Improvements in or relating to non-numerical switching arrangements for automatic or semi-automatic telephone systems

摘要

345,266. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd., Columbia House, Aldwych, London. -(Meeuws, V. C. J.; 18, Rue Boudewyns, Antwerp, Belgium.) Dec. 18, 1929, No. 38779. [Class 40 (iv).] Subscribers' lines having a higher rate of calling than a predetermined normal amount are multipled to the banks of auxiliary finders which hunt in addition to ordinary finders when one of such lines calls. The lines having normal and high-calling rates are associated respectively with separate common starting relays FSR, FSR1 the former operating relay ASR to start the ordinary finders only whilst the latter in addition operates relay ASR1 to start also the auxiliarv finders. If all the ordinary finders are busy relay LGR does not energize and lamp L1 is lit, and if in addition all the auxiliary finders are busy when a high-rate subscriber calls relay LGR1 does not energize and lamp L2 is lit.