USA As Represented by Secretary of the Navy

Michael Beggans

Gerald R Laib

Daniel Louis Jean

David Olson

Ezra Chen

John E Hendershot

Lawrence C Fan

An apparatus for compressing powders and the like including a head assembly with a distensible elastic platen mounted in a chambered header plate containing a pressurizing fluid. The elastic platen distends in response to the pressurizing fluid. Further, a base assembly includes a rigid platen mounted in a base plate. The rigid platen includes a face with at least one cavity, into which is added powder to be compressed. The elastic platen is aligned with the rigid platen, and during compression, the two platens may be held firmly in contact. The pressurizing fluid pumped into the head assembly causes the elastic platen to deform forming a single distention per cavity. The distensions compress the powder to an optimal density. The apparatus safely and easily compact multiple small samples of explosives and the like into miniature charges.

Apparatus for making miniature explosive powder charges

A method for making miniature explosive powder charges or other compressible materials, including providing a material to be compressed into multiple cavities of a rigid platen, and positioning an elastic platen in contact with the rigid platen. The elastic platen is mounted in a head assembly having a pressurizing fluid. Evacuating the cavities and the material contained therein, and trapping fractious particles and vapors out-gassed from the material. Pressurizing fluid, which causes deformation of the elastic platen to form distensions that project into the cavities and compress the material into compacts. The pressurizing fluid is depressurized enabling the distensions to retract and the elastic platen to return to a non-deformed state. Finally, separating the elastic and rigid platens and collecting the compacts, which may be miniature explosive charges having an optimized density.

Method for making miniature explosive powder charges

A MEMS fuze having a moveable slider with a microdetonator at an end for positioning adjacent an initiator. A setback activated lock and a spin activated lock prevent movement of the slider until respective axial and centrifugal acceleration levels have been achieved. Once these acceleration levels are achieved, the slider is moved by a V-beam shaped actuator arrangement to position the microdetonator relative to a secondary lead to start an explosive train in a munitions round.

MEMS fuze assembly

A MEMS mechanical initiator having a striker arm extending from a striker body. The tip of the striker arm is adjacent to, but does not touch, the side of a microdetonator. A cocking and release mechanism moves the striker body such that the striker arm pulls away from the side of the microdetonator against the action of a set of springs connected to the striker body. Thereafter the cocking and release mechanism releases the striker body such that the tip of the striker arm swipes the side of the microdetonator causing initiation thereof.

MEMS mechanical initiator for a microdetonator

A MEMS apparatus having a substrate layer, a device layer and an intermediate oxide layer joining them. A slider is formed in the device layer and includes an enlarged end portion. A walled chamber having a hollow interior in which is positioned a microdetonator is formed in the substrate layer beneath the enlarged end portion and is secured to it by the oxide layer. A drive is operable to move the slider, and with it, the walled chamber, from an initial position to a final position. When in the final position an initiator is operable to initiate the microdetonator.

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Waldorf, MD, United States of America

Michael Beggans