US 4,129,187 AGranted

Electro-mechanical vibrator

AssigneeSun Chemical Corporation

InventorsMichael Wengryn, Alexander Khazan

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Abstract

A mechanical vibrator or tapper is shown in which a high intensity permanent magnet armature moves within the field of a coil of wire wound about the magnet. The magnet is guided for reciprocal motion within a spool containing the winding and strikes impact pads at opposite ends of the central spool opening. The magnet consists of two permanent magnets bonded to one another with like poles facing one another and is freely movable within the spool opening and is guided therein. A permanent magnet is fixed at one end of the spool opening and forces the permanent magnet assembly to reverse its motion after the magnet field of the winding drives the armature magnet against the impact pad at that end of the spool opening, and the magnetic field of the coil goes to zero. An oscillator circuit for driving the system is contained on printed circuit boards mounted within the housing which encloses the vibrator structure. The housing is crimped together in its final assembly.

Claims11

Dependent claims

An electro-mechanical vibrator for decreasing the friction of a mechanical movement comprising, in combination:

a non-magnetic support spool having a central axial opening;
a winding wound around said spool;
first and second permanent magnets disposed within said central axial opening and being closely fitted within said opening to be freely movable therein and being guided by said central opening, said first and second permanent magnets being permanently magnetized in the direction of the axis of said central axial opening and being held together with like poles facing one another;
said central axial opening having an axial length which is greater than the combined axial length of said first and second permanent magnets;
impact means disposed at at least one of the opposite ends of said central axial opening, the free end of said first permanent magnet being movable to a position to strike the surface of said impact means to induce a mechanical shock;
electrical circuit means connected to said winding to cause current flow therein which causes said first and second permanent magnets to move at least toward said impact means and toward a first of said opposite ends of said central opening;
and return means connected in said central opening for causing said first and second permanent magnets to move away from said first end of said central opening and toward the opposite end of said central opening, after said first permanent magnet strikes said impact means.

4 more elements

Dependencies are inferred from the claim text.