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No one knows exactly when the first mechanical clock was made or by whom. Researchers say that they were probably first made late in the 13th century. This would seem to be confirmed with evidence that around 1283 church records in England were found to mention a clock in Dunstable Priory, Bedford. Most early mechanical clocks known at this time were tower clocks. Most of these early tower clocks had no dials or hands. They alerted the public of the hour by ringing bells. This may be the reason the word 'clock' which is derived from the word 'bell' gained wide use. Built out of iron, most tower clocks were made and serviced by blacksmiths. These first clocks were very inaccurate. They had to be frequently adjusted to the correct hour by comparing them with the sundial! The development of the mechanical clock was slowed down by the lack of a reliable escapement. Gear works had been known for centuries, and the power at the time to drive the gears was weight. So the only thing lacking to make a clock more accurate was a reliable system to regulate the speed of the gears. Several different early escapements were used on tower clocks such as the 'verge and folliot'. Soon after, dials and hour hands began showing up on some clocks. Finally the minute hand was brought into common use. During the latter part of the fourteenth century, in Europe, the 'chamber' clock finally brought clocks down to a size that could be brought into the home. Then, in the fifteenth century, table, or mantel clocks using springs instead of weights for power started to appear. Some clocks also started using a balance wheel escapement. Other improvements followed, such as the pendulum by Christian Huygens in 1657, which along with an anchor, or deadbeat escapement, greatly improved the clocks accuracy.
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metal craft clock
ID: HP-015372
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Metal-Craft-Clock