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The most common ion gauge is the hot-cathode Bayard–Alpert gauge, with a small ion collector inside the grid. A glass envelope with an opening to the vacuum can surround the electrodes, but usually the nude gauge is inserted in the vacuum chamber directly, the pins being fed through a ceramic plate in the wall of the chamber. Hot-cathode ...
I think this page is misleading and inaccurate, but I am not enough of an expert to rewrite it. Firstly, Magnahelic appears to be a common misspelling of Magnehelic [1], which is a trademark owned by Dwyer instruments used to refer to their range of differential low pressure gauges. Secondly, they are used for many different applications, not ...
A gauge theory is a type of theory in physics.The word gauge means a measurement, a thickness, an in-between distance (as in railroad tracks), or a resulting number of units per certain parameter (a number of loops in an inch of fabric or a number of lead balls in a pound of ammunition). [1]
Dehmelt got inspiration from the vacuum gauge built by F. M. Penning where a current through a discharge tube in a magnetic field is proportional to the pressure. Citing from H. Dehmelt's autobiography: [5] Sectional view of a hyperbolic Penning trap as used by Dehmelt, with electric and magnetic field lines indicated.
Further, the vacuum in the gauge eventually deteriorates due to slow diffusion of gases through the mercury, making the device inaccurate. [8] In 1938, Adolph Zimmerli (1886–1967) [9] invented a gauge that overcame the filling problems, at least for pressures below ambient pressure. [10] Zimmerli's gauge consists of three relatively wide columns.
The Willem I railway station was originally a transshipment point between the 4 ft 8 + 1 ⁄ 2 in (1,435 mm) gauge branch from Kedungjati to the northeast and the 3 ft 6 in (1,067 mm) gauge line onward towards Yogyakarta via Magelang to the south. It is still possible to see that the two sides of the station were built to accommodate different ...
They were wuilt for the 3 p.m. express from Bristol to Swindon, and although they ceased work with the end of the broad gauge in May 1892, they were not withdrawn but put into store. [ 10 ] Following the abolition of the broad gauge in 1892, they were renewed as standard gauge 4-4-0 locomotives in 1894, nos. 14 and 16 of the Armstrong class .
A spring scale, spring balance or newton meter is a type of mechanical force gauge or weighing scale. It consists of a spring fixed at one end with a hook to attach an object at the other. [ 1 ] It works in accordance with Hooke's Law , which states that the force needed to extend or compress a spring by some distance scales linearly with ...