Electrosensing edge for door

Details Electrosensing edge for door Electrosensing edge for door

1998-08-14

1999-10-12

Redman, Jerry

Movable or removable closures

Safety means responsive to obstruction to closure

Sensing shoe on leading edge

E05F 1502

Patent

active

059640588

ABSTRACT:
An electrosensing edge which automatically reverses the downward closing movement of a door such as a garage door when a sealing member and the electrosensing edge encounter an obstruction. The electrosensing edge is characterized by an elecricial cable which extends between two insulators located at each end of a metal bracket mounted on the leading edge of the door, inside the sealing member suspended from the bracket. The cable acts as a witch which is normally open, but is closed if the cable is forced against the bracket to ground the electrical circuit as the sealing member and cable strike the obstruction. Grounding of the cable trips a relay and causes the door actuator to immediately reverse downward movement of the door without injury or damage to the obstruction.

REFERENCES:
patent: 2135131 (1938-11-01), Bassett
patent: 3352059 (1967-11-01), Metz
patent: 5079417 (1992-01-01), Strand
patent: 5259143 (1993-11-01), Mitchell
patent: 5260529 (1993-11-01), Miller
patent: 5262603 (1993-11-01), Miller
patent: 5327680 (1994-07-01), Miller
patent: 5384982 (1995-01-01), Galperin
patent: 5438798 (1995-08-01), Plamper
patent: 5481076 (1996-01-01), Mullet
patent: 5589811 (1996-12-01), Pariot
patent: 5602370 (1997-02-01), Kau

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