US870084A - Safety appliance for elevators. - Google Patents

Description

No. 070,004. PATBNTED N07. 5, 1007.

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SAFETY APPLIANCE FOR ELEVATORS. APPLIoATIoN FILED M1029. 1007.

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J, COLEMAN. SAFETY APPLIANGB FOR BLEVATURS.

APPLIGAT'IQN FILED JAN: 29. 1907.

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JESSE COLEMAN, OF SHELBURN, INDIANA.

SAFETY APPLIANCE FOR ELEVATORS.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Applicationiflled January 29. 19071 Serial No. 354,642.

To all whom it may concern:

Be it known that I, .IEssn COLEMAN, a citizen of the United States, residing at Shelburn, in the county oi Sullivan, State of Indiana, have invented certain new and useful Improvements in Safety Appliances for Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to elevators or lifts generally, and particularly to such as are employed in the shafts of mines and for freight-hoisting purposes.

It is the special purpose of the invention to provide an improvement in the stop or locking means to prevent the cage or carrier from falling or descending in Case the hoisting cable should break or otherwise fail.

The nature of the invention is to be ascertained from the means illustrated in the annexed drawings, forming a part oi this specification, in view of which it will rst be described with respect to its construction and mode of operation and then be pointed out in the subjoined claims.

Of the said drawings- Figure lis a vertical sectional view of the elevator or lift embodying my improvements showing the safety hooks as held out of engagement with the horizontal bars at the sides of the elevator shaft. Fig. 2 is a horizontal sectional view taken in the plane 2 2, Fig. l. Fig. 3 is a view similar to Fig. l, but showing the safety hooks as released and in engagement with the horizontal bars of the elevator shaft.' Fig. 4 is a detached view of one of the safety hooks.

Similar numerals of reference designate similar parts or features, as the cas'e may be, wherever they occur.

In the drawings, A designates the elevator cage or carrier provided with beams or cross-plates ll at its top; and l2 designates guide-bars at opposite sides of the elevator shaft or well, the sides of which guide-bars are engaged on opposite sides by the inwardly extended portion 13 of angle irons, secured to the outer sides of theelevator to guide and steady its vertical Inovements. Extending laterally of the sides oi the cage or carrier are spaced bars 14 which practically form the sides of the elevator shaft.

l5 designates the hoisting cable or rope fastened at one end to the windlass operated by the engine, and at the other end to the rod or bar I6 extending between the plates ll, through the medium of strong springs 17 and 1S which prevent sudden jar or jerk upon the starting of the car.

19 designates the safety-hooks the shanks of which are centrally pivoted on the outside of each plate ll near its ends. The upper arms of the hooks are connected with the ends of chains 20, which latter are centrally connected with the hoisting cable l5 at a point where the latter is connected to the springs 17, said chains'serving to normally hold the hooks 19 out of engagement with the bars 14 of the elevator shaft. The lower projecting ends or arms of the hooks I9 are provided with eyes in which the ends of helical springs 2l are connected so as to operate with a tendency to draw the lower ends or arms of the hooks toward cach other. The hooks at their upper ends are adapted when released to engage the side bars 14 of thel elevator shaft so as to hold the cage against downward movement.

rlhe means just described are provided for the purpose of preventing the fall of the cage in case the hoisting rope or cable should break or otherwise fail in which case the chains 20 will be relaxed permitting the spring 2l to draw inward on the lower arms of the hooks and allow the latter to fly outward and engage the side bars 14 of the elevator shaft.

22 designates the floor of the cage supported on cross bars 23 at the ends of which are braces 24 to maintain it in position.

25 are angle-irons below the cross bars 23 to stifen and keep the cage in position so as not to bind on the guide bar.

It is understood that there are four hooks 19 employed, one on the outer side of each end portion of each plate or beam ll and that there are chains 2() connected with the hooks and with the lifting rope as hereinbefore described. In the case of breakage orfailure ofthe hoisting cable l5 the springs 17 and I8 will assist instantly in pulling down said relaxed cable so as to quickly relax tension on the chains 2O and allow the released hooks I9 to engage the bars 14.

Instead of applying the means described to a vertically operating cage, it may be employed on a car running on an incline into a mine for raising coal or ore, or for carrying the men from the bottom of the mines to the mouth of the shaft or drift.

The means described are quite simple in construction but at the same time most eicient in use and operation.

What is claimed is:

An elevator cage comprising overhead bars, hooks having Shanks centrally pivoted on the ends of the bars and adapted to be operated to engage means on the sides of the elevator-shaft to hold the elevator-cage against dropupon the failure of the hoisting cable and the slacking of 10 ping, a hoisting cable, chains connected at their outer ends the said chains.

with the upper arms of the Shanks of the hooks and cen- In testimony whereof, I alix my signature, in presence trally connected with the lower end o'f the cable to hold of two witnesses.

the hooks normally out of engagement with the said means on the sides of the elevator shaft, springs connecting the JESSE COLEMAN' lower` end of the cable with said bars, and springs en- Witnesses: gaged at their ends with the lower arms of the hooks, and F. J. HARTIN,

operating' with a tendency to throw said hooks into action R. B. COLEMAN.

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