Class 331: OSCILLATORS ( Manual of U.S. Patent Classification )

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[Manual of Classification, Class Listing]

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

Class
331
OSCILLATORS

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Subclass		Title
ClassTitle		===> OSCILLATORS

94.1		MOLECULAR OR PARTICLE RESONANT TYPE (E.G., MASER)
1R		AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS
2		. Plural oscillators controlled
3		. Molecular resonance stabilization
4		. Search sweep of oscillator
5		. Magnetron oscillator
6		. Klystron oscillator
7		. . Plural controls
8		. Transistorized controls
9		. Oscillator with distributed parameter-type discriminator
10		. Plural A.F.S. for a single oscillator
11		. . Plural comparators or discriminators
12		. . . With phase-shifted inputs
13		. . Motor control of oscillator
14		. With intermittent comparison controls
15		. Amplitude compensation
16		. Tuning compensation
17		. Particular error voltage control (e.g., intergrating network)
18		. With reference oscillator or source
19		. . Spectrum reference source
20		. . T.V. sync type
21		. . . Lock to power line
22		. . Plural significant heterodyne stages
23		. . Sensing modulation (e.g., frequency modulation controlled oscillator
24		. . . With motor comparator
25		. . Signal or phase comparator
26		. . . Plural diode type
27		. . . Plural active element (e.g., triodes)
28		. . . Unilateral element (e.g., diode)
29		. . . Electromechanical
30		. With stable heterodyne oscillator or source
31		. . Plural significant heterodyne stages
32		. . With particular discriminator (e.g., LPF and HPF)
33		. . . Plural diode type
34		. Particular frequency control means
35		. . Electromechanical (e.g., motor)
36R		. . Reactance device (e.g., variable capacitors, saturable inductors, reactance tubes, etc.)
36C		. . . Capacitor controlled AFC
36L		. . . Inductor controlled AFC
1A		. AFC with logic elements
37		BEAT FREQUENCY
38		. Plural beating
39		. . Single channel
40		. Frequency or amplitude adjustment or control
41		. Frequency stabilization
42		. With particular signal combining means (e.g., cavity mixer)
43		. . With filter in mixer output circuit
44		WITH FREQUENCY CALIBRATION OR TESTING
45		POLYPHASE OUTPUT
46		PLURAL OSCILLATORS
47		. Oscillator used to vary amplitude or frequency of another oscillator
48		. Adjustable frequency
49		. Selectively connected to common output or oscillator substitution
50		. Cascade or tandem connected
51		. . Frequency dividers
52		. . Semiconductor (e.g., transistor)
53		. . Frequency multiplier
54		. . Diverse-type oscillators
55		. Synchronized, triggered or pulsed
56		. Parallel connected
57		RING OSCILLATORS
58		PLURAL FUNCTIONS SIMULTANEOUSLY
59		CONVERTIBLE (E.G., OSCILLATOR TO AMPLIFIER, ETC.)
60		SINGLE OSCILLATOR WITH PLURAL OUTPUT CIRCUITS
61		. Plural outputs of diverse wave form
62		WITH OSCILLATOR CIRCUIT PROTECTIVE MEANS
63		PROTECTIVE OF SAFETY DEVICES FOR PERSONNEL
64		WITH INDICATOR, SIGNAL, OR ALARM
65		WITH DEVICE RESPONSIVE TO EXTERNAL PHYSICAL CONDITION
66		. Temperature or light responsive
67		WITH ELECTROMAGNETIC OR ELECTROSTATIC SHIELD
68		WITH OUTER CASING OR HOUSING
69		. With temperature modifier
70		WITH TEMPERATURE MODIFIER
71		RAW A.C. USED AS SOURCE OF POWER OR BIAS
72		ELECTRON-COUPLED TYPE
73		. Piezoelectric crystal resonator
74		COMBINED WITH PARTICULAR OUTPUT COUPLING NETWORK
75		. Space discharge or unilaterally conductive device in output network
76		. . Harmonic producing or selecting network
77		. Wave filter
78		ELECTRICAL NOISE OR RANDOM WAVE GENERATOR
79		BEAM TUBE
80		. With beam sweeping or deflecting means
81		. With electron bunching or velocity variation means
82		. . Traveling wave type
83		. . Multicavity type (e.g., Klystron)
84		. . Reflex type (i.e., with repeller electrode)
86		WITH MAGNETICALLY CONTROLLED SPACE DISCHARGE DEVICE (E.G., MAGNETRON)
87		. With particular pulsing means
88		. With frequency stabilization
89		. With secondary emissive electrode
90		. With frequency adjustment
91		. With undesired mode suppression or selection means
92		RETARDING FIELD TUBE-TYPE OSCILLATORS (E.G., BARKHAUSEN KURZ)
93		. With distributed parameter resonator
95		BUTTERFLY RESONATOR
96		WITH DISTRIBUTED PARAMETER RESONATOR
97		. Tube enclosed by resonator structure
98		. . Disk seal tube (e.g., lighthouse, pencil tube)
99		. Parallel wire type
100		. . Push-pull type
101		. Coaxial or shielded line type
102		. . Push-pull type
103		TUBE STRUCTURE FORMS INDUCTIVE PART OF RESONANT CIRCUIT
104		TRANSIT TIME OSCILLATOR
105		WITH PARASITIC OSCILLATION CONTROL OR PREVENTION MEANS
106		WITH PERIODOIC OR REPETITIOUS AMPLITUDE VARYING MEANS (E.G., TREMOLO)
107R		SOLID STATE ACTIVE ELEMENT OSCILLATOR
108R		. Transistors
109		. . Amplitude stabilization and control
110		. . Bridge type
111		. . Relaxation oscillator
112		. . . Blocking oscillator type
113R		. . . Multivibrator type
113A		. . . . Saturable core controlled converters
113S		. . . . Converter using silicon control rectifiers
114		. . Push-pull
115		. . Negative resistance
116R		. . Electromechanical resonator controlled
116FE		. . . Field-effect transistor active element
116M		. . . Electromechanical resonators other than piezoelectric crystals
117R		. . L-C type
117FE		. . . Field-effect transistor active element
117D		. . . Distributed parameter resonator transistor oscillators
108A		. . Use of complimentary-type transistors
108B		. . Phase shift oscillator
108C		. . Integrated circuit oscillators
108D		. . Integrated modules with discrete elements oscillators
107DP		. Significant distributed parameter resonator (e.g., cavity)
107P		. . Parallel-connected oscillator devices
107SL		. . Stripline type
107C		. . Coaxial type
107A		. Acoustoelectric device oscillators
107G		. Gunn-type bulk effect device oscillators
107S		. Superconductive device oscillators
107T		. Tunnel diode oscillators
126		GASEOUS SPACE DISCHARGE DEVICE
127		. Spark or open arc type
128		. Drives shock excited L.C. circuit
129		. Relaxation oscillator
130		. . Plural gaseous devices
131		. . Discharge device or rectifier in "C" or "L" charging or discharging circuit
132		NEGATIVE RESISTANCE OR NEGATIVE TRANSCONDUCTANCE OSCILLATOR
133		. Secondary emission (e.g., dynatron)
134		. Transitron type
135		PHASE SHIFT TYPE
136		. Zero phase shift
137		. With R.C. ladder-type phase shift network
138		BRIDGE TYPE
139		. Piezoelectric crystal in bridge
140		. R.C. or R.L. type
141		. . Wien bridge
142		. . Double T bridge
143		RELAXATION OSCILLATORS
144		. Multivibrators
145		. . With sync, triggering or pulsing circuit
146		. Blocking oscillators
147		. . Using discharge device with plural grids
148		. . With 3 or more winding feedback transformers
149		. . With sync, trigger, or pulsing circuit (e.g., self-pulsing)
150		. Output supplied to another discharge device circuit
151		. Involving resonant or inductive wave forming circuit or transformer
152		. Multi-grid discharge device in charged capacitor circuit
153		. With sync, trigger or pulsing circuit
154		ELECTROMECHANICAL RESONATOR
155		. With optical, piezoelectric or acoustic coupling means
156		. Vibrating reed or string type (e.g., tuning fork)
157		. Magnetostrictive
158		. Crystal
159		. . Plural tube
160		. . With means to limit crystal current or voltage
161		. . With crystal substitution
162		. . Plural crystals in circuit
163		. . Crystal having three or more electrodes in circuit
164		. . Anode or cathode to grid crystal circuit
165		SHOCK EXCITED RESONANT CIRCUIT
166		. With keying means of the active element type (e.g., burst generator)
167		L-C TYPE OSCILLATORS
168		. Plural tubes
169		. Anode to cathode coupled or connected resonant circuit
170		. Anode to grid coupled or connected resonant circuit
171		. Grid to cathode coupled or connected resonant circuit
172		WITH SYNCHRONIZING, TRIGGERING OR PULSING CIRCUITS
173		. Triggering or pulsing (e.g., burst generators)
174		. . Self-quenched
175		FREQUENCY STABILIZATION
176		. Temperature or current responsive means in circuit
177R		WITH FREQUENCY ADJUSTING MEANS
178		. Cyclic frequency sweeping means (e.g., vibrato)
179		. Step-frequency change (e.g., band selection, frequency-shift keying)
180		. Reactance tube type
181		. Variable inductance device (e.g., saturable core or adjustable vane inductor)
177V		. With voltage sensitive capacitor
182		AMPLITUDE CONTROL OR STABILIZATION
183		. Automatic
184		HAVING DISCHARGED DEVICE OR PARTICULAR CONSTRUCTION
185		WITH PARTICULAR SOURCE OF POWER OR BIAS VOLTAGE
186		. Regulated
187		MISCELLANEOUS OSCILLATOR STRUCTURES
		******************************
		DIGESTS
		******************************
DIG 2		Phase locked loop having lock indicating or detecting means
DIG 3		Logic gate active element oscillator

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Last Modified: 6 October 2000

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

Class 331 OSCILLATORS

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

Class
331
OSCILLATORS