Audible tester for alarm circuits

Details Audible tester for alarm circuits Audible tester for alarm circuits

1977-09-19

1979-08-07

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 62, 340384E, G01R 3102

Patent

active

041639367

ABSTRACT:
A device for detecting faults in an enclosed loop burglar alarm circuit wherein changes in resistance caused by faults result in a change in pitch of an otherwise low, continuous audible tone.

REFERENCES:
patent: 3284707 (1966-11-01), Clinton
patent: 3551796 (1970-12-01), Holder et al.
patent: 3689832 (1972-09-01), Leto et al.
patent: 3758855 (1973-09-01), Meyer
patent: 3870034 (1975-03-01), James
patent: 3901214 (1975-08-01), Taaffe

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