American Signal Corporation (ASC) is an outdoor warning siren and mass notification company in the United States. ASC was founded in 1873 as Biersach and Niedermeyer (B&N). After performing poorly, the company reformed as Alerting Communicators of America (ACA) in 1968, and expanded the line of warning systems they produced. In 1992, ACA went bankrupt and was bought and reformed as the American Signal Corporation. The company began as Biersach and Niedermeyer Co. in 1873 as a metal fabricating operation based in Milwaukee, Wisconsin. After the 1941 attack on Pearl Harbor, concerns surfaced that the public should be notified in the event of air attacks. The United States Department of the Army granted the company a contract to manufacture outdoor warning sirens, and in 1942, the company began production of over 2,000 sirens to be installed throughout the Pacific Theater for American troops and Air Bases. The need for these outdoor warnings increased during the following years as the Cold War brought a new threat of nuclear war. Three models were produced: the first two, the BN52 and BN54, were powered by a 25HP Wisconsin air-cooled engine. The later BN44E was instead powered by an electric motor. Most surviving BN54 models were later converted to use electric motors as the gasoline engines were not practical for normal use. More information...
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