| Answer | Crossword Clue |
|---|---|
| helicographs | HELICOGRAPH, an instrument for drawing spirals on a plane |
| helicograph | an instrument for drawing spirals on a plane |
| pantograph | An instrument for copying a drawing or plan on a different scale by a system of hinged and jointed rods |
| pantographs | An instrument for copying a drawing or plan on a different scale by a system of hinged and jointed rods |
