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A thread gauge, [1] also known as a screw gauge [2] or pitch gauge, [3] is used to measure the pitch or lead of a screw thread. Thread pitch gauges are used as a reference tool in determining the pitch of a thread that is on a screw or in a tapped hole. This tool is not used as a precision measuring instrument, rather it allows the user to ...
A micrometer, sometimes known as a micrometer screw gauge (MSG), is a device incorporating a calibrated screw for accurate measurement of the size of components. [1] It widely used in mechanical engineering , machining , metrology as well as most mechanical trades, along with other dimensional instruments such as dial , vernier , and digital ...
In 1662, Sir Christopher Wren invented the mechanical, self-emptying, tipping bucket rain gauge. In 1714, Gabriel Fahrenheit creates a reliable scale for measuring temperature with a mercury-type thermometer. [2] In 1742, Anders Celsius, a Swedish astronomer, proposed the 'centigrade' temperature scale, the predecessor of the current Celsius ...
A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature; and (2) some means of converting this change into a numerical value (e.g. the visible scale that is marked on a mercury ...
The first sealed thermometer was constructed in 1654 by the Grand Duke of Tuscany, Ferdinand II. [1]: 19 The development of today's thermometers and temperature scales began in the early 18th century, when Daniel Gabriel Fahrenheit produced a mercury thermometer and scale, both developed by Ole Christensen Rømer.
In the last years of the company's Chicago factory, it owned a number of aging six-spindle Brown & Sharpe and New Britain screw machines. Stewart-Warner had other locations, including at 2600 North Pulaski in Chicago, and in later years a distribution center in Elgin, Illinois, located just south of I-90 and east of Rt. 25. [2]
Measuring instruments in fiction: Captain Nemo and Professor Aronnax contemplating thermometers, barometers, clocks, etc. in Jules Verne's 1869-1870 science fiction novel Twenty Thousand Leagues Under the Seas Fun measuring instruments: a Love Meter and strength tester machine at a Framingham, Massachusetts rest stop.
There were many manufacturers of engine thermometers: they used different, and sometimes complicated, designs to get a reliable and accurate gauge. American Motor Safety Corp., Kalamazoo, Michigan; "Unbreakable Hydrometer [7] Great Northern Sales Co., "Bemometer" [8] G. H. Morden Co., London, "The Morden Indicator" [9]