Extinct Invention

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Across
  1. 5. the earliest known device for recording sound back in 1857
  2. 7. a device used to measure the passage of time using sand
  3. 8. a mechanical machine for typing characters
  4. 9. an instrument showing the time by the shadow of a pointer cast by the sun
Down
  1. 1. electric monowheel vehicle invented back in 1930 with the speed of 30 miles per hour
  2. 2. instrument for reproducing sounds by means of the vibration of a needle, following a groove on rotating disc
  3. 3. a casette used in 19th century in the format of magnetic tapes
  4. 4. used as a washing tool in the 19th century
  5. 6. the first mechanism invented to facilitate the firing of a hand-held firearm