US1278380A

US1278380A - Elevator safety appliance.

Info

Publication number: US1278380A
Application number: US16391017A
Authority: US
Inventors: John Plym
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-04-23
Filing date: 1917-04-23
Publication date: 1918-09-10
Anticipated expiration: 1935-09-10

Description

J. PLYM.

ELEVATOR SAFETY APPLIANCE.

APPLICATION FILED APR, 23. I9I7,

1,278,380, Patented Sept. 10,1918.

2 SHEETS SHEET I.

4& 11 1% ATTORNEYS.

J. PLYM.

ELEVATOR SAFETY APP-NANCE.

APPLICATION FILED APR.23. 19w.

Patented Sept. 10, 1918.

2 SHEETS-SHEET 2.

A TTORNEYS.

- matically stoppirlg tor cage or car the invention;

JOHN PLYM, OF ARGO, ILLINOIS.

ELEVATOR SAFETY APPLIANCE.

To all whom it may concern: 7

Be it known that 1, JOHN PLYM, a subject of the King of Sweden, residing at Argo, in the county of Cook and State of Illinois, have invented new and useful Improvements in Elevator Safety Appliances, of which the following is a specification.

This invention relates to devices for autoand supporting an elevator car or cage in the event of breakage or failure of the usual hoisting cables, and the invention has for its object to provide a novel and improved device of the kind characterized by a catch or brake device which is brought into engagement with the In order that the invention maybe better understood, reference is had to the accompanying drawings forming a part of this specification and in said drawings- Figure 1 is a front elevation of an elevashowing the application of Fig. 2- is a side elevation thereof;

Fig. 3 is a plan view of a portion of the mechanism; and

Fig. 4 is an enlarged section on the line 4 1 of Fig. 1.

s On the top 5 of the cage, in

Referring specifically to the drawings, 5 denotes the top, 6 the floor, and 7 the sides of an elevator cage or car of conventional.

construction. The cage is supported by hoisting cables 8 connected to the topthere- -of and operated in any suitable manner.

Two pairs of cables are prov1ded, one pair, as usual, being counterweighted, and the other pair being connectedv to the hoisting mechanism. As this arrangement is well known, a further description is deemed unnecessary; nor has the hoisting mechanism been shown as it forms no part of the present invention.

proximity to the cables 8, is mounted a series of fulcrum bearings 9 for trip levers .10, one for each cable, one end of the levers being apertured and the cables passing through said apertures. ,The opposite end of each lever is pressed upward by a heavy expanding coil .spring 11. The levers are plvotally mounted to swing in a vertical plane, and'when guide or safety rail alongside the car, and which is controlled by the hoisting cables.

22 with the rails 21,

Specification of Letters Patent. Patented Sept, 10, 1918,

Application filed April 23, 1917. Serial No. 163,910.

On the top 5 of the cage are also mounted bearings 12 supporting a rock shaft 13 of rocker arms 13 The rocker arms 13 10 which is provided with a series and a rocker arm 13. rest onthat end of the levers pressed by the springs 11, and to the rocker arm 13 is connected a rod 14 which extends downward alongside the car. The rod is also provided with a handle device 14; for manual actuation, and a turn-buckle 14: for adjustment and for taking up slack.

The lower end of the rod 1 1 is connected to a rocker arm 15 on a shaft 15 supported eccentric brake shoes 22 having a toothed or serrated periphery. These brake. shoes arepositioned opposite the rails-21 to come into frictional engagement therewith'when the shaft 18 is rocked. The brake shoes are normally clear of the rails.

In order to rock the shaft 18 to apply the brake shoes 22, said shaft is fitted with outstanding arms 23 which are engaged by coiled springs 24: positioned between said arms and the cage bottom 6. The shaft is T-rails 21 mountlocked by the parts 15 and 16, and the latter, in turn, are controlled by the cables 8 through the

parts

10, 13, 13, 13? and 1% It will be understood from the foregoing if the cables 8 should break or fail from any cause, the springs 11 will rock the levers 10, whereupon, through the

parts

13,13 and 13", the rod 14 is drawn upward, and as said rod is connected to the detent 15" the latter is tripped off the tooth 16 of the collar 17 The shaft 18 is now released, and the springs 24rock the same to engage the brake shoes whereupon the cage is brought to a stop. As each cable 8 is independently connected to a lever 10, the breaka e or failure of anyone of the cables will bring the safety device into action.

The shaft 18 is supported in bearings 25 slidably mounted on a support 25", and engageable by a screw 26, by whlch-"latter the bearing may be adjusted advance the shaft and thus compensate for Wear of the brake shoesQQ. The adjusting screw 26 is threaded through a block 27 on the support I claim.

1. The combination with an elevator cage, and a plurality of hoisting cable's therefor; of a brake mechanism carried by the cage, actuating means for said mechanism, a means for holding the brake mechanism inactive, trip levers carried by the car and having independent connections with the respective cables, means for tilting said levers when released by thecables, a rock shaft having rocker arms which are engageable by the trip levers, and a connection between therock shaft and the aforesaid holding means.

2. The combination with an elevator cage, and a plurality of hoisting cables therefor;

of a rock shaft carried by the cage, means for actuating said shaft, brake shoes carried by the rock shaft, means for locking the rock shaft, trip levers carried by the cage and having independent connections with the respective cables, means for tilting said levers when released by the cables and a connection between the levers and the aforesaid shaft locking means.

3. The combination with an elevator cage, and a plurality of hoisting cables therefor; of a rock shaft carried by the cage, means for actuating said shaft, brake shoes carried by the rock shaft, means for locking the rock shaft, trip levers carried by the cage and havin independent connections with the respective cables, means for tilting said levers when released by the cables, a rock shaft having rocker arms which are engage able by the trip levers, and a connection between the last mentioned rock shaft and the aforesaid shaft locking means.

- 5. The combination wi h an elevator cage,"

and the hoisting cable thereof; of a rock shaftcarried by the cage, means for actuating said shaft, a brake shoe carried by the rock shaft, means for locking said shaft, a trip lever carried by the cage and having a connection with'the hoisting cable, means for tilting said lever when released by the cable, a rock shaft having a rocker arm which is engageable by the trip lever, and a connection between the last mentioned rock shaft and the aforesaid shaft locln'ng means.

In testimony whereof I afiix my signature.

JOHN lLYM.