US PATENT SUBCLASS 374 / 190
.~.~ Indicating tube type

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
187  DF  .~ Mechanical (e.g., expansion or contraction of materials) {10}
190.~.~ Indicating tube type {4}
191  DF  .~.~.~> With optical element (e.g., magnifying)
192  DF  .~.~.~> With holder for shaking
193  DF  .~.~.~> Having specified cross section
194  DF  .~.~.~> With support or housing

DEFINITION

Classification: 374/190

Indicating tube type:

(under subclass 187) Subject matter wherein the expansion of a sensing or indicating material is visible through a transparent tube.

(1) Note. The tube or its mounting usually has a graduated scale to provide a numerical indication.

(2) Note. Although the material is usually a liquid, use of a gas or a semisolid material is included herein.