US PATENT SUBCLASS 178 / 104
.~ Self-closing

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

101  DF  KEYS {9}
104.~ Self-closing

DEFINITION

Classification: 178/104

(under subclass 101) Telegraph keys which automatically close

the line circuit when released or left open by the operator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

76, for other devices for closing circuits.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

33+, for retarded circuit controllers generally.