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Charles Adler, Jr. Collection, ca. 1920-1980

view Charles Adler, Jr. Collection, ca. 1920-1980 digital asset number 1
Author:
Adler, Charles Jr (engineer inventor) 1899-1980
Donor:
Ascher, Amalie Adler Mrs
Physical description:
6 cu. ft.: 14 document boxes, 1 flat oversize box
Type:
Photographs
Collection descriptions
Clippings
Patent applications
Correspondence
Receipts
Place:
Baltimore (Md.)
Date:
1920
1980
ca 1920-1980
20th century
1920-1980
Notes:
Adler, professional engineer and inventor, resided in Baltimore, Md., all his life. At 14 he patented an electric automotive brake. After attending Johns Hopkins University and serving briefly in the Army, he joined the Maryland and Pennsylvania Railroad, developing safety devices. In 1928 he developed the first sound-activated (by auto horn) traffic signal. Was granted over 60 U.S. patents (of which he donated 10 to the Government), was a licensed pilot and a member of numerous professional engineers' societies. Member, Maryland State Aviation Commission, 1953-1959; served on the Maryland Traffic Safety Commission from 1952 until his death.
Summary:
Contains much biographical information on Adler and his career. Newspaper clippings, photographs and other memorabilia detail his activities. Adler's published writings include articles in periodicals and newspapers. Numerous patent applications, related correspondence and royalty receipts relate to his inventions.
Cite as:
Charles Adler, Jr. Collection, ca. 1920-1980, Archives Center, National Museum of American History
Topic:
Inventions
Aeronautics and state
Railroads
Traffic engineering
Engineers
Traffic signs and signals
Inventors
Local number:
1990.3049 (NMAH Acc.)
Data Source:
Archives Center - NMAH
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