please help improve it or discuss these issues on the talk page . learn how and when to remove these template messages this article is an orphan as no other articles link to it . please introduce links to this page from related articles ; try the find link tool for suggestions . february 2009 this article needs additional citations for verification . please help improve this article by adding citations to reliable sources . unsourced material may be challenged and removed . october 2007 learn how and when to remove this template message learn how and when to remove this template message struthers dunn llc type private industry industrial controls founded 1923 headquarters timmonsville sc key people eric steinback ceo david moore president products industrial relays & controls number of employees 45 website http www.struthers dunn.com struthers dunn llc formally known as struthers dunn or dunco is a manufacturer of industrial controls since 1923 . struthers dunn was founded by john struthers dunn in 1923 outside philadelphia pennsylvania . they were one of the earliest relay manufacturers in the united states and became the first manufacturer of military relays for us government during world war ii . their first military product the 101 series contactor was a 100a rated spst switch for use on naval ships in 1938 . subsequent development led to the beginning of the qpl qualified product list of products for the us military commonly known as mil spec products today . on the commercial products side their other notable design was the 219 series of industrial relays . originally designed as a socket compatible high reliability relay for use in nuclear energy facilities it is still used today for critical controls . the 219 packaged family of products and the 219ne nuclear energy family encompassed in addition to the standard electro mechanical versions the 236 237 238 family of industrial time delay relays the later 246 247 248 family of advanced time delay relays the 255 series of latching relays the 311 series of sequence stepper relays the 349 series voltage sensors and the rsx series of custom packages controls . company history edit 1923 company is founded by john struthers dunn in philadelphia pa . 1 1926 john struthers dunn submit and is awarded a patent for his spdt self adjusting relay the first use of many standard features still used in the design of electro mechanical relays today . 2 1938 introduces the first relay approved for us military applications the 101 series used on naval vessels . 1946 charles packard chief engineer and struthers dunn publish relay engineering one of the earliest relay textbooks written . 3 1947 becomes a founding members of narm the national association of relay manufacturers . 4 1954 company moves to new headquarters in pitman nj . 1958 introduces the 219 and 219ne series approved for use by the aec atomic energy commission in nuclear power plants . 1986 nytronics corporation purchases struthers dunn and moves company to new facility in darlington sc . 1990 magnecraft electric company chicago il purchases the struthers dunn commercial product lines from the nytronics corporation . the two companies are reorganized as msd inc magnecraft & struthers dunn with headquarters in chicago and primary operations in darlington sc . 1995 msd inc purchases the military product line mil spec qpl products from the nytronics corporation . 2003 msd sells the military product line to tyco electronics for an exchange of cash and commercial relay product lines . 2005 msd sells the magnecraft commercial product lines to schneider electric . 5 the struthers dunn commercial products are sold to eric steinback former director of sales of msd . company is reformed as struthers dunn llc a premier supplier of custom built industrial controls . struthers dunn is one of a few privately owned relay companies left in the united states . references edit struthers dunn s official history page . retrieved 2007 08 21 . 1926 relay patent awarded to struthers dunn . retrieved 2007 08 21 . relay engineering a reference book by charles packard . published by struthers dunn inc 1945 . retrieved 2007 08 21 . history of risa and narm . retrieved 2007 08 21 . press release schneider electric acquires magnecraft product range . retrieved 2007 08 21 . external links edit struthers dunn website nrc website retrieved from https en.wikipedia.org w index.php title struthers dunn & oldid 721776511 categories electronics companies of the united stateshidden categories orphaned articles from february 2009all orphaned articlesarticles needing additional references from october 2007all articles needing additional references navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout 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