Magnetic security system responsive to predetermined persons

Details Magnetic security system responsive to predetermined persons Magnetic security system responsive to predetermined persons

1993-06-21

1994-11-29

Swann, Glenn

Communications: electrical

Condition responsive indicating system

Specific condition

49 31, 340573, 34082531, 361170, G08B 1322

Patent

active

053693949

ABSTRACT:
A security system operates in response to an attempted egress through a door by a preselected person. The magnetic field of a permanent magnet is passed in a preselected spatial relation which respected a current generating device to generate a current upon the attempted egress through the door by the preselected person carrying the permanent magnet, and a security device is energized to lock the door upon the establishment of the generated current. A method of operating a security system is also disclosed.

REFERENCES:
patent: 3564501 (1971-02-01), Flook, Jr.
patent: 4555696 (1985-11-01), Brown
patent: 4682155 (1987-09-01), Shirky
patent: 4870391 (1989-09-01), Cooper
patent: 4899134 (1990-02-01), Wheeless, Jr.
patent: 5126720 (1992-06-01), Zhou et al.

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