| 91 / | HD | MOTORS: EXPANSIBLE CHAMBER TYPE |
| 218 | DF | CYCLICALLY OPERABLE {34} |
| 247 | DF | .~ Timing control by relative adjustment of plural movable fluid control elements {3} |
| 252 | DF | .~.~ Cut off adjustable relative to admission {4} |
| 253 | DF | .~.~.~ Inlet controlled by relatively cyclically moved elements {3} |
| 256 | DF | .~.~.~.~ Cut off adjustable relative to reciprocating admission element {3} |
| 257 | | .~.~.~.~.~ Oscillating admission element |