Q:

Who invented the ruler?

A:

Quick Answer

The invention of the ruler dates back to ancient civilizations, such as the Greeks and Egyptians. Used to make measurements in a straight line, the first excavated rulers were often made from wood or ivory.

Continue Reading
Who invented the ruler?
Credit: Image Source Image Source Getty Images

Full Answer

The first known rulers appeared to have markings that had similar meanings to our currently used imperial and metric systems. The modern 12-inch ruler used today was supposed to equal the length of a man's foot, while the width of a man's thumb was equal to 1 inch. The rulers we use today are often made from metal or plastic and can be bent to accommodate objects that are not completely straight.

Learn more about Inventions

Related Questions

  • Q:

    Who invented orthodontic braces?

    A:

    Although archaeologists have found what appear to have functioned as orthodontic devices in the tombs of the Ancient Egyptians, Greeks and Romans, prototypes of what would eventually evolve into modern-day orthodontic braces were first described in medical books in the 1700s. In 1819, Christophe-Francois Delabarre invented a wire crib that is considered the first modern orthodontic device.

    Full Answer >
    Filed Under:
  • Q:

    Who invented magnets?

    A:

    Although magnets were not invented, they were discovered by either the ancient Greeks or the Chinese. According to a legend, a Greek shepherd accidentally discovered lodestones in an area called Magnesia. Lodestone contains magnetite, which is a mineral found in nature as an iron ore.

    Full Answer >
    Filed Under:
  • Q:

    When was the crane machine invented?

    A:

    The crane was invented by the ancient Greeks around 900 BC. The original design was much more lightweight than modern crane machines and would have been powered by donkeys and other beasts of burden.

    Full Answer >
    Filed Under:
  • Q:

    How did the nut and bolt develop?

    A:

    Although the first concept of a threaded bolt, or screw, is believed to have been developed during the time of the Ancient Greeks by either Archytas of Tarentum or Archimedes, the first record of a threaded bolt used with an accompanying nut as a fastening device dates back to a 15th century book. The practice of using a screw as a fastening device gained acceptance about that time when it was used in Johann Gutenberg's invention of the printing press.

    Full Answer >
    Filed Under:

Explore