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Ludwig Lehmann Hartvigson
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Publication of GB189823411ApublicationCriticalpatent/GB189823411A/en
23,411. Hartvigson, L. L. Nov. 7. Cables for submarine telegraphy have the conducting-core formed of a metallic wire a surrounded by, preferably, an uneven number of segmental wires b laid helically. The wires may be shaped before or after winding, c shows the insulation.
GB189823411D1898-11-071898-11-07Improvements in the Manufacture of Electrical Cables for Submarine Telegraph purposes.
ExpiredGB189823411A
(en)
Improvements in Apparatus Employed for Covering Telegraph Cables and Wires with Lead or other Metallic Substance for Electric Purposes, or for Manufacturing Metallic Pipes or Tubes or like uses