clocks

By IDKnow
  • Sep 25, 1001

    clepsydra(water clock)

    clepsydra(water clock)
    told time by drippnh of water through a small opening, a float carrying a pointer marked the hours.(Aincent Times)
  • Sep 25, 1101

    sun clock

    sun clock
    sun clock had a dial on t that casted a shadow fron the sun and the sahsow marked a scale
  • Sep 25, 1500

    mechanical clocks

    mechanical clocks
    mechanical clock that worked using gears and weghts, weights where pulled by gravity (Medieval Europe)
  • Sep 25, 1550

    mechanical clock

    mechanical clock
    mechanical clocks that chimed on every quarter hour
  • Sep 25, 1556

    cycloid

    cycloid
    pendulum was attatched to the mechanical clock and forced it to move more regularly
  • Sep 25, 1582

    pendulum

    pendulum
    invented by galileo and the pendulum marked small intervals of time

  • grandfather clock

    grandfather clock
    used a pendulum inside of a wooden box so it wouldnt be affected by the wind that moved back and forth every second.

  • battery powered analog clock

    battery powered analog clock
    analog clock powered on batteries

  • digital clock

    digital clock
    josef pallweber the hours and minutes were visible on rotating discs