504 History of the Cross Capacitor
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The Cross Capacitor is a calculable capacitor whose absolute capacitance is determined from one length measurement of its electrodes. Since the principle of this capacitor was found in 1956, its development has been continued to rise the accuracy. This is an important device to connect the unit of length, meter the mechanical quantity with the unit of capacitance, farad the electrical quantity. The history of the developments, some of them the author had worked with, is reviewed.
