Ericsson metal phone with Victorian imagery
1910
Chisholm & Dunn Telephone Appliances Ltd. Desk Set
1910
Ericsson 'special protection' industrial phone
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L.M. EricssonL.M. EricssonTelefonaktiebolaget LM Ericsson, commonly known as Ericsson, is a Swedish multinational networking and telecommunications company headquartered in Stockholm. Ericsson has been a major contributor to the development of the telecommunications industry and is one of the leaders in 5G. Ericsson has over 57,000 granted patents, and it is the inventor of Bluetooth technology.Read more on Wikipedia → · Swedish
About This Phone
Magneto wall telephone with special protection against high-tension currents, polished walnut case, interior lined with earthed iron sheets (partially rusty), 5-magnet crank inductor, insulated ebonite crank, double bell, dummy handset, the sound being carried by means of 2 rubber tubes to transmitter and receiver in the case. Ericsson marketed telephones with "special protection against high tension currents" (high voltage) primarily for power companies, railways, and industrial sites. At the time, these organizations were running telephone lines in close proximity to high-voltage power transmission lines, creating significant safety and technical risks ('induced currents' and surges).
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