Abstract: A circuit is disclosed for disconnecting electrical power upon the detection of an elevated temperature comprising an electrical plug and an electrical receptacle interconnected by a power cable. An interruption circuit having a disconnect switch is interposed in the power cable. A plug heat sensitive device and a receptacle heat sensitive device monitor the temperature of the electrical plug and the electrical receptacle. An elevated temperature detection circuit opens the disconnect switch upon the detection of an elevated temperature in one of the electrical plug and the electrical receptacle to prevent an overheated condition.

Abstract: A fiberglass sucker rod construction is disclosed comprising a cylindrical fiberglass rod having a steel connector member adhesively bonded to each end thereof. The steel connector members are basically identical in their manner of being affixed to each end of the fiberglass rod, each connector member having an internal receptacle defining a series of tapered annular spaces for receiving an epoxy adhesive material which bonds the fiberglass rod in the metal connector member, thereby forming a unitary sucker rod having a male thread connector at one end and a mating female connector at the other end thereof. The epoxy adhesive cures, forming a sleeve having a series of annular tapering surfaces defining annular wedges that are oriented such that tension applied to the rod causes the wedges to be compressed between the rod and connector member, resulting in a radially inwardly directed force to retain the rod in position against such tension.