Abstract: The invention is a dual input voltage regulator that has four active parts: a transistor, a resistor, a zener diode and a capacitor. It has one input for main power and one input for turn on power. The dual input allows lower main input voltage and allows the regulator to be synchronized with load.

Abstract: The device is a water temperature controller that has hot and cold water input and an output water temperature that is automatically kept at the temperature at which its hand settable control is set.It has a temperature sensitive element that drives a bellows and the bellows drive hot and cold water valves. The temperature sensitive element is a long, small diameter tube, filled with liquid, to have good coupling between the liquid in the sensing tube and output water to have good response time. The inside volume of the sensing tube is many times the inside volume of the bellows to have good temperature control.

Abstract: The device is a very low noise, no muzzle flash howitzer round and matching tube. It comprises a case, a propellant, a projectile, and a plunger which launches the projectile from the case. With a mount and breech it provides a way of firing projectiles so the enemy cannot discern their source. Rockets may also be launched by this device so their own propellants are ignited well away from the launcher. The device is near silent at muzzle velocities below the speed of sound and it has good range.

Abstract: A simple, low cost device for testing for shorted turns in the winding of electromagnetic coils or transformers by making use of the inductive kick voltage that is developed when the current through a coil is quickly interrupted. It uses rectified, unfiltered AC for power and a high speed switch to control the current through the coil under test. It has provisions for measuring the voltage developed by the inductive kick.

Abstract: An electronic device that converts alternating current to direct current with high efficiency. This is accomplished by constructing the device in such a manner that the device turns itself on slowly so that a surge resistor is not needed.In common power supplies of this type the surge resistor accounts for a large part of the power loss. In making the surge resistor not necessary power is saved.

Abstract: The invention is a device that allows plants to be transplanted with minimum disturbance to the soil around the roots.

Abstract: A projector apparatus has a lamp and magnifying lens located therein with appropriate reflective mirrors for projecting a patch of light onto a screen. Inside of the patch of light is a dark spot created by a non-translucent material on the magnifying lens. A motor with a special cam moves one of the reflective mirrors to cause the patch of light and dark spot to sweep across the screen at a constant speed. A special gun electrically connected with the projector apparatus has a gun firing power unit for creating a short duration, high intensity flash of light upon the pulling of the trigger of the gun. The flash of light is reflected through appropriate mirrors onto the screen. By adjustments in the projector apparatus, compensation can be made for lead and drop of a normal cartridge which an individual is simulating firing in the gun.

Abstract: An apparatus for measuring velocity of a bullet is shown. A portable clamping device securely holds the barrel of a gun in position during firing. A bullet fired from the gun is projected through two openings located a predetermined distance apart from the end of the gun barrel. The bullet passing through the first opening activates a timing circuit to start current flow through a measuring device. The bullet passing through the second opening stops the current flow through the measuring device. The measuring devices gives an output indication that is indirectly proportionate to velocity of the bullet with units indicating the speed of the bullet. The measuring device may be a ballistic meter with no return springs on a meter movement to remain in its maximum position after measuring current flow therethrough.