US1280920A - Safety device for vertically-moving doors and window-sashes. - Google Patents

Description

B. WEXLER.

SAFETY DEVICE FOR VERTICALLY MOVING DOORS AND WINDOW SASHES.

APPLICATION HLED DEC. 9. I915- Patented Oct. 8, 1918.

I I1 V611 tor.-

TED STATES PATENT orrion.

BENJAMIN WEXLER, OF BROOKLYN, NEW YORK, ASSIGN OR TO THE PEELLE COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

SAFETY DEVICE FOR VERTICALLY-MOVING DOORS AND WINDOW-SASHES.

Specification of Letters Patent.

Patented Oct. 8, 1918.

Application filed December 9, 1915. Serial No. 66,007.

To all whom it may concern:

Be it known that I, BENJAMIN WEXLER, a citizen of the United States, and a resident of New York city, borough of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Safety Devices for Vertically-Moving Doors and Window- Sashes, of which the following is a specification.

The object of my invention is to provide a new and improved safety device for vertically moving doors and window sashes, so that in case the chain or rope or analogous suspension device, from which said vertically moving door or window sash ,is suspended or connected with the counterbalance weight or with any other counterbalance device, breaks, the door or window cannot drop, but is then suspended and supported by the safety chain or suspension device, whereas theretofore, it, the safety chain, did not actually support the door or sash, but only moved with the same for use in case of emergency, which device is simple in construction, can be applied on any new vertically moving door or sash or on any old door or sash.

In the accompanying drawings in which like letters of reference indicate like parts in all the figures:

Figure 1 is an elevation showing one embodiment of my new and improved safety device for vertically moving doors, or sashes, parts being broken out and others shown in section.

Fig. 2 is a side elevation thereof.

Fig. 3 is a vertical sectional view of the pulley for suspending the supplemental or safety chain, parts being shown in elevation.

I have shown my invention as applied to vertically moving elevator doors. A door for another purpose or a window sash would be suspended practically in the'same manner. The upper door 1 and the lower door 2 are guided to move vertically on tracks 3 in conventional manner, the details of construction of which form no part of my present invention. A housing 4 made in any conventional manner, contains a pulley 5, over which a chain 6 passes, which is attached at 7 at one end to the side edge of the upper door 1, and at the opposite end to the upper end of a rod 8, the lower end of which is connected in the conventional manner with the top cross bar 2 of the lower door 2 or connected in any other suitable way to the lower door. The housing 4 is attached to the guide rail 3 which is provided with the customary slot 9, through which the pulley 5 can project in the usual way, so that the chain 6 passes down between the side edge of the upper door section 1 and the guide rail 3 in the customary manner. The upper door can be over weighted, if desired, so that the doors close automatically, or the doors can be evenly balanced, both of which constructions are in general use.

All that I have described so far, is the old and well known construction of verti- I cally sliding doors.

I attach an additional chain 10 to the upper door section 1 and pass it over a suitable pulley 11 and then pass it down and attach its lower end to the cross bar of the lower door 2 or to the door itself in.

any well known manner. The pulley 11 is contained in a housing 13, which is secured to the guide rail 3, above the housing 4, but not located in the same vertical plane as the housing 4, but in a vertical plane in advance of that of the housing 4, that is, further toward the interior of the elevator shaft, so that the downwardly extending run of the chain 10 does not interfere with the downwardly extending run of the chain 6, but is at the side of the same, as illustrated in Fig. 2.

The pulley 11 is mounted on an axle 14., which passes through vertical slots 15 in the sides of the housing 13, so that the pulley and its axle can move up and down in the housing 13. The ends of the shaft 14 are secured in a yoke 16, preferably located on the outer surface of the side walls of the housing 13 and movable vertically thereon. The yoke 16 is provided with an upwardly projecting arm 17 with which a spring 18 is connected, the upper end of which is attached to a bracket 19 on the guide rail 3. The spring 18 holds the yoke raised so that the shaftlt will be at the upper ends of the slots 15. The housing 13 is so mounted that the periphery of the pulley 11 extends a greater distance beyond the inner face of the guide rail 3 than the pulley 5 so that the chains 6 and 10 do not come in contact and interfere with each other. For the same reason the end of the chain 10 is attached to be slack were it not for the spring 18 which pulls up the yoke 16 and thereby raises the shaft 1 1 of said pulley. It is evident that none of the weight of the doors can act on this chain as otherwise the spring 18 would be extended until the shaft lat rested on the bottoms of the slots. Therefore as long as the chain 6 is intact and supports the Weights of the doors, from the pulley 5, the chain 10 is merely an idle chain which does not assist in supporting the doors in any p0- sition and practically for all purposes is a slack chain, except that slight tension that is given to it by the spring 18. WVhen the main supporting chain or any of its connections, break, at any point, the door descends until arrested by the supplemental chain 10. This distance is equal to the length of the. slots 15, which is about equal to one-quarter to one-third of an inch. As soon as the main supporting chain 6 breaks, the weight of the doors stretches the spring 18 and the shaft 14: of the supplemental pulley 11, rests upon the bottoms of the slots 15, in the sides of the housing 13, and the doors are both suspended from the supplemental chain and can be raised. and lowered, or moved from closed to open position and vice versa, in the conventional manner. There is no danger from the dropping of either door and they work as well with the supplemental chain 10 as they do with the main chain 6. Of course this supplemental chain 10, which is made as heavy as the chain 6,

is only to be used during the interval between the breaking of the chain 6 and the time when it has been replaced by an unbroken chain, when the supplemental chain again assumes the slack position as described above and the spring 18 again raises the pulley 11 for the supplemental chain, into raised position.

Such a supplemental chain may be provided for one or both sides of the door or window frame.

Having described my invention what I claim as new and desire to secure by Letters Patent is In a device of the character described the combination of two vertically movable doors, adapted to have movement in opposite directions in the same vertical plane, a pulley mounted in a fixed housing, afieXible suspension member connected adjacent the top of the lower door and adjacent the bottom of the upper door and passing over said pulley, a second housing mounted adjacent said first I named housing having. elongated slots in the walls thereof, a yoke, a pulley mounted in said yoke, the shaft of said pul ley projecting through the slots in said housing, an expansion sprin supporting said yoke, and an additional chain connected with the upper portion of said lower door and the lower portion of said upper door, and passing about the pulley mounted in said yoke, said housings being arranged in parallel planes, and one above the other, whereby said suspension means are normally so held as not to interfere with each other.

Signed at New Yory city, borough of.

Manhattan, in the county of New York and State of New York, this 8th day of December, A. D. 1915.

BENJAMIN WEXLER. Witnesses:

M. SHAW,

E. S. MITCHELL.

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

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