US PATENT SUBCLASS 361 / 173
.~.~.~ Light

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}
173.~.~.~ Light {3}
174  DF  .~.~.~.~> Light sensor controls its light path
175  DF  .~.~.~.~> Including electronic element {1}
177  DF  .~.~.~.~> Plural light sensors

DEFINITION

Classification: 361/173

Light:

(under subclass 170) Subject matter wherein a light responsive element is used to initiate the operation of the relay or solenoid.

SEE OR SEARCH CLASS

250, Radiant Energy,

200+, for photoelectric cell circuits not having a relay or solenoid as the last element controlled.

307, Electrical Transmission or Interconnection Systems,

117, for miscellaneous light responsive switching systems.

315, Electric Lamp and Discharge Devices: Systems,

149+, for electric lamp and discharge devices with radiant energy sensitive control means. 330, Amplifiers,

59, for amplifier systems including light controlled or activated devices.

331, Oscillators,

66, for light responsive devices combined with oscillators.