发明授权
US4459008A Camera having a sound-making element 失效
相机具有声音元素

Camera having a sound-making element
摘要:
In the disclosed camera a sound-making element is provided to produce warning signals or confirming signals for operation of a self-timer. A binary counter which digitally controls the camera controls the sound-making element. Warning signals and confirming signals for operation of a self-timer are distinguished from each other by a difference in oscillation pulses.
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