Abstract: A fragrance diffuser (100) comprises a housing defining a chamber (116) for holding a fragrance-emitting block (110), a heating element (112) located within the housing, a timing and indicating circuit board (114) to signal when the predicted life of the fragrance emitting block has expired, a power supply connection plug (134) for providing electrical power to the heating element and the timing and indicating board, and a keying system (234, 236, 238) incorporated in the chamber (116) and on the fragrance-emitting blocks (110). The blocks are encoded or keyed to indicate that they possess particular predefined characteristics, such that only blocks having those characteristics may be inserted. The diffuser is constructed with a downwardly-projecting housing extension (132) for the power supply connection to allow the use of an adjacent electric power outlet when the diffuser is properly installed.

Abstract: A fragrance diffuser (100) comprises a housing defining a chamber (116) for holding a fragrance-emitting block (110), a heating element (112) located within the housing, a timing and indicating circuit board (114) to signal when the predicted life of the fragrance emitting block has expired, a power supply connection plug (134) for providing electrical power to the heating element and the timing and indicating board, and a keying system (234, 236, 238) incorporated in the chamber (116) and on the fragrance-emitting blocks (110). The blocks are encoded or keyed to indicate that they possess particular predefined characteristics, such that only blocks having those characteristics may be inserted. The diffuser is constructed with a downwardly-projecting housing extension (132) for the power supply connection to allow the use of an adjacent electric power outlet when the diffuser is properly installed.

Abstract: The tool is a mechanically operated detonating device that is actuated by tension. The device is run into a hole on a slick line or tubing and latched. When a predetermined upward pull is provided on the supporting line, a firing pin is released and fires an initiator. Typical uses are perforating, cutting and setting plugs in casing, tubing and drill pipe. Additional tension thereafter applied can be used for recovering the tool or a major portion thereof from the hole, on the supporting line.

Abstract: An apparatus and controlling circuitry for periodically operating an aerosol container in discrete dispensing intervals to disperse a discrete quantity of the contents thereof. The apparatus includes a powered mechanism for actuating the aerosol, with the circuitry controlling the powered mechanism for a predetermined number of actuations. An energizing means activates a warning mechanism when the actuation count reaches the predetermined number to thereby indicate the probable total evacuation of the aerosol container and the necessity for termination of the operation. The apparatus also includes means for setting the circuitry into a plurality of different operating modes, including a continuous intermittent operation, a controlled daytime operation, and a controlled night operation. The apparatus may be battery operated, and it then includes a second warning mechanism for indicating whether the battery power is sufficient to operate the powered mechanism.