Uncommon Inventions

12345678910
Across
  1. 3. – Ancient instrument for measuring astronomical positions
  2. 5. – Early electronic component used in radios
  3. 7. – Rigid airship used in early aviation
  4. 9. – Early chess-playing automaton
  5. 10. – Boat designed to skim across water
Down
  1. 1. – Camera stabilized by a gimbal mechanism
  2. 2. – Device allowing underwater breathing
  3. 4. – Mask used during plague outbreaks
  4. 6. – System for transporting items through tubes
  5. 8. – Modular design concept used in construction