Eldo C. Koenig Papers, 1943-1960. Finding Aid.

Summary Information

Title: Eldo C. Koenig papers
Dates: 1943-1960
Creator: Koenig, Eldo C. (Eldo Clyde), 1919-
Extent: 1 box (0.4 cubic feet)
Language: English
Collection Number: CBI 53
Abstract:

Collection contains records relating to the design, construction, and operation of an analog computer at the Allis-Chalmers Manufacturing Company including notes, sketches, diagrams, articles, a photograph of the computer, and case studies using the computer.

Repository: University of Minnesota Libraries. Charles Babbage Institute.

Access and Use

Acquisition Information:

The records were given to the Charles Babbage Institute by Eldo C. Koenig in 1989.

Access Restrictions:

Access to the collection is unrestricted.

Copyright:

CBI holds the copyright to all materials in the collection, except for items covered by a prior copyright (such as published materials). Researchers may quote from the collection under the fair use provisions of the copyright law (Title 17, U.S. Code).

Preferred Citation:

Eldo C. Koenig Papers (CBI 53), Charles Babbage Institute, University of Minnesota, Minneapolis.

Arrangement

The materials in this collection are arranged into the following groups:

• Fundamentals of Design and Programming, 1950-1960
• Design and Construction, 1943-1952
• Case Studies, 1948-1952
• Ephemera, 1950-1960

Biographical Note

After receiving his BS in Electrical engineering from Washington University in 1943, Eldo C. Koenig began at Allis-Chalmers Manufacturing Company as a test engineer. He completed his MS at the Illinois Institute of Technology in 1949 and received his PhD from the University of Wisconsin in 1956. Koenig held various positions at Allis-Chalmers including supervisor of the computer laboratory. In 1962, he left Allis-Chalmers to take a teaching position with the University of Wisconsin. Koenig was active in several professional organizations including the Association for Computing Machinery and the Institute of Electrical and Electronics Engineers.

• "Koenig, Eldo C." In American Men & Women of Science, 17th ed., vol. 4, p. 421.

Collection Scope and Content Note

The collection contains records related to Eldo Koenig's development of an analog computer for the Allis-Chalmers Manufacturing Company of West Allis, Wisconsin, to aid in engineering studies. The collection documents the design and construction process for the computer, and a photograph of the computer. In addition, the collection contains case studies done with the via computer, a photocopy of Koenig's Alfred Nobel Prize, and citations to Koenig's articles on the development of the computer.

Subject Terms

Index Terms

• This collection is indexed under the following headings in the catalog of the University of Minnesota Libraries. Researchers desiring materials about related topics, persons, or places should search the catalog using these headings.
• Koenig, Eldo C. (Eldo Clyde), 1919-
• Allis-Chalmers Manufacturing Company.
• Computer engineering.
• Analog computers--Research.

Box and Folder List

Location		Title
		Fundamentals of Design and Programming, 1950-1960
Box 1		Fundamentals of design and programming of the computer, 1950-1960. Box 1, Folder 1
		Design and Construction, 1943-1952
Box 1		Investigations for a basic nonlinear element, undated. Box 1, Folder 2
		Photo cell characteristic curves-RCA Type 922, 1943-1952. Box 1, Folder 3
		Photo cell characteristic curves--RCA Type 926, 1947-1949. Box 1, Folder 4
		Power supply and general design, 1946-1947. Box 1, Folder 5
		Case Studies, 1948-1952
Box 1		Computer analysis for the design of the first supercharged hydrogen cooled generator, 1949-1950. Box 1, Folder 10
		Fluid flow studies, 1949-1950. Box 1, Folder 11
		Magnetic saturation studies on cylindrical rotor electric generators, 1950. Box 1, Folder 9
		Magnetic saturation studies of a salient pole synchronous machine, 1948-1952. Box 1, Folder 6
		Pole circuit magnetic saturation characteristics, circa 1950. Box 1, Folder 7
		Stator circuit characteristics, 1950. Box 1, Folder 8
		Ephemera, 1950-1960
Box 1		Alfred Nobel Prize and article citations, 1951-1960.  Box 1, Folder 13
		Computer photograph, 1950. Box 1, Folder 12