Hans Reissner Papers, 1881-1984 (MSS 0030)

Extent: 4 Linear feet (6 archives boxes and 5 oversize folders.)

Papers of Hans Reissner (1874-1967), aeronautical engineer, physicist, professor, and researcher. Reissner designed the first successful aircraft with all-metal wing and tail surfaces and the first controllable-pitch propeller. He began his career in Germany, working with Ferdinand Zeppelin, Hugo Junkers and also teaching. He immigrated to the United States in 1938 and taught at the Illinois Institute of Technology (1938-1944) and the Polytechnic Institute of Brooklyn (1944-1954). Materials include correspondence, much of it relating to German aviation development in the early twentieth century; published and unpublished articles documenting Reissner's work in Germany and the United States; propeller patents (1919-1946); an aerial bombing chart (1915); teaching materials dated after 1937; photographs of early German aircraft; and, photographs of Hans Reissner. The Hans Reissner Papers are arranged in eight series: 1) BIOGRAPHICAL MATERIAL, 2) CORRESPONDENCE, 3) WRITINGS BY HANS REISSNER, 4) WRITINGS OF OTHERS, 5) LECTURES AND TEACHING MATERIAL, 6) PATENTS, 7) SUBJECT FILES, and 8) ORIGINALS OF PRESERVATION PHOTOCOPIES.

Hans Jacob Reissner was born on January 18, 1874, in Berlin, Germany. He earned a degree in civil engineering from Berlin's Technische Hochschule in 1897, then spent a year in the United States working as a structural draftsman. Reissner returned to Germany to study physics with Max Planck at Berlin University. In 1900 he changed direction and attended the Technische Hochschule, where he studied under Heinrich Mueller-Breslau and completed one of the first engineering doctorates in 1902. His dissertation was on vibrations of framed structures. Reissner joined the faculty at Berlin's Technische Hochschule, but he also worked on outside projects, including structural analysis for Count Zeppelin. In 1904, he was awarded a fellowship to study the use of iron in construction in the United States.

In 1906, Reissner returned to Germany and was appointed professor of mechanics at the Technische Hochschule in Aachen. Up until this time his research had dealt with topics at the intersections of mechanics and physics, but his attention now focused upon the new field of aviation. By 1908 he was familiar enough with the basic areas of aircraft stability, control and propulsion to deliver a seminal paper published as "Wissenschafliche Fragen aus der Flugtechnik," the first of many articles on these topics. Hugo Junkers, also on the faculty at Aachen, and Reissner designed and constructed the first successful all-metal and tail-first airplane, the "Ente."

After seven years in Aachen Reissner was invited to return to Berlin's Technische Hochschule in 1913 as professor of mathematics in the civil engineering department. During World War I he was responsible for the structural analysis of the Staaken four-engine bomber and designed the first controllable-pitch propellers for this aircraft. He was awarded the Iron Cross for civilians for his work.

In 1938, Reissner immigrated to the United States, where he taught first at the Illinois Institute of Technology (1938-1944) and then at the Polytechnic Institute of Brooklyn (1944-1954). For his seventy-fifth birthday in 1949 he was honored with the presentation of a festschrift, the REISSNER ANNIVERSARY VOLUME, at a dinner in New York.

Reissner retired from professional life in 1954 and died in 1967.

The Hans Reissner Papers document the career of a professor, researcher and aeronautical engineer during the development of early-twentieth century German aviation. The materials include correspondence, reprints, manuscripts, personal documents, patents, mechanical drawings, and photographs. Most of the material dated prior to 1938 is in German.

The papers are arranged in eight series: 1) BIOGRAPHICAL MATERIAL, 2) CORRESPONDENCE, 3) WRITINGS BY HANS REISSNER, 4) WRITINGS OF OTHERS, 5) LECTURES AND TEACHING MATERIAL, 6) PATENTS, 7) SUBJECT FILES, and 8) ORIGINALS OF PRESERVATION PHOTOCOPIES.

SERIES 1: BIOGRAPHICAL MATERIAL

The BIOGRAPHICAL MATERIAL series contains photographs, awards, memorabilia, and articles summarizing Reissner's career that were published on the occasion of his seventy-fifth birthday and following his death in 1967. Eric Reissner's article entitled "Hans Reissner, Engineer, Physicist and Engineering Scientist" provides a narrative of his father's life and intellectual achievements. For additional biographical materials see also Series 2B: General Historical Files.

The "personal documents" folder is arranged chronologically and includes academic, health, residence, travel, and work records for Reissner, as well as birth and death certificates for family members. There are also two documents from the German war department, dated December 19, 1913, and July 3, 1914.

SERIES 2: CORRESPONDENCE

The CORRESPONDENCE series is arranged in two subseries: A) Hans Reissner Correspondence, A-Z and B) Eric Reissner, Reference Correspondence.

A) The first subseries is arranged alphabetically by correspondent and contains correspondence with colleagues and those involved with the patenting and construction of aircraft. There is a long exchange with Moritz Straus (1929-1946) and three letters from Erwin Schrodinger written in 1926. The correspondence with Ludwig Durr, Ernst Uhland and Ferdinand Zeppelin dates from the period when he worked as a structural analyst for Zeppelin. Photographs and mechanical drawings of early biplane construction are located in the "Deutsche Versuchsanstalt fur Luftfahrt" file.

B) The second subseries consists of Eric Reissner's reference correspondence files on topics associated with his father's work and role in aviation history. The materials are arranged alphabetically by subject. The "General Historical" files document the contributions of Reissner, Hugo Junkers and Ludwig Prandtl to aircraft development and include photographs of the "Ente," the first succcessful all-metal and tail-first airplane.

SERIES 3: WRITINGS BY HANS REISSNER

The WRITINGS BY HANS REISSNER series is arranged in three subseries: A) Published, B) Unpublished and C) Notebooks.

A) The Published subseries largely contains Reissner's journal articles and technical writings arranged according to a numbered publication list that begins the subseries. Publications not on the list are interfiled by date. The subseries contains 54 of the 97 listed works, of which 42 are in German and 12 are in English. Although some article files include drafts, computations and notes, most of the articles are in printed form.

B) The Unpublished subseries contains manuscript papers and analytical reports arranged alphabetically. Included is Reissner's highly detailed structural analysis of Count Zepplin's airship entitled "Erlauterungsbericht zu dem Entwurf eines Luftschiffes - System Sr. Excellenz, des Grafen von Zeppelin."

C) Notebooks contain reports, calculations and design specifications and are arranged alphabetically by title.

SERIES 4: WRITINGS OF OTHERS

The WRITINGS OF OTHERS series includes articles by Ferdinand Zeppelin and others about his airship, two dissertations for which Reissner served as adviser, a collection of reviews of Reissner's publications, and reviews of the REISSNER ANNIVERSARY VOLUME, a festschrift presented to him on his seventy-fifth birthday.

SERIES 5: LECTURES AND TEACHING MATERIAL

This series contains material in English for lectures Reissner gave at the Massachusetts Institute of Technology and the 1943 lecture entitled "Aviation Technology of Two Wars," in which Reissner reviews technical aspects of the development of aircraft and his own contributions to aircraft structure and propeller design. The materials are arranged alphabetically.

SERIES 6: PATENTS

The PATENTS series, arranged by date, comprises Reissner's German, British and American patents for controllable pitch propellers. The last folder in this series contains patent documentation and notes.

SERIES 7: SUBJECT FILES

This series contains mechanical drawings for airplane wings, propellers and bridges. There are brochures and accounting information for propeller manufacturers, a 1915 ballistics chart for aerial bombing, Reissner's scrapbook of propeller photographs, and material relating to curriculum reform for Germany's Technische Hochschule system in 1919.

SERIES 8: ORIGINALS OF PRESERVATION PHOTOCOPIES

This series contains the originals of brittle or high-acid content documents that have been photocopied.

Container List

BIOGRAPHICAL MATERIAL

Box 1 Folder 1
Articles about Hans Reissner, 1964 - 1977
Box 1 Folder 2
Awards, certificates and diplomas
Oversize MC-035-03
Awards, certificates and diplomas - Oversize
Box 1 Folder 4
Personal documents, 1881 - 1938
Box 1 Folder 5
Photographs - Hans Reissner
Box 1 Folder 6 Oversize FB21002
Seventy-fifth Anniversary Dinner [Scrapbook], January 18, 1949, in Honor of Dr. Hans Reissner..., 1949

Includes guest list, correspondence and press clippings.

CORRESPONDENCE

Hans Reissner Correspondence, A-Z

Box 1 Folder 7
A - Miscellaneous
Box 1 Folder 8
Aeroquip Corporation, 1941
Box 1 Folder 9
Albatroswerke G.m.b.H., 1914
Box 1 Folder 10
Argus Motoren Gesellschaft m.b.H., 1935 - 1941
Box 1 Folder 11
Aviation Manufacturing Corporation, 1936

Includes three British patents on propellers.

Box 1 Folder 12
B - Miscellaneous
Box 1 Folder 13
Bruckmann, Wilhelm, 1909
Box 1 Folder 14
Curtiss-Wright Corporation. Curtiss Propeller Division, 1942
Box 1 Folder 15
D - Miscellaneous
Box 1 Folder 16
Deutsche Versuchsanstalt fur Luftfahrt, e.v., 1914

Includes "Bericht uber den Prufungsauftrag P.49 - Erprobung der Tragwirkung des Schraubenwindes auf Flugel und Flossen eines Albatros-Doppeldeckers," with mechanical drawings and photographs of biplane construction.

Box 1 Folder 17
Durr, Ludwig, 1902
Box 1 Folder 18
F - Miscellaneous
Box 1 Folder 19
G - Miscellaneous
Box 1 Folder 20
General Motors Corporation. Aeroproducts Division, 1941

See also Series 2A: Taylor, E.S.

Box 1 Folder 21
H - Miscellaneous
Box 1 Folder 22
Hirsch, Peter, 1939 - 1941
Box 1 Folder 23
Hunsacker, J.C., 1941
Box 1 Folder 24
K - Miscellaneous
Box 1 Folder 25
Knight, William, 1921
Box 1 Folder 26
Krohn, Reinhold, 1922
Box 1 Folder 27
L - Miscellaneous
Box 1 Folder 28
M - Miscellaneous
Box 1 Folder 29
Minckin-Metallwerke, 1902
Box 1 Folder 30
N - Miscellaneous
Box 1 Folder 31
O - Miscellaneous
Box 1 Folder 32
P - Miscellaneous
Box 1 Folder 33
Prandtl, Ludwig, 1911 - 1950
Box 1 Folder 34
R - Miscellaneous
Box 1 Folder 35
Reiser, Leo, 1941
Box 1 Folder 36
Reissner, Eric, (son), 1951 - 1952
Box 1 Folder 37
Reissner, Hans

Letters to unidentified correspondents.

Box 1 Folder 38
Reissner, Josephine, (wife), 1914
Box 1 Folder 39
Reissner, Max, (father), 1909
Box 1 Folder 40
S - Miscellaneous
Box 1 Folder 41
Schrodinger, Erwin, 1926
Box 2 Folder 1
Straus, Moritz, 1929 - 1946
Box 2 Folder 2
T - Miscellaneous
Box 2 Folder 3
Taylor, E.S., 1941

See also Series 2A: General Motors Corporation. Aeroproducts Division.

Box 2 Folder 4
U - Miscellaneous
Box 2 Folder 5
Uhland, Ernst, 1902 - 1903
Box 2 Folder 6
W - Miscellaneous
Box 2 Folder 7
War Department. Air Corps. Materiel Division, 1941
Box 2 Folder 8
Zeppelin, Ferdinand, 1902 - 1903
Box 2 Folder 9
Unidentified correspondents

Letters to Reissner.

Eric Reissner, Reference Correspondence

Box 2 Folder 10
Aachen -- Aeronautics, 1966 - 1982
Box 2 Folder 11
Correction of Errors Concerning H. Reissner's Work in Aachen, 1993
Box 2 Folder 12
General Historical - Part 1

Includes issue of FLUGSPORT (January 1928) and a festschrift for Hugo Junkers entitled HUGO JUNKERS: PIONIER DER INDUSTRIELLEN FORSCHUNG.

Box 2 Folder 13
General Historical - Part 2

Includes JAHRBUCH 1954: DER WISSENSCHAFTLICHEN GESELLSCHAFT FUR LUFTFAHRT E.V.

Box 2 Folder 14
General Historical - Photographs of early aircraft
Box 2 Folder 15
Gesellschaft fur angewandte Mathematik und Mechanik (GAMM)
Box 2 Folder 16
Propeller Theory and Design (Variable Pitch)
Box 2 Folder 17
Reissner-Nordstrom, 1981 - 1982
Box 2 Folder 18
Schrodinger, 1984
Box 2 Folder 19
Schulz, Werner, 1968 - 1981

Includes biographical sketch and list of Hans Reissner's publications published in DER STAHLBAU, 1959.

WRITINGS BY HANS REISSNER

Published

Box 2 Folder 20
List of Hans Reissner's publications, 1967

Published in JAHRBUCH 1967 DER WGLR.

Box 2 Folder 21
Unnumbered. "Eine neue Fahrbahnanordnung fur eiserne Strafsenbrucken", 1897

With M. Gruning.

Box 3 Folder 1
1. "Uber Fahrbahnuberhohung", 1899
Box 3 Folder 2
3. "Schwingungsaufgaben aus der Theorie des Fachwerks", 1902

Dissertation.

Box 3 Folder 3
6. "Schwingungsaufgaben aus der Theorie des Fachwerks", 1903
Box 3 Folder 4
10. "Eine Bemerkung uber Gravitations- und Elektronische Masse", 1905
Box 3 Folder 5
12. "Amerikanische Eisenbauwerkstatten", 1906
Box 3 Folder 6
13. "Uber Fachwerke mit Zyklischer Symmetrie", 1907

Includes correspondence.

Box 3 Folder 7
14. "Uber die Spannungsverteilung in Zylindrischen Behalterwanden", 1908
Box 3 Folder 8
15. "Wissenschafliche Fragen aus der Flugtechnik", 1908
Box 3 Folder 9
16. "Uber die Knicksicherheit ebener Bleche", 1907
Box 3 Folder 10
19. "Die Seitensteuerung der Flugmaschinen", 1910
Box 3 Folder 11
21, 23, 28. "Studien zur Berechnung und Planmassigen Prufung der Luftschrauben", 1910 - 1912

Bound together.

Box 3 Folder 12
22. "Theorie des Erddrucks", 1910
Box 3 Folder 13
Unnumbered. "Das Propeller-Problem", 1911
Box 3 Folder 14
25. "Spannungen in Kugelschalen (Kuppeln)", 1911
Box 3 Folder 15
29. "Einige Bemerkungen zur Seitenstabilitat der Drachenflieger", 1912
Box 3 Folder 16
38. "Uber die Eigengravitation des Elektrischen Feldes nach der Einsteinschen Theorie", 1916
Box 3 Folder 17
39. "Festigkeitsberechung der Flugzeugholme", 1916

With E. Schwerin.

Box 3 Folder 18
40. "Uber die Biegungsbeanspruchung von Schraubenpropellern und die Entlastende Wirkung der Zentrifugalkraft", 1917 - 1918
Box 3 Folder 19
41. "Die Biegungslinie des Vollkommen Elastichen Stabes Infolge Langskraft und Querbelastung in der Nahe...", 1918
Box 3 Folder 20
43. "Wirkungsweiser und Anwerdungsgebiet von Verstellbaren Luftschrauben", 1920
Box 3 Folder 21
46. "Bemerkungen zur Abferderung der Motorwagen", 1921
Box 3 Folder 22
47. "Stationarer Bewegungszustand Einer Schraubenformigen Wirbelflache", 1922
Box 3 Folder 23
48. "Uber die Kraftschlussigkeit von Zahnradgetrieben, Insbesondere fur Schiffspropeller", 1924
Box 3 Folder 24
49. "Zum Erddruckproblem", 1924

Includes galleys and uncut page proofs.

Box 3 Folder 25
51. "Energiekriterium der Knicksicherheit", 1925
Box 3 Folder 26
53. "Beitrag zur Theorie des Elektrons", 1925
Box 3 Folder 27
54. "Uber eine Moglichkeit, die Wesentlichen Eigenschaften von Kern und Elektron...", 1925
Box 3 Folder 28
Unnumbered. Book review of DIE ELASTISCHEN PLATTEN by A. Nadai, 1926
Box 3 Folder 29
Unnumbered. "Die Grundlagen der Elasticitatstheorie. A. Spannungen", 1926
Box 3 Folder 30
58. "Augenstabproblem und Verwandte Aufgaben", 1928
Box 3 Folder 31
60. "Uber den Einfluss der Inneren Reibung auf die Stabilitat Rotierender Wellen", 1929
Box 3 Folder 32
62. "Allgemeine Statik (und Graphische Statik) der Systeme Starrer Korper", 1929
Box 3 Folder 33
Unnumbered. Book review of DIE KRAFTFELDER IN FESTEN ELASTISCHEN KORPERN UND IHRE PRAKTISSSCHEN ANWENDUNGEN, 1929

By Th. Wyss.

Box 3 Folder 34
65. "Warum ich den 'Enten' Flugzeugtyp nicht Weiter Forderte", 1930
Box 3 Folder 35
67. "Eigenspannungen und Eigenspannungsquellen", 1931
Box 3 Folder 36
Unnumbered. Review of DIE RELATIVITATSTHEORIE by Dr. Ludwig Hopf, 1931
Box 3 Folder 37
68. "Theorie der Biegungsschwingungen Frei Aufliegender Rechteckplatten Unter dem Einfluss Beweglicher...", 1931

(Bemerkung zur Arbeit von H. Schmidt.)

Box 3 Folder 38
71. "Ringplatte und Augenstab", 1933

With Fr. Strauch.

Box 3 Folder 39
72. "Formanderung, Spannung und Kleine Schwingungen von Staben mit Anfanlicher Krummung und Verwindung...", 1933

Erste Mitteilung.

Box 3 Folder 40
73. "Formanderung und Spannungen Einer Dunnwandigen, an den Randern Frei Aufliegenden, Beliebig Belasteten...", 1933

Eine Erweiterung der Navierschen Integrationsmethode.

Box 3 Folder 41
74. "Spannungsverteilung in der Gurtplatte einer Rippendecke", 1934
Box 3 Folder 42
75. "Ebene und Raumliche Stromung Zaher, Inkompressibler, Tragheitsfreier Flussigkeiten Zwischen...", 1935

Mitteilung 1.

Box 3 Folder 43
76. "Ebene und Raumliche Stromung Zaher, Inkompressibler, Tragheitsfreier Flussigkeiten Zwischen...", 1936

Mitteilung 2.

Box 3 Folder 44
77. "Ubergangsbogen fur Eisenbahnen und Autorennbahnen", 1937
Box 3 Folder 45
79. "On the Relation Between Thrust and Torque Distribution and the Dimensions and Arrangement of Propeller", 1937

Includes typed draft.

Box 3 Folder 46
80. "Senkrechte und Schrage Durchtritt Einer in Einem Flussigen Medium Erzeugten Ebenen Dilatations-...", 1938
Box 3 Folder 47
81. "Elastic Instability of Tubular and Panel Shaped Cylindrical Shells", 1938
Box 3 Folder 48
82. "Generalized Vortex Theory of the Screw Propeller and Its Application", 1940
Box 3 Folder 49
83. "Wing of Minimum Total Resistance", 1940
Box 4 Folder 1
84. "On Lubrication Flow with Periodic Distribution Between Prescribed Boundaries", 1941
Box 4 Folder 2
85. "Theory of Propellers", 1942
Box 4 Folder 3
86. "Graphical Statics", 1942
Box 4 Folder 4
87. "Aerodynamic Center, Control and Stability of Airplanes", 1943
Box 4 Folder 5
88. "Oscillations of Suspension Bridges", 1943
Box 4 Folder 6
89. "Aeronautical Engineering Courses for Undergraduate and Graduate Curricula", 1943
Box 4 Folder 7
90. "Systematic Analysis of Thermal Turbojet Propulsion", 1947
Box 4 Folder 8
92. "Blade Systems of Circular Arrangement in Steady, Compressible Flow", 1948
Box 4 Folder 9
Unnumbered. "Vibrations of a Helicopter Rotor-Fuselage System Induced by the Main Rotor Blades in Flight", 1954

Unpublished

Box 4 Folder 10
Belastung des Turmes
Box 4 Folder 11
Bericht Reissner: uber II Internat. Kongress fur Tech. Mechanik -- Zurich, 12-17 September, 1926
Box 4 Folder 12
Clairautsches Problem
Oversize MC-035-05
Erlauterungsbericht zu dem Entwurf Eines Luftschiffes - System Sr. Excellenz, des Grafen von Zeppelin, 1903

Analytical report, computations and mechanical drawings for an airship.

Box 4 Folder 14
Formanderung, Spannung und Kleine Schwingugen von Rotierenden Staben, Insbesondere Luftschraubenflugen mit...

Abhandlung 2.

Box 4 Folder 15
Hauptpunkte des Referats u. der Discussion des Technischen Pubs
Box 4 Folder 16
Lubrication Flow of Periodic Distribution Between Prescribed Boundaries
Box 4 Folder 17
Praktische Schraubenberechnung, 1917
Box 4 Folder 18
Propeller Design, 1941
Oversize MC-035-06
Propellertheorie, 1933 - 1935

Includes graphs.

Box 4 Folder 20
Satz: Masse und Gewicht des Ausschusses fur Einheiten und Formelgrossen, 1931
Box 4 Folder 21
SPEE Report, 1939

Engineering Education and Teaching on Vibration (and Oscillation) Phenomena in Undergraduate Courses.

Box 4 Folder 22
Tech. Eindrucke vom [?] Kriegschaupl
Box 4 Folder 23
Theoretischen Untersuchungen von Schrauben
Box 4 Folder 24
Theory of Dynamic Balancing of Propellers, 1943
Box 4 Folder 25
Uber den Festikeitsnachweis des Albatros-[?]..., 1914
Box 4 Folder 26
Viscous Flow of Periodic Distribution in Narrow Channels
Box 4 Folder 27
Unidentified titles (2)

Notebooks

Box 4 Folder 28
Berichts, 1917
Box 5 Folder 1
Protokollbuch 1, 1907
Box 5 Folder 2
Protokollbuch 1a (Reinschrift von Prot.buch.1), 1907
Box 5 Folder 3
Untersuchung der Stabilitat von Aeroplanen. Heft 2

WRITINGS OF OTHERS

Box 5 Folder 4
Bandholz, J. H. "Amerikanische Eisenbauwerkstatten", 1907
Box 5 Folder 5
Bartsch von Sigsfeld. "Anlagen zur Eingabe des Grafen von Zeppelin"
Box 5 Folder 6
Gehlen, K. "Querstabilitat und Seitensteuerung von Flugmaschinen", 1913

Referent: Professor Dr. Ing. H. Reissner.

Box 5 Folder 7
Helmbold, H.B. "Die Grenze des Luftschraubendurchmessers"

Includes mechanical drawings.

Box 5 Folder 8
Kober, T. "Lenkbares Luftschiff nach den Ungaben Seiner Excellenz General Graf von Zeppelin", 1894

Includes mechanical drawing and notes.

Box 5 Folder 9
Kubler, Hugo. "Das Zeppelin'sche Luftfahrzeug", 1901
Box 5 Folder 10
REISSNER ANNIVERSARY VOLUME, 1949 -- Reviews
Box 5 Folder 11
Reviews of Hans Reissner's publications by various authors
Box 5 Folder 12
Schwerin, E. "Uber Spannungen in Symmetrisch und Unsymmetrisch Belasteten Kugelschalen (Kuppeln)...", 1918

Referent: Professor Dr.-Ing. Reissner.

Box 5 Folder 13
Thalau, K. "Bericht der Deutschen Versuchsanstalt fur Luftfahrt E.V., Berlin-Adlershof ", 1925

Includes Bericht by C. Jansen.

Box 5 Folder 14
Zeppelin, Ferdinand. "Notruf zur Rettung der Flugschiffahrt", 1903
Box 5 Folder 15
Zeppelin, Ferdinand. "Schriftstucke und Bemerkungen zur Klarlegung des Wahren Wertes Meiner Flugschiffe", 1902

LECTURES AND TEACHING MATERIAL

Box 5 Folder 16
Aerodynamic Problems in Airscrew Design -- Lecture Given at M.I.T., 1937

October 1937.

Box 5 Folder 17
Aeronautical Aerodynamics
Box 5 Folder 18
Aviation Technology of Two Wars, 1943
Box 5 Folder 19
Dynamics 0691. Fall 1951-52 - Chapter 1. Kinematics (Geometry of Motion)
Box 6 Folder 1
Notes on Cartesian Tensors
Box 6 Folder 2
Theory of Elasticity - Polytechnic Institute of Brooklyn, Graduate Division -- Fall Term, 1948 - 1949

Given by H.J. Reissner and V.L. Salerno.

PATENTS

Box 6 Folder 3
1919, January 11: "Stellspindelantrieb fur Verstellbare Propeller"
Box 6 Folder 4
1933, August 13: "Verstellpropeller mit Ableitung der Verstellbewegung von der Propellerwelle aus Gegenuber"
Box 6 Folder 5
1938(?), December 31: "Fliehkraftregler, Insbesondere fur Verstellbare Luftschrauben"
Box 6 Folder 6
1941, August 5: "Regulatable Propeller Having Adjustable Blades"
Box 6 Folder 7
1943, August 10: "Controls for Variable Pitch Propellers"
Box 6 Folder 8
1943, December 7: "Screw Propeller, Particularly for Aircraft"
Box 6 Folder 9
1944, March 14: "Aircraft Propeller Construction"
Box 6 Folder 10
1944, May 8: "Propeller Construction for Aircraft or the Like"
Box 6 Folder 11
1944, December 12: "Propeller Construction for Aircraft or the Like"
Box 6 Folder 12
1944, December 19: "Screw Propellers, Particularly for Aircraft"
Box 6 Folder 13
1945, January 2: "Screw Propellers, Particularly for Aircraft"
Box 6 Folder 14
1945, February 24: "Propulsion Device, Particularly for Aircraft"
Box 6 Folder 15
1946, July 9: "Propeller Construction for Aircraft or the Like"
Box 6 Folder 16
Patent documentation and notes

SUBJECT FILES

Oversize MC-035-04
Aerial Bombing Ballistics Charts - L. Lichtenstein and Hans Reissner, 1915
Oversize MC-035-02
Aircraft - Mechanical drawings
Oversize MC-035-01
Bridges - Mechanical drawings
Box 6 Folder 20
Propeller manufacture - Helix Propeller-Gesellschaft m.b.H., 1919 - 1920
Box 6 Folder 21
Propeller manufacture - Miscellaneous brochures
Box 6 Folder 22
Propellers - Scrapbook of photographs
Box 6 Folder 23
Technische Hochschule

ORIGINALS OF PRESERVATION PHOTOCOPIES

Box 6 Folder 24
Originals of Preservation Photocopies