Liquid level detection device

Details Liquid level detection device Liquid level detection device

2006-09-26

2006-09-26

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

C073S317000, C073S305000, C073S29000R, C073S313000, C073S314000, C340S620000, C340S623000, C340S624000

Reexamination Certificate

active

07111510

ABSTRACT:
A liquid level detecting apparatus having detachable terminals and capable of holding down the formation of silver sulfide is provided. The apparatus includes a movable contact displaced in accordance with the fluctuation of a liquid level, electrodes slidingly contacted by the movable contact on a circuit board, a first resistance connected to the electrodes, and connecting portions which the terminals contact, a resistance value of the first resistance which varies when the movable contact is slidingly moved on the electrodes being outputted from the terminals via the connecting portions, wherein the sections of the connecting portions which contact at least the terminals are covered with second resistances.

REFERENCES:
patent: 2767264 (1956-10-01), Scott, Jr.
patent: 6571627 (2003-06-01), Yasuda et al.
patent: 6972685 (2005-12-01), Sato et al.
patent: 59-160718 (1984-09-01), None
patent: 60-39201 (1985-03-01), None
patent: 8-50045 (1996-02-01), None

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