Movable or removable closures – Safety means responsive to obstruction to closure – Sensing shoe on leading edge
Patent
1980-04-04
1981-11-24
Kannan, Philip C.
Movable or removable closures
Safety means responsive to obstruction to closure
Sensing shoe on leading edge
200 6143, 200153F, 200161, E05F 1500
Patent
active
043016219
ABSTRACT:
Anti-closing device for use with automatically opening and closing doors or the like, having a reversing switch for the door drive and a flexible rope for actuating the switch, the rope being held vertically along the free edge of the door in spaced relation and resiliently tensioned under spring action. One end of the rope is operatively connected to the switch for actuating the switch upon a deflection of the rope. A plurality of sleeves are arranged in a vertical row on the flexible rope and the lower end of the rope is connected to the lowermost sleeve while the uppermost sleeve bears against a support secured to the door whereby the sleeves are pressed against one another by the tensioning of the rope. The end surfaces of the sleeves which face one another bear tightly against each other in the position of rest and have a substantially larger outside diameter than the flexible rope.
REFERENCES:
patent: 2135131 (1938-11-01), Bassett
patent: 3330923 (1967-07-01), Brockmeyer et al.
patent: 3352059 (1967-11-01), Metz
Gebr. Bode & Co.
Kannan Philip C.
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