Inertia switch for anti-intrusion sensing systems

Details Inertia switch for anti-intrusion sensing systems Inertia switch for anti-intrusion sensing systems

1975-03-03

1977-03-15

Scott, James R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6193, 335205, 340261, H01H 3514, H01H 302, G08B 1300

Patent

active

040126110

ABSTRACT:
An intrusion alarm system incorporating an inertially responsive sensor arrangement which, in one embodiment, is provided as a body of mass suspended in pendulum fashion within a compact housing. A permanent bar magnet suspended therewith operates in conjunction with a manetically actuable switch to provide highly responsive and reliable sensing. A logic circuit provides a responsive, efficient pulsating alarm at dual frequencies optimized for human recognition, and a wireless magnetic remote disarm feature is provided.

REFERENCES:
patent: 2600011 (1952-06-01), MacDonald et al.
patent: 3240891 (1966-03-01), Bergey
patent: 3249713 (1966-05-01), Briggs
patent: 3330016 (1967-07-01), Smith et al.
patent: 3364318 (1968-01-01), Bulliet
patent: 3596021 (1971-07-01), Saul
patent: 3601729 (1971-08-01), Hierta
patent: 3748415 (1973-07-01), Suzuki
IBM Technical Disclosure Bulletin, V. O. Baker et al., "Low-Restriction Magnetic Flow Detector", vol. 11, No. 5, Oct. 1968, pp. 485, 486.

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