| Answer | Crossword Clue |
|---|---|
| RATCHETED | Moved by degrees in one direction only |
| ratchet | a mechanism which allows motion in one direction only / to move by a ratchet mechanism, also RACHET |
| rachet | a mechanism which allows motion in one direction only / to move by a rachet mechanism, also RATCHET |
| rectifier | An electrical device that converts an alternating current into a direct one by allowing a current to flow through it in one direction only |
| rectifiers | An electrical device that converts an alternating current into a direct one by allowing a current to flow through it in one direction only |
| heliostat | instrument consisting of a mirror moved by clockwork, for reflecting the sun's rays in a fixed direction |
