Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Patent
1988-08-12
1989-11-14
Cuchlinski, Jr., William A.
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
73304C, 340620, 137392, G01F 2324, G01F 2300
Patent
active
048799025
ABSTRACT:
An electronic level control structure for regulating a fluid level in a vessel, such as a humidifier tank. The electronic level control has at least two Teflon.RTM. coated probes for sensing fluid level in the tank and extending downwardly from a main body member. A downwardly extending sleeve positions about a portion of the upper regions of each of the probes. The Teflon.RTM. coating and the sleeve at the upper region of each probe inhibits the formation of scale between the probes at the upper end of each probe by preventing or minimizing the amount of contact by vaporous gases, mineral salts and other contaminants about the upper regions of each probe. This also prevents buildup of electrical conductive scale. In one embodiment, three probes of different lengths extend downwardly from a body member.
REFERENCES:
patent: 1978392 (1934-10-01), Brockdorff
patent: 2511649 (1950-06-01), Reiter
patent: 3339411 (1967-09-01), Riffie
patent: 3504205 (1970-03-01), Sheckler
patent: 3510836 (1970-05-01), Summerer
patent: 3534352 (1970-10-01), Gallagher
patent: 3831069 (1974-08-01), Merrell et al.
patent: 4027172 (1977-05-01), Hamelink
patent: 4056978 (1977-11-01), Zimmermann
patent: 4549245 (1985-10-01), Fleckenstein
Cuchlinski Jr. William A.
Dri Steem Humidifier Co.
Gutierrez Diego F. F.
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