Detector supervision apparatus and method

Details Detector supervision apparatus and method Detector supervision apparatus and method

1992-05-29

1995-08-08

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340506, 340511, G08B 1314

Patent

active

054402930

ABSTRACT:
A detector supervision system usable with detectors or sensors formed with a removable head and a surface mountable base includes an energy storage device which is carried on each base. The energy storage device is either a capacitor or an inductor, and is coupled to one or more of the terminals of the base. A conducting spring member is also carried on the base, attached to one of the terminals. The spring member is in a first position when the head is attached to the base. The spring member moves to the second position in response to the head being removed from the base. Detection circuitry can detect the presence of one or more energy storage devices which are switched into communication lines between detector bases in response to one or more of the heads being removed. The detection circuitry can signal a central control panel that one or more of the heads has been removed from a respective base.

REFERENCES:
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patent: 4369435 (1983-01-01), Adachi et al.
patent: 4524349 (1985-06-01), Hyatt
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patent: 4544921 (1985-10-01), Fujisawa
patent: 4567471 (1986-01-01), Acar
patent: 4716401 (1987-12-01), Wohlford et al.
patent: 4829283 (1989-05-01), Spang et al.
patent: 4833451 (1989-05-01), Lehmann et al.

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