Magnetic tape sensing head demagnetizer

摘要

A magnetic tape sensing head demagnetizer disclosed has a housing with a hollow handle portion and a clear plastic probe portion projecting outwardly from the handle portion. A coil within the handle portion receives the inner end of a core which has an outer probe end that is received by the probe portion to protect it during demagnetizing of a tape sensing head as an AC voltage provides a pulsating flux to the core. A bulb received within the handle portion of the housing shines light through the probe portion thereof to provide illumination during the demagnetizing. Closing of a normally open switch energizes the coil with the AC voltage and concomitantly applies a portion of the voltage across the coil to the bulb to provide the illumination. An inner end of the probe portion is mounted by the handle portion with the probe end of the core located adjacent one lateral side edge of the probe portion and the bulb located adjacent the other side edge in a construction that gives the probe portion good light gathering and transmitting characteristics. Intensification of the transmitted light is achieved by tapering of the probe portion side edges toward each other in a direction toward the distal end of the probe portion. The handle portion of the housing has tapering side walls connected by a flat wall and a curved wall, all of which cooperate to facilitate handling of the demagnetizer and operation of the switch whose actuating button projects outwardly from the flat wall.