US PATENT SUBCLASS 250 / 903
.~.~.~ With prism contacting liquid

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

900  DF  OPTICAL LIQUID LEVEL SENSORS {2}
901  DF  .~ With gap between light guide elements (includes open light path preset) {1}
902  DF  .~.~ With closed light path preset {1}
903.~.~.~ With prism contacting liquid

DEFINITION

Classification: 250/903

With prism contacting liquid:

(under subclass 902) Art collection of liquid level sensors related to those in ... in which a prism forms the gap between the fibers and the prism is placed in contact with the liquid to open the light path in the gap.

(1) Note. An illustration of this situation appears below: [figure]