Da Vinci Inventions

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Across
  1. 2. / allowed breathing hoses connected to a floating bell full of air, wearing face-masks with glass goggles that would help them see underwater.
  2. 3. / make it possible for drive shafts to rotate, for goods to roll along ramps in a factory or store, and for mechanical devices in general to operate.
  3. 6. cart / it used a spring-driven mechanism similar to that in a clock.
  4. 7. / seems to be designed to fire large stones or possibly flaming bombs.
Down
  1. 1. / two wings of the device feature pointed ends commonly associated with the winged creature.
  2. 4. / has a number of light cannons arranged on a circular platform with wheels that allow for 360-degree range.
  3. 5. / an instrument for measuring the speed of wind.