Electricity: circuit makers and breakers – Special application – Feeler moves into detecting contact with object
Patent
1979-05-30
1981-04-14
Truhe, J. V.
Electricity: circuit makers and breakers
Special application
Feeler moves into detecting contact with object
200 617, 49 27, H01H 316
Patent
active
042621763
ABSTRACT:
This invention relates to a switching arrangement for use in stopping or reversing an electrically driven roller door when an object lying in its path is struck during closing. The arrangement comprises a switch bar extending the width of the door curtain and projecting below its bottom edge, hinge mounting means securing the bar to the curtain and permitting swing movement about a horizontal axis, resilient loading means urging the bar into a rest position in which the lowermost bar surface is laterally displaced from the axis and a switch actuated by movement of the bar from its rest position.
REFERENCES:
patent: 3754176 (1973-08-01), Miller
patent: 3931911 (1976-01-01), Kohl
patent: 4115952 (1978-09-01), French
Annis-Brown, legal representative by Marie-Therese
Kapitza Wolfgang B.
Steele, deceased William H.
Byrne & Davidson Doors Pty. Limited
Moose Richard M.
Truhe J. V.
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