| 74 / | HD | MACHINE ELEMENT OR MECHANISM |
| * | DD | MECHANICAL MOVEMENTS {15} |
| 25 | DF | .~ Rotary to or from reciprocating or oscillating {20} |
| 29 | ![]() | .~.~ Rack and pinion type {5} |
| 30 | DF | .~.~.~> Shifting rack |
| 31 | DF | .~.~.~> Shiftable pinion |
| 32 | DF | .~.~.~> Segmental pinion |
| 33 | DF | .~.~.~> Alternately rotated pinion |
| 34 | DF | .~.~.~> Clutchable gears {1} |