RESONANCE VIBRATOR Russian patent published in 2002 - IPC

FIELD: vibration technique and technology. SUBSTANCE: device has rigid body, inert mass movable relative to body, mechanical spring mounted between them and intermittent force source for excitation of vibrations. Device is also provided with two additional electromagnetic performing function of magnetic spring at controllable tension. Second electromagnet is made in form of two cylindrical coaxial magnetic circuits with gap between mating surfaces. One magnetic circuit is rigidly connected to body and other magnetic circuit is connected to inert mass. Slot having width "a" is made in center of height H₁ of mating surfaces of first magnetic circuit; this slot forms two poles having width "b" exceeding maximum magnitude of relative displacement magnetic circuits in axial direction. EFFECT: extended application of resonance vibrators at adjustable frequency of natural oscillations. 3 cl, 6 dwg