Theodor Schultes

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Theodor Jakob Joseph Schultes (born September 10, 1901 in Berschweiler (Sankt Wendel district) , Saarland , † March 16, 1981 in Starnberg ) was a German high-frequency engineer and a pioneer in radar technology . Among his most famous developments are the radio measuring devices with the code names Freya , Wassermann and Jagdschloß .

Life

Schultes, born as the son of a savings bank director, attended the secondary school in Völklingen until he graduated from high school . After a year of practical work at Röchlingwerke , he studied electrical engineering at the Technical University of Darmstadt from 1921 to 1926 . He then worked there as a research assistant, from 1929 to 1933 as an assistant, and finally received his doctorate in 1934 as a doctoral engineer in the electrical and information technology department .

In 1933 he moved to Berlin, where he continued the research he had begun in Darmstadt in the field of room acoustics at the Heinrich Hertz Institute for Vibration Research. As early as June 1934, he switched to the newly founded Society for Electro-Acoustic and Mechanical Apparatus (GEMA) to take over the management of the research laboratory.

Here Schultes and his team developed the first practical radio measuring devices. One of the main tasks was to develop suitable transmitter tubes . Most of the 50 patents that Schultes submitted by 1941 related to this subject.

On September 26, 1935, Schultes and his research group successfully presented a radio measuring device to the Commander-in-Chief of the Navy, which worked with a wavelength of 82 centimeters and 600 megahertz pulses. The achieved range was around 20 kilometers. For reasons of secrecy, the camouflage designation decimeter telegraphy device (DeTe device) was introduced for such devices . In the summer of 1936, the armored ship Admiral Graf Spee was the first ship in the history of naval warfare to be equipped by GEMA with a cannon radio measuring device.

In 1937, after further extensive experiments, Schultes developed the Freya radio measuring device . It worked with a wavelength of 240 centimeters, was portable and intended for the detection of flight targets. Freya had a range of around 100 kilometers.

When Siemens & Halske AG had set up its own radio equipment factory in Berlin in 1942, Schultes took over the further development and manufacture of radio measurement equipment there. The Wassermann radio measuring device was created in the same year . It worked in the same wavelength ranges as the "Freya" device, but had a range of up to 250 kilometers thanks to the tenfold transmitter power and greatly enlarged antenna area.

Another invention by Schultes was the hunting lodge , a panoramic all-round vision device designed in 1943 . With it, all aircraft that were located in the electronically scanned airspace at a distance of up to 150 kilometers could be displayed on a large display board.

After the end of the Second World War, Schultes temporarily worked in a private laboratory to solve electromedical and electroacoustic problems, since research in the field of radar technology had been banned in Germany by the Allied Control Council .

From 1948 Schultes was able to work again in his field. He was initially employed by the Siemens subsidiary Albiswerk Zürich AG in Switzerland and then moved to Siemens AG in Munich in 1952, where he took on the position of plant manager in 1956.

When Industrieanlagen-Betriebsgesellschaft mbH (IABG) was founded in Ottobrunn in 1961, Schultes represented the interests of Siemens as a member of the founding committee. From 1963 until his retirement in 1971 he was the technical and scientific director of IABG.

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