Transmission apparatus

Details Transmission apparatus Transmission apparatus

H - Electricity

04

L

340/101

H04L 5/00 (2006.01) H04B 1/74 (2006.01) H04L 25/02 (2006.01)

Patent

CA 1152602

ABSTRACT OF THE DISCLOSURE A signalling apparatus has at least one transmitter in a trans- mitter assembly for transmitting a signal by impressed current to several spatially separated receivers. A series circuit of threshold members is con- nected to the output terminals of each transmitter, the number of members corresponding to the number of receivers. The input of each receiver is connected to a threshold member; the receivers are therefore connected in series on the input side. It is ensured thereby that the same current flows through all receivers. In the event of a failure of a transmission line or a receiver, the current continues to flow through the associated threshold member so that signal transmission to the other receivers continues unin- terrupted.

353515

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