(57) A rotary electric switch, for example an automotive ignition switch, has a rotor,
a case holding the fixed contacts and an interlock mechanism. The interlock mechanism
comprises a plunger and an interlock member carried by the rotor and a camform on
the case which cooperates with the plunger to limit movement of the rotor relative
to the case. The interlock member and plunger coactto normally retain the plunger
out of contact with the camform. At a given position of the rotor the plunger is released,
whereby subsequent movement of the rotor again to the given position is prevented
by engagement of the plunger with the camform.
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