Process for depositing cobalt ondes on a refractory-coated plati

Details Process for depositing cobalt ondes on a refractory-coated plati Process for depositing cobalt ondes on a refractory-coated plati

1980-04-21

1982-02-16

Shine, W. J.

Coating processes

Electrical product produced

Welding electrode

427116, 4271266, B05D 314

Patent

active

043159567

ABSTRACT:
An improvement is provided in a portable gas detector used to detect combustible gases, such as methane, which embodies a Wheatstone bridge circuit including a refractory-coated detector element having thereon a catalyst for promoting oxidation of the combustible gas to be detected constituting one leg of the bridge and a refractory-coated reference element constituting a second leg of the bridge. The improvement consists in the application of a cobalt oxide coating to the reference element, whereby the occurrence of spurious signals by the Wheatstone bridge circuit due to causes other than the presence of a combustible gas is greatly reduced, if not completely eliminated.

REFERENCES:
patent: 4045177 (1977-08-01), McNally
patent: 4072467 (1978-02-01), Jones
patent: 4125449 (1978-11-01), Lewis et al.

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