Door activating motor control apparatus

Details Door activating motor control apparatus Door activating motor control apparatus

1977-01-25

1979-01-09

Hohauser, Herman J.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

49 28, 361192, 361189, H02P 108

Patent

active

041340507

ABSTRACT:
Improved door activating motor control apparatus employs a self latching safety edge relay which is selectively energized by any of "open", one-button universal or obstruction-sensing safety edge contacts. A motor controlling contactor switch has its "open" direction coil and contact portion operated by safety edge relay contacts, and its "close" relay portion operated under control of a "close" or the one-button switch.
The composite control apparatus of the instant invention exhibits significant operational advantages over prior art structures including, inter alia, frequency exercise of safety edge relay contacts, responsiveness to the "open" switch in an emergency situation, and retention of an obstruction sensing signal to cause door opening.

REFERENCES:
patent: 3654535 (1972-04-01), Hendry et al.

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