Abstract: A virtual image display system for aircraft is operative to identify threat systems that are proximal the flight path of an aircraft when the aircraft is within the threat range of such threat systems. The virtual image display system is further operative to generate three-dimensional threat envelopes of identified threat systems and to display real-time perspective video images of such three-dimensional threat envelopes for viewing by the pilot.

Abstract: A fastener loading device for a powder-actuated fastening tool comprises a ram-equipped, tubular fastener retaining member hingedly carried on legs secured to the tool receiver and forming therewith a four bar linkage, whereby the retaining member may be displaced from a first position, atop or alongside the receiver, to a second position, in communication with the barrel bore, whereat the retaining member ram may conveniently be utilized to insert the fastener into the barrel.

Abstract: A device and method for temporarily supporting a metallurgical side board in a predetermined position against a vertical surface of an ingot mold, comprising an attachment member, adapted for releasable attachment to a side board, connected to a counterbalance body by a chain. The point of attachment of the chain to the attachment member is offset, relative to the center of gravity of a side board attached thereto, whereby a component of the gravitational force acting on the side board presses the same against the vertical surface of the mold.

Abstract: A connector assembly for use in attaching a lanyard pull wire to the trigger of a powder-actuated tool which is mounted on a pole for overhead use. A tubular member, preferably a spring, receives a wire loop through its bore. The member slips onto the tool trigger, and the lanyard is connected to the wire loop. The connector assembly is thus easily removable and does not require extra tool modification to use.

Abstract: A shoulder firearm is provided with a receiver-mounted collimating optical ight comprising a housing containing a hollow pivoted, reticle holder, an elongated rod of fluorescent material mounted in the forward end of the holder, an inclined first mirror which reflects light from a reticle at the rear end of the rod transversely to a half-reflecting second mirror, parallel to the first mirror, which, in turn, reflects the light back to the shooter's eye. A vertical range scale is mounted on the second mirror adjacent to the reticle image. To aim the firearm, the shooter aligns the reticle image with a distant target. The reticle is adjusted vertically for different ranges by means of a range knob mounted on the firearm near the trigger and connected by pinion and rack gears to the reticle holder, by rotating the range knob while observing the relative positions of the reticle image and range scale. The reticle includes a horizontal fiducial marker.