US1167702A - Safety device for elevators. - Google Patents

Description

A LEAL.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED MAR. 3. 1915.

Patented Jan. 11, 1916.

// g Q if}? 2/ 7 5 /9 0 4 w w g w 4 z 4 5 /E n /L E 5234; MM 6' N ,4 ll 7T If E 5 ANTONE LEAL, OF SELMA, GALIEQRNIA,

SAFETY DEVICE FOR-ELEVATORS.

Speeificationof LettersPatcnt.

Patented Jan. 11., 1916;,

Application filed lltlarch 3, 1915: SerialjNm 11 775,,

To, allflwiiomz't, may concern:

Be it, known, that: I, A TONE. LEAL, a citie.

Zen of the United States,residing at Selma,

in the county of Fresno andState of Cali fornia, have invented certain; new and useful Improvements in Safety .Devices. for

Elevators, ofwhich the following is av specification, reference being had to v the accompanying, drawings.

This invention relates to certain improvementsin safety devicesfor elevators; and

an object of the invention is to provide a. devlce of thlsgeneral character havlng novel. and improved means whereby the cagewi-ll.

be automatically. held against downward movement at substantially the-moment, the,

hoisting cableparts and whereby. the device is maintained inoperative under the influence of the draft tension.

The invention consists in the details. of construction and in thecombination and arrangement of the several parts of my improved safety device whereby certain important advantages 5 are attained; and the device is rendered simpler, less expensive and otherwise more convenient and advantageous for, use, all. aswwill be hereinafter mo-re v fully set forth.

The novel features of the invention will be carefully defined in the appended claim.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view, partly in elevation and partly in section, illustrating a safety device for elevators constructed in accordance with an embodiment of my invention; Fig. 2 is a view in elevation illustrating the mounting and operation of the cam or clutch members herein included, the pivots therefor being shown in section; Fig. 3 is a fragmentary view in elevation illustrating said clutch or cam members in operative engagement with the guides; and Fig. 4 is a view in perspective, detached, of a cam or clutch member herein included.

As disclosed in the accompanving drawings, the guides 1 are operatively engaged with the upright timbers 2 connected at the top of a cross timber 3. Coacting with the guides 1 are the shoes 4 secured to the vertically disposed standards 5 operatively engaged with the opposite sides of the cage A. The standards 5 project a predetermined distance above the cage A and are tied or connected at their, upperextremities. by; a crossbeam- 6 andthe upper-portions of said uprightsj are provided withthe elongated; longitudinally disposed openings 7 through, which are projected the reduced. extremities 8 of. the levers 9, said levers being provided intermediate their lengths with the upstanding cars 10 positioned between the depending ears carriedby the crossbeam 6 and pivotally supported thereby, through the medium of the pin 11. the levers 9 are reduced as indicated at; 1,2, and disposed within the lowerportion of the stirrup 14 straddling thecrossbeam 6, said cross. beam having; its opposite longitudinal portions reduced, as at 15, to serve; as. guides. for such stirrup Operatively, engaged with the upperextremity of the stirrup is; the-- hoisting cable 16. It is alsotobe observed that the stirrup ..14 is provided at a; predetermined dis! tance above the lower extremity thereofwith thepartitionor plate 17 which, upon downward movement being imparted to the stirrup independently of; the cross beam 6,,

will serve to cause upward movement of the outer or reduced. extremities: 8 offlthe lever-s 9, for a purpose which will hereinafter be more particularly referred to. The clownward independent movement of the stirrup 14 is adapted to be automatically accomplished upon parting of the hoisting cable 16 and, as herein disclosed, this movement is accomplished through the medium of the retractable member 18, herein disclosed as a conventional coil spring, one extremity whereof being secured to the lower portion of the stirrup while the opposite extremity thereof is suitably anchored to the top of the cage A.

The upper extremity of each of the uprights 5 is provided with the oppositely disposed lateral extensions 19 to which are pivotally secured the cams or clutch members 20 having their engaging surfaces toothed as at 21 to coact with the toothed side faces 22 of the guides 1 when upward movement is imparted thereto. Projecting inwardly from the engaging surfaces of the cams or clutch members 20 at the top thereof are the arms or fingers 23 adapted to overlie the reduced extremities 8 of the levers 9 so that upon downward movement being imparted to the stirrup 14 under the infiuence of the retractable member 18 the cam or clutch members 20 will be elevated and The rear extremities. of

-' the pivot pin 26 disposed through an extension 19 and through an upper extremity of a link 27, the opposite extremity of which being secured to an adjacent shoe 4, and in pratice I find it of advantage to have said pivot pin surrounded by the bearing sleeve 28, for a purpose which is believed to be self-evident.

From the foregoing description, it is thought to be obvious that a safety device constructed in accordance with my invention is of an extremely simple and comparatively inexpensive nature and is particularly well adapted for use by reason of the convenience and facility with which it may be assembled, and it will also be obvious that my invention is susceptible of some change and modification without material departure from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice.

I claim:

In combination with guide-ways, a cage mounted for movement longitudinally of the guide-ways. uprights carried by the cage and projecting thereabove, a cross beam connecting said uprights, extensions projecting in opposite directions from the upper portions of each of the uprights, clutch members pivotally engaged with the extensions and adapted to coact with the guides, each of said clutch members being provided with an inwardly disposed extension, levers pivotally supported intermediate their lengths by the cross beam and having their outer extremities underlying the extensions of the clutch members, outwardly disposed lugs carried by the extensions of the uprights overlying the clutch members and serving to limit the upward movement of said clutch members, a stirrup straddling the cross beam and underlying the inner extremities of the levers, an expansible member interposed between the stirrup and the cage, and a hoisting member secured to the stirrup, the engaging surfaces of the clutch members being toothed and the coacting surfaces of the guides being also toothed.

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

ANTONE LEAL. WVitnesses:

CHESTER E. SHEPARD, E. E. SHEPARD.

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

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