217588 ⎘
Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the frequency of operation is determined by the frequency of uninterrupted AC energisation with DC energisation superimposed on AC energisation
Vibration motor and mobile communication device using same
#2Electromagnetic actuator for active vibration isolation system
#3Variable Laser Beam Focus
#4Method and apparatus for making and using 1D and 2D magnetic actuators