Dialling pulse adjustment assembly for telephone dial switch - has automatically adjusted post fixing degree of spring contact bendings

摘要

The dialling pulse adjustment assembly is for telephone dial switches and can be adjusted automatically at lower cost than manual adjustment. The change in the angle of bending of the free end of the first spring contact (1), from which the corresponding change in relative movement between both contacts and therefore the pulse properties results, is detemined by an adjustment post (7) that moves towards or away from it. The two contacts are moved by a rotating cam (3) with arm (4), and the adjustment post is moved automatically by comparing the actual pulse properties with the required properties.