Manual of U.S. Patent Classification
as of June 30, 2000

Class
315
ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS
1		CATHODE RAY TUBE CIRCUITS
3		. Combined cathode ray tube and circuit element structure
3.5		. . Traveling wave tube with delay-type transmission line
3.6		. . . Line with plural characteristics or plural lines
4		. . Inductor or distributed parameter-type inductive structure
5		. . . Ray passes in or through a hollow distributed parameter device
5.11		. . . . With a secondary emission stage
5.12		. . . . . Secondary emission passes through or in the hollow device
5.13		. . . . With a magnetron
5.14		. . . . Plural rays pass through or in the hollow device
5.15		. . . . . Rays merged at the hollow device
5.16		. . . . . Plural hollow devices
5.17		. . . . . . Feedback by ray
5.18		. . . . Ray returns to the hollow device; e.g., reflex type
5.19		. . . . . By same path and/or to same aperture
5.21		. . . . . . Device tunable
5.22		. . . . . . . Device has a flexible wall
5.23		. . . . . . . . Thermally controlled
5.24		. . . . Deflecting or reflecting the ray
5.25		. . . . . Ray sweeps over an aperture or slot in the hollow device
5.26		. . . . . Device deflects the ray
5.27		. . . . . . Plural hollow devices
5.28		. . . . . Plural hollow devices
5.29		. . . . Ray has appreciable transverse electrical dimension and/or significant shape
5.31		. . . . . Hollow ray
5.32		. . . . . Disk-shaped ray
5.33		. . . . Device also a ray anode or cathode
5.34		. . . . Focusing and/or concentrating the ray
5.35		. . . . . By magnetic field
5.36		. . . . Device removable from its grids
5.37		. . . . Device has particular grid structure
5.38		. . . . With particular collector or anode structure
5.39		. . . . Plural hollow devices
5.41		. . . . . Accelerating or decelerating the ray between the hollow devices
5.42		. . . . . Devices excited to accelerate the ray across their gaps; e.g., synchrotrons
5.43		. . . . . Devices of different resonance frequency
5.44		. . . . . Feedback connection between the hollow devices
5.45		. . . . . . Three hollow devices
5.46		. . . . . Device tunable
5.47		. . . . . . Gang tuned hollow devices
5.48		. . . . . . Device has a flexible wall
5.49		. . . . . Three hollow devices
5.51		. . . . Plural gaps in the hollow device
5.52		. . . . Device has a re-entrant portion surrounding the ray
5.53		. . . . Device tunable
5.54		. . . . . Device has a flexible wall
7		. . . Connected to the deflecting electrodes
8		. Compensating for stray deflecting fields
8.51		. Pulse storing
8.61		. . Plural cathode-ray tubes or ray-type tubes
9		. Plural cathode-ray tubes in the circuit
10		. With radiant energy sensitive control means
11		. . With secondary emission stage in the cathode-ray tube
11.5		. . . Color convergence controlled by photodetector
12.1		. With secondary emission stage in the cathode-ray tube
13.1		. Plural ray-type tube
13.11		. . Storage tubes
14		. Plural concentrating, accelerating, and/or de-accelerating stages
15		. . Three or more stages
16		. . . Intermediate stage at lower potential
17		. . With ray-deflecting stage interposed between plural concentrating or accelerating and/or de-accelerating stage or co-extensive with one such stage
364		. Cathode-ray deflections circuits
365		. . Symbol generator
366		. . For flat cathode-ray tube
368.11		. . Including color convergence control
368.12		. . . Including specified signal storage (e.g., memory, register, etc.)
368.13		. . . . Interpolation
368.15		. . . Including electrostatic element (e.g., electrode, lens, etc.)
368.16		. . . . Offset apertures in plural sequential electrodes
368.17		. . . Including signal delay circuitry
368.18		. . . Including specified waveform generating circuitry
368.19		. . . . By nonlinear device (e.g., square law device, diode, etc.)
368.21		. . . . Parabolic waveform
368.22		. . . . . By integrating of signal
368.23		. . . . . By multiplying of signal
368.24		. . . Static convergence feature
368.25		. . . Including core or winding structure
368.26		. . . . Adjacent to or integral with deflection winding or housing structure therefor
368.27		. . . Including particular magnetic field distribution
368.28		. . . Including plural cores or coils
367		. . Including a digital-to-analog device
369		. . Target controls deflection circuit
370		. . With ray deflection distortion correction or reduction
371		. . . By modulation of deflection waveform
372		. . For cathode-ray tube having plural targets
373		. . . Targets radially about cathode
374		. . . Targets in single plane
375		. . For plural phosphor target tube
376		. . . With post deflection phosphor selection
377		. . With marker
378		. . Circular, spiral, or radial sweeps
379		. . With additional control of cathode ray
380		. . . Control only at turn-on or turnoff of circuit
381		. . . . Circuits control grid-cathode circuit of tube
382		. . . With focusing of ray
382.1		. . . . For television
383		. . . Intensity control of ray
384		. . . . Ray blanking
385		. . . . Ray unblanking
386		. . . . With ray control responsive to deflection circuit
387		. . Including feedback circuit
388		. . . Plural feedback circuits
389		. . . Negative feedback
390		. . . . Tube-type circuit
391		. . Plural deflection circuits
392		. . . Plural waveform display circuits
393		. . . Interconnected sweep circuits
394		. . . Plural deflections in one plane
395		. . Plural potentials or currents applied to deflection member
396		. . . Push-pull deflection circuit
397		. . . . Coil-type circuit
398		. . . With cathode-ray centering
399		. . Deflection coil circuit
400		. . . Including a saturable element
401		. . . Including a temperature responsive element
402		. . . Including a voltage dependent resistor
403		. . . Including an amplifier
404		. . . . Tube-type amplifier
405		. . . . . With transformer connecting amplifier to coil
406		. . . . . . With power recovery circuit
407		. . . . . With diode or amplifier across coil
408		. . . Including solid-state switch
409		. . Including a discharge device
410		. . . With device discharging a condenser
30		. Ray modulation
411		. Power supply from deflection circuit source
500		HIGH ENERGY PARTICLE ACCELERATOR TUBE
501		. Magnetic field acceleration means
502		. . Cyclotron
503		. . Synchrotron
504		. . Betatron
505		. . Linear accelerator (Linac)
506		. Electrostatic accelerator means
507		. With injection or extraction means
32		COMBINED LOAD DEVICE OR LOAD DEVICE TEMPERATURE MODIFYING MEANS AND ELECTRICAL CIRCUIT DEVICE STRUCTURE
33		. Portable self-contained
34		. With antenna
35		. Plural discharge device loads
36		. . Series connected discharge devices
37		. . Cathode-anode circuit connected to the discharge control electrode of another discharge device load (e.g., cascade)
38		. . Corresponding electrodes connected by a circuit impedance (e.g., push-pull)
39		. Discharge device load with distributed parameter-type transmission line (e.g., wave-guide, coaxial cable)
39.3		. . Traveling wave type with delay-type transmission line
39.51		. Distributed parameter resonator-type magnetron
39.53		. . With output-coupling means
39.55		. . Variable tuning
39.57		. . . Electron emission type
39.59		. . . Thermal or magnetic actuator
39.61		. . . Movable tuning element (e.g., slug)
39.63		. . With control electrode, secondary emitter, or auxiliary anode or cathode
39.65		. . Having diverse size resonators
39.67		. . Tubular anode with eccentric or axially displaced cathode
39.69		. . With strapping for resonant structure
39.71		. . Magnetic field generating and pole structure
39.73		. . Interdigital electrode
39.75		. . Anode with plural cavities
39.77		. . With resonant cavity coupled to anode
40		. Electrode formed as inductive impedance
41		. Inductive impedance connected between electrodes of a discharge device load
42		. . Connected to plural anodes or plural cathodes
43		. . Connected to control electrode
44		. . . With capacitive impedance connected to the control electrode
45		. . With diverse-type impedance
46		. Filament, electric heater, or resistance in shunt with the discharge electrodes of a discharge device load
47		. . Automatic switch in the shunt circuit
48		. . Cathode or cathode heater in the shunt circuit
49		. Filament or electric heater in series with a discharge device load
50		. Load device temperature-modifying means combined with or forming circuit impedance means
51		. Plural circuit elements
52		. . Plural impedance elements
53		. . . Diverse types of impedances
54		. . . Plural inductive impedances
55		. Electric generator or piezoelectric device
56		. Discharge device load
57		. . Discharge device and transformer
58		. . Discharge device and circuit impedance
59		. . . Impedance connected between two electrodes
60		. . . . Impedance connected to an auxiliary starting electrode
61		. . . . Discharge control discharge device
62		. . . Inductive impedance
63		. . Discharge control discharge load
64		. Multiple filament load devices
65		. . Automatic substitution of the filament
66		. . Series connected filaments
67		. . Diverse resistance filaments
68		. . Three or more controlled filament circuits
69		. . Plural filaments energized in parallel
70		. Load device and transformer
71		. Load device and impedance
72		. Load device and periodic electric switch
73		. Electric switch inside evacuated or gas filled envelope
74		. Automatic shunt circuit closing or cut-out switch
75		. . Shunt circuit closing
76		SPECIAL APPLICATION
77		. Vehicle
78		. . Vehicle motor or vehicle motion driven generator
79		. . Vehicle or engine speed controlled
80		. . Load device controller combined with vehicle controller
81		. . . Steering mechanism controlled
82		. . Head light systems
83		. . . Alternate circuit closing
84		. Door or closure controlled load device
84.51		PULSE STORING SYSTEMS OF THE GASEOUS DISCHARGE-TUBE TYPE
84.61		. With plural cathode or anode tube
85		WITH ELECTROMAGNETIC WAVE RADIATION PREVENTING OR SHIELDING MEANS
86		AUTOMATIC SUBSTITUTION OF THE POWER SUPPLY
87		. With load device or electrode substitution
88		AUTOMATIC SUBSTITUTION OF THE LOAD DEVICE OR ELECTRODE
89		. Plural substitution of load devices or electrodes
90		. Plural load devices with selective substitution of load device or electrode
91		. Over-voltage or over-current controlled substitution
92		. Diverse-type load device or electrode substituted
93		. With current shifting switch
94		WITH CATHODE OR CATHODE HEATER SUPPLY CIRCUIT
95		. Plural load device systems
96		. . Series connected cathodes or heaters
97		. . Pulsating or A.C. supply to the cathode or heater circuit
98		. Plural cathodes or heaters in the load device
99		. . Series connected cathodes or heaters
100		. . . Thermostatic switch in the series circuit
101		. Discharge device and/or rectifier in the cathode or heater circuit
102		. Delayed application of the discharge potential
103		. . With surge generator in the discharge circuit
104		. . Thermostatic controlled delaying means
105		. Pulsating or A.C. supply to the cathode or heater circuit
106		. . Automatic cut-out or voltage regulator in the cathode or heater circuit
107		. Automatic cut-out or voltage regulator in the cathode or heater circuit
108		CONFINED GAS OR VAPOR-TYPE LOAD DEVICE WITH PRESSURE REGULATING MEANS
109		. Auxiliary discharge type
110		. Valve controlled
111.01		DISCHARGE DEVICE LOAD WITH FLUENT MATERIAL SUPPLY TO THE DISCHARGE SPACE
111.11		. With tangential fluent material supply
111.21		. Plasma generating
111.31		. . With extraction electrode
111.41		. . With magnetic field
111.51		. . . Induction type
111.61		. . . Acceleration
111.71		. . . Plasma containment
111.81		. Electron or ion source
111.91		. . Gas ionization type (e.g., ion pump or gauge source)
112		WITH LOAD DEVICE TEMPERATURE MODIFIER
113		. Plural load device systems
114		. . Electric heater for the load devices
115		. Electric heater for the load device
116		. . Automatic cut-out or voltage regulator for the heater circuit
117		. Automatic control of the temperature modifier
118		. Load device circuit controlled by the temperature modifying medium
119		WITH AUTOMATIC SHUNT AND/OR CUTOUT
120		. Combined with signal, indicator, or alarm
121		. Plural load device systems
122		. . Series connected load devices
123		. Plural shunts and/or cut-outs
124		. Auxiliary electrode controlled
125		. Shunt circuit closing
126		. . With compensating impedance
127		. Supply circuit current and/or potential actuated switch
128		. . Plural switch operating means
129		WITH SIGNAL, INDICATOR, OR ALARM
130		. Plural load device systems
131		. . Selective indication of the load device
132		. . . Plural signals, indicators, or alarms
133		. Plural signals, indicators, or alarms
134		. Radiant energy responsive control type
135		. Discharge device and/or rectifier in the signal circuit
136		. Electrically operated switch controlling the signal circuit
137		POLYPHASE A.C. SUPPLY
138		. M phase to N phase (e.g., phase splitters)
139		. . Polyphase supply circuit
140		. . . Phase multiplying
141		. Transformer in the supply circuit
142		. . With interphase transformer in the supply circuit
143		. . Convertible transformer connections
144		. . Plural load devices
145		. . Plural cathode and/or anode load device
146		. Plural discharge control discharge device load devices
147		. Plural cathode and/or anode discharge device load
148		. . Discharge control discharge device
149		WITH RADIANT ENERGY SENSITIVE CONTROL MEANS
150		. Radiant energy responsive load device
151		. Load device irradiating the radiant energy responsive device
152		. Plural load devices
153		. . Selective energization of the load devices
154		. . . Selective electric switch controlled by the radiant energy responsive device
155		. Plural radiant energy responsive devices
156		. Radiant energy control of an electric discharge device in the supply circuit of the load device
157		. Discharge control discharge device load controlled by the radiant energy responsive device
158		. Radiant energy controlled regulation of the current supply for the load device
159		. Electric switch controlled by the radiant energy responsive device
160		PLURAL POWER SUPPLIES
161		. Plural load devices
162		. . Diverse type load devices
163		. . . Simultaneous application of diverse type current supplies to a load device
164		. . Series connected current supplies
165		. . Diverse type current supplies
166		. . . Simultaneous application to a load device
167		. Plural cathode and/or anode load device
168		. . Diverse type current supplies to auxiliary and principal electrodes
169.1		. . Diverse-type energizing or bias supplies to different electrodes
169.2		. . . Including shifting of register, counter, or display
169.3		. . . Electroluminescent device
169.4		. . . Gas display panel device
170		. Series connected current supplies
171		. Discharge device and/or rectifier in one of the supply circuits
172		. Periodic switch in one of the supply circuits
173		. Condenser in one of the supply circuits
174		. Plural diverse pulsating or A.C. supplies
175		. Diverse-type current supplies
176		. . Simultaneous application to the load device
177		LOAD DEVICE IN THE PRIMARY AND SECONDARY CIRCUIT OF THE SUPPLY TRANSFORMER
178		PLURAL DIVERSE-TYPE LOAD DEVICES
179		. Series connected diverse-type load devices
180		. . Plural diverse discharge device load
181		. . . Asymmetrical discharge device load
182		. Electric discharge device load
183		. . Plural diverse discharge device loads
184		THREE OR MORE LOAD DEVICES CONNECTED BETWEEN DIVERSE PAIRS OF PAIRED CONDUCTORS
185R		PLURAL SERIES CONNECTED LOAD DEVICES
186		. Periodic switch in the supply circuit
187		. Condenser in the supply circuit
188		. . Condenser in shunt to load and supply
189		. Discharge device loads
190		. . Asymmetrical discharge device loads
191		. Convertible to parallel connected
192		. Combined with parallel connected load device
193		. Electric switch controlled load device
185S		. Christmas lights
194		REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS
195		. Plural load device systems
196		. . Inverse parallel connected asymmetric load devices
197		. . . Discharge control discharge device in the control circuit
198		. . Discharge control discharge device in the control circuit
199		. Discharge control discharge device in the control circuit
200R		DISCHARGE DEVICE AND/OR RECTIFIER IN THE SUPPLY CIRCUIT
201		. Plural load device systems
202		. Plural cathode and/or anode discharge device load
203		. . Discharge device or rectifier in the auxiliary starting electrode circuit
204		. . . Discharge control discharge device in the auxiliary electrode circuit
205		. Plural discharge devices and/or rectifiers in the supply circuit
206		. Discharge device and/or rectifier in the primary circuit of the supply transformer
207		. Discharge device and/or rectifier in shunt to the load device
208		. Discharge control discharge device in the supply circuit
200A		. Flashers
209R		PERIODIC SWITCH IN THE SUPPLY CIRCUIT
210		. Plural load device systems
211		. . Distributor type periodic switch means
212		. . . Transformer in the supply circuit
213		. . . . Distributor switch means in the primary circuits of plural transformers
214		. . . . With additional periodic switch in the primary circuit
215		. . . With additional periodic switch in the distributor switch means circuit
216		. . . Plural electrically operated switches
217		. . Periodic switch selectively connectable to plural load device circuits
218		. Magnetoelectric generator supply
219		. Periodic switch in the primary circuit of the supply transformer
220		. . Plural transformers in the supply circuit
221		. . Secondary conductively connected to the primary
222		. . Plural interrupted transformer coil circuits
223		. . Condenser or inductance in the primary circuit
224		. Impedance or current regulator in the supply circuit
225		. Periodic switch cut-out
226		. Plural periodic switches or multiple contact periodic switch
209T		. Transistorized ignition systems
209CD		. Capacitor dischargeneous ignition systems
209M		. Miscellaneous ignition systems
209PZ		. Piezoelectric ignition systems
209SC		. Silicon controlled rectifier ignition
227R		CONDENSER IN THE SUPPLY CIRCUIT
228		. Plural load device systems
229		. . Condenser connected to plural cathodes or anodes of asymmetrical discharge device loads
230		. . Discharge control discharge device loads
231		. . Plural series connected condenser and load device circuits
232		. . Condenser in shunt to load and supply
233		. Plural cathode and/or anode discharge device load
234		. . Condenser in the auxiliary starting electrode circuit
235		. . Condenser connected to plural cathodes or anodes
236		. Electromagnetic influenced discharge device load
237		. Discharge control discharge device load
238		. . Condenser in the control circuit
239		. Transformer in the condenser load device circuit
240		. Electric switch in the condenser circuit
241R		. Condenser in shunt to the load device and the supply
242		. . With an inductance in the circuit
243		. . . Inductance in series with the load device and the supply
241P		. . Photoflash
241S		. . Strobe lights
244		. Inductance in the condenser circuit
245		. Resistance in the condenser circuit
227A		. Arc machining
246		PULSATING OR A.C. SUPPLY
247		. With power factor control device
248		. Induction-type discharge device load
249		. Potential node-type discharge device load
250		. Plural load device systems
251		. . Inverse parallel connected asymmetrical discharge device loads
252		. . Discharge control discharge device loads
253		. . Full wave systems with asymmetrical discharge device loads
254		. . Transformer in the supply circuit
255		. . . Plural transformers in the supply circuit
256		. . . . Primaries in series
257		. . . With plural secondary or tapped secondary
258		. . Inductance in the supply circuit
259		. . . Variable inductance
260		. Plural cathode and/or anode discharge device load
261		. . Auxiliary starting electrode-type discharge device load
262		. . . Transformer or auxiliary winding in the auxiliary electrode circuit
263		. . . Inductance or potential surge generator in the auxiliary electrode circuit
264		. . . Impedance in the auxiliary electrode circuit
265		. . Full wave-type system
266		. . . Transformer in the supply circuit
267		. Electromagnetic influenced discharge device load
268		. Discharge control discharge device load
269		. . With plural discharge control devices
270		. . Plural control potentials
271		. . . Plural pulsating and/or A.C. potentials
272		. . Rectifier and/or discharge device in the control circuit
273		. . . With condenser in the control circuit
274		. . Transformer in the control circuit
275		. . Condenser in the control circuit
276		. Transformer in the supply circuit
277		. . Plural transformers in the supply circuit
278		. . Three or more coil-type transformers
279		. . Current regulator in the primary circuit
280		. . Convertible to inductance
281		. . Relatively movable core and coil-type transformer
282		. . Regulating transformer
283		. Inductance in the supply circuit
284		. . Variable inductance
285		. . . Relatively movable core and coil-type inductance
286		. . . . Biased movable part with supply current controlled movement
287		. Periodic-type current and/or voltage regulator in the supply circuit
288		THREE OR MORE WIRE DISTRIBUTION SYSTEMS
289		SURGE GENERATOR OR INDUCTANCE IN THE SUPPLY CIRCUIT
290		. Circuit interrupter in the inductance circuit
291		CURRENT AND/OR VOLTAGE REGULATION
292		. Keyboard operated or pattern controlled regulator
293		. Pre-selectable regulator systems
294		. Plural load device regulation
295		. . Regulator selectively connectable to plural circuits
296		. . Inverse control of load devices
297		. . Automatic regulation
298		. . Mechanically connected regulators
299		. Plural regulators
300		. . Current generator control
301		. . Plural automatic regulators
302		. Current generator control
303		. . Control of the prime mover
304		. . Plural field-type generator
305		. . . Three or more fields
306		. Regulator in shunt to the load device
307		. Automatic regulation
308		. . Regulator responsive to plural conditions
309		. . Thermal responsive regulator
310		. . Shunted impedance-type regulator
311		. . Variable impedance-type regulator
312		PLURAL LOAD DEVICE SYSTEMS
313		. Electric switch in the supply circuit
314		. . Pre-selectable switching systems
315		. . . Electrically controlled load device switch
316		. . Keyboard or pattern controlled switch
317		. . Three or more controlled load device circuits
318		. . . Group control systems
319		. . . . Four or more groups
320		. . Plural switches
321		. . . Master circuit closing switch
322		. . Alternate circuit closing
323		. Sequential starting
324		. Plural discharge device loads
325		. . Discharge control discharge device loads
326		DISCHARGE DEVICE LOAD
327		. Discharge drawing-type discharge device
328		. . Tilting discharge device
329		. . . Electrically controlled tilting
330		. . Auxiliary starting electrode type
331		. . . Movable auxiliary starting electrode
332		. . . . Automatic switch in the electrode moving device circuit
333		. . Automatic cut-out for the electrode moving device circuit
334		. Plural cathode and/or anode discharge device load
335		. . Auxiliary starting electrode-type discharge device
336		. . . Plural auxiliary starting electrode
337		. . Diverse potentials for the discharge electrodes
338		. . Electromagnetic influenced discharge device
339		. . Discharge control discharge device load
340		. With de-ionizing means in the cathode-anode circuit
341		. With plural discharge control devices
342		. . Diverse types
343		. . Plural electromagnetic devices
344		. Electromagnetic influenced discharge device
345		. . Rail-type discharge device load
346		. . Plural current supply to the electromagnet
347		. . Series connected with the load device
348		. . Pulsating or A.C. supply to the electromagnet
349		. Discharge control discharge device load
350		. . Plural control currents and/or potentials
351		. . . Plural pulsating or A.C. currents and/or potentials
352		. . Rectifier and/or discharge device in the control circuit
353		. . . With condenser in the control circuit
354		. . Transformer in the control circuit
355		. . Condenser in the control circuit
356		. . . Inductance in the control circuit
357		. Movable electrode discharge device
358		. Plural gases or vapors in the discharge device
359		PYRO-ELECTRIC DEVICE LOAD
360		TIME-CONTROLLED
361		PLURAL CONTROL STATIONS
362		ELECTRIC SWITCH IN THE SUPPLY CIRCUIT
363		MISCELLANEOUS SYSTEMS
		******************************
		DIGESTS
		******************************
DIG 1		Fluorescent lamp circuits with more than two principle electrodes
DIG 2		High frequency starting operation for fluorescent lamp
DIG 3		Circuit for ion gauges and pressure gauges
DIG 4		Dimming circuit for fluorescent lamps
DIG 5		Starting and operating circuit for fluorescent lamp
DIG 7		Starting and control circuits for gas discharge lamp using transistors

Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231

tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

---

Last Modified: 6 October 2000