Class   178	TELEGRAPHY
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1

MISCELLANEOUS

2R

SYSTEMS

3

. (1 indent ) Automatic

4

.. (2 indent ) Printing

4.1R

... (3 indent ) Remote control

4.1A

.... (4 indent ) Radio-controlled

4.1B

.... (4 indent ) Called station identification answer back system

4.1C

.... (4 indent ) Revertive signaling

15

.. (2 indent ) Photographic recorder

16

.. (2 indent ) Current reversing

17R

.. (2 indent ) Transmitters or recorders

17.5

... (3 indent ) Storing

17A

... (3 indent ) Tape and/or keyboard

17B

... (3 indent ) Tape control

17C

... (3 indent ) Keyboard

17D

... (3 indent ) Light, capacity, pneumatic sensing

17E

... (3 indent ) Overlap

18.01

. (1 indent ) Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)

18.02

.. (2 indent ) Error correction

18.03

.. (2 indent ) Writing digitizer pad

18.04

... (3 indent ) Acoustical (e.g., vibration, ultrasonic, etc.)

18.05

... (3 indent ) Resistive

18.06

... (3 indent ) Capacitive

18.07

... (3 indent ) Inductive

18.08

.... (4 indent ) Having shield

18.09

... (3 indent ) Optical

18.11

... (3 indent ) With illumination

19.01

.. (2 indent ) Writing digitizer stylus

19.02

... (3 indent ) Acoustical stylus

19.03

... (3 indent ) Capacitive or inductive stylus

19.04

... (3 indent ) Pressure stylus

19.05

... (3 indent ) Light pen

19.06

... (3 indent ) AC source

19.07

.... (4 indent ) Multifrequency

20.01

.. (2 indent ) Writing digitizer circuit

20.02

... (3 indent ) Electrical filter or multiplexer

20.03

... (3 indent ) Sampling circuit

20.04

... (3 indent ) Phase detecting

21

. (1 indent ) Stenographic

23R

. (1 indent ) Printing

24

.. (2 indent ) Bulletin

25

.. (2 indent ) Page

26.1

... (3 indent ) Translators

27

... (3 indent ) Selectors

28

... (3 indent ) With type-wheel recorder

29

.... (4 indent ) Recorders

30

.. (2 indent ) Character elements

31

.. (2 indent ) Multiple-line circuit

32

... (3 indent ) With type-wheel recorder

33R

.. (2 indent ) Selectors

34

... (3 indent ) With type-wheel recorder

33MP

... (3 indent ) Monopulse

33A

... (3 indent ) Double selectors

35

.. (2 indent ) With type-wheel recorder

36

.. (2 indent ) Recorders

37

... (3 indent ) Privacy (e.g., mechanical packaging or covering of printed message)

38

... (3 indent ) With type wheel

39

.... (4 indent ) Multiple

40

....• (5 indent ) Shifting devices

41

.... (4 indent ) Unisons

42

... (3 indent ) Paper guiding or feeding

23A

.. (2 indent ) Error detection in printers

43

. (1 indent ) Space induction

45

. (1 indent ) Loaded circuit

46

.. (2 indent ) Loading coils

47

. (1 indent ) Harmonic or reed

48

.. (2 indent ) Recorders and receivers

49

. (1 indent ) Superposed current

62

. (1 indent ) Chemical

63R

. (1 indent ) Cable or capacity

63A

.. (2 indent ) Cable repeaters

63B

.. (2 indent ) Cable transmitters

63C

.. (2 indent ) Cable receivers

63D

.. (2 indent ) Cable mechanical structure

63E

.. (2 indent ) Distortion correction and artificial lines

63F

.. (2 indent ) Direction reversing

64

. (1 indent ) Coil transformer

65

. (1 indent ) Dynamo

66.1

. (1 indent ) Alternating or pulsating current

116

.. (2 indent ) Spark gap or arc discharge

117

.. (2 indent ) Coherer

66.2

.. (2 indent ) Transmitter keying

67.1

.. (2 indent ) Modified semicycle

69R

. (1 indent ) Line-clearing and circuit maintenance

69M

.. (2 indent ) Frequency measuring and compensating

69N

.. (2 indent ) Precorrectors

69A

.. (2 indent ) Distortion measuring

69B

.. (2 indent ) Interference neutralizing

69C

.. (2 indent ) Balancing duplex cables

69D

.. (2 indent ) Zero wander neutralizers

69E

.. (2 indent ) Leakage compensation

69F

.. (2 indent ) Neutralizing line capactive discharge

69G

.. (2 indent ) Monitoring, alarm and pilot signals

69H

.. (2 indent ) Reiterative

69K

.. (2 indent ) Misc. gas-filled tube circuits

69L

.. (2 indent ) Check back

69.6

. (1 indent ) Call

2A

. (1 indent ) Simplex-reversing periodic

2B

. (1 indent ) Code changers

2C

. (1 indent ) Way stations; party lines

2D

. (1 indent ) Round robins

2E

. (1 indent ) Satellite

2F

. (1 indent ) Coin-controlled, connecting, recording

70R

REPEATERS

71.1

. (1 indent ) Automatic in either direction

72

.. (2 indent ) Mechanical circuit retainer

73

.. (2 indent ) Multiple line

71.2

.. (2 indent ) Distributor

71.3

.. (2 indent ) Mechanical

71.4

.. (2 indent ) Generator

71.5

.. (2 indent ) Artificial line and relay

71.6

.. (2 indent ) Vacuum tube and gas magnetron

71.7

.. (2 indent ) Code transformer

71.8

.. (2 indent ) Oscillatory

71.9

.. (2 indent ) One-way repeater switched

71.11

.. (2 indent ) Piezoelectric

71.12

.. (2 indent ) Vacuum tube and relay

71.13

.. (2 indent ) Relay only

71.14

.. (2 indent ) Supervisory, alarm, monitor

70A

. (1 indent ) Relays only

70B

. (1 indent ) Vibrating relays

70C

. (1 indent ) Rotary distributors

70D

. (1 indent ) Mechanical

70E

. (1 indent ) Tuning forks

70F

. (1 indent ) Vacuum tubes

70G

.. (2 indent ) With rotary distributors

70H

. (1 indent ) Gas tubes

70K

.. (2 indent ) And distributors

70M

. (1 indent ) Magnetic

70N

. (1 indent ) Magnetron repeaters

70P

. (1 indent ) Photocell

70Q

. (1 indent ) Piezoelectric

70J

. (1 indent ) Generator

70S

. (1 indent ) Having a carrier wave input

70T

. (1 indent ) Oscillatory

70TS

. (1 indent ) Using transistors

74

CIRCUITS

75

. (1 indent ) Manipulating switch

76

. (1 indent ) Retarded closer

77

COMBINED INSTRUMENTS

78

. (1 indent ) Portable sets

79

CODE TRANSMITTERS

80

. (1 indent ) Combined instruments

81

.. (2 indent ) With typewriter

82R

. (1 indent ) Automatic dot

82B

.. (2 indent ) With electromagnet

82A

.. (2 indent ) And dash

83

. (1 indent ) Rotary contact

84

.. (2 indent ) Drum

85

. (1 indent ) Oscillating contact

86

. (1 indent ) Reciprocating contact

118

RECEIVERS

89

. (1 indent ) Code recorders

90

.. (2 indent ) Photographic

91

.. (2 indent ) Siphon

92

.. (2 indent ) Indenting or perforating

93

.. (2 indent ) Polarized

94

.. (2 indent ) Pyrographic

95

.. (2 indent ) Stop mechanisms

96

.. (2 indent ) Inking devices

97

.. (2 indent ) Double-tape movement

98

. (1 indent ) Sounders

99.1

.. (2 indent ) Private (e.g., acoustically shielded)

100

.. (2 indent ) Augmenting

119

. (1 indent ) Optical member

120

. (1 indent ) With electron tube or solid-state device

101

KEYS

102

. (1 indent ) Multiple contact

103

. (1 indent ) Multiple line

104

. (1 indent ) Self-closing

105

. (1 indent ) Reversible

106

. (1 indent ) Shifting contact point

107

. (1 indent ) Knife-edge pivot

108

. (1 indent ) Horizontal swing

109

. (1 indent ) Spring pivot

110

. (1 indent ) Finger buttons

111

TAPES

112

. (1 indent ) Perforated

114

INSTRUMENT TABLES

115

LEARNERS' INSTRUMENTS

	FOREIGN ART COLLECTIONS

FOR000

CLASS-RELATED FOREIGN DOCUMENTS

Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.

SYSTEMS

FOR100

. (1 indent ) Writing (178/18)

FOR101

.. (2 indent ) Alternating current (178/19)

FOR102

.. (2 indent ) Variable direct current (178/20)

FOR103

. (1 indent ) Stylus and tablet (178/87)

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