发明授权
US3702551A Time delay combination locks 失效
时间延迟组合锁

Time delay combination locks
摘要:
The disclosure is of a time delay combination lock of simplified construction in which all parts, except the bolt and the lever through which the bolt is actuated, are aligned and mounted for rotative movement about an axis common to the axis of the knobbed dial by which the combination is set.
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