Abstract: A method is provided of making radiation compensated quartz crystal oscillators. According to the method, at least two quartz crystal oscillators are first selected that have different responses to energetic radiation from gamma rays, neutrons, etc. Each oscillator is characterized individually as to its radiation sensitivity, the oscillators then exposed to the same radiation flux and the respective output frequency extracted from each oscillator. The frequency difference between the oscillators arising from the influence of the radiation flux is then derived. A correction signal is then derived from the frequency difference and the known radiation sensitivities. The correction signal is then applied to one of the oscillators to effect radiation compensation of its frequency.

Abstract: A directional coupler is formed with adjacent edges of its microstrips following curved paths having reversals in curvature such as a series of sine waves or half circles.

Abstract: A magnetic device of permanent magnet materials for the control of linearly xtending annular cross-sectioned magnetic fields formed of two concentrically nesting magnetic tubular elements defining an annular space therebetween, and inner and outer cladding magnets radially disposed around the outer of said tubular elements and interiorly of the inner of said tubular elements, the cladding magnets being thicker at the end extremities and diminishing in thickness towards and to the plane of zero magnetic potential at or near the center line of the device measured along its longitudinal axis.

Abstract: An objective with two lens elements has a first fully-reflective plane mir between the lens elements, and a second such mirror between the objective and a detector. The outermost lens element and the first mirror are carried in a housing rotatable with respect to another housing carrying the other lens elements and the second mirror. The other housing is rotatable about an axis between the second mirror and the detector. The system may thus do elevation scanning by rotating the first housing, and azimuth scanning by rotating the two housings about the mentioned axis. Image stabilization is accomplished by appropriately stabilizing one or both mirrors.

Abstract: A projecetile for firing in a gun barrel has a jacket and a load. A bearing leeve is mounted in the jacket and the jacket is of a different material than the bearing sleeve. A journal sleeve is mounted in the bearing sleeve to axially rotate therein. The load is mounted in the journal sleeve to rotate therewith. Thus angular rotation of the load with respect to the gun barrel is reduced.