(under subclass 364) Subject matter wherein the cathode-ray tube includes a cathode-ray beam source, fluorescent target, and a marker circuit whereby the cathode-ray beam is caused to produce a periodically recurring indication pattern, or marker on the fluorescent target by the effect of the marker circuit on the cathode-ray beam, when the marker circuit is energized.
(1) Note. This subclass provides for markers caused by intensity control of the cathode-ray beam when distinctly claimed as a marker. For intensity control in general, see subclasses 383+.
(2) Note. Included in this subclass are cathode-ray tube
marker circuitry subcombinations with energization means connected thereto which are connected to deflection means to give a pulse input to the deflection means but wherein the deflection means is not distinctly claimed.
SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing,
600+, for devices determining impedance, admittance and related quantities which may employ a marker signal generator. 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for electron space discharge devices having a particular wave output with a marker pulse.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),
138, 142+ and 182+ for echo type communication systems which utilize a cathode-ray tube including a marker circuit.
348, Television,
601, for television systems which include circuitry to generate and display a marker on a cathode-ray tube.
356, Optics: Measuring and Testing,
3+, for light type radar systems which may have electronic markers on cathode-ray radar displays.
367, Communications, Electrical: Acoustic Wave Systems and Devices,
113, for sonar devices which have a cathode-ray display having an electronic marker.
