US PATENT SUBCLASS 313 / 537
.~ Having a control electrode


Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

523  DF  PHOTOSENSITIVE {12}
537.~ Having a control electrode


DEFINITION

Classification: 313/537

Having a control electrode:

(under subclass 523) Subject matter including an electrical element to control the electrical current flow in the operation of the lamp or discharge device.

(1) Note. In addition to electrodes to control the current produced by the lamp or discharge device, there are elements which emit electrons under the action of radiation to control the current produced by the lamp or discharge device.

(2) Note. The term "control" includes the rate of current flow, the focusing of the current in the device, and separation of positive ions resulting from gas bombarment within the device.

(3) Note. The control electrode may be photosensitive rather than acting in an electrostatic manner to influence the current within the device. The control electrode can be controlled by photosensitive means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

308, for discharge device including a control electrode.

SEE OR SEARCH CLASS 250, Radiant Energy,

222.1+, for photocell circuit or apparatus.

315, Electric Lamp and Discharge Devices: Systems,

149+, for systems having a lamp or discharge device to control a lamp or discharge device.