVICE. APPLIOATION FILED JULY 8, 1911.

1,013,232. Patented Jan.v2, 1912.

WITNESSEL? IN VENTOR.

W WATTORNEB,

COLUMBIA PLANOGRAPH co..wAsH|NGTON. n. c.

PETER STINE, 0F CONGO, OHIO.

SAFETY ELEVATOR DEVICE.

Specification of Letters Patent.

Patented Jan. 2, 1912.

Application filed July 8, 1911. Serial No. 637,570.

To all whom it may concern:

Be it known that 1, PETER STINE, a citizen of the United States of America, residing at Congo, in the county of Perry and State of Ohio, have invented certain new and useful Improvements in Safety Elevator Devices, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to safety elevator devices, and the primary object of my invention is the provision of positive and reliable means, in a manner as will be hereinafter set forth, for preventing the sudden descent of an elevator cage when the hoisting cable thereof breaks, or the structural elements connecting said cable to the cage.

A further object of my invention is to furnish an elevator cage and shaft, with a device of the above type that is positive in its action, not liable to injury from ordinary use, and highly eflicient as a safety device.

With the above and other objects in view, the invention resides in the novel construction, combination, and arrangement of parts to be hereinafter specifically described and then claimed.

Reference will now be had to the draw.- ings, wherein Figure 1 is a side elevation of the central frame of an elevator cage partly broken away and partly in section; and Fig. 2 is a plan of the same.

The reference numerals 1 denote vertical, oppositely disposed racks adapted to be arranged in an elevator shaft, and extend from the lower end thereof to the upper end, said racks having teeth 2 presenting horizontal shoulders or ledges 3.

The reference numeral 4 denotes a hoisting cable having the lower end thereof fixed in a socket 5 carried by a cross-head 6. Any suitable fastening means can be employed for anchoring the lower. end of the hoisting cable in the socket 5; for instance, rivet 7 and solder 8. The cross-head 6, at a point directly beneath the socket 5, has an eye 9 connected by a chain 10 to an eye-bolt 11, said eye-bolt being arranged in the top channel bar 12 of a central frame of an elevator cage. The top channel bar 12 is connected by vertical channel bars 13 to a bottom channel bar 14, and all of said bars are braced by corner pieces 15.

The ends of the top channel bar 12 are provided with openings 16 and arranged transversely of the ends of said bar are pivot pins 17 said pins being arranged above the openings 16 with the ends thereof extending into the side flanges 18 of the bar 12. Pivotally mounted upon the pins 17 are compound curved arms 19, having the upper ends thereof bent inwardly and provided with eyes 20 which are loosely connected by links 21 to eyes 22 at the ends of the cross head 6. The lower ends of the arms 19 are bent outwardly, and the inner sides of said arms are provided with sockets 23. EX- tending into these sockets are outer convolutions of coiled compression springs 24, said springs having the inner convolutions thereof mounted in sockets 25 secured to the corner pieces 15, it being, preferable to provide both sides of the central frame with these corner pieces.

As shown in Fig. 1, the hoisting cable 4 has been released and the outer ends of the arms are protruding through openings 26 provided therefor in the bars 13 and resting on the shoulders or ledges 3 of the racks 1. Under ordinary operating conditions, the cable 4 maintains the cross-head 6 in an elevated position relatively to the bar 12 and the chain 10 taut. With the crosshead 6 in an elevated position the lower ends of the arms 19 are retracted and the springs 24 under compression, but immediately u on the cable 4 breaking or becoming acci entally detached from the cross-head 6, the compression springs 24 force outwardly upon the lower ends of the arms, placing the outer ends of the arms in engagement with the racks, and thereby preventing the rapid descent of the elevator cage within the shaft.

The sockets 23 and 25 prevent accidental displacement of the compression springs, and these springs will be housed within the roof of a car or cage built around and supported by the central frame.

What I claim is In a safety elevator device, the combination with a pair of oppositely disposed vertical racks having teeth, and a hoisting cable, of a central cage frame including channel bars connected together by corner pieces, a crosshead secured to the lower end of said hoisting cable, a slack chain attached at its upper end to the center of said crosshead and its lower end connected to the upper channel bar of said frame centrally thereof, pivot pins mounted in the ends of the upper of said channel bars, curved arms loosely mounted upon said pins having their lower ends extending into the side channel bars of said frame, said arms extending over the upper channel bar to a position below the crosshead, links for loosely connecting the upper ends of said arms to the ends of the crosshead, said arms further having their lower ends extending out through the side channel bars of the frames and capable of engaging the teeth of the racks to arrest the descent of said frame, sockets provided on the inner side of the lower portion of each of said arms, sockets interposed between the corner-pieces at the upper ends \of said frames, said arms being normally maintained in an inoperative position when the hoisting cable is taut, and coiled springs interposed between the sockets of the arms and the sockets of the corner pieces for forcing said arms to engage the teeth of the racks when the crosshead is released, due to a slacking or breaking of said hoisting cable.

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

PETER STINE. l/Vitnesses:

W. F. RICHARDS, JOHN W. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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