| 摘要 |
A switch including a rotor within a housing with the housing including a circular array of phototransistors. The rotor includes light transmission means such as a fiber optic which transmits light from a centrally located diode to a selected phototransistor. Each phototransistor is in circuit with a power source and with an output lead. A detent retains the rotor against undesired movement.
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