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A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]
Its closest cousin among common, modern tools, is the combination square, which shares with the Odd Job the functions of scribing, squaring, level/plumb, and the sliding and locking ruler [2] (originally a 12 inch wooden ruler with a built-in trammel point was included with units bundled with a ruler, [3] but this was often changed and many are ...
During and after World War II the company continued to produce thousands of rulers and other measuring instruments. After remaining in family hands for 96 years, the Westcott Rule Co. was sold in 1968 to Acme Shear Company of Bridgeport , Connecticut , which was a manufacturer of shears and medical equipment .
A rule, now better known as a ruler and similar to a yard stick, is used to measure. Repeated measurements often use a storey pole; Carpenter's marks were made with a race knife, chisel, gouge, saw, grease pencil, chalk pencil, or lead pencil. Chalk line or ink line used to snap lines on the wood. Ink and a slurry of charcoal were used like chalk.
A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale. In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale.
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