| 摘要 |
1,110,580. Electric selective signalling. SIEMENS A.G. 22 Sept., 1965 [22 Sept., 1964], No. 40305/65. Heading G4H. An arrangement for supervising the pulse condition on one or several lines L comprises a control magnetic core K for each line L having a polarizing winding which magnetizes the core when an enquiry pulse is transmitted via a switch U and a read winding G which is energized after the switch U has been opened if a pulse exists on the line L. The energizing of the read winding G preferably results in the lighting of a lamp Z. If there are several lines (L1-LW) (Fig. 5, not shown) they are scanned sequentially during an enquiry cycle. |
