Abstract: A gravity sensing disc slide interrupter in combination with dual chambered etonating booster charges is used to automatically select one of a plurality of mine covers to be removed from a randomly ground oriented mine in order to insure maximum leathality against a target. Reliable selection of the mine cover to be explosively removed is accomplished by reduction of gap distance between the output side of a transfer lead charge and the input side of detonating fuze booster charges.

Abstract: A cutting torch arrangement is disclosed, including a thermal bar having a metal burner pipe with rod-like metal elements therein and gas passageways formed between these elements. A shroud/ shield is disposed around the thermal bar, with an open shroud/shield end laterally spaced from the thermal bar. A spring-biased feeder assembly and shroud/shield biasing assembly is provided for yieldably urging the thermal bar forward within the shroud/shield and for retaining the shroud/shield against a target. A cluster arrangment of thermal bars is also provided.

Abstract: A cutting torch arrangement is disclosed, including a thermal bar having a metal burner pipe with rod-like metal elements therein and gas passageways formed between these elements. A shroud/shield is disposed around the thermal bar, with an open shroud/shield end laterally spaced from the thermal bar. A spring-biased feeder assembly and shroud/shield biasing assembly is provided for yieldably urging the thermal bar forward within the shroud/shield and for retaining the shroud/shield against a target. A cluster arrangement of thermal bars is also provided.