Liquid level indicator

Claim 1

A level indicator for indicating levels of liquid subject to fluctuation, including a light transmitting member having an upper section provided with a light receiving surface, a depending section extending downwardly from said upper section, light reflective surface means associated with said depending section adapted to extend within a body of liquid subject to level fluctuations, said light reflective surface means angularly disposed with respect to said upper light receiving surface so as to receive light from and reflect light to said light receiving surface when said light reflective surface means is located above the level of a body of liquid, indicia means of fractional thickness on said light receiving surface, said indicia means comprising a pigment and carrier therefor, the carrier being fusibly compatible with the material of the light transmitting member, a protective covering for the indicia men means and the light receiving surface associated therewith, said covering being fusibly compatible with the material of the light transmitting member, the material of said light transmitting member, indicia means and protective covering having substantially the same index of light refraction, said indicia means having a color which is compatible with the shading to which said depending section may be subjected when immersed in the liquid of a complementary container, whereby to assure substantial uniformity in shade of color of the combined indicia and light receiving surface when said light reflective surface means is immersed in a body of liquid.