公开(公告)号：US3576949A

公开(公告)日：1971-05-04

申请号：US3576949D

申请日：1968-01-18

Applicant: INT STANDARD ELECTRIC CORP

Inventor： DEWIT FRANS CORNEEL LEO ,  ADELAAR HANS HELMUT

IPC: H04Q3/00 ,  H04Q3/48

CPC classification number: H04Q3/0012

Abstract: A multistage relay crosspoint network is disclosed in which a connection is held operated through the windings of the relays, each in series with its make contact. In a four-stage connection the hold contacts of the 1st and 2nd as well as those of the 3rd and 4th stages are serially connected and such hold connections replace similar parallel ones involving marking contacts. The invention substantially reduces the number of marking relays needed to establish connections by having the windings of the 1st and 2nd as well as those of the 3rd and 4th stages on the same side and by selecting, through access relay contacts, the desired crosspoints in the 1st and 3rd stages while marking rectifiers are used in the 2nd and 4th to enable bundles of marking wires to be selected in these stages in order to operate the desired crosspoints in these stages also.

公开(公告)号：US3536847A

公开(公告)日：1970-10-27

申请号：US3536847D

申请日：1968-01-18

Applicant: INT STANDARD ELECTRIC CORP

Inventor： ADELAAR HANS HELMUT ,  WIT FRANS CORNEEL LEO DE

IPC: H04Q3/00 ,  H04Q3/42

CPC classification number: H04Q3/0012

公开(公告)号：US3567865A

公开(公告)日：1971-03-02

申请号：US3567865D

申请日：1968-01-18

Applicant: INT STANDARD ELECTRIC CORP

Inventor： CHU PE TSI ,  ADELAAR HANS HELMUT ,  TERMOTE ALOIS RENE

IPC: H04Q3/54 ,  H04Q3/545

CPC classification number: H04Q3/54 ,  H04Q3/545

Abstract: In a telecommunication system having a plurality of line terminals and common control means, a novel switching network having a first and a second part is provided through which communication paths are established between selected pairs of the line terminals coupled to the first part. A first group of a plurality of output terminals of the first part is connected to a plurality of input terminals of the second part. A second group of the output terminals of the first part is directly connected to a selected group of output terminals of the second part. This manner of interconnection between the first and second parts eliminates the need for an additional switching network otherwise required in prior art devices for completing the communication paths between selected pairs of the line terminals.

公开(公告)号：US3532976A

公开(公告)日：1970-10-06

申请号：US3532976D

申请日：1968-01-17

Applicant: INT STANDARD ELECTRIC CORP

Inventor： ADELAAR HANS HELMUT ,  GOETHEM JAN VAN ,  BRUSSEL MARCEL ARTHUR VAN

IPC: H04Q3/00 ,  G01R31/02

CPC classification number: H04Q3/0012