US1162110A - Safety device for elevators. - Google Patents

Description

J. H. SCHWEBLE.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED APR. 16. 1915.

1 1 62,1 1 O. Patented Nov. 30, 1915.

a O i Z j 5 j Z fi a J (mm/away -i nesses I I I I, Inventor, Wt N 7 f? f 6 Z by W Attorneys JOHN HENRY scHw n B E, or trolvoran, NEVADA.

SAFETY'DEVVIC'E FOR ELEVATORS.

" Tonopah, in the county of Nye andState of Nevada, have invented a new and useful Safety Device for Elevators, of which the following is a specification.

The device forming the subject matter of this application is adapted to be employed upon an elevator of any desired sort, for the purpose of preventing the elevator from dropping an appreciable or damaging distance when the hoist rope breaks."

The invention aims to providenovel means for controlling the latches which limit the'downward movement of the, elevator, and to providenovel means wherebysuch latches may be'controlled by the action of the bail where\vi'ththe hoisting rope is assembled; I e

It is within the province of the disclosure to improve generally and'to enhance the utility of devices of that type to'which the present invention appertains.

Vith the above and other objects in view which willappear as the'description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention. i

In the accompanying drawing :Figure 1 shows the invention in longitudinal section; Fig. 2 is a longitudinal section, the cutting plane being passed at right angles to the cutting plane in Fig. 1; Fig. 3 is a cross section on the line 3-3 of Fig. 2.

The invention contemplates the use of a shaft 1 which may be variously fashioned without jeopardizing the utility of the invention. As shown, the shaft 1 comprises a wall 2 provided with upright guide ribs 3, an opposed wall 41, and rectangularly disposed end walls 5. The end walls 5 may carry at vertically spaced intervals, opposed projections or cleats 12, but one pair of which is shown in the drawings.

Mounted to reciprocate in the shaft 1 is an elevator 6 which may be of anv desired form. As shown, the elevator 6 is of bucketlike construction and embodies a side 7, an opposed side 8, and rectangularly disposed Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed April 16, 1915. Serial No. 21,913. 1 I

end walls 9. The walls 7 and 8 project below the bottom 10 of the elevator to form extensions 11 and the Walls 9 project below the bottom 10 to form extensions 30. That side .of the elevator 6 which is defined by the wall 7 slidesbetween the guide ribs 3 in engagement with the wall 2 of the shaft 1, the opposed side'8 of the elevator being slidable in contact with the wall 4 of the shaft 1. By means of the guide ribs 3, the elevator 6 is directed in its reciprocating movement, and'these ribs,-further, serve to spacethe end walls 9 of the elevator from the corresponding parts 5 of the shaft 1, for

a purpose which will be set forth herein-- after. A's a-jgeneral statement, however, it will be understood that sundry important elements to be mentioned hereinafter will-be found useful in connection with elevators and shafts differing from those above de scribed. 7

The depending extensions 11 of the elevator 6 carry horizontally spaced shafts'lat on which are mounted for swinging movement in parallel vertical planes, latchesl5, the latches being fulcrumed intermediate their ends on the shafts. The latches 15 are prevented from moving longitudinally of the respective shafts 1 1 by means of collars 16 or other devices adapted to a like end. With the upper ends ofthe latches 15, the inner or lower ends of flexible elements 17 are connected as shown at 18, the flexible elements 1? being carried laterally beneath the bottom 10 and being extended upwardly through openings 19 formed in the depending extensions 30 of the elevator 6. The flexible elements 17 are carried upwardly along the ends 9iof the elevator G and are secured as shown at 20 to enlarged feet 21 formed at the lower ends of a U-shaped bail 22 to which the hoisting rope or other flexible element 23 is connected. The feet 21 of the ball 22 are provided with elongated slots 24, receiving slidablv, guiding projections 25 on the elements 9 of the elevator 6. The swinging movement of the bail 22 in one direction may be limited by stops 26 on the elevator 6.

Fastening devices 27 are secured to the outer edges of the walls 9 of the elevator and to these fastening devices are attached the upper ends of downwardly extended. re-

tractile helical springs 28. The springs 28 are flexed inwardly at their lower ends across the lower ends of the extensions 30 of the elevator and are attached by means of fastening devices 29 to the latches 15 below the fulcrums 1st of the latches. i

It will now be understood that the guide ribs 3 coact with the elevator 6 to space the same apart from the walls 5 of the shaft 1, to the end that thebail 22, the springs 28' and the flexible elements 17 (at their upper ends) may not be interfered with by the shaft 1 when the elevator 6'is raised and lowered. I

WVhen the hoisting rope 23 is intact and when the weight of the elevator 6 is carried thereinto, the bail 22 will be pulled upwardly, the same sliding on the guiding projections 25. \/Vhen the bail 22 is thus uplifted, as occurs at all'times when the structure is in proper working condition, the flexible elements 17 are drawn upon and serve to tilt the latches 15 on their fulcrum shafts 14, so that the lower ends of the latches are swung inwardly, clear of the projecting cleats 12, as clearly shown in Fig. 2, the springs 28 being put under tension,

So long as the hoisting rope 23 is not broken, the latches 15 will remain in the 7 positions of Fig. 2and the elevator 6 may be raised and lowered readily. So soon, however, asthe rope 23 breaks, the bail 22 will move downwardly, slacking away the flexible elements 17. Tl1ereupon,the-springs 28 will react on the latches 15 and swing the lower ends of the latches 15 outwardly. The, latches15, under suchcircumstances will engage with the cleats 12 or their mechanical equivalents when the elevator 6 descends and therefore, the downward movement of the elevator will be stopped.

From the foregoing it will be obvious that when. the hoist rope 23 gives away, the lower ends ofthe latches 15 will be swung outwardly {and will coact with the shaft 1, to limit the dropping of the elevator, a falling of the elevator with attendant disastrous consequences being therefore avoided.

The structure herein disclosed is simple in form and comprises a minimum number of is claimed is 1. In a device of the class described, an elevator; a supporting member mounted to move along one side wall of the elevator; a latch pivoted to the elevator; a connection between the supporting member andthe latch and located along said side wall of the elevator; a spring forming a connection betweenthe latch and the elevator and located along said side wall ofthe elevator; a shaft comprising walls; and a guide rib carried by one of the walls of the shaft the guide rib coacting with the elevator to space said side wall of the elevator from the other wall of the shaft, thereby to define a passageway receiving the supporting member, the spring and the connection, when the elevator reciprocates. in

2. In a device of the class described, an elevator; latches fulcrumed intermediate their ends on the lower portion of the elevator;a bail embodying arms slidable longitudinally of the elevator; flexible elements securedat their upper ends to the arms and carried downwardly, longitudinally of the elevator, and laterally across the lower end of the elevator, the inner, lower ends of the flexible elements being secured to the upper ends of the latches; yieldable means for swinging the lowerends of the latches outwardly; and a pin and slot connection between the arms and the elevator, whereby the elevator may be supported by the bail independently of the flexible elements.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

JOHN HENRY SOHWEBLE.

Witnesses:

A. SANDERS, v I MARK R. AVERILL.

Gop'ies'of this patent may be obtained for five cents each, by addressing the Commissibnrof Patents,

Washington, D. C.

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