Måleinstrument med viser. 0 +- 60grader
Used to detect current in either direction in Telegraph circuits on receiving or sending stations. Also used as test equipment and known as a differential type. Made at the Telegraph Works Silvertown. Kilde: http://www.museumoftechnology.org.uk/expand.php?key=1213
Photo:
Nordlandsmuseet
Måleinstrument med viser. 0 +- 60grader
Used to detect current in either direction in Telegraph circuits on receiving or sending stations. Also used as test equipment and known as a differential type. Made at the Telegraph Works Silvertown. Kilde: http://www.museumoftechnology.org.uk/expand.php?key=1213
Photo:
Nordlandsmuseet
Måleinstrument med viser. 0 +- 60grader
Used to detect current in either direction in Telegraph circuits on receiving or sending stations. Also used as test equipment and known as a differential type. Made at the Telegraph Works Silvertown. Kilde: http://www.museumoftechnology.org.uk/expand.php?key=1213
Photo:
Nordlandsmuseet