US1165929A - Elevator safety device. - Google Patents

Description

Patented Dec. 28, 1915.

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M. ZARADZKI.

ELEVATOR SAFETY DEVICE.

APPLICATION FILED JULYIZ. 1915.

1,165,929. Patented. Dec. 28, 1915.

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M. ZARADZKI.

ELEVATOR SAFETY DEVICE. APPLICATION FILED JULY 12, 19l5.

gnuc'nfoz Gamma MICHAL ZARAIDZKI, 0F CARNEGIE, PENNSYLVANIA.

ELEVATOR SAFETY DEVICE.

Application filed July 12, 1915.

To all whom it may concern Be it known that I, MIOHAL ZARADZKI, subject of the Czar of Russia, residing at Carnegie, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful improvements in Elevator Safety Devices, of which the following is a specification.

This invention relates to certain new and useful improvements in elevator safety devices.

The primary object of this invention is to provide an attachment for elevators manually operable from the elevator car whereby the car may be caught and safely held suspended within the shaft in the event of an accidental severing of the hoisting members or a releasing of the hoisting mechanism.

A. further object of the device is the prevention of accidents to passengers and goods which are sometimes caused by the sudden descent of an elevator car caused by some accident to the elevator mechanism.

A still further object is to provide normally retracted supporting bolts for an elevator car operable by the power mechanism of the elevator and controlled by the operator of the car by means of a vertically arlranged pull cord extending through the car.

With these general objects in view and others that will appear as the nature of the invention is better understood, the same con sists in the novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the appended claims.

In the drawings forming a part of this application and in which like designating characters refer to corresponding parts throughout the several views, Figure 1 is a side elevation of an elevator shaft and car provided with the present device and partially broken away. Fig. 2 is a similar elevational view of an adjacent side of the car. Fig. 3 is a top plan view thereof. Fig. 4 is a central longitudinal sectional detail view through the clutch mechanism of the device, and Fig. 5 is a perspective view of one of the supporting bolts detached.

Referring more in detail to the drawings, the usual vertical shafting 10 is provided within the four corners of the elevator shaft and having a rectangular top frame 11 mounted thereon, while a car 12 is slidably Specification of Letters Patent.

Patented Dec. 28, 1915.

Serial No. 39,341.

positioned within the shaft adapted for raising and lowering under the control of the operator.

Power means for elevating the car 12 is provided in the form of a driven shaft 13 carried by the frame 11 which may be 0perated by any form of motor desired and which motor is not herein illustrated, the said shaft 13 having a gear lt at one end, While a second shaft 15 journaled parallel to the shaft 13 upon the said top frame 11 has a gear 16 operatively connected to the afore-mentioned gear 1 1 by means of an idler gear 17 intermediately positioned with respect to the gears 14 and 16 mounted upon the said top frame by means of a stub shaft 18. Similar drums 19 are carried upon the said shafts 13 and 15, having hoisting cables 20 secured thereto and wrapped therearound and extending over sheaves 21 mounted upon the frame 11 and secured as at 22 to the top of the car 12. It will be understood that by revolving the shaft 13, the shaft 15 is revolved in the same direction and the drums 19 are thus turned for winding the cables 20 thereon for raising the car 12 and for unwinding the said cables therefrom during the lowering operation of the car.

Supporting bolts 23 are positioned through horizontal side openings 2 1 in the opposite beams 30 carried by the shaft timbers 10 and are arranged in opposite pairs at desired intervals throughout the height of the elevator shaft, the said bolts being normally retained in their retracted inclined positions by means of their outwardly positioned weighted ends 25 and in which position the said boltsengage the inclined upper faces 26 of the said slots 24.

An operating cord 27 is secured as at 28 to the outer ends of each of the bolts 23, the said cords running over pulleys 29 carried by the supporting beams 30 and thence over pulleys 31 carried by upright brackets 32 upon the said beams 30 from whence a single strand 33 is carried over a pulley 3-1 upon the beams 10 and thence over a pulley 35 upon a cross bar 36 of the shaft frame.

The arrangement of bolts and operating cords and strands is identical at opposite sides of the elevator shaft, and the said strands 33 from each of the opposite pairs of bolts are connected together as at 37 and united to a single strand 33 which passes upwardly at the side of the shaft and extends over a pulley 39 upon the top frame 10 and thence to a winding drum a0 to which the free end thereof is secured. The said drum is secured to a sleeve 41 longitudinally slidable upon a shaft s2 by means of a spline 4-3, the said shaft 12 being journaled upon the said top frame 11 intermediate the aforementioned shafts 13 and 15. A gear 44: is carried by a sleeve l5 which is journaled in a casting 46 carried by the frame 11 while the said gear a l is in constant mesh with a similar gear 4L7 carried by the driven shaft 13. The aforementioned shaft 3 which is carried by the said frame 11 is journaled at one end within the sleeve 45.

The sleeve il is provided with clutching frame 11 and engages a clutch sleeve 52 upon the sleeve 1-1, while a pull cord 53 is secured to the free end of the lever and extends through an opening 54: in the roof of the car 12 and then passes vertically completely through the ear and is secured at a convenient point 55 at the bottom of the elevator shaft.

When the car 12 is being normally operated the clutch members 18 and 49 are out of engagement and the bolts 23 are outwardly inclinedly positioned. In the event of an accident such as the severing of the hoisting cables 20 resulting in a sudden descent of the car, the operator thereof grasps the cord 53 and by exerting a pull thereon shifts the clutch sleeve ll which engages the clutch members 48 and 49 whereby the shaft 42 and its drum l0 are revolved with the revolving gear l l which is constantly 0perated by the motor, not shown. This turning of the drum 4O winds the rope 38 thereon and exerts an upward pull upon the cords 33 and forces the opposite pairs of bolts 23 Wherever arranged in the shaft, through the beam openings 24: and the car 12 is caught by the adjacently positioned bolts arranged therebeneath, the car being cushioned in its seating thereon by means of springs 56 carried by the bottom of the car, this suspended position of the elements being best illustrated in dotted lines bv Fig. l of the drawing. It will be seen that the operator of the car may readily position the bolts 23 inwardly whenever desired and thus catch the car during any sudden descent thereof occasioned by a severing of the hoisting cables during their operative moving of the car 12, and whereby the car will be prevented from dropping to the bottom of the elevator shaft.

While the form of theinvention herein shown and described is What is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor changes may be made without departing from'the spirit and scope of the invention as claimed.

What I claimas new is 2- 1. A device of the class described,-comprising in combination with an elevator car and the shaft frame thereof, operating shafts for the said car, normally retracted bolts carried by the shafting and supportingly projectable inwardly thereof within the path of travel of the said car, retracting means for the said bolts, cushioning springs upon the bottom of the said car at the sides thereof adjacent the said bolts, and manually adjustable connections between the said bolts and voperating shafts.

2. A device of the class described, comprising in combination with'an elevator car and the shaft frame thereof, operating shafts for the said car, normally retracted bolts carried by the shafting and supportingly projectable inwardly thereof within the path of travel of the said car, retracting means for the said bolts, cushioning springs upon the bottom of the said car at the sides thereof adjacent the said bolts, an

operating drum for the said bolts connecting cords between the said bolts and operating drum, clutch control connections between the said drum and operating shafts, a clutch operating member for the said last-named means, and a cord connected between the said clutch operating member and the bot tom of the shaft and freely extending through the said car.

In testimony whereof I affix my signature.

MIGHAL ZARADZKI.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0.

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