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1

CASCADED OR COMBINED, DIVERSE CONVERSIONS IN WHICH THE FREQUENCY OR PHASE OR COMBINED CONVERSION IS WITHOUT INTERMEDIATE CONVERSION TO D.C.

2

Current and phase (e.g., D.C.-Ph1-Ph2)

3

Phase 1 to phase 2 to D.C.

4

Single phase to polyphase to D.C.

5

With interphase transformer

6

Including plural anode/single cathode device

7

With dynamic rectifier in phase 2 to D.C. stage (e.g., commutator type)

8

Current and frequency (e.g., f1-f2-D.C.)

9

Combined phase and frequency conversion (i.e., Ph1f1-Ph2f2)

10

By semiconductor device converter

11

By electron tube converter

12

By saturable reactor converter

13

CURRENT CONVERSION

14

Cryogenic

15

Including D.C.-A.C.-D.C. converter

16

Having transistorized inverter

17

Bridge type

18

Single-ended, self-oscillating type

19

With automatic control of the magnitude of output voltage or current

20

Single-ended, separately-driven type

21.01

With automatic control of the magnitude of output voltage or current

21.02

For resonant-type converter

21.03

Having particular zero-switching control circuit (e.g., for quasi-resonant converter, etc.)

21.04

For forward-type converter

21.05

Having digital logic

21.06

Having synchronous rectifier

21.07

Having feedback isolation (e.g., optoisolator, transformer coupled, etc.)

21.08

Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.)

21.09

Having output current feedback

21.1

Utilizing pulse-width modulation

21.11

Having particular pulse-width modulation circuit

21.12

For flyback-type converter

21.13

Having digital logic

21.14

Having synchronous rectifier

21.15

Having feedback isolation (e.g., optoisolator, transformer coupled, etc.)

21.16

Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.)

21.17

Having output current feedback

21.18

Utilizing pulse-width modulation

22

Double-ended (i.e., push-pull), self-oscillating type

23

With automatic control of the magnitude of output voltage or current

24

Double-ended (i.e., push-pull), separately-driven type

25

With automatic control of the magnitude of output voltage or current

26

Utilizing pulse-width modulation

27

Having thyristor inverter (e.g., SCR, etc.)

28

With automatic control of the magnitude of output voltage or current

29

Having electron-tube inverter

30

Single-ended type

31

Double-ended type (i.e., push-pull)

32

Rotary-commutator-type inverter

33

Vibrator-type inverter

34

Including an A.C.-D.C.-A.C. converter

35

For transfer of power via a high voltage D.C. link (i.e., HVDC transmission system)

36

For change of phase (e.g., number of phases)

37

By semiconductor rectifier and inverter

38

By electron tube rectifier and inverter

39

With means to introduce or eliminate frequency components

40

In inverter systems

41

By pulse modulation technique (e.g., PWM, PPM, etc.)

42

Including notching

43

By step-wave, amplitude summation technique

44

In rectifier systems

45

Including means for reducing ripples from the output

46

With ripple responsive, automatic control

47

With low pass L or LC filter

48

For semiconductor rectifier

49

With starting arrangement

50

Including automatic or integral protection means

51

For high voltage D.C. transmission systems

52

For rectifiers

53

Semiconductor type

54

Thyristor

55

For inverters

56.01

Transistor inverter

56.02

Bridge type

56.03

Having current protection (e.g., over current, short, etc.)

56.04

Including short protection across a series-connected pair of transistors (e.g., shoot-through protection, etc.)

56.05

Having voltage protection

56.06

Double-ended type

56.07

Having current protection

56.08

Having voltage protection

56.09

Single-ended type

56.1

Having current protection

56.11

Having voltage protection

56.12

Transient protection (e.g., snubber, etc.)

57

Thyristor inverter

58

Bridge type

59

With voltage multiplication means (i.e., V out > V in)

60

Including semiconductor means

61

For rectifying

62

With voltage division by storage type impedance (i.e., V out)

63

With means to selectively provide D.C. of either polarity

64

With interphase transformer

65

Having plural converters for single conversion

66

Including plural anodes and single cathode (e.g., vapor arc device)

67

Plural rectifiers

68

In series (e.g., series SCR's, bridge circuits, etc.)

69

In parallel

70

Including semiconductor device

71

Plural inverters

72

Master-slave

73

Constant current to constant voltage or vice versa

74

With condition responsive means to control the output voltage or current

75

Including inductive integral sensing and control means (e.g., ferroresonant circuit)

76

Including integral sensing and control means for rectifier

77

With semiconductor conversion means

78

Cooperating separate sensing and control means

79

Including plural sensing or control means

80

With transistor as control means in the line circuit

81

By rectifier

82

With inductive control means in the line circuit

83

With electron tube or valve as control means in the line circuit

84

For rectifier system

85

With thyristor control means in the line circuit

86

External to rectifier (e.g., pre or post regulation)

87

For plural phase to D.C. rectifier

88

For full wave rectifier with at least 1 three electrode device

89

With transistor control means in the line circuit

90

With inductive control means in the line circuit

91

Saturable reactor (e.g., magnetic amplifier)

92

In plural phase to D.C. system

93

With plural control windings

94

With electron tube or valve control means in the line circuit

95

For inverter

96

With thyristor control means in the line circuit

97

With transistor control means in the line circuit

98

For bridge-type inverter

99

With electron tube or valve control means in the line circuit

100

With manual control of the output voltage or current

101

With auxiliary bucking or boosting EMF

102

Using dynamoelectric machine converter

103

Plural collector type

104

Having plural field windings

105

Having auxiliary motor drive

106

By circuit interrupter type

107

Rotating

108

Rectifier (i.e., A.C.-D.C.)

109

Inverter (i.e., D.C.-A.C.)

110

Vibrating

111

Using electronic tube converter

112

With gap in open atmosphere

113

With cathode element control

114

In rectifier systems

115

With retarding or delaying control means

116

With discharge control means (e.g., grid)

117

D.C. bias control

118

Phase angle control

119

Particular waveform grid excitation

120

In inverter systems

121

With discharge control means (e.g., grid)

122

Grid-like electrode

123

Using semiconductor-type converter

124

In chopper converter systems

125

In rectifier systems

126

Diode

127

Transistor

128

Thyristor

129

Plural phase to D.C.

130

With magnetic control means

131

In transistor inverter systems

132

Bridge type

133

Double ended (i.e., push-pull) type

134

Separately driven

135

In thyristor inverter systems

136

Bridge type

137

D.C. to plural phase

138

With commutation means

139

Double ended (i.e., push-pull) type

140

Using impedance-type converter

141

With cooling means

142

With means to connect the input to diverse power sources

143

110/220 Volts A.C. in, constant 110 Volts D.C. out

144

With conductive support mounting

145

Adapted for use with alternators

146

Encased in plug housing

147

Integrated circuit

148

PHASE CONVERSION (PH1-PH2) WITHOUT INTERMEDIATE CONVERSION TO D.C.

149

With automatic voltage magnitude or phase angle control

150

By dynamoelectric machine converter

151

By electron tube converter

152

By induction-type converter

153

Transformer type

154

Stationary

155

With passive phase shift element

156

By passive phase shift elements

157

FREQUENCY CONVERSION (F1-F2) WITHOUT INTERMEDIATE CONVERSION TO D.C.

158

By varactor

159

By semiconductor converter

160

Thyristor type

161

Positive and negative groups

162

Including blanking or inhibiting means

163

Transistor type

164

With automatic voltage magnitude control

165

With automatic frequency control

166

By electron tube converter

167

With discharge control means

168

Including plural anodes and single cathode device (e.g., vapor arc device)

169

Thyratron type

170

By induction-type converter

171

Transformer

172

Saturable core

173

LC circuit

174

Dynamoelectric machine

175

Motor generator type

176

Including induction motor

177

By circuit interrupter converter

178

MISCELLANEOUS

Cryogenic

Including D.C.- A.C.- D.C. converter

Bridge type

FOR100

With automatic control of the magnitude of the output voltage or current (363/21)

FOR101

Semiconductor type (363/56)

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