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US 5,633,778 AGranted
Infrared signal interface for use with barrier door operator
AssigneeThe Chamberlain Group, Inc.
InventorsJames S. Chang, Russell L. Powers
Life of this patent
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Abstract
An infrared signal interface enables an infrared detector module to communicate with the door edge signal input of a garage door operator. The infrared signal interface has a power supply for driving the pulsed infrared detector. Pulsed signals are received by a missing pulse detector that controls a relay. The relay may be coupled to the door edge signal of the garage door operator.
Claims6
An infrared signal interface for translating infrared signals from an infrared obstacle detector into an edge detector obstacle signal for a barrier door operator having edge detector leads, comprising:
- means for providing power to the infrared obstacle detector;
- means for receiving pulsed infrared signals indicative of both proper functioning of the infrared obstacle detector and detection of no obstacle by the infrared obstacle detector;
- timer means responsive to said infrared signal pulses for providing a missing pulse output signal when said infrared signal pulses are absent for a predetermined time;
- and
- circuit closure means responsive to said missing pulse output signal for closing a current path between the edge detector leads of the barrier door operator.
2 more elements
Dependencies are inferred from the claim text.