A method, system and apparatus for powering a compressor are provided. Each field of a record may be compared by an exact match andor close matches and each comparison can result in a mathematical score which is the sum of the field comparisons. In the locked position, the lock disconnects the battery from the power supply so the emitter pin can be removed without electric current flowing. Each of the engines can be turned off or regulated to maintain an optimum operating temperature for a common heater head in communication with each of the engines.