Piezoelectric transducer

Details Piezoelectric transducer Piezoelectric transducer

1986-10-06

1988-02-16

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, H01L 4108

Patent

active

047257539

ABSTRACT:
A piezoelectric transducer for use in precision remote movement of an object in an ultra-high vacuum environment is disclosed which includes an elongated central shaft with proximal end and distal end, a distal stop fixed to the distal end of the shaft with connection means for connecting the distal stop to the object to be moved, a plurality of piezoelectric disks entrained on the shaft, a plurality of electrically conductive plates entrained on the shaft and arranged interspersed alternately with the piezoelectric disks, each plate including an annular portion entrained on the shaft and an arm extending radially outward from the annular portion. The plates are arranged into two groups with each alternate plate being in the alternate group, so that all of the plates of each group have their arms extending radially in parallel. The piezoelectric transducer also includes an electrically conductive stud with each of the groups of plates, each stud electrically and mechanically joining the arms of all of the plates in the group so that a potential applied across the two studs is imposed on the piezoelectric disks. Additionally, the piezoelectric transducer includes a pair of insulators which are entrained on the shaft adjacent to the electrically conductive plates which are outermost on the shaft.

REFERENCES:
patent: 3461910 (1969-08-01), Selsam et al.
patent: 4438364 (1984-03-01), Morison
patent: 4460842 (1984-07-01), Waanders et al.
patent: 4488080 (1984-12-01), Baumann
patent: 4651046 (1987-03-01), Ohya et al.
UHV Piezoelectric Translator, by T. Oversluizen & G. Watson, paper submitted @ 1985, Synchrotron Radiation Instrumentation Conference, Stanford, CA., Jul. 29-Aug. 2, 1985, (10 pages).

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