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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  Vintage Clock File
  Format: PNG
  Resolution: 400x398
  Size: 284.1KB
  Downloads: 403
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  Clock Png Image
  Format: PNG
  Resolution: 1399x1398
  Size: 976.3KB
  Downloads: 403
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  Vintage Clock Image
  Format: PNG
  Resolution: 1524x1270
  Size: 309.9KB
  Downloads: 401
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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: 250x250
  Size: 32.4KB
  Downloads: 398
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  Clock Png Image
  Format: PNG
  Resolution: 1019x1980
  Size: 260.2KB
  Downloads: 396
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  Alarm Clock File
  Format: PNG
  Resolution: 1118x1500
  Size: 861.0KB
  Downloads: 392
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  Clock Png Image
  Format: PNG
  Resolution: 1772x1779
  Size: 1.1MB
  Downloads: 390
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  Clock Png Image
  Format: PNG
  Resolution: 3503x2413
  Size: 2.9MB
  Downloads: 388
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  Clock Hands Transparent
  Format: PNG
  Resolution: 2244x2244
  Size: 248.9KB
  Downloads: 388
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  Clock Png Image
  Format: PNG
  Resolution: 889x889
  Size: 229.0KB
  Downloads: 387
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  Clock Png Image
  Format: PNG
  Resolution: 1119x2628
  Size: 729.9KB
  Downloads: 387
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  Clock Png Image
  Format: PNG
  Resolution: 1832x1641
  Size: 1.5MB
  Downloads: 383
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 658x870
  Size: 162.0KB
  Downloads: 376
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  Clock Png Image
  Format: PNG
  Resolution: 396x772
  Size: 139.8KB
  Downloads: 376
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  Clock Png Image
  Format: PNG
  Resolution: 845x841
  Size: 233.6KB
  Downloads: 376
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  Wristwatch Png Image
  Format: PNG
  Resolution: 777x1428
  Size: 368.5KB
  Downloads: 373
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  Clock Png Image
  Format: PNG
  Resolution: 861x1300
  Size: 365.5KB
  Downloads: 373
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  Clock Hands Transparent Image
  Format: PNG
  Resolution: 600x600
  Size: 67.7KB
  Downloads: 372
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  Clock Png Image
  Format: PNG
  Resolution: 1478x1479
  Size: 599.4KB
  Downloads: 368

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