US287012A

US287012A - Elevator

Info

Publication number: US287012A
Authority: US
Publication date: 1883-10-23
Anticipated expiration: 1900-10-23

Description

(No Model.) I

W. DUTEMPLB.

ELEVATOR.

No. 287,012. Patented Oct. 23, 1883.

WITNEEEEE INVENTU Fig-2 z I wzwanwfl UNITED STATES PATENT OFFICE,

WILLIAM DUTEMPLE, or BOSTON, MASSACHUSETTS ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 287,012, dated October 23, 1883.

Application filed December 16, 1882.

To all whom it may concern Be it known that I, WVILLIAM DUTEMPLE,

a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented. certain new and use-' be hereinafter described, and particularly pointed out in the appended claim.

In the accompanying drawings, Figure 1 is a view showing my device as applied to an elevator, one half of the elevator-carriage being shown in elevation and -the other half in verticalsection. Fig. 2 isa horizontal section on line y 3 Fig. 1.

The letters B B represent the vertical posts to which the ways B B are attached. 'A A designate the elevator carriage, and' O the hoisting rope or ropes. All of the above parts may be constructed in the usual manner. I wish it to be understood that the ways B B are made of wood.

G is the draw-bar connected to the central portion of the carriage A, and it is provided with openings 0 c, the upper one of which receives the central part of the leaf-spring D, while the lower one receives the ends of the bell-crank levers H H, as shown in Fig. 1.

, These bell-crauk levers are pivoted to the frame of the elevator-carriage at their knee portions K, and are provided at their vertical portions H H with feet terminating in chiselshape edges H These bell-crank levers are of the shape approximating the leg and foot of a human being.

My device operates as follows: When the (N0 model normal strain upon the hoisting-rope G and the draw-bar G is exerted, then the draw-bar C, the leaf-spring D, and the bell-crank levers H H are all in the position indicated in Fig. 1 and the elevator-carriage can traverse freely; butin case strain is withdrawn from the draw-bar 0, either by the breakage of the rope or from any other cause, then the leafspring D, by its resilience, throws the drawbar downward, which action will cause the bell-crank levers H H to swing on their knee portions K, and thus force the chisel-edges H of the feet into the ways B B, and thus prevent the fall of the elevator-carriage. As this action takes place it is evident that the chiseledges H of the feet will be forced deeper and deeper into the wooden ways B B,unt-il they obtain a hold sufficiently firm to sustain the weight of the elevator-carriage.

Having described my invention, what I claim is p In an elevator, the combination, with the posts B B, having wooden ways B B, of the carriage having the draw-bar 0, provided with openings 0 c, the leafspring D centrally ar ranged in the opening 0, the bell-crank levers H H. connected at their inner ends in the opening 0, and pivoted at their knee portions K to the carriage-frame, and thevertical portions H of said bell-crank levers, having feet provided with chisel edges H, which are adapted to be forced into the wooden ways B B of the posts B B, when required, by the resilience of the leaf-spring D, as shown and described.

. IVILLIAM DUTEMPLE.

\Vitnesses:

OHAs. SPAULDING,

FRANK G. PARKER.