US355285A

US355285A - Elevator

Info

Publication number: US355285A
Authority: US
Publication date: 1886-12-28
Anticipated expiration: 1903-12-28

Description

A'. F. WARD :8; G. MEAD.

2 Sheets-Sheet 1.

(No Model.)

ELEVATOR.

No. 355,285. Patented De0.'28 ,'1886- m: New 5.

3\\mx mwkex Y we LJITIFI N, PETERS, Photo-Linwgraphm. Walhingtun. n c

2 Sheets-Sheet. 2.

(No Model.)

A. F. WARDXE G. MEAD.

"ELEVATOR.

No. 355,285. Patented Dec. 28, 1886.

UNITED STATES PATENT OFFICE.

ALEXANDER F. AR-D AND GEORGE MEAD, OE DETROIT, MICHIGAN.

ELEVATOR.

SPECIFICATION icrming part of Letters Patent No. 355,285, datedpecember 28, 1886.

Application filed February 25, 1886. Serial No. 193,138.

To all whom it may concern:

Be it known that we, ALEXANDER F. WARD and GEORGE MEAD, of Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Ele vators; and we hereby declarethat the following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form a part of this specilication;

This invention relates to a new and useful improvement in devices especially designed for locking elevator hatch-doors against accidental displacement.

The object of the invention is to provide means for locking hatchway-doors of the trapdoor style particularly, and in providing means for opening the doors up or down in the travel of the elevator; and the invention consists in the peculiar construct-ion and application of mechanism arranged with a counterbalance to the door that will compel such door to assume its horizontal position, closing the hatchway immediately after the passage of the elevator, all as more fully hereinafter set forth. Figure 1 is a perspective view of a hatchway and platform-elevator provided with our improved device. Fig. 2 is a vertical section showing the elevator as in the act of passing through the hatchway and opening the trap. Fig. 3 is a diagram section. Fig. 4 is a detailed perspective of one'of the lock-levers.

In the accompanying drawings, which form a part of this specification, A represents a hatchway through which the elevator'B is designed to pass, as in the ordinary manner. In the construction shown the guide-posts for the elevator are at the center of the sides of the hatchway, and hence our device is arranged in connection therewith for operating the trapdoors 0, which are secured to a rock-shaft, D, properly j ournaled across one side of the hatchwayopening, and preferably below the level of the floor. .45

rocker-arm, I, said rocker-arm and plate be- (No model.)

ing rigidly secured to the pinion F, so as to turn therewith. In each end of the rockerarm is secured an anti-friction pulley or wheel, a a.

J is alever, one end of which is fulcrumed, as at 01, while the opposite end, when in the position shown in Fig. 3, rests uponthe antifriction rollers a a and this lever is rovided with a weight, K, and the plate H has also pivotally secured to one corner a counterweight, L, both of these weights being sufficient to compel the doors to assume a horizontal from a vertical position, as hereinafter set forth. I I

At the opposite side of the hatchway to that occupied by the shalt Dis journaled in proper bearings arock-shaft, M, to which, upon opposite sides of the adjacent elevator-guide, are secured the stops N O,the former of which has formed in its outer end a suitable hole to admit of the pin or stud P, which projects laterally from the side of the lever It, which latter is fulcrumed to the adjacent side of the post by means of a suitable bolt, 6, which passes through the slotc in the upperend of the lever, as shown.

In practice, the parts being in the position shown in Fig. 3, with the elevator below the floor, as the elevator rises an arch-piece, S, upon its top comes in contact with the lower face of one of the doors, while a bar, T, upon its side at the same time impinges against the face of the curved and lower end of the lever B, pushing such lever outward, causing the stops N and O to turn into nearly a-vertical position. In the progress of the car the doors are opened, as in Fig. 3, from a horizontal to a vertical position, as shown in Fig. 1. The doors in assuming this position have necessarilyturned or partially rotated the rock-shaft D, and by the means herein described cause the plate H to assume the position shown in the same Fig. 1, with the end of the lever J resting now upon the anti-friction roller c of the rocker-arm. After the elevator has passed the free ends of the doors the counter-weight K upon the lever performs its functionby forcing or bearing down upon such anti-friction roller, and thereby compelling aretrograde movement of the parts, the doors gradually closing from the vertical to the horizontal position and resting upon the ends of the stops N O, which have by gravity fallen forward in the line of radial travel of the door immediately after the passage of the elevator, and in this position the trap is held against accidental displacement or opening in case any one should step upon it. As the elevator descends the bar T impinges against the upper part of the lever B, forcing it and the stops outwardly, free from engagement with the door, which is then free to be opened downwardly by the elevator. wardly the connected mechanism has assumed a position the reverse to that shown in Fig. 1, with the end of the lever J resting upon the anti-friction wheel a. The elevator having passed the lower end of the door, the weight L causes the shaft D, through the mechanism hereinbefore described, to partially rotate. The door radially swinging upward, the corner (1 of the cut-away portion of the door pushes the stops and leveroutwardly until the door has swung past, when the stops again assumetheir original position, the door falling back upon them.

We design to employ similar stops at the outer corners of the doors, although but two are shown located at the center of the hatchway.

1t is obvious that our device can advantageously be attached to any and all kinds of trap swing-doors without departing from the spirit of our invention. It will also be observed that, where the room will admit of it, the pinions E and F may be omitted, the plate H and rocker-arm Ibeing in this case connected directly to the shaft D.

Theweight L is a counterweight to the door, while the function of the weight K and lever J is to compel the doors to close from either direction, and to hold them in a normal horizontal position, the end of the lever resting upon the two fulcrums a a in a horizontal plane.

In opening the doors down- What we claim as our invention is- 1. The combination, with the hatchway and 5 elevator-car, of the rockshaft M, stops carried 2. In a hatchway-elevator provided with a 50 swinging door or doors secured upon a rockshaft,in combination with a weighted lever and rocker-arm, the latter being provided with a. bearing at each end for the free end of the lever, and connections, substantially as described,be-- tween said rock-shaft and rocker-arm, whereby the latter is operated by the movement of the former, substantially as set forth.

3. The combination,with the hatchway,rockshaft D, journaled therein, and doors carried by said rock-shaft, of the lever J, plate H, and rocker-arm I, said shaft and rocker arm all arranged and operating substantially as and for the purposes specified.

4. The combination, with the hatchway, the rock-shaft journaled therein, and the door secured to said rock-shaft, of the lever J, semicircular plate H, connected and operated by said rock-shaft, weight L, and rocker-arm I, provided with rollers a a, substantially as and for the purposes specified.

5. The combination, with the hatchway, the rock-shaft D, journaled therein, and the doors carried by said rock-shaft, of the pinions E F,

semicircular plateH and rocker-arm I, pro- 7 vided with rollers a a and secured to said pinion F, the pivoted weighted lever J, and weight L, all substantially as shown and described.

ALEXANDER F. WARD. GEORGE MEAD.

Witnesses:

H. S. SPRAGUE, EDMOND SoULLY.