integral to the charge sleeve in yet another embodiment the flexure design is such that once the shutter has been moved into the armed mode the spring forces continue to keep the shutter in the armed mode even if power is removed from the coil rather than return the shutter to the safe mode this provides a latching mode of operation and is useful for an arm fire device operation in use energetic material is placed in the charge sleeve 1806 and electrical bond pads for both the initiator 1802 1802 u2032 and the magnetic circuit coil 1804 1804 u2032 are attached to external sources of electrical power if no power is applied to the coil the flexure structure 1426 1426 u2032 maintains the shutter 1424 in the u201c safe u201d mode with the permalloy shutter fully blocking the path between the aperture in layer one 1202 and the aperture in layer three 1710 fig2 a shows the shutter in the u201c safe u201d mode in u201c safe u201d mode even if the initiator is fired the energetic material will not exit the aperture 1202 in layer one if electrical power is applied to the coil the magnetic circuit is energized and the shutter is drawn in towards the coil fig2 b shows the shutter in u201c armed u201d mode with the aperture in the shutter aligned with the apertures in layers one and three so that energetic material may pass from the initiator material in the charge sleeve to the secondary or high explosive material that interfaces with the invention.