Piezoelectric pressure indicator

Details Piezoelectric pressure indicator Piezoelectric pressure indicator

1984-10-16

1986-08-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

046045449

ABSTRACT:
In a piezoelectric pressure indicator comprising a casing, a pressure receiving member at the bottom of the casing, piezoelectric elements mounted on the pressure receiving member, an acceleration compensating weight and acceleration compensating piezoelectric elements, both piezoelectric elements being connected such that the voltage produced thereby cancel with each other, thereby compensating for an effect of acceleration, an uppermost acceleration compensating element is formed with a perforation, and a lead wire for deriving the voltage is connected to the electrode of a lower imperforate acceleration compensating piezoelectric element to extend through the perforation of the imperforated element. In a modification, the pressure receiving member is covered by a heat resistant protective layer made of ceramic.

REFERENCES:
patent: 3281612 (1966-10-01), Hatschek
patent: 3349259 (1967-10-01), Kistler
patent: 3495102 (1970-02-01), List et al.
patent: 3602744 (1969-06-01), Hugli
patent: 3857287 (1974-12-01), Sonderegger et al.
patent: 4507583 (1985-03-01), Jensen et al.

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