cmsterranova

By professormike
  • Apr 19, 1300

    The first mechanical clock

    The first mechanical clock
    The first mechanical clock was invented in the early 1300's. With this invention time began to be measured in hours (24 hours equaling a day).
  • Period: Apr 19, 1300 to

    clock

  • Apr 19, 1581

    Galileo, an Italian scientist, discovered the pendulum in 1581.

    Galileo, an Italian scientist, discovered the pendulum in 1581.
    Galileo, an Italian scientist, discovered the pendulum in 1581. The pendulum greatly improved the constant movement of the hands or bell of a clock. The average error with the pendulum varied only by seconds each day. Before this the error was from 10 to 15 minutes a day.

  • metallic gear

    metallic gear
    During the 1600's the metallic gear, or toothed wheel, and the use of the screw in assembling the clocks were first used.

  • newest clock

    newest clock
    digital clocks have radios and ipod jacks bult in and they also have different brightnesses