Patent US4002270 - Vibratory feeder system - Google Patents
Jan 11, 1977 . A vibratory feeder system is disclosed which employs control . Whereas a permanent magnet is employed in the preferred embodiment, a magnetic field produced by a DC ... US3468456 *, May 19, 1967, Sep 23, 1969, Jeffrey Galion Inc . system with adjustable electro-viscoelastic suspension device.