US PATENT SUBCLASS 396 / 246
.~ Shutter speed function only

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

213  DF  EXPOSURE CONTROL CIRCUIT {23}
246.~ Shutter speed function only {6}
247  DF  .~.~> Shutter lag correction
248  DF  .~.~> Piezoelectric driven
249  DF  .~.~> Electro-optical element
250  DF  .~.~> With digital counter
251  DF  .~.~> Having RC circuit for timing {4}
256  DF  .~.~> Stepping motor

DEFINITION

Classification: 396/246

Shutter speed function only:

(under subclass 213) Subject matter wherein the exposure control circuit determines an exposure time to control a shutter mechanism only.

(1) Note. Manual control circuit for both Av and Tv is classified in subclass 213.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169, for shutter speed function control in exposure control circuit with illumination mode.

452+, for a camera shutter, per se.