.~ Phase comparison (e.g., between cyclic pulse voltage and sinusoidal current, etc.) {11}
91
.~.~ Synchroscope type
DEFINITION
Classification: 324/91
(under subclass 83) Subject matter for indicating if two voltages or currents are in phase.
(1) Note. The indication may be quantitative or qualitative, as, for example, "lead" and "lag". The measurement must be of a phase angle and not of some unrelated quantity. Thus, for example, a mere voltmeter, even though designated a "synchroscope", is not classified here but is classified with the appropriate art.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84, through 90, for this subject matter where the synchroscope is of the type set forth in subclasses 84 through 90.
