Martin Kallmann

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Martin Kallmann around 1910

Martin Kallmann (born June 4, 1867 in Nakel ; † November 29, 1911 in Berlin ) was a German electrical engineer and the first city electrician in Berlin.

Life

Kallmann graduated from university at the age of 17, studied mathematics and physics at the University of Heidelberg and then at the University of Berlin . During his studies in Berlin he worked under Hermann von Helmholtz and gave exercises and laboratory courses at the Technical University of Charlottenburg . In 1885 , Kallmann received his doctorate from the University of Halle with a thesis on "The generation of sounds through electricity".

Kallmann then worked for AEG ( Allgemeine Elektricitäts-Gesellschaft ) and its subsidiary, Berliner Elektricitäts-Werken (BEW, later BEWAG ) as a company electrician. Here he distinguished himself through work and inventions that were important for the electricity company. In 1893 the city of Berlin offered him the newly created office of city electrician in Berlin . From 1901 Kallmann also taught electrical engineering with a focus on operational and safety technology at the Royal Technical University of Berlin , first as a private lecturer , from November 1907 as a professor .

After a long illness, Kallmann died in Berlin at the age of 44.

Publications

  • About a self-regulating load resistor and its use as a comparison kilowatt. In: Elektrotechnische Zeitschrift (ETZ), Volume 27, Issue 3 (January 18, 1906), pp. 45–49.
  • Differential voltmeter for direct and alternating current (variation resistance system). In: Elektrotechnische Zeitschrift (ETZ), Volume 27, Issue 14 (April 5, 1906), pp. 335–338.
  • Via a new process for automatic voltage and insulation control. In: Elektrotechnische Zeitschrift (ETZ), Volume 27, Issue 29 (July 19, 1906), pp. 686–690 and Issue 30 (July 26, 1906), pp. 710–713.
  • A new method for automatic starting of electric motors. In: Elektrotechnische Zeitschrift (ETZ), Volume 28, Issue 19 (May 9, 1907), pp. 495–497 and Issue 20 (May 16, 1907), pp. 518–521.
  • A new system for automatic short-circuit braking for electric motors. In: Elektrotechnische Zeitschrift (ETZ), Volume 28, Issue 39 (September 26, 1907), pp. 945–948.
  • The prevention of extra current sparks (variation magnetic switch). In: Elektrotechnische Zeitschrift (ETZ), Volume 29, Issue 47 (November 19, 1908), pp. 1134–1136.
  • Optical voltage control by means of an electricity meter. In: Elektrotechnische Zeitschrift (ETZ), Volume 30, Issue 40 (October 7, 1909), pp. 954–955.

literature

  • Dr. Martin Kallmann † . In: Elektrotechnische Zeitschrift (ETZ), Volume 32, Issue 50 (December 14, 1911), p. 1281.

supporting documents

  1. ↑ a b ETZ 1911
  2. ↑ Royal Technical University of Berlin: Program for the academic year 1901–1902 (PDF; 13.6 MB)
  3. ↑ Official notices . In: Zentralblatt der Bauverwaltung, Volume 27, No. 93 (November 16, 1907), p. 601.
personal data
SURNAME Kallmann, Martin
BRIEF DESCRIPTION German electrical engineer
DATE OF BIRTH June 4, 1867
PLACE OF BIRTH Nacle
DATE OF DEATH November 29, 1911
Place of death Berlin