Accession Number : ADB001902


Title :   Miniature Precision Detonator


Descriptive Note : Final rept. Jul 1973-May 1974


Corporate Author : SPACE ORDNANCE SYSTEMS INC SUNNYVALE CA


Personal Author(s) : Nakaoka, Shigeru


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/b001902.pdf


Report Date : Jun 1974


Pagination or Media Count : 124


Abstract : This report describes a two-pin miniature precision detonator (MPD) for use in space-limited safety and arming (S and A) devices providing multipoint initiation of missile warheads. The detonator is a fast-acting electric type not larger than the single-pin USAF Microdetonator, P/N 66A11302, but with less sensitivity (80 milliamperes versus the specified 10 milliamperes for the Microdetonator no-fire). The foremost purpose of the design is simultaneous initiation of a number of detonators. This is best achieved by a very short firing time for the nominal unit. Two header designs were evolved: (1)platinum-tungsten alloy 479 wire bridge and (2)thin-film palladium bridge, vacuum deposited on a vacuum deposited chromium base. The two headers were used to make full-up detonators. Both headers and detonators were tested using a capacitive discharge firing unit (22-microfarad capacitor charged to 30 to 40 volts). Test units were fired by mercury relay. Firing times were 4 to 5 microseconds with + or - 1.0 microsecond jitter for the wire bridge and 1 microsecond + or - 0.5 microsecond for deposited bridge. The deposited bridge units were therefore preferable for use where simultaneity is important.


Descriptors :   *DETONATORS , ARMING DEVICES , BRIDGES , CHROMIUM , DEPOSITION , ELECTRIC BRIDGES , ELECTRIC POWER , MICROSECOND TIME , MINIATURIZATION , PALLADIUM ALLOYS , PINS , PLATINUM ALLOYS , PRECISION , QUICK REACTION , RELAYS , REPORTS , SAFETY , SAFING AND ARMING(ORDNANCE) , SENSITIVITY , SHORT RANGE(TIME) , SYNCHRONISM , TEST EQUIPMENT , THIN FILMS , TIME , VACUUM DEPOSITION , WIRE


Subject Categories : Guided Missile Warheads and Fuzes
      Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE