Telelog (telegraph)
Telelog refers to a simple electric telegraph that became known in 1877 as "Ackermann's Telelog".
The telegraph technician W. Fein in Stuttgart manufactured the device according to the information provided by Lieutenant H. Ackermann of the Badischer Fußartillerie-Regiment No. 14 , a regiment of the XIV Army Corps (German Empire) . The purpose of this telegraph was the fire control and communication of distant foot artillery and the advanced observers , who should give the gun batteries the necessary information for faster establishment and effective bombardment of the targets.
Pointer telegraphs were known as early as 1839 . The Pantelegraph enabled the transmission of image information since 1855. Innocenzo Manzetti realized the first voice transmission in 1844 and Alexander Graham Bell had received his patent for the telephone as a telephone set in 1876 . The Telelog consisted of the main units “intercom, cable and galvanic battery”. The designation speech device is misleading, however, because from the detailed description it is clear that it was a contactor that had the same function as a Morse code key . An electric bell served as the receiver as a "bell" . Agreed signals were used to transmit the information and noted by the posts. The galvanic battery consisted of 20 elements in a box with appropriate compartments. The compartments each contained a copper bowl on the bottom, which was filled with copper vitriol . The opposite pole was formed by zinc cylinders that were screwed to the wooden cover . A 25 percent Epsom salt solution served as the filling .
Individual evidence
- ^ A b Johann Gottfried Dingler, Dinglers polytechnisches journal , JG Cotta, 1878, volume 227, page 311 ff.
- ↑ Monthly Issues for Politics and Wehrmacht , (also organ of the Society for Heereskunde), Volume 23, 1877, page 114 ff.
Web links
- Information on the Baden foot artillery regiment No. 14