Electromagnetic telephone coupling device

Details Electromagnetic telephone coupling device Electromagnetic telephone coupling device

1981-10-26

1983-11-15

Rubinson, G. Z.

H04M 1100, H04M 908

Patent

active

044157690

ABSTRACT:
This invention relates to a device which permits to transmit and to receive signals through a telephone line by means of an electromagnetic linking brought about in correspondence with at least one inductive element of a telephone set, without any necessity of interrupting the line which feeds the set concerned.

REFERENCES:
patent: 2048604 (1936-07-01), Finch
patent: 2381097 (1945-08-01), Adams
patent: 3100818 (1963-08-01), Carter
patent: 3535456 (1970-10-01), Wilson
patent: 3818140 (1974-06-01), Green et al.
patent: 4115659 (1978-09-01), Spanel et al.
Ford Industries, Inc. Publication, "For Data Coupler/Modems, Low-Speed Data Transmission Anyway You Like It", 1971.
Prentice Electronics Corp. Publication, "Prentice DC22, The Universal Data Coupler", 1970.

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