Electromagnetic coupler for use with a telephone set

Details Electromagnetic coupler for use with a telephone set Electromagnetic coupler for use with a telephone set

1974-05-30

1976-04-20

Claffy, Kathleen H.

179 1C, H04M 100

Patent

active

039521672

ABSTRACT:
An electromagnetic coupling device for use with a telephone set having a hand hole in the rear thereof, the coupling device comprising a hollow plug removably insertable in the hand hole; a first winding of wire disposed within the hollow plug for receiving electrical signals from the telephone set; a second winding of wire disposed within the hollow plug for transmitting electrical signals to the telephone set, the wire of the second winding being substantially thicker in cross section than the wire of the first winding.

REFERENCES:
patent: 2381097 (1945-08-01), Adams
patent: 2829202 (1958-04-01), Spera
patent: 2911485 (1959-11-01), Harris
patent: 3585303 (1971-06-01), Chieffo

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