| 摘要 |
A teaching machine operable by a student comprises a tape recorder whose tape stores a series of instructions which terminate in questions each calling for one of several alternative responses, these instructions being successively communicated to the student through a pair of headphones. After each question the recorder stops automatically, by emitting a signal to set a flip-flop in its drive circuit, while one of several conductor bars on the bottom of a card holder is energized through a selector switch to light a corresponding lamp. A card on the holder is orthogonally divided into areas forming rows aligned with respective conductor bars, this card being pierceable by a conductive stylus at an area representing the student's chosen answer. The stylus, on contacting the underlying bar, energizes a stepping motor for the selector switch and simultaneously resets the flip-flop to restart the recorder drive preparatorily to energization of the next bar at the end of the following instructions.
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