Measuring and testing – Gas analysis – Gas of combustion
Patent
1993-11-15
1995-08-15
Williams, Hezron E.
Measuring and testing
Gas analysis
Gas of combustion
73 3101, 73863, 901 15, 901 49, B25J 1900, H04N 710
Patent
active
054409160
ABSTRACT:
A mobile, self-powered, self-contained, and remote-controlled robot capable of safely operating in a surrounding combustible atmosphere and providing information about the atmosphere to the operator. The robot includes non-sparking and non-arcing electro-mechanical and electronic components designed to preclude igniting the combustible atmosphere, and positively pressurized enclosures that house the electro-mechanical and electronic components of the robot and prevent intrusion of the combustible atmosphere into the enclosures. The enclosures are interconnected such that a pressurized gas injected into any one of the enclosures is routed to all the other enclosures through the interconnections. It is preferred that one or more sealed internal channels through structures intervening between the enclosures be employed. Pressure transducers for detecting if the pressure within the enclosures falls below a pre-determined level are included. The robot also has a sensing device for determining the types of combustible substances in the surrounding atmosphere, as well as the concentrations of each type of substance relative to a pre-determined lower explosive limit (LEL). In addition, the sensing device can determine the percent level of oxygen present in the surrounding atmosphere.
REFERENCES:
patent: 4709265 (1987-11-01), Silverman et al.
patent: 4984745 (1991-01-01), Akeel et al.
Ohm Timothy R.
Stone Henry W.
Jones Thomas H.
Kusmiss John H.
Miller Guy M.
The United States of America as represented by the Administrator
Wiggins J. David
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