Device for detecting momentary cutoff of AC power source
 A device for detecting a momentary cutoff of an AC power source which is used with a data processing apparatus or the like. The device determines that a momentary cutoff has occurred in the AC power source when an actual rotation speed of a motor energized by the AC power source for rotation is lower than a predetermined rotation speed. 
Ricoh Company, Ltd.
G G
G01R G01P
inventional inventional
Harumi
Takahashi