US837253A - Safety device for elevators. - Google Patents

Description

No. 837,253. PATENTEDNOV. 27, 1906. R. D. SEGOY.

Y SAFETY DEVIGE PoR ELEVATORS- APPLICATION FLED HAY 23, 1908.

ST S.

Naeezaee.

Specification of Letters Patent.

Patented Nov. 27, 1906.

Application iled M9423, 1906. Serial No. 318,289.

To all whom t may concern;

, Beit known that I, RUFUsD. SECOY, a citizenoithe United States, residing at Athens, in the county of. Athens yand. vState of' Ohio, have .invented certain new and useful Improvements in Safety Devices for Elevators, of which thefollowing is a specification.

This invention embodies improvementsin that class of safety devices for elevators including clutch means operable on breakage of the elevator cable or rope to eiect automatic stoppage of the elevator-ca e and prevent likelihood of accident or brea age due to fall of said cage in the elevator-shaft.

For a full description of the invention and the ,merits 'thereof' and .also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the ollowing description and accompanying drawings, in whichw- Figure 1 is a view partially in section and partially in elevation, showing the mechanism Which is primarily comprised in the invention. Fig. 2 is a View in elevation, showing the safety-catches, the guide-rail being broken away4 to illustratethese parts; and Fig. 3 is a sectional view on the'line :c of Fig. 2.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings 'by the same reference characters.

In the practical embodiment of the invention it is designed to employ the customary guide-rails 1 in the elevator-shaft, which rails coperate with guides 2, carried by the cage 3, to lguide the same in-its vertical movement. The elevator cable or rope 4 is connected with a ring 5, said rin being attached to the cage 3 by means of c ains or connections 6, the lower ends of which are secured to a crosshead 7, slidably mounted on vertical studs 7 secured rigidly to the up er portion of the elevator in any substantie way. The automatic clutch mechanism for stoppi 0 the elevator should the rope or cable 4 reak is comdprised in suitable brackets 8, attached rigi ly to the top portion of the elevatorcage 3 by suitable fastenings. The brackets 8 are formed with integral spaced bracket members 9, projecti laterally therefrom and extending a short istance from opposite sides of the ca e 3, so as to be arranged at opposite sides o the guides 1. The guides 1 consist of guide-rails, and the bracket members 9 are provided upon the inner sides there-' of with vertically-movable catches 10, nor- V mally spaced from opposite sides of the guides 1. Each of the catches 10is formed longi tudinally thereof with laterallyprojecting ,flanges or ribs 11, which operate in grooves 12 inthe bracket members 9. Said catches -10 are of'wedge form, tapering toward their upper ends and having their sides ad'acent to the guides 1 toothed or serrated toi the gripping action of the catchesl with respect to said guides. with an opening at its upper extremity, through which fastenins or bolts 13 pass to attach the pairs of catc es to the outer ends of levers 14, pivoted between the ends, as shown at 15, to the studs 7 a. The outer end of each lever 14 is longitudinally slotted, as

shown at .17, the slots receiving the member v13, connectingsuch lever to the adjacent catches 10. The inner ends of the levers 14 are connected by links 16 to the cross-head 7. Springs 18 connect head 7 with the car 3 and by reason of the elastic' connection at?,

iorded thereby remove strain from the levers 14 with regard to the manner of connectin said levers with the elevator-rope. Upwar movement of the cross-head 7 is limited by the heads 19, formed vat the upper ends of studs 7 a.

In operation should the cable or rope 4 break as the cage 3 is moving or in a stationary position the tension of the springs 18 will actuate the cross-head 7 downwardly, and this will forcethe inner end portions of the levers 14 downwardly, causing the catches 10 to be forced upwardly into engagement with the opposite sides of the guides 1.

The advantages and operation ofthe parts will be obvious fromlthe foregoing.

Each of the studs 7 a is formed witha shoulder 7bbelow the cross-head to limit the downward movement of the latter. Further, antifriction-bearings in the form of rollers 20 are acilitate Each catch 10 is formed interposed between the studs and the crossfrom the brackets aforesaid and located upon l opposite Ysides of the guide-rails, the guide members of each bracket havi an. interlocki nnection with the cato es to nornlilally old the same out of engagement With t e a po1nt between their ends with the cage, connections between the inner ends of the levers and the rope, means loosely .connecting the outer ends of the levers With-the catches for actuation of the letter, and e cross-'head connecting the levers with the cable of the Vc'asge for the purpose s ecived.

2. In safety evice for elevators, the ombination of a car, studs rejecting uliwvarlly` from the 4top portion ofv t e car, a cross-hesd s'lidebly mounted on said studs and having means for connecting the seme with the elevater-cable, springs connecting the crossguide-rails, levers pivotslly connected at sesgos head with the car, rails for ulding the car inhaving heads at the upBer end to limit the nfiovernentv of the crosseed, levers pivoted between the ends'thereof to the studs and connected to the outer ends thereof with the catches, and links connecting the inner ends of the Ieverswith the cross-head.

In testimony whereof I affix my signature in presenceof two Witnesses. i

- RUFUS D. SECOY. [L. s.]

Witness-es: Y l

ARTHER MCGEANER,

EDWARD A. SECOYT

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