Anti-theft vibration detector switch and system

Details Anti-theft vibration detector switch and system Anti-theft vibration detector switch and system

1981-10-19

1984-05-22

Swann, III, Glen R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

340566, 340571, 340683, 340 65, 200 6152, H01H 3502

Patent

active

044503261

ABSTRACT:
In a preferred embodiment, a steel ball having a surface coating of gold is magnetically held against each of negative and positive electrical switch contacts within a fenced-in space substantially filled with silicone fluid, the electrical switch contacts being alternately arranged in a circular series and being connected to a logic cell and mechanism adapted to count pulses resulting from each of breaking and making electrical contacts when the ball is jolted by vibration and to reset if at-least two consecutive pulses do not occur within half a second, and to send an alarm signal to a transmitter that transmits an alarm signal to a radio receiver, magnetic force lines being provided by a pole of a large bar magnet positioned behind the electrical switch contacts and a like-charge repelling-pole of a smaller bar magnet in front of and spaced-from the electrical switch contacts and ball.

REFERENCES:
patent: 3270159 (1966-08-01), Soos
patent: 3372253 (1968-03-01), Baker et al.
patent: 3482066 (1969-12-01), Zuehlke
patent: 3619524 (1971-11-01), Gillund
patent: 3742478 (1973-06-01), Johnson
patent: 3748415 (1973-07-01), Suzuki
patent: 4009662 (1977-03-01), Riparbelli
patent: 4168410 (1979-09-01), Norris
patent: 4196429 (1980-04-01), Davis

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