US PATENT SUBCLASS 361 / 207
.~.~.~ Electrostatic


Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

139  DF  CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES {7}
160  DF  .~ For relays or solenoids {11}
206  DF  .~.~ Particular relay or solenoid {4}
207.~.~.~ Electrostatic


DEFINITION

Classification: 361/207

Electrostatic:

(under subclass 206) Subject matter having electrostatic means.

(1) Note. The electrostatic means may, for example, be a piezoelectric crystal which is an integral part of a relay and which is utilized to operate the relay contacts or the electrostatic means may be in the circuit which actuates the relay or electromagnet as, for example, an electrostatic dry clutch which is utilized in a control apparatus in the input circuit to the relay electromagnet.