Patent
1982-05-24
1984-04-24
Schreyer, Stafford D.
179 99LC, 179 81R, H04Q 518
Patent
active
044450044
ABSTRACT:
The line circuit of the invention uses only two multiple contact relays. The hold function is controlled with a reed relay having a single contact pair as well as three diodes whereas the line relay is only required to have a single contact pair.
REFERENCES:
patent: 3436488 (1969-04-01), Barbato et al.
patent: 3647983 (1972-03-01), Fitzsimmons
patent: 3748403 (1973-07-01), Schartman et al.
patent: 4351987 (1982-09-01), Feil
Northern Telecom Limited
Schreyer Stafford D.
Turpin F. P.
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