US PATENT SUBCLASS 362 / 273
.~.~.~ Screw actuator

Current as of: June, 1999
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362 /   HD   ILLUMINATION

257  DF  LIGHT SOURCE (OR SUPPORT THEREFOR) AND MODIFIER {18}
269  DF  .~ Tiltable or rotatable as a unit {3}
271  DF  .~.~ With actuator {3}
273.~.~.~ Screw actuator

DEFINITION

Classification: 362/273

(under subclass 271) Subject matter wherein the light unit is structurally related to its support by a relatively rotatable helix-shaped member such that rotation of the member about the axis of the helix produces movement of the unit in the direction of the axis of the helix.