Appts. testing circuit boards before components are mounted - has movable contact pins combined in pairs or groups and applied to board

摘要

Circuit boards are tested before the components are mounted. In addition to the usual spring-loaded contact pins movable only in the axial direction and applied to the circuit board, other contact pins movable in other directions are used and combined in pairs or groups mounted on supporting plates or strips. Tests are made by applying sequentially one or more pairs of contacts to the conducting traces on the circuit board. The appts. can be formed from exchangeable components, e.g. released and fixed by their axial bolts. These arrangement lightens the reception of various printed circuit board types and sizes.