Electromagnetic positioning device with piezo-electric control

Details Electromagnetic positioning device with piezo-electric control Electromagnetic positioning device with piezo-electric control

1981-06-17

1983-05-03

Budd, Mark O.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Combined with diverse-type art device

310328, 310 19, 335258, H01L 4108, H01F 708

Patent

active

043822436

ABSTRACT:
A piezo-electric control device is used to restrain movement of the armature of an electromagnet until the current through the exciter winding of the electromagnet has reached almost the maximum value. This causes the force applied to the armature to be the maximum force from the start of movement, so that the overall time required for movement of the armature from its starting to its end position is substantially decreased. Specifically, the piezo-electric control device is a column of discs having an axis perpendicular to the axis of movement of the armature. When electrical energy is applied to the column it expands in the axial direction causing a locking member mounted on its end to engage a stop member which is part of the armature. The locking member can either push the stop member against a further rigid stop or two columns can be used to clamp the stop member between them.

REFERENCES:
patent: 3249823 (1966-05-01), Beardow
patent: 3363139 (1968-01-01), Schiavone
patent: 3462939 (1969-08-01), Tanaka et al.
patent: 3541849 (1970-11-01), Corbett
patent: 3665353 (1972-05-01), Campbell

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