US Patent Class 315
ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1  DF  CATHODE RAY TUBE CIRCUITS {11}
500  DF  HIGH ENERGY PARTICLE ACCELERATOR TUBE {3}
32  DF  COMBINED LOAD DEVICE OR LOAD DEVICE TEMPERATURE MODIFYING MEANS AND ELECTRICAL CIRCUIT DEVICE STRUCTURE {19}
76  DF  SPECIAL APPLICATION {2}
84.51  DF  PULSE STORING SYSTEMS OF THE GASEOUS DISCHARGE-TUBE TYPE {1}
85  DF  WITH ELECTROMAGNETIC WAVE RADIATION PREVENTING OR SHIELDING MEANS
86  DF  AUTOMATIC SUBSTITUTION OF THE POWER SUPPLY {1}
88  DF  AUTOMATIC SUBSTITUTION OF THE LOAD DEVICE OR ELECTRODE {5}
94  DF  WITH CATHODE OR CATHODE HEATER SUPPLY CIRCUIT {6}
108  DF  CONFINED GAS OR VAPOR-TYPE LOAD DEVICE WITH PRESSURE REGULATING MEANS {2}
111.01  DF  DISCHARGE DEVICE LOAD WITH FLUENT MATERIAL SUPPLY TO THE DISCHARGE SPACE {3}
112  DF  WITH LOAD DEVICE TEMPERATURE MODIFIER {4}
119  DF  WITH AUTOMATIC SHUNT AND/OR CUTOUT {6}
129  DF  WITH SIGNAL, INDICATOR, OR ALARM {5}
137  DF  POLYPHASE A.C. SUPPLY {4}
149  DF  WITH RADIANT ENERGY SENSITIVE CONTROL MEANS {8}
160  DF  PLURAL POWER SUPPLIES {8}
177  DF  LOAD DEVICE IN THE PRIMARY AND SECONDARY CIRCUIT OF THE SUPPLY TRANSFORMER
178  DF  PLURAL DIVERSE-TYPE LOAD DEVICES {2}
184  DF  THREE OR MORE LOAD DEVICES CONNECTED BETWEEN DIVERSE PAIRS OF PAIRED CONDUCTORS
185 R  DF  PLURAL SERIES CONNECTED LOAD DEVICES {7}
194  DF  REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS {2}
200 R  DF  DISCHARGE DEVICE AND/OR RECTIFIER IN THE SUPPLY CIRCUIT {7}
209 R  DF  PERIODIC SWITCH IN THE SUPPLY CIRCUIT {11}
227 R  DF  CONDENSER IN THE SUPPLY CIRCUIT {10}
246  DF  PULSATING OR A.C. SUPPLY {10}
288  DF  THREE OR MORE WIRE DISTRIBUTION SYSTEMS
289  DF  SURGE GENERATOR OR INDUCTANCE IN THE SUPPLY CIRCUIT {1}
291  DF  CURRENT AND/OR VOLTAGE REGULATION {7}
312  DF  PLURAL LOAD DEVICE SYSTEMS {3}
326  DF  DISCHARGE DEVICE LOAD {8}
359  DF  PYRO-ELECTRIC DEVICE LOAD
360  DF  TIME-CONTROLLED
361  DF  PLURAL CONTROL STATIONS
362  DF  ELECTRIC SWITCH IN THE SUPPLY CIRCUIT
363  DF  MISCELLANEOUS SYSTEMS
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DIGESTS
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DIG 1  DF  Fluorescent lamp circuits with more than two principle electrodes
DIG 2  DF  High frequency starting operation for fluorescent lamp
DIG 3  DF  Circuit for ion gauges and pressure gauges
DIG 4  DF  Dimming circuit for fluorescent lamps
DIG 5  DF  Starting and operating circuit for fluorescent lamp
DIG 7  DF  Starting and control circuits for gas discharge lamp using transistors