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Class Number: 307
Class Title: ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS
Subclass Subclass
Number Title
1 SUPERIMPOSED UNLIKE CURRENTS
2 .AC and DC sources
3 .Different frequencies or phase
4 .Different voltages
5 ..Series-connected
6 ...Plural converters
7 ....Induction transformer
8 ...Plural generators
9.1 VEHICLE MOUNTED SYSTEMS
10.1 .Automobile
10.2 ..Antitheft
10.3 ...Ignition or starting circuit lock
10.4 ....Manual code input (e.g., push button)
10.5 ....Coded record input (e.g., IC card)
10.6 ..Ignition or starter circuits
10.7 ..Battery protection
10.8 ..Lighting circuits
11 PLURAL LOAD CIRCUIT SYSTEMS
12 .Common conductor or return type
13 ..Polyphase
14 ...Phase balancing
15 ..Voltage divider type
16 ..Plural output generators
17 .Transformer connections
18 .Plural sources of supply
19 ..Interconnected for energy transfer
20 ...With control of magnitude of energy transfer
21 ...Diverse sources
22 ....AC and DC
23 ..Substitute or alternate source
24 ..With control of magnitude of current or power
25 ..Diverse sources
26 ...AC and DC
27 ...Different frequencies
28 ...Different voltages
29 ..Selectively connected loads and/or sources
30 .Anticoupling of load circuits through same source
31 .Control of current or power
32 ..Load current proportioning or dividing
33 ..Constant magnitude control
34 ...By control of one or more load circuits
35 ..Limit control
36 .Serially connected load circuits
37 ..Selective series-parallel connections
38 .Selectively connected or controlled load circuits
39 ..Condition responsive
40 ..Code-controlled
41 ..Sequential or alternating
42 .Circuit arrangements or layouts
43 PLURAL SUPPLY CIRCUITS OR SOURCES
44 .One source floats across or compensates for other source
45 ..With intervening converterr
46 ...Storage battery or accumulator-type source
47 ..Dynamoelectric-type source
48 ..Storage battery or accumulator-type source
49 ...With series-connected auxiliary source
50 ...Tap-changing or variable number of cells
51 .Circulating- or inter-current control or prevention
52 .Load current control
53 ..Load current division
54 ...Serially connected sources
55 ...Fixed or predetermined ratio
56 ....Diverse-or unlike-type sources
57 ....Plural generators
58 ....Plural converters
59 ...Peak or excess load
60 ..Constant load or current
61 ...Serially connected sources
62 ..Load-limiting
63 ..Serially connected sources
64 .Substitute or emergency source
65 ..Plural substitute sources
66 ..Storage battery or accumulator
67 ...With intervening dynamoelectric machine
68 ..Dynamoelectric
69 .Sources distributed along load circuit
70 .Load transfer without paralleling sources
71 .Series-parallel connection of sources
72 .Diverse or unlike electrical characteristics
73 ..Differing frequencies
74 ..Differing capacities
75 ..Differing voltages
76 ...Generator sources
77 .Series-connected sources
78 ..Generator sources
80 .Selective or optional sources
81 ..Predetermined sequence
82 .Plural converters
83 .Plural transformers
84 .Plural generators
85 .Connecting or disconnecting
86 ..Condition responsive
87 ...Attainment of voltage, frequency or phase relationship
400 ELECTRETS
401 NONLINEAR REACTOR SYSTEMS (E.G., SATURABLE)
402 .Parametrons
403 ..Thin film parametrons
404 ..Using logic circuits
405 ..Using pump energizer
406 .Magnetic flip-flops
407 .Logic circuits
408 ..Multiaperture
409 ..Clocking, delay or transmission line
410 ..Nor, Not logic circuit
411 ..Exclusive Or, And logic circuit
412 .Driver circuits
413 .Signal sensor (e.g., current or frequency)
414 .Magnetic trigger devices
415 .Magnetic switching circuits
416 .Amplifiers using nonlinear reactors (i.e., magneticc
amplifiers)
417 ..With transistors
418 ..With feedback
419 .Magnetic pulse generator
420 ..Using multivibrator
421 ..With specified output waveform
422 .Multiaperture
423 ..Three apertures or ladder
424 .Parametric frequency converter
200.1 NONLINEAR SOLID-STATE DEVICE CIRCUIT OR SYSTEM
201 .Neuron circuits
202.1 .Fusible link or intentional destruct circuit or device
440 .Digital logic
441 ..Redundant
442 ..Fail-safe
443 ..Signal sensitivity or transmission integrity
444 ..Insulated gate charge transfer device
445 ..Functions of AND, OR, NAND, NOR, or NOT
446 ...Diverse device types or circuit combinations (e.g.,
FET-bipolar; TTL-DTL, transistor-tunnel diode)
447 ....Space discharge device (e.g., vacuum tube)
448 ...Field-effect transistor (FET)
449 ....Decoding circuit
450 ....Special FET
451 ....Complementary FET's
452 .....With clocking
453 ....With clocking
454 ...Bipolar (e.g., RTL, DCTL)
455 ....Emitter-coupled logic (ECL) (i.e., current mode logic (CML)
or emitter follower logic (EFL)
456 ....Transistor-transistor logic (TTL) or complementary
transistor logic (CTL)
457 ....Diode-transistor logic (DTL)
458 .....With metal semiconductor junction diode (e.g., Schottky
barrier or hot carrier diode)
459 ....Integrated injection logic (i.e., merged transistor logic
(MTL) or current hogging logic (CHL)
460 ...Diode
461 ....Negative resistance device
462 ...Superconductor (e.g., cryogenic)
463 ..Decoding
464 ..Threshold (e.g., majority, minority, or weighted inputs)
465 ..Multifunctional or programmable (e.g., universal, PLA, etc.)
465.1 ...Significant integrated structure layout or layout
interconnections
466 ...Bipolar
467 ....Emitter-coupled or emitter-follower logic
468 ...Field-effect transistor (FET)
469 ....Complementary FET's
470 ..Inhibitor
471 ..Exclusive function (e.g., exclusive-OR)
472 ...Half-adder or quarter-adder
473 ..Tri-state
474 ..Four or more state
475 ..Interface
476 ..Superconductor
477 ..Integrated injection logic
478 ..Negative resistancee
479 ..Frequency or phase
480 ..Clocking or synchronizing of logic stages or gates
481 ...Field-effect transistor (FET)
482 ..With capacitive bootstrapping
482.1 ..Significant integrated structure layout or layout
interconnections
219 .Redundant means
219.1 .Nonpulse frequency conversion
227 .Stepwave generator
228 .Sawtooth or sweep waveform
490 .Nonlinear analog circuit (e.g., nonlinear amplifier or function
generator)
491 ..With compensation or stabilizing means (e.g., for temperature,
component differences, power supply, etc.)
492 ..For logarithmic function generation
493 ..Including gain control means
494 ..Including differential-comparator circuitry
495 ...Having diverse-type transistor devices (e.g., FET-bipolar)
496 ...Having complementary symmetry (e.g., PNP-NPN; N-channel
FET-P-channel FET)
497 ...Having field-effect transistor device
498 ..Output a function of two or more analog inputs
499 ..Including diverse-type nonlinear devices (e.g., FET-bipolar,
diode transistor)
500 ..Including complementary symmetry
501 ..Including field-effect transistor device
502 ..Including negative resistance means (e.g., tunnel diode, punch
through transistor, back diode, etc.)
503 ..Including significant diode means
231 .Signal discriminating, comparing or selecting
510 ..By phase, time, or frequency sensitive circuit
511 ...With phase correction or control
512 ....For quadrature rejection or control
513 ....For phase splitting or reversing
514 ...With phase angle sensing (e.g., lead-lag discriminators)
515 ....Combined with transducer (e.g., shaft angle detection)
516 ....Using reference signal (e.g., fixed, strobe, sampled)
517 ...With time interval or rate of change (slope) detection
518 ...With pulse selection/detection or time
discrimination/decoding
519 ...With frequency to voltage conversion (e.g., speed detection,
antiskid circuits, etc.)
520 ...With unwanted signal elimination (e.g., active filter
circuits)
521 ....Adjustable (e.g., tunable filters)
522 ...With predetermined frequency selection
523 ....Including sampling or reference frequency
524 ....Including plural frequency detection
525 ...With comparison of two or more input frequencies
526 ....One a reference
527 ....For synchronization detection
528 ....With logic circuit
529 ...With mixing, synthesizing, or combining (adding, multiplying,
etc.) of signals
234 ..As to pulse width or spacing
350 ..As to amplitude
530 ...By sensing amplifier
351 ...Maximum or minimum amplitudee
352 ...Including details of sampling or holding
353 ....Sample and hold
354 ...Reference level crossover detecting (e.g., zero level)
355 ...Plural varying inputs compared one to another
356 ....Input provides varying reference signal
357 ....Three or more inputs
358 ...Input signal compared to reference derived therefrom
359 ....Reference derived therefrom by feedback
360 ...Input signal compared to plural fixed thresholds
361 ....Three or more thresholds
362 ...Input signal compared to single fixed threshold
363 ....Threshold determined by single circuit element
364 ....Plural sources of input signal
236 ..As to polarity
540 .Attenuation or control by limiting, clipping, or clamping
541 ..Using superconductive device
542 ..With transient or signal noise reduction
542.1 ...Contact bounce noise signal (i.e., chattering)
543 ...By filtering
544 ...By using diverse-type nonlinear devices (e.g., FET-bipolar;
transistor diode)
545 ...By using negative resistance device
546 ...By feedback limiting-clamping
547 ....Including controlled shunt-type circuit bypath
548 .....Using field-effect transistor
549 ...By controlled or biased shunt-type circuit bypath
550 ....Using only FET-type nonlinear device
551 ....Using only diode-type nonlinear device
552 ..Providing constant input-output amplitude level ratio
553 ...By feedback control
554 ....Including field-effect transistor
555 ..For controlling output wave shape characteristics
556 ...By filtering
557 ..In input or output circuit
558 ...For interstage coupling
559 ....Using diode
560 ...By using diverse-type nonlinear devices
561 ...By using only diode
562 ..Feedback
563 ...Using Schottky barrier diode
564 ..By using diverse-type nonlinear devices
565 ..By using only diode
566 ...Avalanche or negative resistance device (e.g., Zener diode,
tunnel diode, etc.)
567 ..By using only transistor
568 ...Field-effect type device
239 .Gating (i.e., switching)
240 ..Periodic switching (e.g., chopper)
241 ..Plural controlled paths
242 ...Parallel controlled paths
243 ...Converging controlled paths
244 ...Diverging controlled paths
245 ..Superconductive (e.g., cryogenic) device
246 ..Gate charges or discharges energy storage device
247.1 ..Gate driving or driven by multivibrator
248 ..Three or more electrode solid-state device gate
570 ...Diverse devices gate (e.g., FET-bipolar transistors, SCR-FET,
SCR-BIPOLAR))
249 ...Bilateral transistor
250 ....Plural
571 ...Field-effect transistor
572 ....Signal transmission integrity and spurious noise override
573 .....Control signal derived from or responsive to controlled
signal
574 ......FET hybrid device gate (e.g., depletion-enhancement,
JFET-IGFET)
575 ......Insulated gate FET (IGFET) (e.g., MOSFET) gate
576 .......Complementary metal oxide semiconductor (CMOS)
577 .....Insulated gate FET (IGFET) (e.g., MOSFET) gating
578 ......With capacitive bootstrapping
579 ......Complementary metal oxide semiconductor (CMOS)
580 ....Responsive to external effect
581 ....FET hybrid device gate (e.g., depletion-enhancement,
JFET-IGFET)
582 ....Synchronous or clocking (phase) control
583 .....Using insulated gate FET (IGFET)
584 ....Insulated gate FET (IGFET) (e.g., MOSFET)
585 .....Complementary metal oxide semiconductor (CMOS)
630 ...Negative resistance device (e.g., silicon controlled
rectifier, thyristor)
631 ....Particular device (e.g., significant structure, radiation
responsive, etc.)
632 .....Triac
633 .....GTO (i.e., gate turnoff)
634 .....N-gate
635 .....Junctionless device (e.g., Ovshinsky effect switch)
636 .....PUT (i.e., programmable unijunction transistor)
637 .....Four electrodes
638 ....Particular topology
639 .....DC supply
640 ......Plural devices
641 .......Series anode-cathode paths
642 .......With commutating means
643 .....AC supply
644 ......Device in bridge
645 ......Plural devices
646 .......Inverse parallel
647 ......Zero point switching
648 .....Complex wave supply
253 ...Conventional transistor
254 ....Plural
255 .....Opposite conductivity (i.e., complementary)
256 ..Two electrode solid-state device gate
257 ...Bridge circuit
258 ...Negative resistance
259 ...With conventional diode
260 .Signal shaping, converting or generating
261 ..Signal conversion (e.g., sine wave to pulse, sawtooth to
square wave, etc.)
262 ..Phase or polarity control
263 ..Slope control
264 ..Amplitude control
265 ..Pulse duration or width control
266 ...Pulse shortening
267 ...Pulse lengthening
268 ..Pulse shapingg
269 ..Clocking, synchronizing or timing
270 ..Current driving means
271 ..Frequency or repetition rate control
272.1 ..One or more stable-state circuits
272.2 ...Master-slave bistable latch
272.3 ...Initializing, resetting, or protecting a steady state
condition
273 ...Monostable
274 ....Negative resistance device circuits
275 ....Blocking oscillator
276 ...Convertible circuits (bistable to monostable and vice versa,
etc.)
277 ...Superconductive (e.g., cryogenic) impact ionization and thin
film devices
278 ...Hall and other external effect devices (light, heat,
mechanical force, etc., sensitive devices)
279 ...Including field-effect device
280 ...Minority carrier storage effect
281 ....Storage diodes (i.e., enhancement, Boff, step recovery, slow
reverse recovery diodes)
282 ...With transformer or saturable core device
283 ...Negative resistance transistors (e.g., avalanche, punch
through, unijunction transistor)
284 ....Four or more layer devices, (e.g., SCR, CTO, CR, trigistor)
285 ...Zener diode or capacitive diode
286 ...Negative resistance diodes having N-shape characteristic on
I-V Plot (e.g., tunnel diode, back diode, backward diode)
287 ...Negative resistance diodes having S-shape characteristic on
I-V Plot (e.g., four or more layer semiconductor devices)
288 ...Complementary transistors
289 ...Two or more stable state circuits with single transistor or
plural transistors of same conductivity type
290 ....Multivibrator with single cross-coupling path (e.g., Schmitt
trigger)
291 ....Multivibrator with at least two cross-coupling paths (e.g.,
Eccles-Jordan multivibrator)
292 .....Conventional diodes at input, output, or in cross-coupling
path
590 .Time control (e.g., delay)
591 ..Including significant compensation means (e.g., temperature or
device characteristic compensated delay)
592 ..For controlling switching operation
593 ...Utilizing multivibrator delay means
594 ...With field-effect device in delay means
595 ...Having plural delay means or signal paths for single control
means
596 ...Of plural switch means (e.g., sequential operation)
597 ...With controlled delay means (e.g., variable charge-discharge,
on delay/off-delay control)
598 ....Relay
599 ....Including negative resistance device in delay circuit (e.g.,
unijunction transistor, tunnel diode, SCR)
600 ..Interval
601 ...Pulse edge or angle delay (e.g., rising or falling edge
delayed response)
602 ...Having plural delay means or signal paths
603 ...With controlled delay means (e.g., feedback control, variable
charge/discharge, reset))
604 ....Using negative resistance device
605 ...Having particular circuit element or structure (e.g., FET,
complementary transistors, etc.)
606 ....Including delay line
607 .....Charge transfer device (e.g., charge-coupled or
bucket-brigade device)
608 ....Multivibrator or differential amplifier
296.1 .Including significant bias or power supply circuitry
296.2 ..Having particular substrate biasing
296.3 ..Power conservation or pulse type
296.4 ..Including signal protection or bias preservation
296.5 ...With field-effect transistor
296.6 ..Having stabilized bias or power supply level
296.7 ...With diverse type transistor devices
296.8 ...With field-effect transistors only
298 .Thin film
299.1 .Special three or more electrode solid-state device
circuit
299.2 ..Multiple-emitter transistor
299.3 ..Multiple-collector transistor
300 ..Minority carrier storage
301 ..Unijunction transistor
302 ..Transistor breakdown devices (e.g., avalanche, zener or punch
through)
303 ..Integrated structure
303.1 ...Significant layout or layout interconnections
303.2 ....Having field-effect transistor device
304 ..Field effect
305 ..Four or more layer devices (e.g., silicon-controlled
rectifier)
306 .Superconductive (e.g., cryogenic) device
307 ..Impact ionization
308 .External effects
309 ..Magnetic (e.g., Hall effect)
310 ..Temperature
311 ..Light
313 .Complementary transistors
314 .Saturable reactor
315 .Darlington connection
316 .Tube and transistor in same circuit
317.1 .Diode circuit
317.2 ..Schottky barrier diode
318 ..Two terminal breakdown devices (e.g., zener diode)
319 ..Minority carrier storage diode (e.g., enhancement diode)
320 ..Capacitive diode
321 ..Diode bridge circuit
322 .Negative resistance device having "N"-type curve on I-V Plot
(e.g., tunnel diode type)
323 ..Backward diode, unitunnel diode or tunnel rectifier
324 .Negative resistance device having "S"-type curve on I-V Plot
(e.g., PNPN diode type)
325 ..Hyperconductive diode (i.e., PNPM type)
326 PERSONNEL SAFETY OR LIMIT CONTROL FEATURES
327 .Parasitic current suppression
328 .Interlock
89 ANTI-INDUCTION OR COUPLING TO OTHER SYSTEMS
90 .Inducing current control
91 .Magnetic or electrostatic field control (e.g., shielding))
95 ANTI-ELECTROLYSIS
96 INTERMITTENT REGULATORY INTERRUPTION OF SYSTEM
97 .Condition responsive
98 COMBINED IMPEDANCE AND SWITCH SYSTEMS
99 .Condition responsive switch
100 SHUNTING OR SHORT CIRCUITING SYSTEMS
101 RESIDUAL OR REMANENT MAGNETISM CONTROL
102 STABILIZED, ANTI-HUNTING OR ANTIOSCILLATION SYSTEMS
103 WITH LINE DROP COMPENSATION
104 ELECTROMAGNET OR HIGHLY INDUCTIVE SYSTEMS
105 WITH HARMONIC FILTER OR NEUTRALIZER
106 WAVE FORM OR WAVE SHAPE DETERMINATIVE OR PULSE-PRODUCING
SYSTEMS
107 .With rectification or derectification
108 .With capacitor
109 CAPACITOR
110 .Parallel-charge, series-discharge (e.g., voltage doublers)
111 NONRESPONSIVE-TO-FREQUENCY-CHANGE SYSTEMS
112 SWITCHING SYSTEMS
113 .Plural switches
114 ..Lazy-man switch type
115 ..Selectively actuated
116 .Condition responsive
117 ..Light, heat, vibratory or radiant energy
118 ..Fluid pressure, density, level, velocity or humidity
119 ..Mechanical force
120 ...Speed, centrifugal or kinetic force
121 ....Inertia or acceleration
122 ....Direction of rotation
123 ....Differential speed between two bodies
124 ....Torque
125 ..Electrical
126 ...Power or energy
127 ...Polarity, phase sequence or reverse flow
128 ...AC or DC discriminating
129 ...Frequency
130 ...Voltage
131 ...Current
132 R .Repetitive make and break
132 E ..Electronically controlled relay
132 EA ...Responsive to physical condition
132 T ..Thermal relay
132 V ..Vibrating relay
132 M ..Miscellaneous
134 .With operation facilitating feature
135 ..Preliminary reduction in current or voltage of system
137 ..Switch contact conditioning
138 ...Polarity reversing
139 .Switch actuation
140 ..Power circuit controlled
141 ..With time delay or retardation means
141.4 ...Electrically initiated
141.8 ...Series connected switches
142 ..With locking, holding or braking means
143 ..Electrical actuator
144 ..Fluid-pressure actuator
145 WITH CURRENT COLLECTION OR TRANSFER
146 UNIDIRECTIONAL CONDUCTOR SYSTEMSS
147 CONDUCTOR ARRANGEMENTS OR STRUCTURE
148 .Multipart-conductor current equalization
149 MISCELLANEOUS SYSTEMS
150 .Power packs
151 .Conversion systems
152 .Rate of change responsive systems
153 .Generator control systems
154 .For particular load device
155 ..Plural diverse load devices
156 ...Structural load device combinations
157 ..Lamp or discharge device