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: 845x841
  Size: 233.6KB
  Downloads: 376
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  Wristwatch Smartphone Samsung Png Image
  Format: PNG
  Resolution: 1280x1280
  Size: 318.5KB
  Downloads: 634
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  Wristwatch Png Image
  Format: PNG
  Resolution: 1000x1000
  Size: 168.0KB
  Downloads: 669
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 1592x2181
  Size: 1.3MB
  Downloads: 327
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  Wall Clock Png Image
  Format: PNG
  Resolution: 600x598
  Size: 21.9KB
  Downloads: 399
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  Clock Png Image
  Format: PNG
  Resolution: 1299x1311
  Size: 695.1KB
  Downloads: 341
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  Clock Png Image
  Format: PNG
  Resolution: 3503x3504
  Size: 764.2KB
  Downloads: 292
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  Clock Png Image
  Format: PNG
  Resolution: 1494x1495
  Size: 695.1KB
  Downloads: 335
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  Clock Png Pic
  Format: PNG
  Resolution: 1770x1770
  Size: 3.4MB
  Downloads: 434
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  Clock High-Quality Png
  Format: PNG
  Resolution: 499x499
  Size: 126.5KB
  Downloads: 332
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  Digital Clock Transparent
  Format: PNG
  Resolution: 793x220
  Size: 11.7KB
  Downloads: 290
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  Clock Hands Clipart
  Format: PNG
  Resolution: 400x400
  Size: 43.6KB
  Downloads: 321
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  Clock No Hands Image
  Format: PNG
  Resolution: 449x524
  Size: 48.0KB
  Downloads: 347
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  Digital Clock Transparent Image
  Format: PNG
  Resolution: 600x289
  Size: 49.4KB
  Downloads: 304
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  Vintage Clock File
  Format: PNG
  Resolution: 400x398
  Size: 284.1KB
  Downloads: 403
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  Vintage Clock
  Format: PNG
  Resolution: 600x600
  Size: 502.7KB
  Downloads: 308
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  Vintage Clock Transparent Background
  Format: PNG
  Resolution: 768x768
  Size: 850.1KB
  Downloads: 263
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  Alarm Clock File
  Format: PNG
  Resolution: 1118x1500
  Size: 861.0KB
  Downloads: 392
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  Alarm Clock Image
  Format: PNG
  Resolution: 1616x2223
  Size: 2.3MB
  Downloads: 319

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