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 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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  Clock No Hands File
  Format: PNG
  Resolution: 570x570
  Size: 48.6KB
  Downloads: 439
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  Digital Clock Transparent Image
  Format: PNG
  Resolution: 600x289
  Size: 49.4KB
  Downloads: 304
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  Clock Hands File
  Format: PNG
  Resolution: 1000x1000
  Size: 58.1KB
  Downloads: 305
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  Clock Hands Transparent Image
  Format: PNG
  Resolution: 600x600
  Size: 67.7KB
  Downloads: 372
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  Vintage Clock Clipart
  Format: PNG
  Resolution: 1372x1372
  Size: 71.8KB
  Downloads: 326
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  Clock Hands
  Format: PNG
  Resolution: 550x550
  Size: 74.5KB
  Downloads: 413
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  Clock Hands Image
  Format: PNG
  Resolution: 1000x1000
  Size: 74.6KB
  Downloads: 336
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  Digital Clock Clipart
  Format: PNG
  Resolution: 564x423
  Size: 131.2KB
  Downloads: 303
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  Digital Clock Image
  Format: PNG
  Resolution: 665x423
  Size: 135.4KB
  Downloads: 297
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  Vintage Clock
  Format: PNG
  Resolution: 600x525
  Size: 143.3KB
  Downloads: 454
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  Digital Clock File
  Format: PNG
  Resolution: 2400x905
  Size: 146.8KB
  Downloads: 342
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  Alarm Clock
  Format: PNG
  Resolution: 555x785
  Size: 152.5KB
  Downloads: 337
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  Clock Hands Transparent
  Format: PNG
  Resolution: 2244x2244
  Size: 248.9KB
  Downloads: 388
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  Vintage Clock File
  Format: PNG
  Resolution: 400x398
  Size: 284.1KB
  Downloads: 403
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  Clock No Hands Clipart
  Format: PNG
  Resolution: 2700x2700
  Size: 302.2KB
  Downloads: 486
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  Vintage Clock Image
  Format: PNG
  Resolution: 1524x1270
  Size: 309.9KB
  Downloads: 401
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  Vintage Clock Transparent
  Format: PNG
  Resolution: 500x532
  Size: 408.8KB
  Downloads: 363
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  Vintage Clock
  Format: PNG
  Resolution: 600x600
  Size: 502.7KB
  Downloads: 308

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