US920820A

US920820A - Elevator safety-lock.

Info

Publication number: US920820A
Application number: US27645305A
Authority: US
Inventors: Edward J Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-08-30
Filing date: 1905-08-30
Publication date: 1909-05-04
Anticipated expiration: 1926-05-04

Description

E. J. BROWN. ELEVATOR SAFETY LOOK.

APPLICATION IILED we. go, 1905.

Patqnted May 4, 1909.

WITNESSES.

in: mamas PETERS 00., wnsnmuron, n. c

m r Q I AT7'0HN fEnw Rn J. BROWN, orBRooKLYN; NEW YORK.

ELEVATOR SAFETY-LOCK.

To all whom it may concern:

Be it known that I, EDWARD J. BROWN, a citizen of the United States, and a resident of Brooklyn,

York, have invented new and useful Improvements in Elevator Safety-Locks, of

which the following is a specification.

My invention relates to elevators and it has for its object to provide a safety means which will prevent the operation of the starting means except by: the operator and only when the operator is in position to operate the car.

It has for its furtherobject to provide an automatic means for stopping the car.

In many of the systems now known in the art, wherein the elevator is'started'by pulling a rope which passes the'length of the elevator shaft, the motor may be started by any one located on any of the floors of the elevator shaft. This is sometimes done when the operator has left the car. The removal of the car at such a time endangers the life not only of the operator but also of any passengers who may wish .to use the car.-

My 1nvent1on provides means for preventing the movement of the car unless under the control of the operator. Furthermore, if the operator should fail in his duty for any reason whatever the elevator will be automatically stopped by my invention. Settling of the elevator car due to leaking of valves is also of all passengers using the elevator to which my invention is applied is greatly enhanced.

My invention comprises a means for operating and controlling the starting means of the motor. The controlling meansis automatically operated to stop the car and the car is held stationary. The controlling means may be secured to the car and upon movement of the car the starting rope may be operated to bring the car to a standstill and to maintain it in that position. i

The invention comprises other features which appear in the followingdescription, are shown in the drawing and are claimed in the claims. I

Referring to the drawing, Figure 1 illustrates a vertical sectional view taken through the center of the device embodying my invention. Fig. 2 illustrates the top view of the device. 1

1, Fig. 1, is the supporting frame of the automatic grip device. The frame 1 consists of two parts 2, 3, which are bolted to- Specification of Iietter s Patent. I

county of Kings, State of- New prevented. Thus the safety I Patentu vray'a, 1909.

Application filed August so, 1905, SeriaI No. 275,453.

gether bynieans of bolts 4, 5, which pass through ears located on each side of the parts 2, 3. [The-frame 1 has a base plate 6 having holes 7 through which screw bolts maybe passed for securing the device to the floor of the elevator car or for securing it in any Other proper position conducive to effectual working of the device.

' A slot 9 is formed in part 8 of the frame 1. On each side of the slot 9 are located cars which form supports for

pivot pins

10, 10 for wheels 11, 11. The wheels 11, 11 are I located in the slot 9 and are eccentrically mounted on' the

pivot pins

10, 10. The

wheels or, cams 11,11 have in each case a groove12 in. the circumference.

13 is the starting rope well known in the art, which starts the elevator car up when it is pulled down and which starts the elevator car down when it is pulled up and which stops the car when pulled to an intermediate position. The starting rope 13 is located between the grooved cam wheels 11, 11 and the frame 1. As the cam wheels 11, 11 are turned they operate either to grip the starting rope or to release it.

The wheels 11, 11 are turned by the oper ation of links 14, 14 which are loosely attached to the wheels 11, 11 by means of loosely mounted

pins

15, 15 which pass through the links and wheels at points near the circumferences of the wheels.

Channels

16, 16 are cut into the wheels 11, 11, which permit of movement of the wheels with respect to the links 14, 14. The links 14, 14 are also loosely attached to a bell-crank lever 17 which ispivoted at 26 to the base plate 6 of theframe 1. The bell-crank lever may be operated by hand or by foot. In the form of device shown it is operated by foot. A pin 18 having a fork 19 is provided and is connected to the arm 20 of the lever 17 by the pin 27. The pin 18 passes up through the flooring 8 and is provided with a head 21. The head 21 is adapted to be pressed downward by a foot of the operator.

The pivot connections of the di'fierent parts of the device are loose so that there is a free movement of one with respect to the other. In the drawing slots are shown located in the parts in which the pivot pins are inserted to connect the said parts together. This allows a free movement of the cams with respect to each other. This is true of all of the pivot pins of the device excepting the pivot pin about which the arm 20 is removed the spring 22 lifts the lever arm 20 and causes the links 1 1, 14 to turn the cams 11, 11 so that they will grip the motor controlling rope 13. hen the car is moving up the gripping mechanism will seize the motor controlling rope 13 and pull it up untilthe car stops. The same is true When the car goes down. The rope can not be again moved until the gripping mechanism is operated upon to release the rope when it may be pulled up or down according'to the direction that it is-desired to start the car. The rope can not therefore be moved unless it is done by some one in the car and; then only upon the operation of the grippingmechanism to release the controlling rope 13.

that I claim as new and desire to secure by Letters'Patent is as follows z- '1. Inan elevator the combination of a frame located on the elevator car, a starting rope movable in the said frame, a pair of cams mounted in the said frame, links attached to the said cams and adapted to operate the same, a lever also mounted in the said frame and attached to the said links and manual means for operating the said lever.

2. In an elevator system the combination of a tubular frame having a slot, cams mounted in the said slot, links attached to the said cams and adapted to turn them, a lever attached to the said links, and a foot pin adapted to operate the said lever.

3. In an elevator the combination of a pair of cams, a starting rope, a spring for causing the said cams to frictionally engage With the said rope, a lever, links for connecting the said lever to the said cams and a manual means for Withholding the operation of the said spring, a frame adapted to r ceive the said rope and to support the said parts, the said frame being located on the elevator car.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribin witnesses.

EDVARD J. BROWN.

Vitnesses FAUST- F. CRAMP'roN, ALEX. BROUGH'.