Dezső Korda

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Dezső Korda (born January 8, 1864 in Kisbér , Komárom-Esztergom county ; † April 1, 1919 in Zurich ; also Désiré or Desider Korda ) is considered to be the inventor of the variable capacitor .

Life

After studying electrical engineering in Budapest , he settled in France and worked for various companies for 28 years (including the French AEG; Societé Electro-Chimie de Basel ; chief designer and later as managing director of Société de Fives-Lilles ).

On June 8th, 1892 Desider Korda from Paris received a German patent (No. 72447) for an electrical capacitor with variable capacitance by changing the length of the plates . It is a rotary capacitor with a liquid dielectric, which is used to compensate for mutual induction and contains an automatic actuator. On November 14, 1907, Désiré Korda, together with Alexander Heyland from Brussels, received the patent for the unipolar AC / DC machine to be used as a converter (DRP 191 897, valid from March 2, 1906).

He may later also develop a rotating frequency converter .

He planned a first electric automobile.

He also dealt with metallurgy and made alloys such as B. ferrosilicon for electrical engineering. He also received a patent for the treatment of sulfur-containing copper-zinc ores in the converter .

He was also involved in mathematical research and the regulation of the Danube.

For his scientific results he was awarded the Legion of Honor .

When he lost his position and fortune there during the First World War , he became a private lecturer in wireless telegraphy and high-frequency machines at the ETH Zurich .

Publications

  • La séparation électromagnétique et électrostatique des minerais ; by Désiré. Korda.
  • Desiré Korda: La transformation Heyland-Korda ; Lum. él. 5 (1909) 5, pp. 138-143, and 5 (1909) 6, pp. 171-175. Note also in: Electrical Review, New York 51 (1909) 10, p. 448.
  • Theory d 'un condensateur intercale dans le circuit secondaire d' un transformateur (Académie des sciences. Comptes rendus… 1892);
  • Metal compounds that can be produced in an electric furnace (Mathematical and Scientific Reports from Hungary, 1901).
  • On the theory of static frequency converters. By Ing. Désiré Korda, lecturer at the ETH Zurich ; ETZ 39 (1918), p. 486.

literature

  • Irod. DK 1864-1919 ; Electrotechnical Journal, 1919.

Web links

Individual evidence

  1. ↑ George Washington Pierce: Principles of wireless telegraphy , McGraw-Hill book company, New York, 1910, p. 114. (With photo of the variable capacitor from Korda).
  2. ↑ http://lexikon.meyers.de/wissen/Frequenzumwandler towards GenealogieToter Link | date = 2018-04 | archivebot = 2018-04-06 11:22:10 InternetArchiveBot | url = http://lexikon.meyers.de / know / frequency converter}} (link no longer accessible)
  3. ↑ ETZ 40 (1919) 28, p. 342.
personal data
SURNAME Korda, Dezső
ALTERNATIVE NAMES Korda, Désiré; Korda, desider
BRIEF DESCRIPTION Hungarian inventor
DATE OF BIRTH January 8, 1864
PLACE OF BIRTH Kisbér , Komárom-Esztergom County , Hungary
DATE OF DEATH April 1, 1919
Place of death Zurich