DE2012900

1298350 Cable testing STANLEY DENKI KK (STANLEY ELECTRIC Co Ltd) 30 Dec 1969 [13 May 1969] 63222/69 Heading G1U The continuity of conductors in a multiconductor cable whose ends are respectively connected to two connectors is tested automatically by an apparatus incorporating two connection adapters for respective connection to the connectors, one adapter having the same number of terminals as there are cable conductors, connected in pairs, the other having the same number of terminals as cable conductors, some terminals being connected in pairs, the rest being equal in number to twice a desired number of groups. The adapters are such that the cable conductors are divided into the desired number of groups, the conductors in each group being series connected between pairs of the rest of the terminals. The apparatus further includes a number of switching units operable in sequence and each respectively connectible with a group of series connected conductors via the second adapter, and assuming an ON state when a corresponding group forms a complete series connection. A control device coupled with a first switching unit enables a test sequence to be initiated, by connecting a supply in series with the first switching unit. Each switching unit has a self holding arrangement coupled with it. Second control devices are each operated by a corresponding switching unit in its ON state to connect the supply in series with the next unit in sequence. Each unit in its ON state releases the ON state of the preceding unit. The test results are indicated by a display arrangement operated by the switching units. To test a cable 20 Fig. 2 incorporating twelve conductors and having connectors 21, 23, adaptors 22, 24 inter-connect the conductors into three groups each of four series connected conductors. The adaptor 24 provides terminals enabling the groups to be connected to appropriate terminal pairs 34, 35, 36 &c., of a test circuit Fig.3. Voltage is applied to a first switching unit in this circuit by operating switch 32. This establishes a current path through relay A, contacts 30-1a, 30-0a of switch 30, the conductor group 1a, 1b if properly in order, contacts m 4 , i 4 ... a 4 and contacts 30-1s, 30-0s. The operation of relay A illuminates lamp 40 by closing a 2 , brings in self holding contact a 1 , and changes over a 4 to enable a similar path through relay B to be completed if the respective conductor group is in order. If this is in order, lamp 49 is illuminated, t