Burglar alarm including a reed relay actuated in response to a v

Details Burglar alarm including a reed relay actuated in response to a v Burglar alarm including a reed relay actuated in response to a v

1987-12-14

1989-09-05

Pellinen, A. D.

Electricity: circuit makers and breakers

Special application

Anti-intrusion type

200 6184, 335205, 340545, H01H 302

Patent

active

048640875

ABSTRACT:
The present disclosure is directed to an improved burglar alarm which is mounted on a base having a concaved space for receiving therein a ring-like magnet with an elongated resilient arm, vibratable as a result of external force, and a magnetic switch tube actuated in response to the vibrating magnet which changes either the magnet polarity or intensity of the magnetic force thereof so to produce signals to actuate a connected alarm apparatus.

REFERENCES:
patent: 3193198 (1965-07-01), Carlson
patent: 4438430 (1984-03-01), Young et al.
patent: 4710646 (1987-12-01), Curda et al.

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