ELECTRONICALLY CONTROLLED CROSSBAR SWITCH

摘要: A crossbar switch for a telecommunication system has relays with operating windings and holding positioned at the junctions of "horizontal" "vertical" conductors individual to respective rows columns, all one row being connected end common row-control circuit their other ends column-control circuits by way these conductors. The two control include controlled rectifiers which during certain periods receive voltage from central power supply selective energization relay in response concurrent firing pulses applied rectifiers. maintenance circuit, also including normally deenergized rectifier, energizes winding selected rectifier corresponding subsequently releases that upon deactivation its own disconnect pulse.