Franz Meyer
Franz A. Meyer (* 6 June 1868 in Hamburg; † 29 May 1933 in Jena) was an engineer and designer of optical instruments. His father Claus August Meyer (* 1831) was a painter in Hamburg. His mother was Anne Sophia Elisabeth Sievers (* 1832).
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education
[edit]Franz Meyer studied at the Hamburg State Trade School and then worked for more than ten years in industry and as a freelance engineer.
First activities
[edit]His work at the Berlin mechanical engineering company Paul Hoppe was important for his further development: he played a key role in the design and construction of the large Treptow telescope. This Large Refractor, also known as the sky cannon, is the longest movable telescope in the world. To this day, it is the main attraction of the Archenhold Observatory in Berlin's Treptower Park. This public observatory was built for the Berlin Trade Fair in 1896 to mark the 25th anniversary of Berlin's elevation to the status of capital of the Reich.
First engineer with a university education at Carl Zeiss Jena (1902)
[edit]After leaving the Hoppe company, Franz Meyer spent several years working in general mechanical engineering, especially on hydraulics, until Ernst Abbe was able to recruit him for the Jena Zeiss factory in 1902. Meyer's special feeling for the dimensions and performance limits of the designs led to the famous remark among his employees:
Wenn man eine MEYERsche Konstruktion in irgendeine Richtung – sei es nach Größe, Fehlereinflüssen und Toleranzen – nachrechnet und die Rechnung ergibt Widersprüche mit der Konstruktion, so kann man sicher sein, daß man sich verrechnet hat.[1]
Translation:
If you recalculate a MEYER construction in any direction – be it in terms of size, error influences and tolerances – and the calculation shows contradictions with the construction, you can be sure that you have miscalculated
This is also why he received all sorts of nicknames such as "Kugelmeyer" or "Kettenmeyer".
Astro department
[edit]In 1896, Abbe announced that "before the next year is over, our workshop will be involved in the construction of astronomical telescopes."[2] In August 1897, the astro department was founded at Zeiss. On the one hand, new methods were needed for the production and alignment of optical devices, but on the other hand, drives were needed for the alignment of these optics and for tracking when observing the stars. As a result, the invisible drawing offices were replaced by large design rooms - the "optical workshop" was also linguistically replaced by the name "The Zeiss factory."
Examples of significant innovations and contributions
[edit]
- telescope
- clockwork drive (regulator)[3]
- coordinate measuring machine[4][5]
- interference length dividing machine[6][7]
- parabolic mirror[8]
Relief mount
[edit]Franz Meyer improved the astronomical telescopes through many important innovations. Carl Büchele, his successor from 1933 to 1945, writes:
Der Grundgedanke seiner genialen Entlastungsmontierung - in der Fachwelt heute meist kurz Meyersche Montierung genannt – ist heute wohl Gemeingut aller Astronomen geworden.[9]
Joos experiment 1930
[edit]By producing high-resolution diffraction gratings in a basement room at Zeiss, Franz Meyer came into contact with Georg Joos, who had been a professor of theoretical physics at the University of Jena since 1924. Joos wanted to experimentally prove that Einstein's theory of relativity was exactly valid despite apparently contradictory results. At the same time, the ether hypothesis was also at stake.[10] Promoted by the scientific director of Zeiss, Rudolf Straubel, under the direction of Franz Meyer and with the support of C. Büchele and Ing. Köppen, a construction was developed that pushed the boundaries of what was possible at the time. The device was built in the astronomy workshop. The experiment, with a much higher level of accuracy than the previous results of the Michelson-Morley experiment, is today considered a "decision experiment" (experimentum crucis) for modern physics..[11]
Rewards
[edit]The Friedrich Schiller University of Jena awarded him the title of Dr. h.c. in 1930 for his services to scientific instrument construction – a very rare award for a practicing engineer.
References
[edit]- ^ Werner Bischoff, „Franz Meyer zum Gedenken des 100. Geburtstages“. Jenaer Rundschau 13, (1968) 353-355
- ^ Ernst Abbe, "Memorial speech to celebrate the 50th anniversary of the optical workshop," Collected Essays. Vol. 3: Lectures, speeches and writings on socio-political and related topics, pp. 60-101, Hildesheim, Georg Olms Verlag 1989.
- ^ Alfred Jensch: „Ungesteuerte Antriebe für Astrogeräte“. Jenaer Rundschau H.3,(1967), S. 182.
- ^ Manfred Steinbach : „Ernst Abbes Komparatorprinzip“, Jenaer Jahrbuch für Technik- und Industriegeschichte, Band 7,(2007), S. 9–69.
- ^ Reinhard Schielicke: "Von Sonnenuhren, Sternwarten und Exoplaneten". Astronomie in Jena, Jena 2008 : Verlag Dr. Bussert &Stadeler.
- ^ Lambert Grolle, Manfred Steinbach: „Otto Eppensteins Längenmessmaschine“. Jenaer Jahrbuch für Technik- und Industriegeschichte, Band 13, (2010),S. 13-52.
- ^ Lambert Grolle, (2014): „Dr. Otto Eppenstein und die Entwicklung der Feinmeßgeräte bei Carl Zeiss bis 1945“. Jenaer Jahrbuch für Technik- und Industriegeschichte, 17,(2014), 267-304.
- ^ Harald Straubel:„Der Sonnen-Schmelzspiegel“. Zeitschrift für angewandte Physik 1, 542-545 (1949)
- ^ Carl Büchele, Franz A. Meyer: Zeitschrift für Instrumentenkunde 53, 1933, H.11, 453- 456
- ^ Saller: "Gibt es einen Äther Wind?-Nein", Die Umschau, 35. Jg., 1931.
- ^ Peter Bussemer, Jürgen Müller: „Georg Joos‘ Experimentum Crucis in Jena 1930 and the Fall of the Ethereal Aether“, Annalen d. Physik, Volume 534, Issue10, October 2022