This illustration dates to the 1870s and shows Whitworth's measuring machine. Sir Joseph Whitworth (1803-1887) was an English engineer, entrepreneur, inventor and philanthropist.[2] In 1841, he devised the British Standard Whitworth system. Although he did not take on large developments such as railways and steamships, he produced the machine tools, which made these developments possible. Shown here is one of the measuring machines he devised. He used them to develop his own system of standard gauges, although standard gauges had been in use since 1825. Fig. 30 represents one of his measuring
This illustration dates to the 1870s and shows Whitworth's measuring machine. Sir Joseph Whitworth (1803-1887) was an English engineer, entrepreneur, inventor and philanthropist.[2] In 1841, he devised the British Standard Whitworth system. Although he did not take on large developments such as railways and steamships, he produced the machine tools, which made these developments possible. Shown here is one of the measuring machines he devised. He used them to develop his own system of standard gauges, although standard gauges had been in use since 1825. Fig. 30 represents one of his measuring machines, 89intended for practical use in the workshop, to test the dimensions of pieces of metal where great precision is required. The base of the machine is constructed of a rigid cast iron bed bearing a fixed headstock, A, and a movable one, B, the latter sliding along the bed, C, with a slow movement, when the handle, D, is turned. This slow motion is produced by a screw on the axis, a, working in the lower part of the headstock, just as the slide-rest is moved along the bed of the lathe. The movable headstock, when it has been moved into the position required, is firmly clamped by a thumbscrew. The face of the bed is graduated into inches and their subdivisions. Here it should be explained that the machine is not intended to be used for ascertaining the absolute dimensions of objects, but for showing by what fraction of an inch the size of the work measured differs from a certain standard piece. Each headstock carries a screw of 1 20 inch pitch, made with the greatest possible care and accuracy. To the head of the screw in the movable headstock is attached the wheel, b, having its circumference divided into 250 equal parts, and a fixed index, c, from which its graduations may be counted. An exactly similar arrangement is presented in connection with the screw turning in the fixed headstock, but the wheel is much larger, and its circumference is divided in 500 equal parts
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License: Royalty Free
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Keywords: 1800s, 1870s, 19th, british, century, industrial, joseph, machine, measuring, revolution, sir, standard, system, tools, whitworth
