US PATENT SUBCLASS 242 / 356
.~.~ Alternately or differently driven coils

Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

324  DF  UNWINDING AND REWINDING A MACHINE CONVERTIBLE INFORMATION CARRIER (E.G., MAGNETIC TAPE OR PHOTOGRAPHIC FILM) {13}
349  DF  .~ With particular drive {7}
356.~.~ Alternately or differently driven coils {4}
356.1  DF  .~.~.~> Coaxial coils
356.2  DF  .~.~.~> Step-driven coil
356.3  DF  .~.~.~> Multiple carrier speeds {1}
356.5  DF  .~.~.~> By friction drive {2}

DEFINITION

Classification: 242/356

Alternately or differently driven coils:

(under subclass 349) Subject matter wherein the drive mechanism acts on the supply and take-up coils at different times or in a different manner.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting,

385+, and 446+ for a spool drive in a winding device for a sign or similar exhibit.

192, Clutches and Power-Stop Control, appropriate subclasses for clutches, clutch-brakes, and power-stop controls as a subcombination or in general use.

396, Photography, appropriate subclasses and particularly

387+, for a camera structure with winding, feeding, or tensioning film and subclasses 612+ for photos:graphic medium feed in a fluid treating apparatus.