Devices for successive occupation of intermediate routes, trunks or apparatus at automatic exchanges

摘要

1,122,267. Automatic exchange systems. GOSUDARSTVENNY ELECTROTEKNICHESKY ZAVOD. 14 Oct., 1965, No. 43581/65. Heading H4K. A hunting or allotting circuit comprising a chain of 2-winding relays can be used in association with a number of groups of trunks or apparatus units, the holding windings of the relays being connected over contacts pertaining to a particular group to be tested to contacts indicative of the busy or idle condition of members of the group.