Noncontact rotating liquid film thickness sensor

Details Noncontact rotating liquid film thickness sensor Noncontact rotating liquid film thickness sensor

1989-08-21

1991-04-02

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

With illumination

2502273, 250577, 340619, G01F 2326, G01N 2141

Patent

active

050038230

ABSTRACT:
The problem of measuring oil film thickness in a rotating housing (66) is solved using a noncontact liquid film thickness sensor. The housing (66) is rotatable about an axis (58) and includes a cylindrical outer wall coaxial to the axis. A plurality of U-shaped glass rods (70) are within the rotating housing (66) and have opposite legs (72, 74) mounted through openings in the outer wall. At least one leg (72) of each rod (70) is coplanar with a similar leg of each other rod. Each rod (70) has a different length between its opposite legs (72, 74). A light source (76) is provided outwardly of the housing (66) and coplanar with the coplanar legs (72). A sight glass (80) or other sensing device is provided outwardly of the housing (66) proximate the path of movement of the opposite leg (74) of each of the rods.

REFERENCES:
patent: 3704060 (1972-11-01), McNaney
patent: 3969941 (1976-07-01), Rapp
patent: 3997268 (1976-12-01), Fladda et al.
patent: 4035635 (1977-07-01), Crosland et al.
patent: 4132899 (1979-01-01), Shigemasa et al.
patent: 4170731 (1979-10-01), Howell et al.
patent: 4182259 (1980-01-01), Garner et al.
patent: 4355903 (1982-10-01), Sandercock
patent: 4606641 (1986-08-01), Yamada et al.
patent: 4727356 (1988-02-01), Abe et al.
patent: 4880990 (1989-11-01), Rando
"Optical Fibers, Glass Probe Sense Liquid Level", Design News, (#1019) Nov. 21, 1988, (David J. Bak-East Coast Editor), 2 pages.

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