Central station system transmission apparatus

Details Central station system transmission apparatus Central station system transmission apparatus

1976-05-28

1978-01-10

Olms, Douglas W.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 51, 3401461BE, 340214, H04B 346

Patent

active

040681050

ABSTRACT:
Apparatus for transmitting signal information between central and remote stations in a central station system such as a central station alarm system. The transmission apparatus can continue to transmit information despite the occurrence of any of several types of fault conditions in the transmission line. Apparatus can be provided for detecting various transmission line fault conditions, indicating the nature of those fault conditions, and modifying the transmission apparatus to compensate for those fault conditions.

REFERENCES:
patent: 253080 (1882-01-01), McCulloh
patent: 477068 (1892-01-01), Rowand
patent: 3497619 (1970-02-01), Babcock
patent: 3500377 (1970-03-01), Muehter
patent: 3652867 (1972-03-01), Zinn
patent: 3987341 (1976-10-01), Clark
patent: 3989908 (1976-11-01), Budrys et al.
"McCulloh Circuit Operation" ADT Bulletin, 8-61, pp. 1-8.

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