Crimp Joint Resistance Restoration Technique
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
A capacitive discharge unit is utilized to restore good resistance values to crimp joint connections at the ends of transitional head jumper wires for circuit card testers. The capacitive discharge unit consists of a bank of capacitors 1 that are discharged through the jumper wire 2 in the transitional head 3 via a power silicon-controlled rectifier. The discharge unit has a constant current source, voltage comparator unit 4 and voltage-to-frequency converter 5 to indicate the status of the unit and jumper being restored. The constant current source and voltage comparator 4 operate lights in the probe unit 6 to indicate whether the jumper resistance is below an acceptable value. This measurement is made prior to and after capacitive discharge to indicate restoration of good resistance to the jumper.