Security timer for automatic garage door opener

Details Security timer for automatic garage door opener Security timer for automatic garage door opener

1982-12-20

1984-07-31

Rubinson, G. Z.

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318285, 318467, H02P 104

Patent

active

044632924

ABSTRACT:
A security timer for a powered overhead garage door causes the garage door to close after it has been opened for a selected time interval. The security timer includes an oscillator that provides pulses. A counter counts the pulses and provides a binary output. A timer switch is engaged by the door when the door is fully open. Engagement of the timer switch signals the oscillator and counter to begin. When the desired number of pulses has been counted, a relay switch is closed for signaling the operator unit of the door to close the door.

REFERENCES:
patent: 4035702 (1977-07-01), Pettersen et al.
patent: 4364003 (1982-12-01), Phipps

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