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.

  • Wall Green Office Clock PNG Free Photo PNG Image
    Wall Green Office Clock PNG Free Photo
    Format: PNG
    Resolution: 700x700
    Size: 429.1KB
    Downloads: 68
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1456x1460
    Size: 454.6KB
    Downloads: 367
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1563x1540
    Size: 878.5KB
    Downloads: 437
  • 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
  • Vintage Clock Transparent PNG Image
    Vintage Clock Transparent
    Format: PNG
    Resolution: 500x532
    Size: 408.8KB
    Downloads: 363
  • Alarmclock Png Image PNG Image
    Alarmclock Png Image
    Format: PNG
    Resolution: 512x512
    Size: 50.6KB
    Downloads: 309
  • Stopwatch In Hand Png Image PNG Image
    Stopwatch In Hand Png Image
    Format: PNG
    Resolution: 1991x1912
    Size: 1.2MB
    Downloads: 525
  • Vintage Clock Image PNG Image
    Vintage Clock Image
    Format: PNG
    Resolution: 1524x1270
    Size: 309.9KB
    Downloads: 401
  • Clock Png Clipart PNG Image
    Clock Png Clipart
    Format: PNG
    Resolution: 434x434
    Size: 7.3KB
    Downloads: 836
  • Wall Circle Green Clock Free Download Image PNG Image
    Wall Circle Green Clock Free Download Image
    Format: PNG
    Resolution: 851x852
    Size: 40.4KB
    Downloads: 63
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1000x1000
    Size: 456.2KB
    Downloads: 338
  • Wall Clock Png Image PNG Image
    Wall Clock Png Image
    Format: PNG
    Resolution: 427x700
    Size: 155.6KB
    Downloads: 507
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 987x2002
    Size: 601.7KB
    Downloads: 426
  • 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
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1050x1500
    Size: 274.8KB
    Downloads: 417
  • Clock Hands PNG Image
    Clock Hands
    Format: PNG
    Resolution: 550x550
    Size: 74.5KB
    Downloads: 413
  • 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
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 580x600
    Size: 91.3KB
    Downloads: 305
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1021x1024
    Size: 498.1KB
    Downloads: 317
  • Small Wall Black Clock Download HD PNG Image
    Small Wall Black Clock Download HD
    Format: PNG
    Resolution: 1280x1024
    Size: 377.9KB
    Downloads: 98

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