| 摘要 |
PCT No. PCT/JP90/00685 Sec. 371 Date Jan. 23, 1991 Sec. 102(e) Date Jan. 23, 1991 PCT Filed May 28, 1990 PCT Pub. No. WO90/15004 PCT Pub. Date Dec. 13, 1990.An electromagnetic feeder comprises a movable core secured to one mass of two masses connected by a resilient member, two fixed cores secured to the other mass so that said fixed cores are positioned on opposite sides of said movable core, two exciting coils wound about said two fixed cores, and a control circuit for alternately applying a phase-controlled current to said exciting coils, the mass to which said movable core is secured being connected to the object to be vibrated.
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