issues . please help improve it or discuss these issues on the talk page . learn how and when to remove these template messages this article s tone or style may not reflect the encyclopedic tone used on wikipedia . see wikipedia s guide to writing better articles for suggestions . september 2008 learn how and when to remove this template message this article does not cite any sources . please help improve this article by adding citations to reliable sources . unsourced material may be challenged and removed . february 2010 learn how and when to remove this template message the topic of this article may not meet wikipedia s notability guidelines for companies and organizations . please help to establish notability by citing reliable secondary sources that are independent of the topic and provide significant coverage of it beyond its mere trivial mention . if notability can not be established the article is likely to be merged redirected or deleted . find sources american signal corporation news newspapers books scholar jstor free images september 2015 learn how and when to remove this template message learn how and when to remove this template message american signal corporation type public industry public safety founded 1942 headquarters milwaukee wisconsin u.s. key people richard d. roe vice president dale moeller president & ceo . website http www.americansignal.com american signal corporation is an outdoor warning siren company in america founded in 1942 . contents 1 history 2 early production siren models 3 sirens made after 1990 4 current mechanical sirens 5 current electronic sirens 6 references history edit the company began as biersach and niedermeyer co. in 1873 a milwaukee wisconsin based metal fabricating operation . after the 1941 attack on pearl harbor concerns surfaced that the american 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 2000 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 . in the late 1960s the company s name changed to alerting communicators of america aca and the production of new models began to suit the needs of individual municipalities . banshee screamer cyclone howler and allertor are just a few of the names under which these sirens were known . in the 1980s the company produced a line of sirens known as the penetrator series a more substantial variant of sirens the company had previously manufactured . in 1982 the company became the first in its industry to provide a wireless digital supervisory control and data acquisition scada system called compulert with over 6000 installations worldwide . over the decade the prominent advancements the company made in its siren s designs included battery operation high powered voice sirens and indoor alerting systems . similarly designed sirens were still manufactured but under new names such as the tempest series . as of 2010 update asc is still in operation and supplies many towns and cities in the u.s. with outdoor warning sirens most of which are now used to warn the public of threats such as tsunamis severe weather chemical spills and civil emergencies . early production siren models edit original siren from early production 1940 s 1950 s mobil directo biersach & niedermeyer brand sirens from the 1960s until the 1980s play media watch an allertor in alert and attack . aca allertor 125 aca hurricane 130 aca hurricane 130 mk ii aca screamer series . ranging from 2 hp to 10 hp aca banshee 110 aca banshee 115 aca sentry 95 aca cyclone 125 aca cyclone 120 this 40 hp . version lasted only a short while sirens in production during the 1980s until the early 1990s play media watch a penetrator in alert and attack . head shot of a p 50 the small tube is the air intake the fluting around the bottom of the chopper is the air exit a pole mounted aca p 50 is the colony tx aca cyclone a foreign 60 hp . version was built as well aca p 10 aca p 15 aca p 20 aca p 50 aca howler aca alertronic 6000 aca alertronic 4000 sirens made after 1990 edit after going bankrupt in 1992 and being sold to a new owner the company changed its name and the name of its sirens in production . sirens built from 1992 onward rm 127 rm 130 the rm 130 is the predecessor of the modern t 128 and uses the same horn system while maintaining appearance similar to the penetrator series t 135 same as the aca p 50 om 120 re 1600 current mechanical sirens edit tempest siren line is the current mechanical siren line . asc t 112 asc t 121 asc t 128 asc t 135 ac dc current electronic sirens edit these are the electronic speaker array sirens produced by the company . alertronic line al 1000 al 2000 al 4000 al 8000 others e class public address speaker array iforce quadrant modular array references edit retrieved from https en.wikipedia.org w index.php title american signal corporation & oldid 743561972 categories companies based in milwaukeemanufacturing companies based in wisconsinmanufacturing companies established in 1942american companies established in 1942sirenshidden categories wikipedia articles needing style editing from september 2008all articles needing style editingarticles lacking sources from february 2010all articles lacking sourcesarticles with topics of unclear notability from september 2015all articles with topics of unclear notabilitypages using infobox company with unsupported parametersarticles containing potentially dated statements from 2010all articles containing potentially dated statementsarticles containing video clips navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main 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