Portable hazard warning apparatus

Details Portable hazard warning apparatus Portable hazard warning apparatus

1984-08-28

1987-05-26

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340500, 340517, 340632, G08B 1900

Patent

active

046689400

ABSTRACT:
Portable electrically operable apparatus for monitoring and for giving warning of the presence of a predetermined environmental hazard in the neighbourhood of the apparatus and which comprises a portable housing, an electrical power source arranged in the housing, a first monitoring unit arranged in the housing and operable to detect the presence of a predetermined environmental hazard e.g. radiation or undesired gases, a second monitoring unit arranged in the housing to monitor the operation of the apparatus for fault detection, a warning indicator arrangement provided on the housing and operated by the first or the second monitoring unit so as to provide a warning indication upon the detection of a predetermined hazard or upon fault detection, and a safe-operation indicator arrangement provided on the housing and connected to the first and second monitoring units so as to provide a safe-operation indication in the absence of hazard detection or fault detection.

REFERENCES:
patent: 4088986 (1978-05-01), Boucher
patent: 4204201 (1980-05-01), Williams et al.
patent: 4319229 (1982-03-01), Kirkor
patent: 4390869 (1983-06-01), Christen et al.

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