(under subclass 23) Subject matter wherein the scale or dial is contained within an instrument case and the illuminating structure is external to the case; the case having an opening through which the scale or dial is observed and either another opening or light transparent portion through which light from the external illuminating structure enters the case to illuminate the scale or dial.
(1) Note. The instrument has no structure to measure a quantity and the dial has no arrangement or structure to classify the instrument or dial in an appropriate measuring or indicating class.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
792+, for dial type distance measuring, and subclasses 501+ for measuring type gauges.
73, Measuring and Testing,
293, for illuminated liquid level gauges; subclass 499 for a speed or acceleration illuminated reading device; subclasses 388+ for fluid pressure gauges; and subclass 431 for instrument casings. 116, Signals and Indicators,
250, for illumination of an indicator and see search notes for other search areas.
324, Electricity: Measuring and Testing,
76.11+, for measuring, testing or sensing electricity, subclasses 160+ for electrical speed measuring devices, and subclass 156 for casings, per se.
374, Thermal Measuring and Testing,
100+, for detailed structure of thermometers in such an arrangement.
