IGNITION SWITCH LOCK WITH PHOTOELECTRONIC CONTROL OF ELECTROMAGNETIC STOP Russian patent published in 2003 - IPC

FIELD: automotive industry; vehicle electrical equipment. SUBSTANCE: lock contains housing accommodating barrel with key. One stop is provided to interlock turning of barrel and fixing switching positions of switch under action of return spring at turning of barrel. Stop is furnished with electromagnetic drive to unlock the barrel, said drive being controlled by photoelectronic circuit consisting of at least one light emitting element and two light receiving elements installed opposite to each other in said holes of housing and optically coupled through channels passing in barrel body and through key bits. Output of light receiving elements are connected with control unit of electromagnetic stop furnished with device comparing signals from light receiving elements across each terminal with signals programmed in unit. EFFECT: provision of microprocessor control of conformity of key code and lock code and possibility of control of electromagnetic stop. 5 cl, 2 dwg