Device for establishing and/or monitoring a predetermined fillin

Details Device for establishing and/or monitoring a predetermined fillin Device for establishing and/or monitoring a predetermined fillin

1996-05-01

1998-09-29

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340618, 340621, 73290V, 73290R, 310323, 310324, 200 83A, 200 83, 200190, G08B 2100

Patent

active

058150790

ABSTRACT:
A description is given of a sturdy device for establishing and/or monitoring a predetermined filling level in a container, which device exhibits a housing (1), two oscillating rods (3, 4) projecting into the container, a first diaphragm (2) which is fixedly clamped, at its border, into the housing (1), a second diaphragm (6, 6') which is arranged parallel to said first diaphragm in the interior of the housing (1), a piezoelectric element (7, 7') which is arranged on the second diaphragm (6, 6') and is intended for receiving and converting oscillations into an electric output signal and for inducing bending oscillations in the second diaphragm (6, 6'), and in the case of which device the mode of oscillation produced by the piezoelectric element (7, 7') corresponds to the mode of oscillation utilized for inducing oscillation in the oscillating rods (3, 4).

REFERENCES:
patent: 3719939 (1973-03-01), Gell et al.
patent: 4896536 (1990-01-01), Benz
patent: 5625343 (1997-04-01), Rottmar

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