Measuring and testing – Liquid level or depth gauge – Float
Patent
1996-06-20
1998-11-03
Gutierrez, Diego F. F.
Measuring and testing
Liquid level or depth gauge
Float
73313, 733225, 73DIG5, 200 84C, 335206, 335207, G01F 2362, G01F 2376, H01H 3518
Patent
active
058293035
ABSTRACT:
A method and apparatus for measuring a liquid level using a liquid level gauge having reed switches to determine the position of a magnetic float. Firstly, providing an elongate float having an axial bore defining a longitudinal axis. The float has a plurality of magnets axially spaced along the longitudinal axis to form magnetic layers. Secondly, providing a tube having a first end and a second end. A plurality of magnetically activated reed switches are equally axially spaced from the first end to the second end. The tube extends through the axial bore of the float. Thirdly, determining which of the plurality of magnetically activated reed switches have been activated by the axially spaced magnetic layers of the float and interpolating float position in relation to the activated reed switches.
REFERENCES:
patent: 3976963 (1976-08-01), Kubler
patent: 4056979 (1977-11-01), Bongort et al.
patent: 4466284 (1984-08-01), Dumery
patent: 4730491 (1988-03-01), Lew
patent: 4955231 (1990-09-01), Mahoney
patent: 5103673 (1992-04-01), Sawada et al.
patent: 5347864 (1994-09-01), Senghaas et al.
Gutierrez Diego F. F.
Lambert Anthony R.
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