Abstract: A battery operated smoke detector with a system for lowering the battery of the smoke detector is disclosed. The smoke detector is of the type that is mountable from the ceiling of a structure. The battery of the smoke detector is part of a battery pack that is connected to a battery wire that is mounted on a spool. An engagement mechanism that allows the lowering of the spool and battery pack in response to a low-voltage condition controls the lowering of the battery pack. An electric motor is connected to the spool, and is used for raising the battery pack once a battery that is charged is connected to the system.

Abstract: A hand-held hair dryer and hair styling system that uses a magnetic field to index the location of a brush or combing device relative to the nozzle of the hair dryer is disclosed. The system allows the nozzle to follow the brush or combing device. The system includes a hair dryer that has a fan and a heating element, the fan forcing air over the heating element. The dryer also has a nozzle with ferrous or magnetic components, and that is supported from the body by bearings that allow rotation of the nozzle about a central axis. The system includes a brush that includes a magnet that provides a magnetic field that attracts or repels the magnetic or ferrous components of the nozzle, so that holding the hair dryer next to the comb causes the nozzle and the brush to be coupled through the magnetic field, so that the nozzle rotates or moves in response to movement of the brush.

Abstract: A hand-held hair dryer and hair styling system that uses a magnetic field to index the location of a brush or combing device relative to the nozzle of the hair dryer is disclosed. The system allows the nozzle to follow the brush or combing device. The system includes a hair dryer that has a fan and a heating element, the fan forcing air over the heating element. The dryer also has a nozzle with ferrous or magnetic components, and that is supported from the body by bearings that allow rotation of the nozzle about a central axis. The system includes a brush that includes a magnet that provides a magnetic field that attracts or repels the magnetic or ferrous components of the nozzle, so that holding the hair dryer next to the comb causes the nozzle and the brush to be coupled through the magnetic field, so that the nozzle rotates or moves in response to movement of the brush.