Test apparatus

Claim 1

APPARATUS FOR DETERMINING THE PRESENCE OF AN EXPLOSIVE GASEOUS MIXTURE WHICH COMPRISES, IN COMBINATION, MEANS DEFINING A REACTION CHAMBER, MEANS FOR SUPPLYING THE GAS TO BE TESTED TO SAID CHAMBER, CONTACTS IN END SPACED-APART RELATIONSHIP IN AN ELECTRICAL CIRCUIT INCLUDING MEANS FOR SOUNDING AN ALARM WHEN THE CIRCUIT IS MADE BETWEEN SAID CONTACTS, MEANS DEFINING A FIRST CONFINED CHAMBER ENCLOSING THE SPACED-APART ENDS OF SAID CONTACTS, MEANS DEFINING A SECOND CONFINED CHAMBER FOR CONTAINING AN ELECTROLYTE IN FLUID-COMMUNICATING RELATIONSHIP WITH SAID FIRST CONFINED CHAMBER, FIRST CONDUIT MEANS CONNECTING THE LOWER END OF SAID REACTION CHAMBER WITH THE LOWER END OF SAID SECOND CONFINED CHAMBER AND SECOND CONDUIT MEANS CONNECTING THE UPPER END OF SAID REACTION CHAMBER WITH ONE OF SAID CONFINED CHAMBERS TO BRING THE GASES PRODUCED IN SAID REACTION CHAMBER TO ACT UPON SAID ELECTROLYTE TO VARY THE LEVEL OF SAID ELECTROLYTE IN SAID FIRST CONFINED ZONE ENCLOSING THE ENDS OF SAID CONTACTS, AND A GAS FLOW CONTROL MEANS COMMUNICATING WITH SAID REACTION CHAMBER FOR REGULATING THE VOLUME OF GASEOUS MIXTURE SUPPLIED TO SAID CHAMBER, SAID FIRST CONDUIT MEANS INCLUDING A U-TUBE AND SAID FLOW CONTROL MEANS INCLUDING A LIQUID CONTAINER DISPOSED BELOW SAID REACTION CHAMBER, MEANS PROVIDING A CONSTANT LIQUID LEVEL IN SAID CONTAINER, TUBE MEANS EXTENDING INTO SAID CONTAINER BELOW THE LIQUID LEVEL THEREIN AND EXTENDING UPWARDLY INTO SAID REACTION ZONE, CONDUIT MEANS FOR CARRYING THE GAS TO BE TESTED, SAID LAST-NAMED CONDUIT MEANS COMMUNICATING WITH SAID CONTAINER, AND SAID MEANS FOR SUPPLYING GAS TO BE TESTED TO SAID REACTION CHAMBER COMPRISING A CONDUIT OF REDUCED DIAMETER BRANCHING FROM SAID LAST-NAMED CONDUIT MEANS AND EXTENDING INTO SAID TUBE MEANS.