Level detector

Details Level detector Level detector

1976-07-13

1978-08-22

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

340615, G01F 2326

Patent

active

041079949

ABSTRACT:
A level detector is disclosed for detection of whether or not the level of the contents in a container, such as powder, grains, or liquid, attains a predetermined one. Said detector includes a coil and a vibrating plate consisting of a magnetic material or having a magnetic portion which plate is disposed in such a manner that the surface of said vibrating plate is nearly flush with that of the inner wall surface of said container. Said vibrating plate is vibrated by a coil disposed oppositely to said vibration plate and a drive unit to supply a pulse current to said coil. A mechanical vibrating-electric converter which is mounted on said vibrating plate converts the vibrations of said plate caused by said pulse currents into electric signals, and a sensor detects any differences in the amplitude between said electric signals detected when said contents are in contact with said vibrating plate or when said contents are not in contact with said vibrating plate.

REFERENCES:
patent: 2668365 (1954-02-01), Hogin
patent: 3019650 (1962-02-01), Worswick
patent: 3058014 (1962-10-01), Camp
patent: 3198489 (1965-08-01), Finch
patent: 3220258 (1965-11-01), Rod
patent: 3256738 (1966-06-01), Di Giacomo et al.
patent: 3287720 (1966-11-01), Chambers et al.
patent: 3730489 (1973-05-01), Morita
patent: 3985030 (1976-10-01), Charlton
Publ. "Mechanical & Electric Sensors Monitor Level & Flow" by Design Engineering (Mar. 1971) Mater & Compen (G.B.) pp. 59-63.

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