Abstract: A setting tool includes a housing having an initiator compartment to receive an initiator for initiating combustion of a combustible element, a combustion compartment to receive the combustible element, and a switch compartment to at least partially receive a switch circuit for activating the initiator, a piston configured to impart a setting force against the plug in response to combustion of the combustible element, and an interrupt flowpath configured to connect at least one of the combustion compartment and the initiator compartment with the switch compartment whereby combustion products that may be created in the initiator compartment or combustion compartment would be circulated from the at least one of the combustion compartment and the initiator compartment to the switch compartment to disconnect the switch circuit in response to the activation of the initiator charge.

Abstract: A light fixture including an outer ring, middle ring, and inner ring, each of which having generally a cylindrical shape. The outer ring has a flange at one end and a threaded female portion on an interior surface. The middle ring has a flange at one end and a threaded male portion on an exterior surface. When the outer ring is mated to the middle ring, the male portion is threaded into the female portion. The inner ring has a plurality of grooves on an exterior surface. The threaded male portion of the middle ring includes a plurality of openings for receiving a plurality of securing members, with each of the plurality of securing members capable of moving in each of the plurality of grooves and capable of securing the middle ring to the inner ring.