Safety apparatus for stopping gas leakages

Abstract From the Canadian patent

A safety and warning apparatus for detecting gas leakages in private and work premises, is disclosed in which the improve-, ment consists in providing an explosion chamber in which a miniature deflagration is caused to occur in a chamber in which ambient air is supplemented with a specific gas rate of flow; The miniature explosion chamber is connected to an overlying pilot flame chamber so that as soon as the miniature blowup occurs, the pilot flame is blown out and a temperature sensing means is capable of commanding the gas cutoff the energization, of an alarm signal, or both.