| 摘要 |
A selector switch is furnished for each of a plurality of slide projectors. The switch may be closed either manually or through a corresponding feeler operating in conjunction with a punched tape. This causes the selective slide projectors to be set for a slide change. A control signal then causes all selected slide projectors to change slides simultaneously. A synchronizing system is furnished for synchronizing the transport of the tape to the end of the control signal for an automatically controlled slide show.
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