US1114854A - Automatic door-closing device. - Google Patents

Description

w. E. (BROWN.

AUTOMATIC DOOR CLOSING DEVIUE. APPLICATION FILED MAY 21, 1913.

1,1 14,854, Patented Oct. 27, 1914.

est-' w 8 lm entor:

useful Automatic Door-Closin 'which the following is a speci cation.

' res PATENT OFFICE,

WALTER E. BROWN, OFNEW YORK, Iv, Y., ASSIGNOR TO THE riaELLE COMPANY, or NEW YORK, N. Y., A oonrom'rxou or NEW YORK.

AUTOMATIC DOOR-CLOSING DEVICE.

To all whom it may concern .1

Be it known that I, WALTER E. BROWN, a citizen of the United States, and a resident of New York city, borough of Manhattan, in the county of New York and State of New York, have invented certain new and Devices, of

This invention relates to automatic door closing devices, and the object of my invention is to provide a new and improved automatic door closing device, which is especially adapted and designed for automatically closing vertically movable doors for elevator shafts and the like, in case of fire, which device is simple in construction, durable and reliable and effective in action. 1 I In the accompanying drawings inwhich like letters of reference indicate like parts in all the figures: Figure 1 is an elevation ofa pair of elevator doors provided with one embodiment ofmy improvement. Fig. 2 is a horizontal sectionalview on the line aa of Fig. 1. Fig. 3 is an enlarged detail. elevation of the weight, latch and guide rod.

' Fig. 4 is a horizontal view on the line b b of Fig. 3.

The doors 1 and 2 are mounted to slide vertically on guides 3, and are connected by chains and rods 4 and- 5 attached to the doors and passing over pulleys 6 so thatthe two door sections move toward each other in closing and from each other in opening. The. doors are so .weightedand balanced that when opcnedto any desireddegree they remain in position, and so that when openeda comparatively small additional load act ing'on the upper door causes it to descend and the lower door to rise until their adcontact and the door opening,

jacent edges The matter so far deis completely closed scribed is old and well known and forms no part of my present invention.

The upper door 1 is provided, at each.

lower corner with an arm7- which extends beyond the side of the door and beyond the inner edge of a vertical rail 8 which is at right angles to said arm. Adjacent to and outside of said -rail a vertical guide rod 9 extends from a bracket 10 directly beneath the pulley 6 to a bracket 11 projectingifrom the outerside of the rail 8' and on said I'od a weight 12 is mounted to slide, freely, said weight being equal to a trifle more than one half of the weight required to move the up- Specification of Letters Patent. ,Application filed May 21, 1913. Serial No. 768,948.

Patented Oct. 2'7, 1914.

per door section 1 downward and the lower door section 2 upward. If the weight required to so more the door is fiftylbs. then each weight 12 would be about twenty-five lbs. more or less. The weight 12 is provided at its upper end with an arm 13 projecting beyond the edge of the rail 8 to such a distance that it is in the path of the arm 7 projecting laterally from the corresponding lower corner of the door; this arm 13 on the .weight being above the arm 7, on the correspoiliding lower corner of the door. A vertica the rod 9 a latch The sliding weight 12 is provided with a hooked arm 17 the upper end of which can engage the latch leverl5 so that this latch can hold the weight in raised position. The hooked arm slides on the plate 14 which thus serves as a guide to prevent the weight from turning on the rod 9. The ends of the two latch levers 15 opposite the ones'on which the hooked arms 17 of the weights are suspended are connected by a wire 18 passed over suitable pulleys l9 and provided with a fusible piece 20. This wire is drawn so taut as to hold both latch levers in horizontal position, thus keeping both weights "12 raised so that they will be directly beneath the pulleys. The'doors can be opened and closed manually as usual and will not be interfered with by the weight as' this isheld higher than the arms 7 on the lower corners of the upper doors and always looked in place. The wire is preferably carried up to and below the lintel of the door opening on the loft room side but may be arranged in any other'suitable man- In case of the wire 18 melts thus releasing the latches 15 and permitting the weights 12 to drop downward on therods 9 until the arms 13 on said weights strike against the upper edges of the arms 7 on the lower corners of the upper door, thereby moving said upper door downward andthe lower door correspondingly'upward so as to close the door opening completely. Of course if the doors are closed when the fusible part of the wire melts the weights drop without any additional effect but if the doors are partly open" or entirely open the released weights, by acting on'the arm 7 on the upper doors move guide plate 14 is provided at right angles to the rail 8. At the upper end ofthe same downward thereby closing both doors.

Having described my invention what ll with and adjacent to the guide rail, a'sliding Weight on said guide rod, a latch for holding said weight raised, a fusible plug controlling said latch and a projection on the'door extending laterally beyond the door to be in the path of said weight',.substantially as set forth.

:2. The combination with an i elevator shaft door and vertical guide rails for the of brackets secured on one of said same, guide rails, a guide rod attached to said brackets, a weight mounted to slide vertically on said guide rod, a hook projecting upward from said Weight, a latch for en gagement with said hook, a fusible means for holding said latch in position and a laterally projecting part on the door extending into the path of said weight, substantially as set forth.

3. The combination with movable elevator shaft door, of vertical guide rails for the same, a vertically sliding weight adjacent one of said guide rails,

means a vertically means for guiding said weight in its vertical movement, a projecting plate on' said Weight, a projecting part extending from the door laterally into the path of said projecting plate on the weight and beneath said plate and means for holding said Weight in raised position and a fusible tially as set forth.

a, lhecombination with a Vertically movable elevator shaft door, of vertical guide rails for the same, brackets secured to one of said guide rails on its the side edge of the door, a vertical guide rod secured to said brackets, a Weight mounted to slide vertically on said projecting from the top or said weight. and projectingbeyond the edge of the guide rail and an arm on the door extending beyond the edge of the guide rail and into the path of said plate on the weight, a latch for hold-' ing the weight in raised position and a fusible device for holding the latch in place, substantially as set forth, Faigned at New York city in the county of New York and State of New York this 19th day of February, A. D. 1918.

"WALTER E. BROVTN.

Witnesses: I i

Hoe-n Pircnnu, Oscar l Gmvz.

for releasing said weight, substanface farthest from,

guide rod, a plate,

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