US540813A - Locking device for elevators - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. T. W. JENKINS. LOCKING DEVICE FOR ELEVATORS.

No. 540,813. Patented June 11, 1895.

Inventor.

Witnesses.

Attorney.

(No Model.) 2 Sheets-Sheet 2.

T. w. JENKINS. LOGKINGDEVIGE FOR ELEVATORS. No. 540,813. I Patented June 11,1895.

'tnsses' Tl Inventor. fl/,;%;M% 2

Attorney.

THOMAS VVfJENKINS, OF PHILADELPHIA, PENNSYLVANIA.

LOCKING DEVICE 'FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 540,813, dated June 11, 1895.

' Application filed November 30, 1894:. Serial No. 530,357- (No model.)

To all whom, it may cancer-7M Be it known that I, THOMAS W. JENKINS, a citizen of the United States, residing at Phil'a. delphia, in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Looking Devices for Elevators; and I do declare the following to be a full, clear, and exactdescription of the invention, such as willenable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a partof, this specification.

My invention relates to safety attachments for elevators and the objects of my improvements are, first, to lock the-power controlling mechanism, in such a manner that the car or cab of the elevator cannot be moved up or down from any landing until the door to the elevator well has first been closed; second,to securely fasten the door of the well of the elevator, should the latch ordinarily placed thereon, fail to catch when the door is pushed over by the attendant in the elevator.

I accomplish the desired, result by means of suitable mechanism attached to the car of the elevator and operated by the opening and closing of the door to the well of the elevator, as will be hereinafter described and more particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front view of an elevator-car and a section of the wall of the elevator-well. Fig. 2 is a horizontal sectional view of the car above the floor. Fig. 3 is a detail view of the rod or bar attached to the bottom of the door to the elevator-Well. Fig.4 isa front view of an elevator-car having the door broken away and showing myimprovement attached to a wheel instead of the lever shown in Fig. 1. Fig. 5 is a plan VlBW of the disk and connecting-levers attached underneath the car. Fig. 6 is a face view of the disk secured back of the power-controlling wheel shown in Fig. 3.

A, is the elevator car or cage which is of the usual construction and operated in the ordinary manner..

A, is the sliding door secured in the elevator Well at each landing.

B, is the lever or power controlling mechanism shown in Fig. 1.

O, is an iron disk secured under the floor of the car and turning on the central shaft 0..

b, is an iron link attached atone end to the under side of the disk G, at b, the opposite end being secured to the crank O.

D, is a plate or bracket secured underneath the floor of the car and supporting the crank O. I

d, is a curved lever one end of which rests upon the crank O, the opposite end being pivoted at d, to the plate or bracket D. E, is a verticaltlock rod attached to the lever B,- and sliding up and down in the guides or straps e, e. The lower end of this lock rod rests upon the curved part of the lever d.

F, is a guide for the upper end of the le-- ver B.

f, is a slot in the guide F,-for the reception of the upper end of the lock rod E.

c, o, are two pins in the rim of the disk 0.

a,is a bar or rod secured rigidly to the sliding door A, in such a position that when the car of the elevator stops at or passes any landing the bar a, will be between the pins 0,0, in the position shown in Fig. 1.

The car or cage A, of the elevator being fitted with the above described mechanism arranged as shown in Figs. 1 and 2, and having arrived at a landing, the sliding door A, is opened by sliding it back toward the lever B. ,Asit moves along in that direction, the

When the elevator car A, is provided with a power controlling wheel B, instead of the lever B, the wheel is frequently placed on the opposite side of the car, in the position shown in Fig. 3, and the operation of my device is slightly different. The jointed link b ,operating the lock rod E, is connected at one end to the pin 1), in the disk 0, and at the opposite end to the crank 0 that operates the lock E, which is pushed into the notch in the disk F, secured back of the power controlling wheel B.

\Vhen the locking mechanism is arranged.

in the manner shown in Figs. 4 and 5, the opening of the sliding door will cause the several parts to operate and shove the end of the lock rod E, into the notch la, in the disk F. The mechanism secured to the wall of the elevator well for holding said door locked in position in the event of a failure to latch when thrown 'back, is also operated by the opening and closing of the door and its construction is as follows:

G, represents a bracket fastened to the side wall of the elevator; g, a swinging lever secured therein.

g,is a small roller or projection secured in the side of the lever g, a short distance from the free end thereof.

H, is a bracket fastened on the front wall of the well of the elevator.

h, is a latch pivoted to the bracket H.

h, is an enlarged end or head on the latch h, the slanting edge of which rests upon the roller 9.

h is a rod one end of which is attached to a pin on the disk 0. The opposite end of this rod is loosely supported by the strap piece it, secured on the floor of the car.

If, is the bent-over end of the rod h This rod 7L2 together with the disk constitutes the mechanism secured to the elevator car t h rough which the door locking mechanism is operated by the sliding back and forth of the door of the elevator well.

a is a bumper or stop for the forward end of the latch 72, fastened on the inside of the elevator door A.

hen the latch 72, is in the position shown in Figs. .1 and 4., the opening of the door A, turning the disk (1, will move the lever 7L2, causing the bent over end It, to strike against the free lower end of the lever g, pushing it back toward the wall and causing the roller g, to raise the end of the latch h, that rests thereon. This movement will depress the opposite end of said latch and allow it to pass under the stop a between the bar a, and the bottom edge of the door A. It' the elevator car is not at the landing, there will be no means of operating the latch h, and the end will strike against the bumper or stop (1 that is attached to the sliding door A. Consequently the door A, on a failure to latch properly, can only be opened the distance between the inner end of the latch 71., and the outer edge of the sliding door A, which would only be about four inches.

Having thus described my invention, what I claim as new is- 1. In an elevator, the door A, and a suitable mechanism secured to the wall of the elevator well for holding said door locked, in combination with the car and mechanism secured thereto through which the said locking mechanism is operated by the movement of the door, as set forth.

2. In an elevator, the combination of the door A provided with a bar a, the car and disk C journaled thereto and having on its periphery means for engaging the bar a, and a crank connected with said disk, with the power controlling mechanism, a lock rod operated by said crank, and adapted to engage and lock the power controlling mechanism when the door is open, as set forth.

3. In an elevator, the combination of the door A provided with bar a, the car and disk 0 journaled thereto and having the pins 0, c, thereon, crank G, lever d, resting on said crank, and lock rod E resting on said lever, with the power controlling mechanism, whereby the said power controlling mechanism will be locked to prevent the movement of the car until the door A is closed, as set forth.

4. In an elevator, the door A provided with the bar a, in combination with the car, the disk 0 journaledthereto and having on its periphery the pins 0, c, to engage said bar a when the car is at a floor, the power controlling mechanism,and connections between said power controlling mechanism and the disk (3 whereby the said power controlling mechanism is locked when the door is open, as set forth.

5. In an elevator, the combination of the door A, having thereon the bar a, with the car and disk 0 journaled thereto and having thereon the pins 0, c, the rod 71 the lever g, and the pivoted latch h, as set forth.

6. In an elevator, the combination of the door A, having thereon a bar aand provided with a stop or bumper a with the car and disk 0 journaled to the car and having the pins 0, c, on the periphery thereof, the rod 7L2, the lever 9 having thereon the roller r, and the pivoted latch hhaving on its rear end the enlarged head It, as set forth.

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

THOMAS W. JENKINS.

Witnesses:

SAML. l-I. KIRKPATRICK, 'tHos. D. MOWLDS.

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