| 摘要 |
In an illuminated rotary electric switch, for use in a motor vehicle to indicate the location of the switch, its condition of operation, and, if desired, its function, a manually rotatable switch member is provided with a central opening arranged so that light can be projected longitudinally therethrough from a single light source so as to indicate the location of the switch (and its function, if desired) and with a further opening which can be brought into and out of registration with an aperture in a fixed portion of the switch through which light from said source can be projected laterally, so as thereby to uncover or mask said aperture and thus indicate the condition of operation of the switch.
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