Time delay fuze

Claim 1

A TIME DELAY FUZE COMPRISING: A HOUSING; AN DRIVEN ELEMENT MOUNTED WITHIN SAID DRIVEN ELEMENT; AN EXPLOSIVE CHARGE WITHIN SAID DRIVEN ELEMENT; MEANS INCLUDING A FLUID-PERMEABLE ELEMENT FOR OPPOSING THE DISPLACEMENT OF SAID DRIVEN ELEMENT AS A FUNCTION OF TIME; A FIRING PIN WITHIN SAID DRIVEN ELEMENT; ACTUATING MEANS CONSISTING OF A SINGLE SPRING TENDING TO DRIVE THE FIRING PIN INTO FIRING POSITION; AND MEANS FOR NORMALLY LOCKING THE FIRING PIN AND THE DRIVEN ELEMENTS AGAINST RELATIVE DISPLACEMENT; THE SPRING BEING DISPOSED BETWEEN THE FIRING PIN AND THE HOUSING SO THAT THE SPRING DRIVES BOTH THE FIRING PIN AND THE DRIVEN ELEMENT TOWARD TEH FLUID-PERMEABLE ELEMENT; THE LOCKING MEANS AND THE HOUSING BEING SO FORMED AND ARRANGED THAT AFTER A PREDETERMINED DISPLACEMENT OF THE DRIVEN ELEMENT THE LOCKING MEANS IS RELEASED FROM THE FIRING PIN TO PERMIT THE LATTER TO BE DRIVEN BY THE SPRING AGAINST THE EXPLOSIVE CHARGE; THE HOUSING AND DRIVEN ELEMENTS BEING FORMED WITH LEAD-OUT CHANNLES WHICH TO NOT REGISTER TO ARM THE FUZE UNTIL SAID DISPLACEMENT IS SUBSTANTIALLY COMPLETED.