Class   331	OSCILLATORS
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94.1

MOLECULAR OR PARTICLE RESONANT TYPE (E.G., MASER)

1R

AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS

2

. (1 indent ) Plural oscillators controlled

3

. (1 indent ) Molecular resonance stabilization

4

. (1 indent ) Search sweep of oscillator

5

. (1 indent ) Magnetron oscillator

6

. (1 indent ) Klystron oscillator

7

.. (2 indent ) Plural controls

8

. (1 indent ) Transistorized controls

9

. (1 indent ) Oscillator with distributed parameter-type discriminator

10

. (1 indent ) Plural A.F.S. for a single oscillator

11

.. (2 indent ) Plural comparators or discriminators

12

... (3 indent ) With phase-shifted inputs

13

.. (2 indent ) Motor control of oscillator

14

. (1 indent ) With intermittent comparison controls

15

. (1 indent ) Amplitude compensation

16

. (1 indent ) Tuning compensation

17

. (1 indent ) Particular error voltage control (e.g., intergrating network)

18

. (1 indent ) With reference oscillator or source

19

.. (2 indent ) Spectrum reference source

20

.. (2 indent ) T.V. sync type

21

... (3 indent ) Lock to power line

22

.. (2 indent ) Plural significant heterodyne stages

23

.. (2 indent ) Sensing modulation (e.g., frequency modulation controlled oscillator

24

... (3 indent ) With motor comparator

25

.. (2 indent ) Signal or phase comparator

26

... (3 indent ) Plural diode type

27

... (3 indent ) Plural active element (e.g., triodes)

28

... (3 indent ) Unilateral element (e.g., diode)

29

... (3 indent ) Electromechanical

30

. (1 indent ) With stable heterodyne oscillator or source

31

.. (2 indent ) Plural significant heterodyne stages

32

.. (2 indent ) With particular discriminator (e.g., LPF and HPF)

33

... (3 indent ) Plural diode type

34

. (1 indent ) Particular frequency control means

35

.. (2 indent ) Electromechanical (e.g., motor)

36R

.. (2 indent ) Reactance device (e.g., variable capacitors, saturable inductors, reactance tubes, etc.)

36C

... (3 indent ) Capacitor controlled AFC

36L

... (3 indent ) Inductor controlled AFC

1A

. (1 indent ) AFC with logic elements

37

BEAT FREQUENCY

38

. (1 indent ) Plural beating

39

.. (2 indent ) Single channel

40

. (1 indent ) Frequency or amplitude adjustment or control

41

. (1 indent ) Frequency stabilization

42

. (1 indent ) With particular signal combining means (e.g., cavity mixer)

43

.. (2 indent ) With filter in mixer output circuit

44

WITH FREQUENCY CALIBRATION OR TESTING

45

POLYPHASE OUTPUT

46

PLURAL OSCILLATORS

47

. (1 indent ) Oscillator used to vary amplitude or frequency of another oscillator

48

. (1 indent ) Adjustable frequency

49

. (1 indent ) Selectively connected to common output or oscillator substitution

50

. (1 indent ) Cascade or tandem connected

51

.. (2 indent ) Frequency dividers

52

.. (2 indent ) Semiconductor (e.g., transistor)

53

.. (2 indent ) Frequency multiplier

54

.. (2 indent ) Diverse-type oscillators

55

. (1 indent ) Synchronized, triggered or pulsed

56

. (1 indent ) 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

. (1 indent ) 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

. (1 indent ) Temperature or light responsive

67

WITH ELECTROMAGNETIC OR ELECTROSTATIC SHIELD

68

WITH OUTER CASING OR HOUSING

69

. (1 indent ) With temperature modifier

70

WITH TEMPERATURE MODIFIER

71

RAW A.C. USED AS SOURCE OF POWER OR BIAS

72

ELECTRON-COUPLED TYPE

73

. (1 indent ) Piezoelectric crystal resonator

74

COMBINED WITH PARTICULAR OUTPUT COUPLING NETWORK

75

. (1 indent ) Space discharge or unilaterally conductive device in output network

76

.. (2 indent ) Harmonic producing or selecting network

77

. (1 indent ) Wave filter

78

ELECTRICAL NOISE OR RANDOM WAVE GENERATOR

79

BEAM TUBE

80

. (1 indent ) With beam sweeping or deflecting means

81

. (1 indent ) With electron bunching or velocity variation means

82

.. (2 indent ) Traveling wave type

83

.. (2 indent ) Multicavity type (e.g., Klystron)

84

.. (2 indent ) Reflex type (i.e., with repeller electrode)

86

WITH MAGNETICALLY CONTROLLED SPACE DISCHARGE DEVICE (E.G., MAGNETRON)

87

. (1 indent ) With particular pulsing means

88

. (1 indent ) With frequency stabilization

89

. (1 indent ) With secondary emissive electrode

90

. (1 indent ) With frequency adjustment

91

. (1 indent ) With undesired mode suppression or selection means

92

RETARDING FIELD TUBE-TYPE OSCILLATORS (E.G., BARKHAUSEN KURZ)

93

. (1 indent ) With distributed parameter resonator

95

BUTTERFLY RESONATOR

96

WITH DISTRIBUTED PARAMETER RESONATOR

97

. (1 indent ) Tube enclosed by resonator structure

98

.. (2 indent ) Disk seal tube (e.g., lighthouse, pencil tube)

99

. (1 indent ) Parallel wire type

100

.. (2 indent ) Push-pull type

101

. (1 indent ) Coaxial or shielded line type

102

.. (2 indent ) 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

. (1 indent ) Transistors

109

.. (2 indent ) Amplitude stabilization and control

110

.. (2 indent ) Bridge type

111

.. (2 indent ) Relaxation oscillator

112

... (3 indent ) Blocking oscillator type

113R

... (3 indent ) Multivibrator type

113A

.... (4 indent ) Saturable core controlled converters

113S

.... (4 indent ) Converter using silicon control rectifiers

114

.. (2 indent ) Push-pull

115

.. (2 indent ) Negative resistance

116R

.. (2 indent ) Electromechanical resonator controlled

116FE

... (3 indent ) Field-effect transistor active element

116M

... (3 indent ) Electromechanical resonators other than piezoelectric crystals

117R

.. (2 indent ) L-C type

117FE

... (3 indent ) Field-effect transistor active element

117D

... (3 indent ) Distributed parameter resonator transistor oscillators

108A

.. (2 indent ) Use of complimentary-type transistors

108B

.. (2 indent ) Phase shift oscillator

108C

.. (2 indent ) Integrated circuit oscillators

108D

.. (2 indent ) Integrated modules with discrete elements oscillators

107DP

. (1 indent ) Significant distributed parameter resonator (e.g., cavity)

107P

.. (2 indent ) Parallel-connected oscillator devices

107SL

.. (2 indent ) Stripline type

107C

.. (2 indent ) Coaxial type

107A

. (1 indent ) Acoustoelectric device oscillators

107G

. (1 indent ) Gunn-type bulk effect device oscillators

107S

. (1 indent ) Superconductive device oscillators

107T

. (1 indent ) Tunnel diode oscillators

126

GASEOUS SPACE DISCHARGE DEVICE

127

. (1 indent ) Spark or open arc type

128

. (1 indent ) Drives shock excited L.C. circuit

129

. (1 indent ) Relaxation oscillator

130

.. (2 indent ) Plural gaseous devices

131

.. (2 indent ) Discharge device or rectifier in "C" or "L" charging or discharging circuit

132

NEGATIVE RESISTANCE OR NEGATIVE TRANSCONDUCTANCE OSCILLATOR

133

. (1 indent ) Secondary emission (e.g., dynatron)

134

. (1 indent ) Transitron type

135

PHASE SHIFT TYPE

136

. (1 indent ) Zero phase shift

137

. (1 indent ) With R.C. ladder-type phase shift network

138

BRIDGE TYPE

139

. (1 indent ) Piezoelectric crystal in bridge

140

. (1 indent ) R.C. or R.L. type

141

.. (2 indent ) Wien bridge

142

.. (2 indent ) Double T bridge

143

RELAXATION OSCILLATORS

144

. (1 indent ) Multivibrators

145

.. (2 indent ) With sync, triggering or pulsing circuit

146

. (1 indent ) Blocking oscillators

147

.. (2 indent ) Using discharge device with plural grids

148

.. (2 indent ) With 3 or more winding feedback transformers

149

.. (2 indent ) With sync, trigger, or pulsing circuit (e.g., self-pulsing)

150

. (1 indent ) Output supplied to another discharge device circuit

151

. (1 indent ) Involving resonant or inductive wave forming circuit or transformer

152

. (1 indent ) Multi-grid discharge device in charged capacitor circuit

153

. (1 indent ) With sync, trigger or pulsing circuit

154

ELECTROMECHANICAL RESONATOR

155

. (1 indent ) With optical, piezoelectric or acoustic coupling means

156

. (1 indent ) Vibrating reed or string type (e.g., tuning fork)

157

. (1 indent ) Magnetostrictive

158

. (1 indent ) Crystal

159

.. (2 indent ) Plural tube

160

.. (2 indent ) With means to limit crystal current or voltage

161

.. (2 indent ) With crystal substitution

162

.. (2 indent ) Plural crystals in circuit

163

.. (2 indent ) Crystal having three or more electrodes in circuit

164

.. (2 indent ) Anode or cathode to grid crystal circuit

165

SHOCK EXCITED RESONANT CIRCUIT

166

. (1 indent ) With keying means of the active element type (e.g., burst generator)

167

L-C TYPE OSCILLATORS

168

. (1 indent ) Plural tubes

169

. (1 indent ) Anode to cathode coupled or connected resonant circuit

170

. (1 indent ) Anode to grid coupled or connected resonant circuit

171

. (1 indent ) Grid to cathode coupled or connected resonant circuit

172

WITH SYNCHRONIZING, TRIGGERING OR PULSING CIRCUITS

173

. (1 indent ) Triggering or pulsing (e.g., burst generators)

174

.. (2 indent ) Self-quenched

175

FREQUENCY STABILIZATION

176

. (1 indent ) Temperature or current responsive means in circuit

177R

WITH FREQUENCY ADJUSTING MEANS

178

. (1 indent ) Cyclic frequency sweeping means (e.g., vibrato)

179

. (1 indent ) Step-frequency change (e.g., band selection, frequency-shift keying)

180

. (1 indent ) Reactance tube type

181

. (1 indent ) Variable inductance device (e.g., saturable core or adjustable vane inductor)

177V

. (1 indent ) With voltage sensitive capacitor

182

AMPLITUDE CONTROL OR STABILIZATION

183

. (1 indent ) Automatic

184

HAVING DISCHARGED DEVICE OR PARTICULAR CONSTRUCTION

185

WITH PARTICULAR SOURCE OF POWER OR BIAS VOLTAGE

186

. (1 indent ) Regulated

187

MISCELLANEOUS OSCILLATOR STRUCTURES

	FOREIGN ART COLLECTIONS

FOR000

CLASS-RELATED FOREIGN DOCUMENTS

	DIGESTS

DIG2

PHASE LOCKED LOOP HAVING LOCK INDICATING OR DETECTING MEANS

DIG3

LOGIC GATE ACTIVE ELEMENT OSCILLATOR

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