Abstract: A platform having two clamps for securing the barrels of two pistols substantially parallel permitting the operator of the two pistols, using both hands, to hold said pistols by their hand grips and to aim and fire the pistols at the same target simultaneously and/or successively, whereby stability of the two aimed pistols is imparted during repeated firing.

Abstract: The invention is a method and apparatus for utilizing finger control switches connected to a binary code receiver for the purpose of driving a printer and/or a visual and/or audible readout device. The device is made up of a number of switches normally in the open position which can be depressed to a closed position. The input from the switches is communicated to a binary code receiver, which activates a printer, a visual readout or an audible device. The apparatus is used both for communication to other equipment and as a teaching device for physically demonstrating the combination of switch positions required to produce a given command.

Abstract: A composite aircraft comprising a system of airfoils rotating about a horizontal axis providing lift and thrust in combination with a lighter-than-air gas containment bag providing bouyant lift; said aircraft being capable of lifting and transporting a load.