The Finding Aid of the Loyd C. Sigmon Papers 0063

Finding aid prepared by Jamie Henricks, Katie Richardson, and Lindsey Gant
The processing of this collection and the creation of this finding aid was funded by the generous support of the National Historical Publications and Records Commission.
Pepperdine University. Special Collections and University Archives.
24255 Pacific Coast Highway
Malibu, CA, 90263-4786
(310) 506-4434
specialcollections@pepperdine.edu
February 2013


Title: Loyd C. Sigmon papers
Identifier/Call Number: 0063
Contributing Institution: Pepperdine University. Special Collections and University Archives.
Language of Material: English
Physical Description: 1.69 linear feet (2 boxes)
Date (inclusive): 1945-2008
Abstract: The collection contains materials created by or about Loyd C. Sigmon from 1945 to 2008. Items relate to his interest in radio broadcasting, the creation of SigAlert (a traffic and emergency alert system), and his inventions. Books, plaques, articles, newspaper clippings, biographical materials, blueprints, and notebooks, are found within the collection.
Creator: Sigmon, Loyd C., 1909-2004

Conditions Governing Access

Advance notice required for access.

Conditions Governing Use

Permission to publish, quote, or reproduce must be secured from the repository and the copyright holder.

Preferred Citation

[Box/folder# or item name], Loyd C. Sigmon papers, Collection no. 0063, Special Collections and University Archives, University Libraries, Pepperdine University.

Immediate Source of Acquisition

Materials were transferred from University Advancement to the University Archives on March 16, 2010.

Biographical note

Loyd C. Sigmon was born in Stigler, Oklahoma on May 6, 1909 to a cattle-ranching family. He went to school at Wentworth Military Academy and Massachusetts Institute of Technology. He was interested in radio as a young man, and earned his his amateur radio license (W6LQ) at age 14. His broadcasting career began in 1932 at the Boston Short Wave and Television Laboratories. In 1941, he was hired as an engineer for MacMillan Petroleum Company's flagship radio station, KMPC, in Los Angeles, California.
During World War II, he served in the United States Army Signal Corps as Officer in charge of Communications for the Supreme Allied Command in Europe. He came up with the idea for the SigCircus, a mobile radio broadcasting unit on a fleet of 17 trucks which was able to send and receive messages simultaneously from Europe and the United States.
Sigmon resumed his job in Los Angeles after the war, and eventually became Executive Vice President at Gene Autry's Golden West Broadcasters. The company owned eight radio and two television stations on the west coast, including KMPC.
In 1955, Sigmon invented a specialized radio and tape recorder that the Los Angeles Police Department used to alert radio stations throughout the city to traffic conditions and emergencies. The messages were referred to as "Sigmon traffic alerts," a phrase quickly shortened to "SigAlert." While originally intended for any emergency or traffic situation, the system is now mainly used for traffic alerts.
Loyd Sigmon received recognition and honors from local and state government agencies, the National Safety Council, and broadcasting and radio organizations. He was a member of the University Board at Pepperdine University, and an office in the Center for Communication and Business is named after him. Sigmon died in Bartlesville, Oklahoma, on June 2, 2004.

Scope and Content

The collection contains materials created by or about Loyd C. Sigmon from 1945 to 2008. Items relate to his interest in radio broadcasting, the creation of SigAlert (a traffic and emergency alert system), and his inventions. Items include engineering books and books on Los Angeles traffic; plaques celebrating Sigmon; articles and newspaper clippings about Sigmon and/or SigAlert; biographical material; a radio station photo album; blueprints for electronic gates, home improvements, a police receiver, a Mark IV radio receiver, and circuits; and a blueprint map of trans-Atlantic cables, radio and circuits passing between Europe, England, the United States, and Iceland from 1945.

Related Archival Materials

Files related to the University Board can be found in the M. Norvel and Helen Young papers 0014, the Howard A. White papers 0010, and the William S. Banowsky papers 0002. Items are restricted for 50 years after their creation date.

Processing Information note

The collection was arranged and described by Jamie Henricks, Katie Richardson, and Lindsey Gant in February, 2013.

Subjects and Indexing Terms

KMPC (Radio station : Los Angeles, Calif.).
SigAlert.
Sigmon, Loyd C., 1909-2004
Articles
Clippings
Correspondence
Los Angeles (Calif.)--History
Periodicals
Plaques
Receipts (financial records)

Box 1

Biographical Materials 1949-1997

Box 1

Blueprints- Electrical Components (receivers, etc.) and Drawings 1945-1955

Box 1

Construction and Renovation of Sigmon Home- Bills 1975

Box 1

Construction and Renovation of Sigmon Home- Blueprints 1949-1997

Box 1

Correspondence and Club Memberships 1965-1997

Box 2

Framed photocopy of a check to Paramount Television Productions, Inc. for $11,642,533.33 and a photocopy of deposit slip for Goldenwest Broadcast for $357,666.67 1964 May 19

Box 1

Miscellaneous notes, invoices, papers 1970s-2008

Box 1

Newspaper Clippings and Articles about Sigmon 1996-1997

Box 2

Plaque- Lyod Sigmon Lifetime Member California Highway Patrol 1992 December 21

Box 1

Publications- Amateur Radio Station Log 1980 July

Box 1

Publications- Electronics for Engineers:Reference Articles, Charts, and Graphs from Electronics Magazine edited by John Markus and Vin Zeluff 1945

Box 1

Publications- Engineers Notebook II: A Handbook of Integrated Circuit Applications by Forrest M. Mims, II 1982

Box 1

Publications- Kathy Gronau, "L.A.'s Patron Saint of Traffic," Los Angeles Radio Guide vol. 1, no. 7 1995

Box 1

Publications- KMPC Photo Album undated

Box 1

Publications- Lyod C. Sigmon, "SigCircus," Milwaukee School of Engineering Bulletin vol. 1, no. 12 1949 December

Box 1

Publications- Rob O'Neil, "Sigmon Put L.A. Drivers on the Alert," Los Angeles Times 1997 August 16

Box 1

Publications- "Sigalert," Traffic Safety: A National Safety Council Publication 1959 February

Box 1

Publications- Take an Alternate Route by Paul 'Panther' Pierce 1968

Box 1

Publications- "The Story of the Sigalert" 1965 September 5

Box 1

Publications- "The Voice of Emergency" by Ted Krec 1956

Box 1

Radio Circuit Diagram- Transatlantic Radio and Circuits Cable 1945