Heating method, means and control

Claim 1

A HEATING SYSTEM HAVING A WALLED COMBUSTION CHAMBER AND A CONDUIT LEADING THEREFROM WHICH COMPRISES THEREIN AN AREA TO BE HEATED TO TEMPERATURES WHICH EMIT INFRA RED RAYS, A BURNER FOR BURNING A COMBUSTIBLE FUEL MIXTURE WHICH IS DISPOSED TO DIRECT A FLAME INTO THE COMBUSTION CHAMBER; A MIXING CHAMBER DISPOSED TO DELIVER SAID COMBUSTION FUEL MIXTURE TO SAID BURNER; A VARIABLE PRESSURE CHAMBER; SAID COMBUSTION CHAMBER, CONDUIT, BURNER, VARIABLE PRESSURE CHAMBER AND MIXING CHAMBER BEING LOCATED WITHIN THE SPACE TO BE HEATED BY THE SYSTEM; A THERMOSTATIC CONTROL DEVICE; EXHAUST MEANS RESPONSIVE TO SAID THERMOSTATIC CONTROL DEVICE FOR EXHAUSTING COMBUSTION GASES FROM THE SYSTEM AND CREATING A PREDETERMINED SUB-ATMOSPHERIC AND CONSTANT PRESSURE IN THE CONDUIT, COMBUSTION CHAMBER AND MIXING CHAMBER WHEN A PREDETERMINED LOW TEMPERATURE IS REACHED IN THE SPACE TO BE HEATED; MEANS FOR PERMITTING ATMOSPHERIC PRESSURE TO BE RE-ESTABLISHED IN SAID CHAMBERS AND CONDUIT WHEN A PREDETERMINED HIGH TEMPERATURE IS REACHED IN SAID SPACE; PILOT FLAME MEANS FOR IGNITING A COMBUSTIBLE FLUID FUEL SUPPLIED TO SAID BURNER; SAID PILOT FLAME MEANS HAVING A NORMALLY CLOSED VALVE-CONTROLLED PILOT-FUEL PASSAGE FOR SUPPLYING A COMBUSTIBLE FLUID FUEL TO THE PILOT FLAME WHEN A PREDETERMINED SUB-ATMOSPHERIC PRESSURE IS ESTABLISHED IN SAID COMBUSTION CHAMBER; A BURNER ASSEMBLY COMPRISING A BURNER; A VARIABLE PRESSURE CHAMBER HAVING A WALL COMPRISING A PLIANT DIAPHRAGM; A NORMALLY CLOSED VALVE-CONTROLLED PASSAGE FOR SUPPLYING A COMBUSTIBLE FUEL MIXTURE