(under subclass 311) Subject matter having structure whose properties compensate for undesired changes in the device which would result from temperature change.
(1) Note. Undesired changes of this subclass type cause, for example, force to be applied to the crystal as a result of expansion or contraction of the crystal or structurally associated member due to temperature variation. Structure of this subclass type may have, for example, matching or mismatching coefficients of thermal expansion. Devices that merely modify the temperature, or keep the temperature around the crystal unchanged (e.g., heat sinks, fans, ovens, etc.), however, are provided for elsewhere. See the search notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
341, for the combination of a piezoelectric element and a temperature modifying means.
