Security system for roll down doors

Details Security system for roll down doors Security system for roll down doors

1997-03-21

2000-04-11

Gaffin, Jeffrey

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

70278, H01H 4702

Patent

active

060494484

ABSTRACT:
A security system with a driver circuit for energizing a solenoid actuated locking device. The circuit can include a microprocessor, a battery power supply, a boosting circuit and an energy storage circuit. The battery voltage can be stepped up by the boosting circuit and the stepped up voltage can be stored in the energy storage circuit. A solenoid driver circuit including a plurality of transistors arranged in an H-bridge configuration supply energy from the storage circuit to the solenoid under control of the microprocessor. The security system can be retrofited or is factory installable, and is particularly adapted for roll down doors and enclosures.

REFERENCES:
patent: 3933382 (1976-01-01), Counts et al.
patent: 4013930 (1977-03-01), Geller
patent: 4083424 (1978-04-01), Stemmen et al.
patent: 4161870 (1979-07-01), Barnes
patent: 5268811 (1993-12-01), Maeda
patent: 5388435 (1995-02-01), Bailey
patent: 5490031 (1996-02-01), Braun et al.
patent: 5532521 (1996-07-01), Leininger
patent: 5781399 (1998-07-01), Lanigan et al.

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