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 Black Numbers Clock Download HD PNG Image
    Wall Black Numbers Clock Download HD
    Format: PNG
    Resolution: 1024x838
    Size: 241.6KB
    Downloads: 70
  • 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
  • Alarm Clock Clipart PNG Image
    Alarm Clock Clipart
    Format: PNG
    Resolution: 1024x1201
    Size: 798.5KB
    Downloads: 299
  • Stopwatch Png Image PNG Image
    Stopwatch Png Image
    Format: PNG
    Resolution: 1496x1869
    Size: 443.8KB
    Downloads: 1,093
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 2143x2393
    Size: 2.0MB
    Downloads: 595
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1163x1156
    Size: 321.2KB
    Downloads: 349
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1896x1836
    Size: 1.4MB
    Downloads: 360
  • Alarm Clock Png Image PNG Image
    Alarm Clock Png Image
    Format: PNG
    Resolution: 2400x2229
    Size: 341.8KB
    Downloads: 429
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 3503x2413
    Size: 2.9MB
    Downloads: 388
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 889x889
    Size: 229.0KB
    Downloads: 387
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 1762x1782
    Size: 1.6MB
    Downloads: 328
  • Clock Png Image PNG Image
    Clock Png Image
    Format: PNG
    Resolution: 598x598
    Size: 164.7KB
    Downloads: 405
  • Clock Transparent PNG Image
    Clock Transparent
    Format: PNG
    Resolution: 451x451
    Size: 16.0KB
    Downloads: 432
  • Clock Png PNG Image
    Clock Png
    Format: PNG
    Resolution: 450x519
    Size: 193.6KB
    Downloads: 539
  • Clock Png Images PNG Image
    Clock Png Images
    Format: PNG
    Resolution: 400x400
    Size: 48.8KB
    Downloads: 336
  • Clock Hands File PNG Image
    Clock Hands File
    Format: PNG
    Resolution: 1000x1000
    Size: 58.1KB
    Downloads: 305
  • Clock Hands Image PNG Image
    Clock Hands Image
    Format: PNG
    Resolution: 1000x1000
    Size: 74.6KB
    Downloads: 336
  • Digital Clock Clipart PNG Image
    Digital Clock Clipart
    Format: PNG
    Resolution: 564x423
    Size: 131.2KB
    Downloads: 303
  • Vintage Clock PNG Image
    Vintage Clock
    Format: PNG
    Resolution: 600x525
    Size: 143.3KB
    Downloads: 454
  • Digital Clock File PNG Image
    Digital Clock File
    Format: PNG
    Resolution: 2400x905
    Size: 146.8KB
    Downloads: 342

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