400 / | HD | TYPEWRITING MACHINES |
251 | DF | CASE-SHIFT MECHANISM {14} |
268 | DF | .~ For shifting type-face or type-bar {2} |
270 | DF | .~.~ Mounted on type-bar support (e.g., guide pin, type-bar-segment, etc.) {3} |
270.3 | .~.~.~ Including pivoted-lever support (e.g., cantilever spring, etc.) |