VELOCITY DISCRIMINATING TIME MECHANICAL ORDNANCE FUZE

A mechanical ordnance fuze having an arming slider held by a timer controlled lock and a catch rod. Axially aligned with the catch rod are a pair of centrifugally opened detents attached to a shaft rotated by a wind driven vane. When the vane is rotating sufficiently fast to open the detents, the catch rod, released by the timer, passes between the detents and clears the arming slider, thereby allowing the slider to arm when released by the lock. Otherwise the catch rod is blocked by the unopened detents and when the timer operates to unlock the slider, it is caught by the catch rod and the fuze remains unarmed.