400 / | HD | TYPEWRITING MACHINES |
251 | DF | CASE-SHIFT MECHANISM {14} |
274 | DF | .~ For locking case-shift mechanism in position (e.g., rebound lock, cam, etc.) {2} |
276 | DF | .~.~ For locking shift-key lever in depressed position {2} |
276.2 | .~.~.~ By means pivoted on shift-key lever |