(under subclass 24) Subject matter for retarding wave energy a predetermined time over a range of frequencies and systems within the class definition which include such networks and wherein one of the network parameters may be considered as concentrated at one point.
(1) Note. See the class definition for the definition of "lumped parameters".
(2) Note. The time period may be constant over the range of frequencies or proportional to the frequency (e.g., the time of delay may be greater for the higher frequency).
(3) Note. This subclass does not contain pulse delay systems utilizing active elements.
(4) Note. Devices for adjusting or maintaining the phase angle between the current and the voltage of an electric wave of a single frequency, or the phase angle between the current or voltage of a single frequency with respect to a standard or with respect to the current or voltage of another circuit
are classified in Class 323, Electricity: Power Supply or Regulation Systems, subclasses 212-219 wherein there is a single input source and a single output load and wherein the phase shift is produced by the device acting on the original electrical energy and not due to any interposed signal controlled transducer. Class 307, Electrical Transmission or Interconnection Systems, appropriate subclasses also provides for the miscellaneous phase control systems similar to these in Class 323 but having plural source circuits and/or plural load circuits.
(5) Note. Class 363, Electric Power Conversion Systems, subclasses 2, 9, 148, and indented subclasses provides for systems for transforming electrical energy having one number of phases to electrical energy having another number of phases.
SEE OR SEARCH THIS CLASS, SUBCLASS: 18, for automatically controlled delay networks.
19, for differentiating or integrating systems involving delay networks.
20, for wave synthesis and shaping systems involving delay networks.
28, for combined attenuation and phase control networks, per se.
SEE OR SEARCH CLASS
178, Telegraphy, particularly
17.5, for transmitter for storing or delaying messages or code signals; subclasses 45+ for wave transmission lines with inductive loading means to effect changes in the delay characteristics of the transmission lines; subclass 63 for phase or delay control means applied to high capacity transmission line systems; and subclass 69 for line-clearing and circuit maintenance systems which include distortion and phase correction means.
307, Electrical Transmission or Interconnection Systems, see (4) Note above.
323, Electricity: Power Supply or Regulation Systems,
212, 219, see (4) Note above.
324, Electricity: Measuring and Testing,
76.77+, for phase indicators. 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
261+, for miscellaneous circuits which may include an electron discharge device or transistor and provide specific delay in producing an output waveform. see (3) Note above.
330, Amplifiers, appropriate subclasses for amplifiers combined with phase shifting networks and for phase inverter systems involving active elements having an amplifier function appropriate subclasses for phase compensation in amplifier systems. Also see (3) Note above.
329, Demodulators,
315+, for frequency demodulators and subclasses 345+ for phase demodulators.
331, Oscillators, appropriate subclasses for oscillation generators utilizing time delay networks, particularly
82, for beam tube oscillators of the traveling wave type; and subclasses 135+ for phase shift oscillators, indented subclass 137 providing for such oscillators with a phase shift network of the RC ladder type.
332, Modulators,
144+, for phase modulation systems.
336, Inductor Devices, appropriate subclasses for the structure of inductive reactors.
343, Communications: Radio Wave Antennas, 744, for high frequency loop-type antennas with series reactance in the loop; subclasses 749+ for antennas with lumped reactance for loading the antenna; and subclass 778 for plural waveguide-type antennas with phasing.
361, Electricity: Electrical Systems and Devices,
271+, for capacitor structure.
379, Telephonic Communications,
398, and 415 for phase modifying means applied to anti-inductive systems.
