Water level probe

Details Water level probe Water level probe

1990-02-23

1991-07-16

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

33719, 340620, G01F 2304

Patent

active

050314521

ABSTRACT:
One electrode of the probe is its tubular outer sleeve (3), and the other is its central rod (4). The insulators (9,16) separating the two are attached rigidly to the central rod, whereby the outer sleeve may slide off the probe for cleaning and servicing purposes. The outer sleeve is held in place simply by friction from the O-ring seals (12,30). When the sleeve is removed, the central rod, insulators, etc., remain as a structurally complete sub-assembly. Electrical contact with the outer sleeve is made through an expandable canted coil spring (20), mounted on an insulator. The central rod is formed with a massive center section (7), for weighting the probe. The probe is supported on a graduated tape (36), in which are embedded the electrical leads (38) to the probe. The leads are securely attached and sealed in place by means of heat-shrinkable material (50), which is wrapped around the leads, heat-shrunk, and compressed into a pocket (27).

REFERENCES:
patent: 2657577 (1953-11-01), Falk
patent: 2997878 (1961-08-01), Graham
patent: 3909948 (1975-10-01), Markfelt
patent: 4279078 (1981-07-01), Hinshaw et al.
patent: 4586033 (1986-04-01), Andrejasich
patent: 4841770 (1989-06-01), Davies

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