US339032A - Safety lock or catch for shafts or elevators - Google Patents

Description

Y(Mo Model.)

- SAFETY Loox 0R GATGH PoR No. 339,032.

C. C. THOMAS.

sHAPTs 0R ELEvAToRs.

Patented Mar. 30, 1886.

WITNESSES I JV VEN TOR .dttorney listino ldl'rnr CASH G. Vi"

Erice.

SAFETY LOGK @il GATi-i FR SHF''S @R ELEVATORS.

SPECIFXCATION forming part of Letters Patent No. $159,032, dated March 30, 1886.

Application filed January 13, IESB. Serial No. 138,409. (No model.)

.To all wiz/0m, it iii/ay concern:

Be it known I, Unset G. THOMAS, citizen of the United. States, residing at Evans ville, in the county oi' Vnnderhnrg, Indiana, have invented certain new anc ful Improvements in Safety Locks or Catches for Shafts or Elevators, or which the following is a speciiieation, refe.. nce being had therein to the accompanying drawings.

This invention relates to improvements in elevators, and has for its oliglect to provide a strong, simple, dnrahle automatic attach ment/to elevators, whereby the descent of the platform, in consequence of any break in the hoisting npparatnsmill he instantly arrested, and thereby to the safety of this class of 'machinery hy preventing the loss of life which frequently occurs when the hoisting-rope of an elevator breaks. This object is attained by the mechanism. illustrated inthe accompanying drawings, forming a part of this specilication, in whichm Figure l is an elevation oan elevator provid ed with this attachment. Fig. 2 is a sectional view online w x of Fig. l. Fig. 3 is a scctional plan on line w of Fig. il; Fig. 4, a detached sectional view on line y y of Fig. 3'

enlarged. Fig. 5 is a detached enlarged plan of one of the locking devices.

The letter A indicates the freine ofthe elevater. B is a pulley at the top thereof.

)is the hoisting-rope, one end of which is attached to a ring, E. D is the platform, to which is secured a frame consisting of four uprights, F, placed on' the opposite sides ofthe elevator-frame A, thereby forming guides to maintain the platform Bin its proper position. The uprights F are con nected to each other hy the transverse pieces f, either mortise and tenen, or in ,any other convenient manner. the pieces f to each other and leave an open space, G,vwhich serves the purpose toA receive the locking devices H, which are preferably of castings of any suitablenietal, and are provided on top with eyebolts h, have a rounded surface where they come in contact at I, and also slots h', as well as serrated pointsat J.. Bolts K pass through each of the trans-l Short pieces f connect verse pieces f, and also through theslots h', and thus form pivots upon which the pieces oseillate. Yokeshape pieces L,ha ving suit-` 'near upon the -top'of th'epieces H andserve to maintain the .properdegree of tension' of the chains O While the platform is being .hoisted by means of the rope C, as Well 'as to cause the pieces Izl to hear against each other at I, and the points J to bear against the elevatorframe A, and thus prevent the descent of the platform D, should any breakage occur in the hoisting machinery. l Y

Having described my invention, what I desire to secure by Letters Patent, and claim, s-

1. In an elevator, the platform D, provided with a frame consisting of Vthe uprights F, transverse pieces f, and short pieces f', iu

.combination with the castings H, having the rounded bearing-surfaces I, and serrated points '.I, pivoted to said frame, the 'springs Q, and the frame A, substantially as described, and for the purposes set forth.

2. In an elevator, the

the topthereof the pulley B, the platform vD,

having uprights F, transverse pieces f, and short pieces f in combination witlt-he hoisting-rope C, ring E, chains N O, yoke-shape frame A, having at pieces L, and bolts K, the castings H, andsprings Q, all arranged and operated inthe manner herein described.

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

CASH C. THOMAS.

Witn esses:

W. P. LEONARD,r G. C. PURDUE.

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