Measuring and testing – Liquid level or depth gauge – With illumination
Patent
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.
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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.
Sundstrand Corporation
Yasich Daniel M.
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