A Clock is a device used to keep, measure and indicate time. Clocks are said to be one of the oldest inventions of the human being, meeting a dire need to measure intervals of time shorter than the natural units like the day or the lunar month or the period of the entire year. Devices working on various physical processes have been used over a very long time. Some of the predecessors of the modern clock were often based on the movement of nature and were also termed as clocks. The one which shows time by representing the shadow of the sun on a flat surface is called a sundial. In order to measure the duration time, instruments like hourglass have been used. There are also water clocks which are considered to be one of the oldest time measuring devices. The major advancement came into the manufacturing system of clocks after the invention of verge escapement, which made possible the production of the first mechanical clock in 1300s in Europe. It used to keep time with oscillating timekeepers like balance wheels.
In horology, traditionally the clocks which did not strike hourly with some sound were known to be a timepiece and the one which produce the strike sound was called a clock.

In this sub category you can download free PNG images: Clock Objects. In this category "Clock" we have 159 free PNG images with transparent background.

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  Clock Png Image
  Format: PNG
  Resolution: 1563x1540
  Size: 878.5KB
  Downloads: 437
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 1457x2120
  Size: 1.3MB
  Downloads: 437
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  Clock Free Download Png
  Format: PNG
  Resolution: 1600x1597
  Size: 1.2MB
  Downloads: 435
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  Clock Png Pic
  Format: PNG
  Resolution: 1770x1770
  Size: 3.4MB
  Downloads: 434
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  Clock Png Image
  Format: PNG
  Resolution: 1915x1914
  Size: 528.7KB
  Downloads: 433
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  Clock Png Image
  Format: PNG
  Resolution: 1200x800
  Size: 274.5KB
  Downloads: 433
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  Clock Transparent
  Format: PNG
  Resolution: 451x451
  Size: 16.0KB
  Downloads: 432
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 2400x2229
  Size: 341.8KB
  Downloads: 429
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  Clock Png Image
  Format: PNG
  Resolution: 987x2002
  Size: 601.7KB
  Downloads: 426
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  Clock Download Png
  Format: PNG
  Resolution: 1024x1201
  Size: 798.5KB
  Downloads: 424
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  Clock Png Image
  Format: PNG
  Resolution: 256x256
  Size: 10.8KB
  Downloads: 422
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 1514x2179
  Size: 1.2MB
  Downloads: 420
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  Clock Png Image
  Format: PNG
  Resolution: 1050x1500
  Size: 274.8KB
  Downloads: 417
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  Clock Png Image
  Format: PNG
  Resolution: 1940x2486
  Size: 2.2MB
  Downloads: 417
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 600x787
  Size: 175.8KB
  Downloads: 415
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  Clock Hands
  Format: PNG
  Resolution: 550x550
  Size: 74.5KB
  Downloads: 413
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  Clock Png Image
  Format: PNG
  Resolution: 274x271
  Size: 17.8KB
  Downloads: 411
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  Clock Free Png Image
  Format: PNG
  Resolution: 999x999
  Size: 341.1KB
  Downloads: 408
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  Clock Png Image
  Format: PNG
  Resolution: 1024x1024
  Size: 178.8KB
  Downloads: 407
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  Clock Png Image
  Format: PNG
  Resolution: 598x598
  Size: 164.7KB
  Downloads: 405

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