Pressure actuated sensor switch with bobbin, trip cord and breakwire

A gas pressure actuated sensor which comprises:

• a tubularly shaped housing having a forward end and a rear end, said forward end having a peripherally disposed inwardly protruding annular groove therein;
• bobbin means biasedly disposed in said housing for deploying a personnel actuated trip line;
• breakwire-disturbance sensitive means for detecting movement of said trip line by personnel after deployment of said bobbin means;
• a release-lock gas pressure sensitive means operatively positioned in said housing intermediate the forward end of said housing and said inwardly protruding annular groove, for releasing said bobbin means upon an increase of gas pressure, for locking said breakwire means during a first interval of time and releasing said breakwire means after said first interval of time so that said breakwire is responsive to movement of said trip line, which includes;
• a cup shaped member having an integral tubular section which has a plurality of peripherally disposed inner detent holes, a flange exterior wall having a plurality of peripherally disposed outer detent holes, and an annular sliding groove disposed intermediate the interior wall surface of said flanged exterior wall and the exterior wall surface of said tubular section;
• a cover plate disposed in said housing having a gas inlet port integral therewith;
• a ring camming member slidably and biasedly positioned in said cup member annular sliding groove, said ring member having an inner annular camming surface, an outer annular camming surface thereon and a spring groove on one end;
• a circularly shaped diaphragm disposed intermediate said cover plate and said cup shaped member, said diaphragm operatively moving said ring camming member in response to gas being introduced into said inlet port;
• a helical release ring spring biasedly positioned intermediate said ring camming member and said cup shaped member;
• a plurality of inner detent balls disposed in said inner detent holes of said cup shaped member tubular section adjacent said inner annular camming surface of said ring camming member;
• a plurality of outer detent balls disposed in the outer detent holes of said cup shaped member tubular section intermediate said outer camming surface of said ring member and said housing.