Cordless transmitting and receiving apparatus

Details Cordless transmitting and receiving apparatus Cordless transmitting and receiving apparatus

1982-12-07

1984-07-24

Ng, Jin F.

Telecommunications

Carrier wave repeater or relay system

With frequency conversion

455 41, 179 251, 179 2EA, 340310R, H04B 714, H04H 108

Patent

active

044621132

ABSTRACT:
A cordless transmitting and receiving apparatus which is capable of providing transmitting and receiving between a key transmitting and receiving apparatus such as a telephone and a portable remote transmitting and receiving apparatus and in which a transmission signal from the key transmitting and receiving apparatus is received in the remote transmitting and receiving apparatus by electromagnetic induction through a commercial AC power line. The cordless transmitting and receiving apparatus has a relay transmitter, which transmits a transmission signal from said remote transmitting and receiving apparatus to said key transmitting and receiving apparatus through said AC line. The receiving circuit of said key transmitting and receiving apparatus is electrically connected to said AC line whereby the transmission signal from said transmitting and receiving apparatus is transmitted to said relay transmitter in a wireless fashion and transmitted between said relay transmitter and said key transmitting and receiving apparatus by said AC line.

REFERENCES:
patent: 2298435 (1942-10-01), Tunick
patent: 2411786 (1946-11-01), Halstead
patent: 2962547 (1976-06-01), Pattantyus-Abraham
patent: 3280259 (1966-10-01), Cotter
patent: 3366744 (1968-01-01), Miller
patent: 4058678 (1977-11-01), Dunn et al.

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