242 / | HD | WINDING, TENSIONING, OR GUIDING |
324 | DF | UNWINDING AND REWINDING A MACHINE CONVERTIBLE INFORMATION CARRIER (E.G., MAGNETIC TAPE OR PHOTOGRAPHIC FILM) {13} |
333 | DF | .~ Automated stop or reverse {5} |
333.3 | DF | .~.~ Carrier engaging tension sensor {1} |
333.4 | .~.~.~ Electrical control |