Portable Commutator

The Portable Commutator was a telecommunications device that was used by the military during World War I. It was manufactured by Northern Electric Company.¹ It was used as a one-wire telegraphic switchboard.²

References

Douglas Hunter (January 5, 2018). "Nortel". The Canadian Encyclopedia. Retrieved February 15, 2021.
Savid Vye (May 15, 2012). "Goliath's Fall". Microwave Journal. Retrieved February 15, 2021.

[1] Douglas Hunter (January 5, 2018). "Nortel". The Canadian Encyclopedia. Retrieved February 15, 2021.

[2] Savid Vye (May 15, 2012). "Goliath's Fall". Microwave Journal. Retrieved February 15, 2021.

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