Sight glass apparatus

Details Sight glass apparatus Sight glass apparatus

2006-07-17

2009-06-02

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

Sight glass

C073S323000, C073S325000, C073S326000, C073S334000

Reexamination Certificate

active

07540187

ABSTRACT:
A sight glass apparatus providing visual information concerning the presence of absence of liquid in a refrigeration system has a sight glass with a pair of clear glass bodies secure to a housing having a chamber for the liquid. The bodies have angled prismatic surfaces. One body includes a convex lenses that directs light to a colored member that reflects a colored toroid image when the chamber is full of liquid. A moisture sensing element is mounted on the sight glass to identify the presence of water in refrigeration and air conditioning systems.

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patent: 2002/0000120 (2002-01-01), Dillon

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