US PATENT SUBCLASS 361 / 179
.~.~.~ Proximity or contact

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}
170  DF  .~.~ Condition responsive (e.g., external circuit condition) {9}
179.~.~.~ Proximity or contact {2}
180  DF  .~.~.~.~> Metal presence or absence responsive
181  DF  .~.~.~.~> Capacitance change-type

DEFINITION

Classification: 361/179

Proximity or contact:

(under subclass 170) Subject matter wherein the device or circuit which initiates the operation of the relay or solenoid is responsive to an object coming very close to or touching the device.