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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  Wristwatch Png Image
  Format: PNG
  Resolution: 1662x1673
  Size: 810.8KB
  Downloads: 568
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  Clock Png
  Format: PNG
  Resolution: 450x519
  Size: 193.6KB
  Downloads: 539
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  Stopwatch In Hand Png Image
  Format: PNG
  Resolution: 1991x1912
  Size: 1.2MB
  Downloads: 525
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  Stopwatch In Hand Png Image
  Format: PNG
  Resolution: 1636x3194
  Size: 2.0MB
  Downloads: 518
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  Wristwatch Png Image
  Format: PNG
  Resolution: 1205x1526
  Size: 325.4KB
  Downloads: 510
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  Wall Clock Png Image
  Format: PNG
  Resolution: 427x700
  Size: 155.6KB
  Downloads: 507
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  Clock Png Image
  Format: PNG
  Resolution: 1331x1511
  Size: 66.5KB
  Downloads: 489
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  Clock No Hands Clipart
  Format: PNG
  Resolution: 2700x2700
  Size: 302.2KB
  Downloads: 486
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  Clock Png Image
  Format: PNG
  Resolution: 2842x2688
  Size: 2.2MB
  Downloads: 481
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  Wristwatch Png Image
  Format: PNG
  Resolution: 643x1070
  Size: 279.2KB
  Downloads: 463
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  Wristwatch Png Image
  Format: PNG
  Resolution: 800x1154
  Size: 184.7KB
  Downloads: 461
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  Clock Png Image
  Format: PNG
  Resolution: 812x1591
  Size: 650.0KB
  Downloads: 458
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  Vintage Clock
  Format: PNG
  Resolution: 600x525
  Size: 143.3KB
  Downloads: 454
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  Wristwatch Png Image
  Format: PNG
  Resolution: 2008x3034
  Size: 2.3MB
  Downloads: 450
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  Alarm Clock Png Image
  Format: PNG
  Resolution: 1616x2223
  Size: 1.2MB
  Downloads: 450
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  Clock Png Image
  Format: PNG
  Resolution: 1204x1526
  Size: 443.8KB
  Downloads: 449
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  Clock Picture
  Format: PNG
  Resolution: 900x900
  Size: 386.9KB
  Downloads: 447
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  Red Wall Clock Png Image
  Format: PNG
  Resolution: 512x512
  Size: 58.6KB
  Downloads: 442
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  Clock No Hands File
  Format: PNG
  Resolution: 570x570
  Size: 48.6KB
  Downloads: 439
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  Clock Png Image
  Format: PNG
  Resolution: 900x906
  Size: 407.3KB
  Downloads: 437

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