Status indicator system for a radio-controlled door operator

Details Status indicator system for a radio-controlled door operator Status indicator system for a radio-controlled door operator

1983-12-30

1986-04-15

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

49 14, 340686, G08B 536, G08B 2100

Patent

active

045830819

ABSTRACT:
A door operator system includes up and down limit switches actuated to the closed position when the door reaches the up and down travel limits. A processor circuit within the operator is connected to the limit switches for ascertaining the position of the door. Bias circuits apply a bias to the processor when the limit switches are open. An indicator system comprising a pair of light emitting diodes connected across respective limit switches indicates the door position. A series impedance element common to both LED circuits prevents actuation of the control circuit by the light emitting devices.

REFERENCES:
patent: 2991406 (1961-07-01), Seith et al.
patent: 3641488 (1972-02-01), Mullin
patent: 3975723 (1976-08-01), Bowling et al.
patent: 4496942 (1985-01-01), Matsuoka

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