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.

  • Alarm Clock Clipart PNG Image
    Alarm Clock Clipart
    Format: PNG
    Resolution: 1024x1201
    Size: 798.5KB
    Downloads: 299
  • Vintage Clock Transparent Background PNG Image
    Vintage Clock Transparent Background
    Format: PNG
    Resolution: 768x768
    Size: 850.1KB
    Downloads: 263
  • Alarm Clock File PNG Image
    Alarm Clock File
    Format: PNG
    Resolution: 1118x1500
    Size: 861.0KB
    Downloads: 392
  • Alarm Clock Image PNG Image
    Alarm Clock Image
    Format: PNG
    Resolution: 1616x2223
    Size: 2.3MB
    Downloads: 319
  • Vintage Clock Transparent Image PNG Image
    Vintage Clock Transparent Image
    Format: PNG
    Resolution: 1600x1599
    Size: 3.1MB
    Downloads: 354
  • Point House Astrology Angle Horoscope Download Free Image PNG Image
    Point House Astrology Angle Horoscope Download Free Image
    Format: PNG
    Resolution: 589x595
    Size: 64.9KB
    Downloads: 188
  • Wall Alarm Black Clock Download HQ PNG Image
    Wall Alarm Black Clock Download HQ
    Format: PNG
    Resolution: 1920x1080
    Size: 467.2KB
    Downloads: 89
  • Small Wall Black Clock Download HD PNG Image
    Small Wall Black Clock Download HD
    Format: PNG
    Resolution: 1280x1024
    Size: 377.9KB
    Downloads: 98
  • 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
  • Wall Black Clock PNG Image High Quality PNG Image
    Wall Black Clock PNG Image High Quality
    Format: PNG
    Resolution: 1280x1280
    Size: 406.2KB
    Downloads: 91
  • Wall Vector Black Clock Free HD Image PNG Image
    Wall Vector Black Clock Free HD Image
    Format: PNG
    Resolution: 750x750
    Size: 87.8KB
    Downloads: 68
  • 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 Black George Jensen Clock PNG Image
    Wall Black George Jensen Clock
    Format: PNG
    Resolution: 1024x1024
    Size: 622.0KB
    Downloads: 79
  • Wall Golden Black Clock Free Transparent Image HQ PNG Image
    Wall Golden Black Clock Free Transparent Image HQ
    Format: PNG
    Resolution: 500x500
    Size: 133.8KB
    Downloads: 72
  • Wall Drawn Hand Black Clock PNG Image
    Wall Drawn Hand Black Clock
    Format: PNG
    Resolution: 512x512
    Size: 16.8KB
    Downloads: 57
  • Wall Black Numbers Clock Download HD PNG Image
    Wall Black Numbers Clock Download HD
    Format: PNG
    Resolution: 1024x838
    Size: 241.6KB
    Downloads: 70
  • Wall Black Clock Free Download Image PNG Image
    Wall Black Clock Free Download Image
    Format: PNG
    Resolution: 1375x1366
    Size: 1.4MB
    Downloads: 46
  • Wall Black Round Clock Free HQ Image PNG Image
    Wall Black Round Clock Free HQ Image
    Format: PNG
    Resolution: 1360x1342
    Size: 645.5KB
    Downloads: 98
  • 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 Circle Green Clock Free Transparent Image HD PNG Image
    Wall Circle Green Clock Free Transparent Image HD
    Format: PNG
    Resolution: 908x1920
    Size: 117.9KB
    Downloads: 81

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