US PATENT SUBCLASS 352 / 219
.~.~ Single drive (e.g., disc type)

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

204  DF  SHUTTERS {3}
208  DF  .~ Rotary {7}
219.~.~ Single drive (e.g., disc type) {1}
220  DF  .~.~.~> Variable number of blades

DEFINITION

Classification: 352/219

(under subclass 208) Subject matter wherein the blades form a unitary structure at right angles to the axis of rotation.

(1) Note. The light interrupting means is considered a unitary structure if its component parts are relatively fixed in operation and have a common drive. Subclass 214 above provides for axially spaced independently driven blade.