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Yat S Chan, Anthony D S Tantram, Bryan S Hobbs, John R Finbow: Gas sensor. Coal, Stevens Davis Miller & Mosher, September 27, 1983: US04406770 (52 worldwide citation)

A gas sensor cell assembly has planar electrodes separated by a planar hydrophilic wick which extends through the electrode into an electrolyte expansion chamber where it contacts an electrolyte. The cell is extremely compact and operates in all orientations.


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Anthony D S Tantram, Bryan S Hobbs, John R Finbow, Yat S Chan: Gas sensor. City Technology, Sughrue Mion Zinn Macpeak & Seas, October 2, 1984: US04474648 (26 worldwide citation)

An electro-chemical cell for quantitatively detecting an acidic or an alkaline gas, e.g. carbon dioxide, includes a sensing electrode 9 which is connected to a top cap 12 by a contact strip 8 and is accessible to the gas to be tested through a hole 13. The electrode 9 comprises an electro-chemical c ...


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Bryan S Hobbs, John R Finbow, Leonard S Raymond, David A Rohrbacker: Gas sensor and sensing device. Pima Sensors, Lee Mann Smith McWilliams Sweeney & Ohlson, June 4, 1996: US05522980 (14 worldwide citation)

A gas sensor comprises a substrate on which are mounted three cells. Each cell includes an interdigitated capacitor defined by a pair of comb structure, electrically conductive tracks with the fingers of the combs interleaved. The tracks of each capacitor are covered by an insulating and chemically ...


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Bryan S Hobbs, Yat S Chan: Gas sensor. City Technology, Lee Mann Smith McWilliams Sweeney & Ohlson, August 10, 1993: US05234567 (14 worldwide citation)

An electrochemical gas sensor for sensing an alkaline gas such as ammonia. The sensor comprises at least sensing and counter electrodes provided in a cell containing an aqueous electrolyte, the cell further including a diffusion barrier to restrict the access of gas to the cell, and a chemical speci ...


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Bryan S Hobbs, Yat S Chan: Gas diffusion control assembly. The Governor and Company of the Bank of Scotland, Lee Mann Smith McWilliams Sweeney & Ohlson, June 21, 1994: US05321971 (5 worldwide citation)

A gas diffusion control assembly comprises a gas inlet; a restriction to the rate of flow of gas or vapor from the gas inlet in the form of a porous diffusion barrier extending across the gas inlet; and a polythene disc for causing all gas or vapor passing out of the inlet into the diffusion barrier ...


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Constantine D Capetanopolous, Patrick J Iannotta, Bryan S Hobbs, John R Finbow: Gas sensing assembly. SEM Corporation, Lee Mann Smith McWilliams Sweeney & Ohlson, April 29, 1997: US05624641 (4 worldwide citation)

A gas sensing assembly from which a number of gas sensing devices can be constructed for determining the concentration of an active gas in a gas mixture. The assembly comprises a self-contained sensing unit including a sensing element at which active gas reacts and is consumed, an output signal bein ...


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