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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  Stopwatch Png Image
  Format: PNG
  Resolution: 1496x1869
  Size: 443.8KB
  Downloads: 1,093
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  Clock Png Image
  Format: PNG
  Resolution: 2921x2501
  Size: 3.6MB
  Downloads: 657
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  Wall Clock Png Image
  Format: PNG
  Resolution: 2333x2333
  Size: 875.6KB
  Downloads: 636
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  Wall Clock Png Image
  Format: PNG
  Resolution: 2814x2811
  Size: 4.2MB
  Downloads: 860
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  Stopwatch In Hand Png Image
  Format: PNG
  Resolution: 1991x1912
  Size: 1.2MB
  Downloads: 525
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  Wristwatch Png Image
  Format: PNG
  Resolution: 800x1000
  Size: 230.5KB
  Downloads: 839
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  Wall Clock Png Image
  Format: PNG
  Resolution: 1775x1780
  Size: 1.1MB
  Downloads: 1,257
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  Clock Png Image
  Format: PNG
  Resolution: 1747x1737
  Size: 1.8MB
  Downloads: 721
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  Clock Png Image
  Format: PNG
  Resolution: 1204x1526
  Size: 443.8KB
  Downloads: 449
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  Stopwatch Png Image
  Format: PNG
  Resolution: 2704x3509
  Size: 1.2MB
  Downloads: 670
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  Clock Png Image
  Format: PNG
  Resolution: 2143x2393
  Size: 2.0MB
  Downloads: 595
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  Clock Png Image
  Format: PNG
  Resolution: 256x603
  Size: 69.7KB
  Downloads: 727
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  Red Wall Clock Png Image
  Format: PNG
  Resolution: 512x512
  Size: 58.6KB
  Downloads: 442
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  Clock Png Image
  Format: PNG
  Resolution: 654x651
  Size: 192.0KB
  Downloads: 651
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  Wristwatch Png Image
  Format: PNG
  Resolution: 1200x1200
  Size: 292.9KB
  Downloads: 849
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  Clock Png Image
  Format: PNG
  Resolution: 2221x2244
  Size: 1.1MB
  Downloads: 720
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  Wristwatch Png Image
  Format: PNG
  Resolution: 1000x1000
  Size: 282.7KB
  Downloads: 673
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  Clock Png Image
  Format: PNG
  Resolution: 1019x1980
  Size: 260.2KB
  Downloads: 396
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  Wall Clock Png Image
  Format: PNG
  Resolution: 427x700
  Size: 155.6KB
  Downloads: 507
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  Wristwatch Png Image
  Format: PNG
  Resolution: 2059x2887
  Size: 2.6MB
  Downloads: 784

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