Navistar International Transportation Corporation

Max E Young

Brian P Marshall

Lamar D Yoder

Rodney N Germann

An ignition switch of an automotive vehicle employs a non-contacting key reader for reading a code on a key when the key is inserted lengthwise into the switch. Such a key reader is either a magnetic one that reads a magnetically coded key or an optical one that reads an optically coded key. A detent mechanism defines successive Accessory and On (Ignition) positions as the key is increasingly inserted. Various branch circuits are switched on to the vehicle's electric power supply at these two positions provided that a valid key has been detected. Full insertion of the key physically pushes a spring-loaded plunger of a mechanical start switch at the inner end of the ignition switch, causing start switch actuation and the engine starter motor to crank the engine, provided that the key is valid. Once the engine starts, the key is released and is returned to the On position.

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Albion, IN, United States of America

Max E Young