Patent ID: 8436277

Claim:
A system comprising: an enclosure; a welding apparatus disposed inside the enclosure, the welding apparatus comprising a torch, an oxygen line configured to convey oxygen to the torch, and an acetylene line configured to convey acetylene to the torch; an oxygen tank disposed outside of the enclosure and connected to the oxygen line; an acetylene tank disposed outside of the enclosure and connected to the acetylene line; an intake blower connected to the enclosure, and configured to blow air into the enclosure; an exhaust blower connected to the enclosure, and configured to blow air out of the enclosure; a sensor array comprising at least one sensor, disposed in said enclosure, the sensor array configured to detect a first hazardous condition in said enclosure, and further configured, responsive to detecting the first hazardous condition, to assert a first sensor output signal; a first pneumatic valve connected, outside of the enclosure, to the oxygen line and configured such that actuation of the first pneumatic valve will cause a first flow of oxygen to cease in the oxygen line; a second pneumatic valve connected, outside of the enclosure, to the acetylene line and configured such that actuation of the second pneumatic valve will cause a second flow of acetylene to cease in the acetylene line; a solenoid dump valve, disposed outside of the enclosure, in fluid communication with the first pneumatic valve and the second pneumatic valve via a first pneumatic shutoff line, wherein the first pneumatic valve and the second pneumatic valve are configured to actuate upon actuation of the solenoid dump valve; and a control module, disposed outside of the enclosure, and coupled to said sensor array, the control module further connected to the solenoid dump valve via the first pneumatic shutoff line, the control module configured to receive the first sensor output signal and, responsive to receiving the first sensor output signal, cause the solenoid dump valve to pneumatically actuate.