Optical fluid level indicator

Details Optical fluid level indicator Optical fluid level indicator

G - Physics

01

F

73/39

G01F 23/76 (2006.01) G01F 23/04 (2006.01) G01F 23/292 (2006.01) G01F 23/64 (2006.01)

Patent

CA 1287232

ABSTRACT OF THE INVENTION An optical fluid level indicator comprising a light transmitting member having a longitudinal axis, an upper end, and a lower end adapted to extend into a fluid container, the lower end including a first surface having a shape, and a portion projecting downwardly from the first surface and forming a second surface spaced beneath the first surface and having a shape, and a float member having mounted thereon a light reflecting disc and being connected to the lower end of the light transmitting member for movement relative to the light transmitting member in the direction of the longitudinal axis and between a first position wherein the light reflecting disc is adjacent the second surface so that light transmitted to the second surface is reflected by the light reflecting disc, thereby causing appearance at the upper end of the light transmitting member of a light area having the shape of the second surface surrounded by a dark area having the shape of the first surface, and a second position wherein the light reflecting disc is spaced below the second surface, thereby causing apperance at the upper end of the light transmitting member of uniform coloration.

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