US687306A - Locking device for elevators. - Google Patents

Description

No-. 687,306. Patented Nov. 26, IQ OI."

R. W. HARE.

LOCKING DEVICE FOR ELEVATORS A umion filed Mar. 18, 1901.) (No Mqdel.) 2 SheetsSheet wilt mow I mzwomus FETR5 co.. nuoroummwnsmncrow o. c.

(No Model.)

n. w. HAREi LOCKING DEVICE FOR ELEVATORS.

(Application filed Mar 18, 1901.)

Patented, Nov. 26, I90].

2 Sheets-Shut 2.

UNITED STATES PATENT Erica.

ROBERT \V. HARE, OF PITTSBURG,PENNSYLVANIA.

LOCKING DEVICE FOR ELEVATORS.

SFEGIFIGATI'ON forming part of Letters Patent No. 687,306, dated November 26, 1901. Application filed March 18, 1901- vSerial No. 51,654. (No model.)

To all whom it may concern.-

Be it known that I, ROBERT W. HARE, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Looking Devices for Eleva tors, of which the following is a specification.

My invention relates to improvements in locking devices for elevators, and pertains to means whereby the controlling member for the elevator-power is locked when one or more of the doors in the elevator-shaft is open, all of which will be fully described hereinafter.

The object of my present invention is to provide means for locking the elevator-power controller when one of the doors of the eleva tor-shaft is open, whereby-the elevator-car cannot be moved while the door is open, and to lock the door closed when it is shut, and at the same time to release the elevator-power controller, whereby the attendant can cause the movement of the elevator-car in either direction in the elevator-shaft when the door is closed.

My present invention is so constructed that the door cannot be moved at all in the direction of opening it until the elevator-power controller is positively and absolutely locked, and the construction is such that the door is locked closed absolutely before or at the same time that the elevator-power controller is released and before the car can be moved.

In the accompanying drawings, Figure 1 is a side elevation of an elevator-well, the doors being shown shut and the controller-locking device released. Fig. 2 isa similar view, the lower door being open and the locking device positively locking the elevator-controller. Fig. 3 is an enlarged View of that partof my locking mechanism that cooperates with the door for locking and releasing it. Fig.- 4 is a detached perspective view of the sheave or wheel around which the elevator-controller rope passes and the locking-latch, which is adapted to lock and release the said sheave, according to whether the doors in the elevator-shaft are closed or one of them is open. Fig. 5 is a detached enlarged perspective view of the door locking latch and the handle or lever by means of which it is actuated.

The general construction of an elevator-well and the sliding doors is so well understood by A is the elevator-well framework, and B the I sliding doors, which are adapted to be moved into closed and open positions for the purpose of permitting access to and preventing exit from the elevator-car. These doors and the elevator-well may he of the ordinary construction, as they themselves form no part of my present invention.

0 is the sheave, around which the usual elevator-controlling rope D passes, and the wheel 0, as is well understood by those skilled in the art, is adapted to control the elevator-power, whether that be electrical, hydraulic, or other power. This sheave or controller-wheel O is provided with one or more projections a, which form a locking-notch for the engagement of one end of the locking-leverE. The locking end dis heavier than the opposite end of the lever E, whereby the locking-lever is normally in the position shown in Fig. 2, and therefore normally in engagement with the controller sheave or wheel 0. This lockinglever E is controlled through the means of the mechanism which I will now describe. The mechanism which I use for controlling this locking-lever E is adapted to be modified in many ways without departing from the spirit and scope of my present invention, the preferred form, on account of simplicity and cheapness in construction, being that shown in the accompanying drawings. This mechanism consists of a lever F for each door, and which has one end pivotally connected, as shown at e, its opposite and free end adapted to pass through a suitable slotted keeper G, which is attached to the inner side of the door near its edge. This lever F has its free end provided with a vertically or laterally arranged shoulder f, which is adapted to engage with the said slotted keeper G when the door is closed, as shown in Fig. 3, and thus positively and absolutely lock the door closeduntil the free end of the said lever F is lifted for the purpose ofcarrying the shoulder f in a line with the slot or opening it in the said keeper. For the purpose of I forming a sup port for the inner end of the said lever F, I

ICO

lever F and its opposite end j formed into a.

handle by means of which it can be depressed and the free end of the lever]? raised for the purpose of permitting the door B to be opened.

A rope, chain, or other ligament J is suitably adapted to engage with the free end of the lever F. As here shown, the manner of making this engagement consists in providing the free end of the lever with the laterally-projecting ear K, said ear having a perforation m, through which the said rope or ligament J is adapted to pass. The rope or ligament J is provided with a suitable stop M, which is preferably adj ustably connected therewith for the purpose of resting or engaging the upper side of the said ear K of the lever F. This rope or ligament preferably passes around a sheave or pulley N at the upper end of the elevator-well and carries a weight P, and its lower end passes through an opening 1", made in the end 7' of the said locking-lever E. The ligament or rope J is also provided with a stop 8, adapted to engage the upper side of the lever, as shown in Fig. 1, for the purpose of depressing the said lever and moving its opposite end upward in position (shown in said Fig. 1) for releasing the said controller-pulley 0. Connected to the lower end of the rope or ligament J is a Weight S, which is heavier than the weight P and normally holds the rope or ligament down, as shown in Fig. 1, and consequently normally holds the locking-lever E in its unlocking position.

In operation when the attendant of the elevator reaches a floor in the building and wishes to open the door B he depresses the endj of the lever I, which moves the free end of the lever F upward and pushes its shoulder font of engagement with the keeper G upon the door. This movement lifts the ligament or rope J and permits the lever E to assume the position shown in Fig. 2, and in this position itlocks the controller-wheel C. It will thus be noted that this movement accomplishes a two-fold f unction-namely, the looking of the controller-wheel (J and the unlocking of the door B. It will also be noted that the controller-wheel C is locked before the door can be moved, or, in other words, is locked before the door is unlocked. This will absolutely prevent any accidents in the use of a device having these characteristics.

When the door B is closed, the lever F falls to the position shown in Fig. 1, and the weight S draws the ligament or rope J downward, thus releasing the locking-lever E of the controller 0. Here it will be noted that the door is locked before the locking wheel or sheave C is released, which insures absolutely not only the closing of the door, but the locking of the door, before the controlling means is released, and hence the locking of the door before the elevator can be moved.

It will be readily understood that many modifications of this specific construction could be devised for the purpose of accomplishing the ends and operation hereinbeforo set forth.

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

1. In an elevator, an elevator-well, a longitudinally-sliding door therefor, said doorhaving at a point intermediate its ends a lockinglever slideway and support, a hand-operated horizontal lever pivoted at one end .to said well and having its opposite end adapted to rest upon said slideway, a motor-controller, a lock therefor, and a controlling-line for said lock having a shoulder in the line of travel of the free portion of said pivoted lever.

2. In an elevator, an elevator-Well, a sliding door therefor, a horizontal locking-lever having one end pivoted to said well, a locking and lever-supporting member carried by said door, a hand-lever-actuating member carried by the door for lifting the free looking end of the horizontal lever, and a motorcontrolling line having a shoulder in the line of travel of the free end of said locking-lever.

3. In an elevator, a motor-controlling line, a motor-controlling device between the line and the motor, a lock for said device, ahandoperated lever having a vertical opening in its free end, and a line controlling said lock passingloosely through said opening and provided with a shoulder in the path of the free end of said lever.

4:. In an elevator, a motor-controlling line, a motor-controlling device between the line and the motor, a lock for said device, a line controlling said lock, and a lever having one end pivotallysnpported and its opposite free end constituting a combined hand and lock line operating end.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ROBERT W. HARE.

\Vitnesses:

WM. 0. CHARLTON, WVM. K. GRAY.

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