Fritz Pfleumer

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Fritz Pfleumer (born March 20, 1881 in Salzburg , † August 29, 1945 in Radebeul ) was a German-Austrian engineer and the inventor of the tape .

Live and act

Fritz Pfleumer was the son of the Austrian print shop owner Robert Pfleumer, who came from Greiz . From 1897 he completed an engineering degree in Dresden .

In spring 1915, while developing synthetic rubber, the engineers Fritz and his brother Hermann Pfleumer discovered a new material, lignostone, in their Dresden laboratory . In June 1915, a patent was applied for the “method for compacting wood”, which was granted on May 17, 1916. During the First World War, they and partners founded Holz-Veredlung GmbH in Berlin, but it never started production. Since, according to the Versailles Peace Treaty, German patent rights had to be surrendered to the Allies on request, the rights were to be temporarily outsourced abroad. While the Pfleumer brothers withdrew from the company, Ludwig Roselius (HAG) was recruited for this purpose , who, due to the forced management of coffee, had some of the idle facilities. In 1919 he financed the construction of a Lignostone factory in Holland on a license basis. A few years later, Hermann Röchling took over all Lignostone activities.

In 1927 Fritz Pfleumer began to develop a durable bronze lacquer coating for cigarette mouthpieces for the Dresden cigarette machine factory " Universelle " . From his experience with bronze lacquer, he developed a paper strip in 1927 on which hardened steel dust was fixed with lacquer and thus a magnetizable sound carrier - the audio tape . This magnetic tape was far superior to the steel wires and tapes previously used . On January 31, 1928 he patented the process for the production of " phonetic carriers " under the number DRP 544302 with the designation "Process for the production of steel powder" . Also in 1928 he made a prototype of a magnetic tape recorder with which he was able to play the tapes. The tapes were 16 mm wide and had two tracks, the tape speed was 25 cm / s, so that around 900 m of magnetic tape ran off in one hour.

On December 1, 1932, Pfleumer gave AEG the rights to use his magnetic tape. There Eduard Schüller (1904–1976) developed the first production-ready magnetic tape recorder. The device was presented in August 1935 under the name "Magnetophon K 1" together with the magnetic tape "Type C" at the IG Farben at the radio exhibition in Berlin.

Fritz Pfleumer lived in Dresden- Gruna from 1923 until he died in an accident in Radebeul in 1945.

Inventor family Pfleumer

Fritz Pfleumer was the son of Robert Pfleumer (1848–1934), born in Greiz , and Minna Pfleumer, born in Freiberg . Hünich (1846-1932). In addition to Fritz (* 1881), there were all siblings Mimi (* 1877), Hans (* 1880), Hermann (* 1882), Otto (1884–1887) and Mizi (* 1889), who were also born in Salzburg. Hans, also a trained printer like his father, later went to the USA, was naturalized there and, like his two surviving brothers, worked as inventors. Hermann trained as a technician and, like Fritz, went to Dresden by 1915 at the latest. As early as 1906/1907, the family registered patents in several European countries for a “motor vehicle tire filling and foam production”, which identifies the inventor and applicant as “Pfleumer, Fritz, Hans, Hermann, Mimi, Mizi, Robert”, i.e. the father with all children. Further patents for this environment from Fritz followed in other countries in the following years.

literature

Web links

Individual evidence

  1. ^ Fritz Pfleumer, A German Engineer (1881–1945). To commemorate his 125th birthday. In: Anniversaries and Biographies 2006 [Persons: March] ( Memento of the original from September 23, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , German Society for Post and Telecommunications History @1@ 2Template: Webachiv / IABot / www.dgpt.org
  2. ^ Archives of the City of Salzburg, Heimatstammbuch, sheet "Pfleumer, Robert" (undated, last recorded event: June 13, 1934 when Robert Pfleumer died)
  3. ↑ Friedrich Engel, Gerhard Kuper, Frank Bell, and Joachim Polzer: Zeitschichten: Magnetic tape technology as a cultural medium - inventor biographies and inventions - Chronology of magnetic tape technology and its use in radio, music, film and video production . Polzer Media Group, 2007.
  4. ↑ Patents GB 190603314; CH 36677; CH 36363; AT 31914; DK 9209
personal data
SURNAME Pfleumer, Fritz
BRIEF DESCRIPTION German-Austrian engineer and the inventor of the audio tape
DATE OF BIRTH March 20, 1881
PLACE OF BIRTH Salzburg
DATE OF DEATH August 29, 1945
Place of death Radebeul