Meter reading apparatus

Details Meter reading apparatus Meter reading apparatus

1993-01-04

1996-02-13

Nguyen, Thong Q.

Optical: systems and elements

Optical aperture or tube, or transparent closure

Submerged object viewer

359440, 359809, 359819, G02B 500, G02B 702, G02B 2702

Patent

active

054915899

ABSTRACT:
A cylindrical viewing tube for reading submerged water meters, comprising a clear, high strength polycarbonate viewing tube, a closed bottom end for engaging a submerged meter face, the bottom end being replacable and being threaded onto the viewing tube.

REFERENCES:
patent: 1515065 (1924-11-01), Milliken
patent: 4215916 (1980-08-01), Bell et al.
patent: 4515437 (1985-05-01), Story
patent: 4594204 (1986-06-01), Heidenreich et al.
patent: 4643523 (1987-02-01), Smedley et al.
patent: 4844595 (1989-07-01), Nealy
patent: 5074695 (1991-12-01), DeRosa
patent: 5114792 (1992-05-01), McWilliams et al.
patent: 5210647 (1993-05-01), Hartnagel et al.

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