Piezo-electric level detector

Details Piezo-electric level detector Piezo-electric level detector

1984-02-02

1985-03-26

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310324, 310340, 310356, 73290V, 340621, H01L 4108

Patent

active

045075832

ABSTRACT:
The level detector is to be used for starting and stopping an electric system such as a pump. It comprises a piezo-electric crystal (31) squeezingly mounted between two elastically resilient membranes (22, 23) situated between two squeezing members (11, 12). These squeezing members form a top part (11) and a bottom part (12), respectively, which together form a sensor housing (10). On the outside the membranes are coated with a thin, insulating plastic layer (21, 24) and form the electric connection to the crystal. The two membranes are kept separated by means of a plurality of insulating, annular disks (25-28). In this manner a sturdy and reliable mounting of the piezo-electric crystal is obtained.

REFERENCES:
patent: 2402531 (1946-06-01), Christian
patent: 2413462 (1946-12-01), Massa
patent: 2518331 (1950-08-01), Kalin
patent: 2636134 (1953-04-01), Arons et al.
patent: 2639393 (1953-05-01), Birt et al.
patent: 2794132 (1957-05-01), Zapponi
patent: 2806966 (1957-09-01), Silver
patent: 2814741 (1957-11-01), Minnick et al.
patent: 3299301 (1967-01-01), Heilman et al.
patent: 3336573 (1967-08-01), Galloway et al.
patent: 4417170 (1983-11-01), Benincasa

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