MU stacked logo in yellow and black -- links to main university of missouri at columbia web site MU Libraries -- links to home page of the University Libraries of the University of Missouri at Columbia University Archives -- links to home page of the University Archives of the University of Missouri at Columbia MU stacked logo in yellow and black -- links to main university of missouri at columbia web site University Archives -- links to home page of the University Archives of the University of Missouri at Columbia University of Missouri -- links to home page of the University of Missouri at Columbia spacerHeader graphic

Search

Hours & Contacts

Policies & Procedures

Holdings:
* UM-System
* Columbia

Topical Guides

Online Exhibits

Links
* Archival
* General

MU Libraries

Call Number:
(C:9/9/1)

Box 1-127203
Box 2-127210
OSP 1-B23, 9, 4

Record Group: 9 C
Record Sub-Group: 22
Records Title: UMC; College of Engineering; Department of Electrical and Computer Engineering; Mendell P. Weinbach Collection; Professional Papers and Manuscripts
Dates: 1919-1948, bulk 1928-1946
Volume: 2 cubic feet, 2.5 linear feet

Scope and Content Note:

(A04-09; A07-19; A08-09; A13-53)
This Record Sub-Group contains the professional and business correspondence of Professor Mendell Penco Weinbach of the Department and later College of Engineering. Included in the collection are materials related to the development, marketing, and legal protection of the royalties and patent rights of Professor Weinbach's Log Log Vector™ Slide Rule. Professor Weinbach was also the author of several widely used electrical engineering textbooks of the second quarter of the twentieth-century. The collection contains not only the drafts of some of his minor published works and draft copies of some of the works that he was working on at the time of his sudden death in 1947, but also correspondence with his publishing companies, Macmillan and Keuffel & Esser.

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).

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:

  1. Series One - Slide Rule Correspondence
  2. Series Two - Slide Rule Legal Papers
  3. Series Three - Publication Correspondence
  4. Series Four - Unpublished Book Drafts
    1. Sub-Series One - Fundamentals of Electrical Engineering
    2. Sub-Series Two - Electrical Machinery
  5. Series Five - Pre-Service Training Course for Aircraft Radio Operators
  6. Series Six - General Materials

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
Box 1

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
Box 1 (cont'd)

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
Box 1 (cont'd)

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
Sub-Series One - Fundamentals of Electrical Engineering
Box 1 (cont'd)

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)
Sub-Series One - Electrical Machinery
Box 1 (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)
Sub-Series Two - Electrical Machinery (cont'd)
Box 2

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
Box 2 (cont'd)

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
Box 2 (cont'd)

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

Search our Holdings

MU Homepage Archives Homepage Top of the Page Send us E-Mail

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

An equal opportunity/access/affirmative action/pro-disabled and veteran employer.
DMCA and other copyright information.