Ruler markings portable#
Ruler markings software#

It could only be asserted as one meter as part of a language game. He pointed out that the standard meter bar in Paris was the criterion against which all other rulers were determined to be one meter long, but that there was no analytical way to demonstrate that the standard meter bar itself was one meter long. Ludwig Wittgenstein famously used rulers as an example in his discussion of language games in the Philosophical Investigations. Historically, a flexible lead rule used by masons that could be bent to the curves of a molding was known as a lesbian rule. A flexible device that can be bent to the desired shape is known as a flat spline, or (in its more modern incarnation) a flexible curve. The equivalent of a ruler for drawing or reproducing a smooth curve, where it takes the form of a rigid template, is known as a French curve. Frank Hunt later made the flexible ruler in 1902. ДЄnton Ullrich invented the folding ruler in 1851. Ancient bricks found throughout the region have dimensions that correspond to these units. Ian Whitelaw holds that the Mohenjo-Daro ruler is divided into units corresponding to 1.32 inches (33.5В mm) and these are marked out in decimal subdivisions with amazing accuracy, to within 0.005 inches (0.13В mm). Excavations at Lothal (2400В BCE) have yielded one such ruler calibrated to about 1вЃ„ 16 inch (1.6В mm). Rulers made of ivory were in use by the Indus Valley Civilization period prior to 1500В BCE.

2650В BCE and was found by the German Assyriologist Eckhard Unger while excavating at the Sumerian city of Nippur (present day Iraq). The oldest preserved measuring rod is a copper-alloy bar that dates from c. In the late 18th century the metric system came into use and has been adopted to varying degrees in almost all countries in the world. In the history of measurement many distance units have been used which were based on human body parts such as the cubit, hand and foot and these units varied in length by era and location. These programs are also known as screen rulers.ДЄ wooden carpenter's rule and other tools found on board the 16th-century carrack Mary Rose

Ruler markings software#

It is rolled up when not in use, taking up little space.ДЄ ruler software program can be used to measure pixels on a computer screen or mobile phone. It is used to measure around a solid body, e.g., for a person's waist measurement, as well as for linear measurement, e.g., for the inside leg length. The illustrations on this page show a 2В m (6В ft 7В in) carpenter's rule, which folds down to a length of 25В cm (10В in) to easily fit in a pocket, and a 5В m (16В ft) tape, which retracts into a small housing.ДЄ flexible length-measuring instrument which is not necessarily straight in use is the tailor's fabric tape measure, a length of tape calibrated in inches and centimeters. When extended for use, they are straight, like a ruler.

Ruler markings portable#

Measuring instruments similar in function to rulers are made portable by folding (carpenter's folding rule) or retracting into a coil (metal tape measure) when not in use. More detailed line gauges may contain sample widths of lines, samples of common type in several point sizes, etc. Units of measurement on a basic line gauge usually include inches, agate, picas, and points. These may be made from a variety of materials, typically metal or clear plastic. Practical rulers have distance markings along their edges.ДЄ line gauge is a type of ruler used in the printing industry. Classically, long measuring rods were used for larger projects, now superseded by tape measure, surveyor's wheel or laser rangefinders.Дesk rulers are used for three main purposes: to measure, to aid in drawing straight lines, and as a straight guide for cutting and scoring with a blade. Rigid wooden or plastic yardsticks, 1В yard long, and meter sticks, 1 meter long, are also used. Longer rulers, e.g., 18В in (46В cm), are necessary in some cases.

Shorter rulers are convenient for keeping in a pocket. 12 in or 30 cm in length is useful for a ruler to be kept on a desk to help in drawing. Metal is used for more durable rulers for use in the workshop sometimes a metal edge is embedded into a wooden desk ruler to preserve the edge when used for straight-line cutting.

Plastics have also been used since they were invented they can be molded with length markings instead of being scribed. Rulers have long been made from different materials and in multiple sizes.