Portable hazard warning apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 26, 1987
Grant Date -
N/A
app pub date -
Aug 28, 1984
filing date -
Sep 7, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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