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Record Group: 9 C Scope and Content Note: (A04-09; A07-19; A08-09; A13-53) Biographical Note: Mendell Penco Weinbach was born on 2 November 1881 in Romania. He studied at the Romanian Lyceum before immigrating to the United States in 1901 at the age of 20. He received A.B. (1905), B.S. (1907) and A.M. (1907) degrees from the University of Missouri specializing in mathematics and engineering. Weinbach taught physics at the University High School while pursuing his education in engineering and joined the faculty of the Department of Engineering as an instructor in electrical engineering in 1907 and eventually became a full professor in 1923. He was chairman of the Department of Electrical Engineering in the College of Engineering for the last twenty years of his life. In the late 1920s Weinbach worked for AT&T in New York and Kansas City Power and Light during the Summers. Weinbach and his wife Regina Paves Weinbach (d. 1945) raised five children in Columbia, MO. Professor Weinbach invented a number of devises and held several patents. His most successful invention was the Log Log Vector™ Slide Rule that made mathematical computations easier for electrical engineers. The slide rule was a great success but it was also the focus of a long legal dispute with the company which marketed it, Keuffel & Esser Co (K&E), over royalties and breach of contract. Weinbach also wrote a number of well received textbooks for electrical engineering students and was engaged in several publishing projects when he unexpectedly died after a short illness on 29 March 1947. He authored Principles of Transmission in Telephony in 1924, Alternating Current Circuits in 1933, and was in the final stages of completing Electric Power Transmission in 1947 when he died. The final editing for Electric Power Transmission was completed by his daughter, Miss Edith Weinbach. At the time of his death Professor Weinbach was working on two major textbooks that were never finished or published, Elements of Electrical Engineering and Electrical Machinery and exist only in draft form. In 1941, immediately prior to the American entry into the second world war, Professor Weinbach wrote a history of the first 90 years of engineering at the University of Missouri-Columbia, Engineering at the University of Missouri: 1850-1940. During WWII, Weinbach authored instructional materials and taught courses to students at the University of Missouri who were studying to be aircraft radio operators in the US Army Air Corps. Provenance Note: This collection of papers created by M.P. Weinbach was kept after his death by his daughters, Edith Weinbach and Charlotte Weinbach Kershenbaum. Professor Weinbach's grandson, Richard Kershenbaum, donated the papers to the University of Missouri-Columbia Archives in March of 2004. The heirs of Professor Weinbach earlier donated the large prototypes of the Log Log Vector™ Slide Rule to the College of Engineering for their museum. In 2013, the prototype slide rule display was transferred to University Archives. Bibliographical Note: Weinbach, M.P., Principles of Transmission in Telephony, (New York: Macmillan, 1924). Weinbach, M.P., "Vector Calculating Devices," in The Proceedings of the Regional Meeting of the American Institute of Electrical Engineering, (St Louis, March 7-9, 1928).Weinbach, M.P. and A.F. Puchstein., The Log Log Vector Slide Rule, (New York: Keuffel & Esser Co., 1930). [A copy of this publication can be found in C:9/9/4.] Weinbach, M.P., Alternating Current Circuits, (New York: Macmillan, 1933). Weinbach, Mendell P., Engineering at the University of Missouri: 1850-1940, (Columbia, MO: Engineering Foundation of the College of Engineering, 1941). [Electronic version available] Weinbach, M.P., Electrical Power Transmission, (New York: Macmillan, 1948). Note to Researcher: An article by William K. Robinson is available from a website (www.mccoys-kecatalogs.com) dedicated to Keuffel & Esser slide rules: Mendell Penco Weinbach and the K&E Log Log Vector Slide Rules. The article concerns itself with "Professor Mendell Penco Weinbach and his contributions to the development of the two K&E Log Log Vector Slide Rules. These were the Log Log Vector Slide Rule, K&E 4093, introduced in late 1929; and the Log Log Duplex Vector Slide Rule, K&E 4083, following ten years later in 1939" [Page 1].Series Descriptions: This Record Sub-Group is divided into six record series. Series One contains correspondence that relates to the development, marketing and litigation surrounding the Log Log Vector™ Slide Rule arranged chronologically. Series Two consists of legal papers that relate to Professor Weinbach's suit against the Keuffel & Esser Company about slide rule royalties and breach of contract arranged topically. Series Three is made up of correspondence related to Professor Weinbach's publication projects primarily with the Macmillan Company arranged chronologically. Series Four consists of two sub-series each arranged in chapter number and draft number order. Series Four, Sub-series One contains draft versions of the unpublished textbook, Fundamentals of Electrical Engineering and Sub-series Two consists of drafts of Electrical Machinery. Series Five consists of instructional material created by Weinbach for the Engineering Science Management War Training (ESMWT) Pre-Service Training Course for Aircraft Radio Operators in 1943, arrangement is by instructional term. Series Six consists of assorted general materials belonging to Professor Weinbach such as a photograph of telephone switching equipment, an academic personnel form from 1937, a presentation given by Weinbach and assorted and undated correspondence and notes. Series Outline:
Note to Researcher: For additional information concerning the history of the MU College of Engineering, see M.P. Weinbach's Engineering at the University of Missouri: 1850-1940. Inventory Series One - Slide Rule Correspondence FF 1 - Slide Rule Correspondence, 1919 FF 2 - Slide Rule Correspondence, 1922 FF 3 - Slide Rule Correspondence, 1928 FF 4 - Slide Rule Correspondence, 1929 FF 5 - Slide Rule Correspondence, 1930 FF 6 - Slide Rule Correspondence, 1931 FF 7 - Slide Rule Correspondence, 1932 FF 8 - Slide Rule Correspondence, 1933 FF 9 - Slide Rule Correspondence, 1934 FF 10 - Slide Rule Correspondence, 1937 FF 11 - Slide Rule Correspondence, 1938 FF 12 - Slide Rule Correspondence, 1939 FF 13 - Slide Rule Correspondence, 1944 FF 14 - Slide Rule Correspondence, 1946 FF 15 - Slide Rule Correspondence, n.d. Series Two - Slide Rule Legal Papers FF 16 - General Articles About Slide Rules (includes circular slide rule), 1922-1928 FF 17 - Weinbach's Instructions for Log Log Vector™ Slide Rule, 1928 FF 18 - Copies of Slide Rule Patents, 1937 FF 19 - Weinbach and Puchstein vs. K&E Co., Defendant's Exhibits #4-7, 1945 FF 20 - Weinbach and Puchstein vs. K&E Co., Defendant's Exhibits #23, 25-29, 1945 FF 21 - Weinbach and Puchstein vs. K&E Co., Defendant's Exhibits #35, 38, 40, 43, 46A-50, 1945 FF 22 - Weinbach and Puchstein vs. K&E Co., Defendant's Exhibits #51-63, 1945 FF 23 - Weinbach and Puchstein vs. K&E Co., Defendant's Exhibits #102-113, 115, 1945 FF 24 - Weinbach and Puchstein vs. K&E Co., Defendant's Exhibits #116-130, 132-135, 1945 FF 25 - Weinbach and Puchstein vs. K&E Co., M.P. Weinbach Deposition, 1945 FF 26 - Drafts of The Story of the K&E Vector and Deciting Slide Rules by M.P. Weinbach, 1945 FF 26A - Weinbach and Puchstein vs. K&E Co., Compiled Note Book, 1944-1945 FF 26B - Weinbach and Puchstein vs. K&E Co., Compiled Note Book, 1944-1945 [Preservation Copy of FF 26A on acid-free paper] Series Three - Publication Correspondence FF 27 - Publication Correspondence, 1922 FF 28 - Publication Correspondence, 1924 FF 29 - Publication Correspondence, 1925 FF 30 - Publication Correspondence, 1926 FF 31 - Publication Correspondence, 1930 FF 32 - Publication Correspondence, 1931 FF 33 - Publication Correspondence, 1932 FF 34 - Publication Correspondence, 1933 FF 35 - Publication Correspondence, 1934 FF 36 - Publication Correspondence, 1935 FF 37 - Publication Correspondence, 1936 FF 38 - Publication Correspondence, 1942 FF 39 - Publication Correspondence, 1943 FF 40 - Publication Correspondence, 1944 FF 41 - Publication Correspondence, 1945 FF 42 - Publication Correspondence, 1946 FF 43 - Publication Correspondence, 1947 Series Four - Unpublished Book Drafts FF 44 - Fundamentals of Electrical Engineering: First Draft, Chapter 1, ca. 1945 FF 45 - Fundamentals of Electrical Engineering: First Draft, Chapter 2, ca. 1945 p> FF 46 - Fundamentals of Electrical Engineering: First Draft, Chapter 4, ca. 1945 p> FF 47 - Fundamentals of Electrical Engineering: First Draft, Chapter 5, ca. 1945 FF 48 - Fundamentals of Electrical Engineering: First Draft, Chapter 6, ca. 1945 FF 49 - Fundamentals of Electrical Engineering: First Draft, Chapter 7, ca. 1945 FF 50 - Fundamentals of Electrical Engineering: Second Draft, Chapter 1, ca. 1945 FF 51 - Fundamentals of Electrical Engineering: Second Draft, Chapter 2, ca. 1945 FF 52 - Fundamentals of Electrical Engineering: Second Draft, Chapter 3, ca. 1945 FF 53 - Fundamentals of Electrical Engineering: Second Draft, Chapter 4, ca. 1945 FF 54 - Fundamentals of Electrical Engineering: Second Draft, Chapter 5, ca. 1945 FF 55 - Fundamentals of Electrical Engineering: Third Draft, Chapter 5, ca. 1945 Series Four - Unpublished Book Drafts (cont'd) FF 56 - Electrical Machinery: First Draft, Chapter 1, ca. 1945 FF 57 - Electrical Machinery: First Draft, Chapter 2, ca. 1945 FF 58 - Electrical Machinery: First Draft, Chapter 3, ca. 1945 FF 59 - Electrical Machinery: First Draft, Chapter 4, ca. 1945 FF 60 - Electrical Machinery: First Draft, Chapter 5, ca. 1945 FF 61 - Electrical Machinery: First Draft, Chapter 6, ca. 1945 FF 62 - Electrical Machinery: First Draft, Chapter 7, ca. 1945 FF 63 - Electrical Machinery: First Draft, Chapter 8, ca. 1945 FF 64 - Electrical Machinery: First Draft, Chapter 9, ca. 1945 FF 65 - Electrical Machinery: First Draft, Chapter 10, ca. 1945 FF 66 - Electrical Machinery: First Draft, Chapter 11, ca. 1945 FF 67 - Electrical Machinery: First Draft, Chapter 12, ca. 1945 FF 68 - Electrical Machinery: First Draft, Chapter 13, ca. 1945 FF 69 - Electrical Machinery: First Draft, Chapter 14, ca. 1945 Series Four - Unpublished Book Drafts (cont'd) FF 1 - Electrical Machinery: Second Draft, Chapter 1, ca. 1945 FF 2 - Electrical Machinery: Second Draft, Chapter 2, ca. 1945 FF 3 - Electrical Machinery: Second Draft, Chapter 3, ca. 1945 FF 4 - Electrical Machinery: Second Draft, Chapter 4, ca. 1945 FF 5 - Electrical Machinery: Second Draft, Chapter 5, ca. 1945 FF 6 - Electrical Machinery: Second Draft, Chapter 6, ca. 1945 FF 7 - Electrical Machinery: Second Draft, Chapter 7, ca. 1945 FF 8 - Electrical Machinery: Second Draft, Chapter 8, ca. 1945 FF 9 - Electrical Machinery: Second Draft, Chapter 9, ca. 1945 FF 10 - Electrical Machinery: Second Draft, Chapter 10, ca. 1945 FF 11 - Electrical Machinery: Second Draft, Chapter 11, ca. 1945 FF 12 - Electrical Machinery: Second Draft, Chapter 12, ca. 1945 FF 13 - Electrical Machinery: Second Draft, Chapter 13, ca. 1945 FF 14 - Electrical Machinery: Second Draft, Chapter 14, ca. 1945 FF 15 - Electrical Machinery: Second Draft, References, ca. 1945 FF 15A - Electrical Machinery: Extra and Unused Figures and Illustrations, n.d. Series 5 - ESMWT Pre-service Training Course for Aircraft Radio Operators FF 16 - Term I, Principles of Electricity: Summary 1-10 and 12-14, ca. 1943 FF 17 - Term II, Alternating Currents, Summary 1-10, ca. 1943 FF 18 - Term II, Electrical Laboratory EE: Experiment 1-7, ca. 1943 FF 19 - Term II, Electronics Laboratory: Experiment 1-24, ca. 1943 FF 20 - Term III, Electrical Machinery: Summary 1-5, ca. 1943 Series 6 - General Materials FF 21 - Jokes and Letters, n.d. FF 22 - M.P. Weinbach's MU Academic Information Form, 1937 FF 23 - Photograph of "artificial telephone line given to MU by Bell Labs," ca. 1925 FF 24 - Speech on the history of electricity, n.d. FF 25 - Miscellaneous Off-prints and Publications, 1913, 1935 FF 26 - Student Laboratory Notebook, 1907 FF 27 - University of Missouri Master's Degree Thesis by W.P. Weinbach: On the Behavior of Fuse Wires, 1907 FF 28 - American Institute of Electrical Engineers (AIEE) membership and honors, 1922-1931 FF 29 - Tau Beta Pi Initiation Banquet Programs, 1927-1933 FF 30 - MU Bulletin 1950 - describing the Mendell P. and Regina Paves Weinbach Memorial Prize in Electrical Engineering, p.22 FF 31 - Minutes of the Committee on University Policy, 1-11-1946 FF 32 - Tau Beta Pi Membership Certificate, 1907 [oversize] OSP 1 - Display case containing Weinbach's 22" Log Log Vector slide rule prototype and a 10" K&E slide rule, ca. 1900 - 1931 |
Copyright © Curators of the University of Missouri 1997-2004
Published by: University Archives muarchives.missouri.edu/
Originally Prepared by Michael Holland: October 2004
Revised: 28 February 2014
URL: https://muarchives.missouri.edu/c-rg9-s22.html
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