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.

  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1830x2554
    Size: 2.0MB
    Downloads: 361
  • Wristwatch Png Image PNG Image
    Wristwatch Png Image
    Format: PNG
    Resolution: 2188x3520
    Size: 3.1MB
    Downloads: 365
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 250x250
    Size: 32.4KB
    Downloads: 398
  • Wall Green Clock Free Download PNG HD PNG Image
    Wall Green Clock Free Download PNG HD
    Format: PNG
    Resolution: 2002x989
    Size: 308.1KB
    Downloads: 88
  • Wall Green Clock Free Clipart HQ PNG Image
    Wall Green Clock Free Clipart HQ
    Format: PNG
    Resolution: 1100x1100
    Size: 1.2MB
    Downloads: 84
  • Alarm Clock Png Image PNG Image
    Alarm Clock Png Image
    Format: PNG
    Resolution: 658x870
    Size: 162.0KB
    Downloads: 376
  • Digital Clock Image PNG Image
    Digital Clock Image
    Format: PNG
    Resolution: 665x423
    Size: 135.4KB
    Downloads: 297
  • Wall Clock Png Image PNG Image
    Wall Clock Png Image
    Format: PNG
    Resolution: 900x900
    Size: 365.5KB
    Downloads: 366
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1772x1779
    Size: 1.1MB
    Downloads: 390
  • Wall Vector Black Clock PNG Image High Quality PNG Image
    Wall Vector Black Clock PNG Image High Quality
    Format: PNG
    Resolution: 600x598
    Size: 47.7KB
    Downloads: 85
  • Wall Big Black Clock HQ Image Free PNG Image
    Wall Big Black Clock HQ Image Free
    Format: PNG
    Resolution: 512x512
    Size: 84.6KB
    Downloads: 94
  • Clock Hands Transparent Image PNG Image
    Clock Hands Transparent Image
    Format: PNG
    Resolution: 600x600
    Size: 67.7KB
    Downloads: 372
  • Wristwatch Png Image PNG Image
    Wristwatch Png Image
    Format: PNG
    Resolution: 777x1428
    Size: 368.5KB
    Downloads: 373
  • Wall Black Round Clock PNG File HD PNG Image
    Wall Black Round Clock PNG File HD
    Format: PNG
    Resolution: 1456x1460
    Size: 706.8KB
    Downloads: 71
  • Wall Photos Circle Green Clock PNG Image
    Wall Photos Circle Green Clock
    Format: PNG
    Resolution: 718x718
    Size: 55.2KB
    Downloads: 81
  • Clock Png Picture PNG Image
    Clock Png Picture
    Format: PNG
    Resolution: 256x256
    Size: 54.5KB
    Downloads: 356
  • Clock Free Png Image PNG Image
    Clock Free Png Image
    Format: PNG
    Resolution: 999x999
    Size: 341.1KB
    Downloads: 408
  • Wall Clock Green Classic Free Transparent Image HQ PNG Image
    Wall Clock Green Classic Free Transparent Image HQ
    Format: PNG
    Resolution: 852x851
    Size: 30.7KB
    Downloads: 98
  • Clock Hands Transparent PNG Image
    Clock Hands Transparent
    Format: PNG
    Resolution: 2244x2244
    Size: 248.9KB
    Downloads: 388
  • Digital Clock Transparent Background PNG Image
    Digital Clock Transparent Background
    Format: PNG
    Resolution: 437x143
    Size: 26.6KB
    Downloads: 304

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