Chemically activated warning system

Details Chemically activated warning system Chemically activated warning system

G - Physics

08

B

340/143, 324/26,

G08B 21/14 (2006.01) G01N 27/416 (2006.01)

Patent

CA 1048366

Abstract of the Disclosure An electrically actuated safety alarm system for detecting the presence of toxic gases for use alone or in combination with a conventional gas filter breathing apparatus. Spaced electrodes, at least one of which is coated with a basic nitrogen-containing polymer of high electrical resistance project into an electrical conducting medium (e.g., activated charcoal) in a container and is connected in series with signaling means with an audio and/or visual signal. The coating forms electrically conductive quarternary ammonium salts in the presence of predetermined toxic gases to lower the electrical resistance of the polymer to complete the electrical circuit between electrodes through the charcoal and activate the signaling means to generate the signal. -2-

228217

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