摘要 |
<p>A toy with sound-activated motion is provided The toy comprises a toy body, a single motor within the body, adapted to turn in opposite directions in response to changes in electrical polarity, and control means to automatically reverse the polarity of an electrical current being supplied to the motor in response to an acoustical or electromagnetic input signal The control means is adapted to automatically reverse the polarity in response to a changing acoustical or electromagnetic input signal</p> |