Method and apparatus for remotely reversing electromechanical do

Details Method and apparatus for remotely reversing electromechanical do Method and apparatus for remotely reversing electromechanical do

1989-06-21

1990-05-08

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

318266, 318286, G05D 300

Patent

active

049241591

ABSTRACT:
An obstruction sensing door reverser attachable to an existing electromechanically operated door opener having existing current carrying stop and open loops; having at least one external obstruction switch disposed in a current carrying loop communicating the presence of the obstruction to the door reverser for stopping movement of the door and further more initiating and holding an open signal on the door operator open loop for predetermined period of time to open the door.

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patent: 4274227 (1981-06-01), Toenjes
patent: 4376971 (1983-03-01), Landgraf
patent: 4701684 (1987-10-01), Seidel et al.

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