US1084505A

US1084505A - Automatic stop for elevators.

Info

Publication number: US1084505A
Application number: US76595213A
Authority: US
Inventors: Willie Thorson
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-05-06
Filing date: 1913-05-06
Publication date: 1914-01-13
Anticipated expiration: 1931-01-13

Description

W. THORSON. AUTOMATIC STOP FOR ELEVATORS.

APPLICATION FILED MAY 6, 1913.

Patented Jan. 13, 1914.

ammo o Villz'e Thorson wi lmemo COLUMBIA I'LANOGRAPH c0.. WASHINGTON. n C.

SIT S VILLIE THORSON, OF SPARTA, MICHIGAN.

AUTOMATIC STOP FOR ELEVATORS.

Specification of Letters Patent.

Patented. Jan. 13,1914.

Application filed May 6, 1913. Serial No. 765,952.

To all whom it may concern Be it known that I, YVILLIE THORSON, a citizen of the United States, residing at Sparta, in the county of Kent and State of Michigan, have invented new and useful Improvements in Automatic Stops for Elevators, of which the following 1s a specification.

This invention relates to improvements 1n safety stops for mine cages, passenger elevators and the like and has particular application to an automatic stop whereby the cage or elevator will be brought to a standstill in the event of the hoist cable parting or break- In carrying out the present invention, 1t is my purpose to provide an automatic stop for mine cages, passenger elevators and other analogous apparatus which will em- 20 body in its construction, among other teatures, dogs pivotally mounted upon the top of the cage or elevator adjacent to the opposite sides thereof and capable of engaging rack bars secured to the opposite side walls of the well or shaft, such dogs being interconnected through the medium of a leaf spring which acts normally to swing the dogs into active position, the hoistlng rope of the cage or car being connected with the dogs and holding the latter normally inactive against the action of the spring so that when the cable breaks the spring will react and throw the dogs into engagement with the rack bars to bring the car to an immediate stop.

It is also my purpose to provide an automatic stop for elevators which Wlll embrace the desired features of simplicity, efficiency, durability and strength and which may be installed and maintained at a minimum exiense.

VVith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claim.

In the accompanying drawing, Figure 1 is a vertical sectional view through an elevator shaft showing a car therein equipped with an automatic stop constructed in accordance with the present invention. Fig. 2 is a top plan view of the car.

Referring now to the accompanying drawing in detail, S designates an elevator shaft or well in which is mounted for sliding movement a cage or car C. Fixed in any appropriate manner to the opposite side walls of the Well S and preferably coextens'ive with the depth of the well are

rack bars

1, 1, while appropriately fastened to the top of the car or cage 0 adjacent to the opposite sides thereof are bearing blocks 2, 2 having the upper ends thereof forked or bifurcated as at 3 and equipped with pivot pins 4 upon each of which is mounted for swinging,

posite end portions thereof bearing upon pins 9, 9 extending outwardly from the sides of the dogs 5, 5. The numeral 10 designates the hoist cable or rope having the car end bifurcated and the terminals of such bifurcated portion connected in some suitable manner to the inner ends of the dogs 5, 5.

From the foregoing description taken in connection with the accompanying drawing, the construction, mode of operation and manner of employing my improved automatic stop for elevators will be readily apparent. Normally, the hoist cable 10 is taut and the inner ends of the dogs 5, 5 held above the

pivot pins

4, 4 against the tension of the leaf spring 8 thereby holding the outer extremities of the dogs out of the plane of the rack bars. hen, however, the hoist cable breaks or parts, the spring 8 reacts to swing the dogs 5 about their pivot pins and so throw the outer ends thereof into the plane of the

rack bars

1, 1 to take the descent of the cage or car. As the dogs are swung to an active position under the action of the spring 8 the inner ends thereof engage the

abutment blocks

6, 6 and the latter take the weight of the cage as the outer ends of the dogs engage the teeth of the rack bars to hold the cage suspended Within the shaft or well.

I claim:

In an automatic stop for elevators, rack bars secured to opposite sides of the elevator shaft, and a car carried mechanism comprising bearing blocks secured to the top of the car adjacent to the opposite sides thereof, dogs pivoted between their ends within said blocks and having the outer ends therepiece secured to the top of the car between said dogs, a leaf spring secured centrally to said bed piece, pins extending outwardly from the sides of said dogs and receiving 10 the ends of said spring, and a hoist cable connected to the inner ends of said dogs and normally holding the same inactive against the actlon of said sprlng.

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

WILLIE THORSON.

WVitnesses:

' D. J. WALLACE,

MAT THoRsoN.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.