US PATENT SUBCLASS 178 / 101
KEYS

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

101KEYS {9}
102  DF  .~> Multiple contact
103  DF  .~> Multiple line
104  DF  .~> Self-closing
105  DF  .~> Reversible
106  DF  .~> Shifting contact point
107  DF  .~> Knife-edge pivot
108  DF  .~> Horizontal swing
109  DF  .~> Spring pivot
110  DF  .~> Finger buttons

DEFINITION

Classification: 178/101

(under the class definition) Manually operated lever instruments for making and breaking the circuit to transmit at will dash or dot or code signals.

SEE OR SEARCH CLASS

116, Signals and Indicators,

18, for mechanical instruments or devices for simulating code signals.

361, Electricity: Electrical Systems and Devices,

139+, for control circuits for electromagnetic devices. See subclass 211 for nonelectromagnetic relay control circuit.