US PATENT SUBCLASS 396 / 478
.~.~.~ Including cam means

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

439  DF  CAMERA DETAIL {15}
452  DF  .~ Shutter {12}
475  DF  .~.~ Having mechanically delayed closing {3}
478.~.~.~ Including cam means

DEFINITION

Classification: 396/478

Including cam means:

(under subclass 475) Subject matter wherein the means to hold the shutter open is provided with a surface of fixed points of varying distance from a fixed point which surface is in contact with a follower to vary the time the shutter remains open.

SEE OR SEARCH THIS CLASS, SUBCLASS:

, FOR 900, for a foreign art collection involving a pivoting or rotating blade shutter having a cam retard means.