Abstract: Redundant explosive transfer between two explosive carrier devices is accomplished by inserting into a transfer sub or gun head a non-moveable explosive means for receiving the detonating cord which, at its first end, establishes a gap from an adjacent positive alignment insert (PAI) and wherein the length of explosive means is sufficient to assure detonation between the explosive means and the detonating cord in the event that the detonating cord shrinks due to the temperature of well applications. In the preferred embodiment of the present invention, a positive alignment insert consists of an aluminum insert housing having an annular region of imbedded explosive. The annular region of the explosive-filled insert is typically annularly lined with an aluminum sleeve for protecting the explosive within and maintaining an annular region of sufficient diameter to allow for the passage and placement of the detonating cord and booster.

Abstract: A skyrocket is provided which provides a first fireworks effect prior to launch as well as a second effect after launching. The skyrocket includes a body which houses or is coupled to a rocket motor, a first effect and a second effect. A transparent or translucent nose cone is placed on the top end of the body which provides both the ability to view one of the effects placed therein but also maintains the aerodynamic properties of the skyrocket. The first effect may be a strobing effecting which during burning provides a pulsating intensity of light visible through the nose cone prior to lift-off of the skyrocket, and the second effect may be a bursting charge which explodes after the rocket is in flight. An ignition fuse leads to the first effect and a second fuse leads to the rocket motor so that by lighting the first fuse, no further fuses need be lit and a delay is provided before the rocket motor ignites.