Electromechanical translation device comprising an electrostrict

Details Electromechanical translation device comprising an electrostrict Electromechanical translation device comprising an electrostrict

1984-10-19

1986-02-11

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310369, H01L 4108

Patent

active

045700966

ABSTRACT:
In a device of the type of an Inchworm Translator as called by Burleigh Instruments, Inc., N.Y., an electromechanical driver for a shaft of the device comprises a plurality of electrostrictive layers stacked longitudinally of the driver with internal electrodes interposed. Preferably, each gripper or clamper for the shaft is of a like structure and comprises a pair of external electrodes on an outer peripheral surface thereof. More preferably, the gripper comprises either an electrically insulating and abrasion resistive or an electrically insulating and vibration damping film which defines a cylindrical inner peripheral surface of the gripper. The film is preferably divided into a plurality of film portions. The electrostrictive layers are preferably of a composition of a formula of (1-x)Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3.xPbTiO.sub.3 where x is about 0.35. The electrically insulating and abrasion resistive film may be of either a plastic or a ceramic material. The electrically insulating and vibration damping film may be of a ferrite composition having a logarithmic damping factor between 0.04 and 0.06.

REFERENCES:
patent: 3902084 (1975-08-01), May, Jr.
patent: 3902085 (1975-08-01), Bizzigotti
patent: 4219755 (1980-08-01), O'Neill et al.
patent: 4454441 (1984-06-01), Taniguchi

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