An optical safety interlock is provided for operating a control circuit or control
switch that enables operator activation of an electrical appliance such as a food
processor. The optical interlock has an emitter for emitting a signal, a detector
for detecting the emitted signal, a reflector for relaying the emitted signal to
the detector, and an actuator for selectively positioning the reflector in two
or more positions. The emitter, detector, and reflector cooperate to close the
control switch when the safety interlock is satisfied. The actuator cooperates
with the reflector to selectively satisfy the safety interlock.