Manufacturing process ofwatches By Karen Salazar
Early forms of time-telling The Sun Sun-Dial
Wrist watches • Small pocket watches, two to three inches in diameter, were available by the end of the nineteenth century. • Mechanical wristwatches were an everyday item in the United States by the 1960s.
INVENTION OF THE “MICROCHIP” • Microchip technology with quartz crystals • Microchip is used to send signals to the dial of the watch • Advantage: not a mechanical device w/ moving parts = does not wear out
QUARTZ • A quartz watch uses the electricity from a piece of quartz from a battery
RAW MATERIALS • Made of modern materials; plastics and alloy metals • Cases can be made of either plastic or metal • Microchips: made of silicon • LED: made of gallium arsenide
CITATIONS http://bmwi.bimmerpost.com/forums/showthread.php?t=891519 http://www.madehow.com/Volume-1/Watch.html