Arthur E Thiessen's A history of the General Radio Company PDF

By Arthur E Thiessen

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However, with all the drawbacks, cathode-ray tubes did have some useful applications, and, in 1931, GR marketed the first commercial instrument with tubes first obtained from Manfred von Ardenne in Germany, and later from Westinghouse. It was in two parts. The tube was mounted separately on a stand, and the power supply, in a separate cabinet, was connected to it by a cable. By this time Professor Frederick Bedell of Cornell University had invented the so-called linear sweep circuit, which did, at last, provide a means to traverse the spot across the screen at a constant speed and with a steady display.

They were C. T. Burke, J. K. Clapp, C. E. , H. W. Lamson, P. K. McElroy, W. H. Sherwood, and A. E. Thiessen. A year later two more, R. F. Field and H. S. Wilkins, were added, and the number has grown steadily since. By 1930 the Company had again outgrown its quarters, and a third building was completed, increasing the plant size by about 60 percent for a total of 66,500 square feet. That year employment was 142, divided about as follows: manufacturing 95; office 47. There had been only a small increase in the number employed over the preceding four or five years, but the shift out of radio parts production into instruments necessitated more manufacturing and laboratory space.

The accurate measurement of resistance. capacitance, and inductance at radio frequencies had always been a difficult and time-consuming job, utilizing the voltmeter-ammeter or the so-called substitution methods. Following a long period of development, Robert F. Field (Brown University '06) designed the first radio-frequency bridge, the Type 516-A, which was announced in 1932. This instrument greatly simplified and made much more accurate those previously difficult measurements. 37 The first sound-level meter, which had been under development by Herman H.

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A history of the General Radio Company by Arthur E Thiessen


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