Abstract: A system for supporting and deploying a rocket motor nozzle extension that is stowed in concentric overlapping relationship with the nozzle. The system includes a plurality of articulated frames having first and second pairs of links pivotally connected, respectively, to the nozzle and to the nozzle extension. Articulation for each frame is provided by a knee hinge connecting the two pairs of links at their outer ends, thereby permitting the pairs of links to swing apart. A retractable cable looped around the knee hinges of each of the frames is capable of forcing the hinges inwardly toward the nozzle and nozzle extension to force the pairs of links of each frame apart and to move the nozzle extension to a deployed position at the end of the nozzle. Retraction of the cable is accomplished by a motor driven spool on which the cable is wound.

Abstract: A detonator is formed with a housing having an insert therein. The insert has an axial bore therethrough containing a primer charge, a donor charge and an output charge. The primer charge is carried in a cup like holder disposed in the insert bore and having flash holes therein providing continuity between the primer charge and the donor charge. The donor charge is separated from the output charge by a flyer plate and a barrel through which the flyer plate is propelled into the output charge upon detonation of the donor charge. An output disc at the end of the insert confines the output charge until it is detonated. The insert has spaced and radially displaced openings in the sidewall thereof in communication with the output charge and the donor charge to permit gas to escape from these charges when the detonator is subjected to elevated temperatures.

Abstract: A set back weight is moved by inertial force from a first position to a second position during acceleration of a missile. The set back weight is biased toward its first position to preclude its movement to its second position until the missile undergoes the rate of acceleration which is normally associated with a successful launch of the missile. Upon reaching the second position the weight becomes connected to a piston disposed in a fluid containing reservoir so that when the missile undergoes a reduction in its rate of acceleration and the set back weight moves toward its first position that movement is transmitted to the piston to express fluid from the reservoir. Fluid from the reservoir flows into a working cylinder to move an arming piston therein. Movement of the arming piston is slowed to delay arming of the missile by a flow restricting orifice in the path of fluid flow from the reservoir to the working cylinder.

Abstract: A missile safe and arm system incorporates an electrically triggered explosive train that extends from the missile body to an extendable probe and back to the missile body. When the probe is in its retracted position, the explosive train, and electrical triggering circuit is interrupted and detonator firing leads are shorted and the missile is in a safe condition. Upon launching and upon the extension of the extendable probe, the explosive train and its electrical triggering circuit become aligned, the detonator shorting lead is removed, and the missile is thus armed.