Capacitance type material level detector for hoppers

Details Capacitance type material level detector for hoppers Capacitance type material level detector for hoppers

1974-08-09

1976-01-27

Queisser, Richard C.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

1525019, 307118, 317246, G01F 2326, H01G 520, H01H 3518

Patent

active

039344754

ABSTRACT:
A capacitance type material level detector for a hopper for particulate solid materials has a support that extends through an opening in a hopper sidewall to carry a detector unit for which it provides a hood. An electrically conductive sensor member of the detector unit is protected from contact with material in the hopper by a dielectric shield, and is sealed in a chamber defined by the shield and a mounting plate. A manually slidable and rotatable paddle hangs alongside the shield where it may be swung in front of the shield to check operativeness of the detector unit; and by moving the paddle rearwardly it may be used to break accumulated material off the face of the shield.

REFERENCES:
patent: 2187876 (1940-01-01), Ericson
patent: 2955466 (1960-10-01), Coles
patent: 2994034 (1961-07-01), Kinzer
patent: 3037165 (1962-05-01), Kerr
patent: 3089338 (1963-05-01), Glasgow
patent: 3392349 (1968-07-01), Bartley
patent: 3436059 (1969-04-01), Donaldson
patent: 3467860 (1969-09-01), Trischberger
patent: 3831069 (1974-08-01), Merrell et al.
patent: R27829 (1973-12-01), Tiffany

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