Portable hazard warning apparatus
First Claim
1. Portable electrically operable apparatus for monitoring and for giving warning of the presence of a predetermined environmental hazard in the neighborhood of the apparatus, said apparatus comprising:
- a portable housing;
an electrical power source arranged in the housing;
a first monitoring unit arranged in the housing and including at least one detector for responding to the presence of a predetermined environmental hazard;
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 which is connected to the first monitoring unit and to the second monitoring unit, the indicator arrangement being operable to provide a warning indication upon the detection of a predetermined hazard by the first monitoring unit or upon fault detection by the second monitoring unit; and
a safe-operation indicator arrangement provided on the housing and connected to the first monitoring unit and to the second monitoring unit, and operable to provide a safe-operation indication in the absence of hazard detection or fault detection by the first and second monitoring units respectively.
1 Assignment
0 Petitions
Accused Products
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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Citations
7 Claims
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1. Portable electrically operable apparatus for monitoring and for giving warning of the presence of a predetermined environmental hazard in the neighborhood of the apparatus, said apparatus comprising:
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a portable housing; an electrical power source arranged in the housing; a first monitoring unit arranged in the housing and including at least one detector for responding to the presence of a predetermined environmental hazard; 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 which is connected to the first monitoring unit and to the second monitoring unit, the indicator arrangement being operable to provide a warning indication upon the detection of a predetermined hazard by the first monitoring unit or upon fault detection by the second monitoring unit; and a safe-operation indicator arrangement provided on the housing and connected to the first monitoring unit and to the second monitoring unit, and operable to provide a safe-operation indication in the absence of hazard detection or fault detection by the first and second monitoring units respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification