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The Gallery of Technological wonders Automatic dial telegraph In 1847 Werner Siemens developed an automatic dial telegraph. This was of fundamentally improved design, no longer working in the manner of a clock but making use of a Wagner-Neef hammer to maintain an electrically controlled synchronism between transmitter and receiver. Halske's enthusiasm for the dial telegraph led them to form a partnership in 1847, thus producing a "primordial cell" of the present Siemens AG: the Siemens & Halske Telegraph Construction Company, with headquarters in Schoneberger Strasse in Berlin.   Siemens S.p.A. 1999 - Milano Communication and Marketing Reproduction and use of the images and texts are prohibited.