1. A TIME DELAY MECHANISM INCLUDING A HOUSING MEANS, A G-FORCE OPERATED TIMING DEVICE MOUNTED WITHIN SAID HOUSING MEANS, SAID DEVICE INCLUDING A CENTRAL CORE HAVING PASSAGEWAY MEANS EXTENDING THERETHROUGH, AN UPPER BELLOWS, A LOWER BELLOWS, EACH OF SAID BELLOWS BEING CLOSED AT ITS OUTER END AND BEING ATTACHED AT ITS INNER END TO SAID CORE, THE INTERIORS OF SAID UPPER AND LOWER BELLOWS BEING PLACED IN COMMUNICATION BY SAID PASSAGEWAY MEANS, A FLUID WITHIN AND SUBSTANTIALLY FILLING ONE OF SAID BELLOWS WHEN IT IS IN AN EXPANDED POSITION, MOVABLE FLOW RESTRICTING MEANS WITHIN SAID PASSAGEWAY FOR ALLOWING SAID FLUID TO FLOW FROM ONE OF SAID BELLOWS TO THE OTHER THEREOF MORE EASILY IN ONE DIRECTION THAN IN THE OTHER, AND RESILIENT MEANS WITHIN SAID HOUSING FOR URGING SAID LOWER BELLOWS TOWARD A COLLAPSED POSITION, ACTUATING APPARATUS ALSO MOUNTED WITHIN SAID HOUSING MEANS, AND MEANS WITHIN SAID HOUSING MEANS FOR OPERABLY CONNECTING SAID TIMING UNIT WITH SAID ACTUATING APPARATUS, SAID LAST-MENTIONED MEANS BEING ADAPTED TO RELEASE SAID APPARATUS FROM A COCKED POSITION AFTER PASSAGE OF A PREDETERMINED PERIOD OF TIME, AS MEASURED BY THE FLOW OF FLUID BETWEEN THE BELLOWS WITHIN SAID TIMING DEVICE.