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Watch Movement, SEM
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Watch Movement, SEM
Part of a mechanical watch movement, coloured scanning electron micrograph (SEM). The image shows some of the jewels used as bearings in a wristwatch. Natural gem bearings, mostly garnets, rubies and sapphires, were invented in the early 18th Century. At the turn of the 20th Century a method for producing synthetic sapphires was invented and now most jewel bearings are synthetic sapphires made from crystalline aluminium oxide known as corundum. This is an extremely hard substance that can be highly polished thereby reducing friction. Red sapphires known as rubies are produced by introducing impurities, all other colours are known as sapphires but there is no difference in their properties as bearings. The image also shows the balance wheel with the steel balance spring (centre image). These regulate the watch to help keep accurate time. Magnification x13 at an image size of 10 cm wide
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Media ID 9195591
© POWER AND SYRED/SCIENCE PHOTO LIBRARY
Aluminium Oxide Cogs Corundum Gems Mechanical Regulate Garnets Rubies Sapphires Timepiece Wristwatch
EDITORS COMMENTS
This print showcases the intricate beauty of a watch movement, captured through a colored scanning electron micrograph (SEM). The image unveils an array of jewels used as bearings in a wristwatch, revealing the evolution of these precious components over time. Initially, natural gem bearings made from garnets, rubies, and sapphires were introduced in the 18th Century. However, with advancements in technology at the turn of the 20th Century, synthetic sapphires became prevalent. These synthetic jewels are crafted from corundum – crystalline aluminum oxide – renowned for its exceptional hardness and ability to be polished to perfection, minimizing friction. The photograph also highlights the balance wheel adorned with a steel balance spring at its center. Together, they regulate the watch's movements and play a crucial role in maintaining accurate timekeeping. With a magnification of x13 and an image size measuring 10 cm wide, this SEM snapshot provides an extraordinary glimpse into the inner workings of mechanical watches. As we delve into this mesmerizing world where cogs meet gems and precision intertwines with craftsmanship, we gain appreciation for both technological progress and timeless elegance. This remarkable photograph is courtesy of Science Photo Library—a testament to their dedication to capturing scientific marvels that inspire awe within us all.
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