Abstract: Propellant pressure forces generated within the bore of a gun barrel are lied to a projectile through a self-adjusting obturator to prevent projectile blow by of propellant explosion products. The propellant forces are transmitted through a body of shock-absorbing fluid in the obturator protectively isolated from surfaces of the barrel and projectile by a non-porous, flexible enclosure wall deformed into sliding contact with the barrel bore during projectile launch for preventing propellant pressure loss.

Abstract: Inkless skin printing apparatus and method featuring unique cooperation of common, harmless, odorless solvent in association with ordinary thermal (fax) paper material. The skin area is coated with a substance which includes the solvent and then impressed onto and withdrawn from the thermal paper, thereby visibly forming a developing impression on the thermal paper which eventually fully develops into a quality skin print. Heat application to the developing impression may serve to accelerate and/or enhance the development. Skin prints such as fingerprints are generated according to this invention with "no muss, no fuss, no-clean-up-required" neatness and efficiency, and if desired with on-location portability.

Abstract: Radiant energy intermittently emitted from a transmitter is reflected as o pulses from a moving target being interrogated to produce Doppler signals by counting of photons of the echo pulses during time domain intervals between emission from the transmitter. Such counting of photons is limited to the time domain intervals by operational control of a laser pump through which a reference beam is generated at an energy level activating detectors irradiated by such beam to count the photons absorbed therein after capture of the photons by a receiving antenna.

Abstract: Pulses of short duration are radiated by an impulse radar transmitter wit time domain intervals under control of a clock to monitor a moving target from which echo pulses are reflected. The echo pulses received are measured by a quantum detector in terms of photon energy levels to supply signal data processed during periods between said time domain intervals.

Abstract: A 360 degree surveillance system for detecting an infrared IR signal coming rom a scene. The IR signal is reflected by the scanning mirror to an imaging lens. The scanning mirror rotates 360 degrees around a vertical axis. The imaging lens images the IR signal through a derotator onto a linear array of IR detectors. The derotator serves to keep the image of the IR scene in a proper orientation. The detectors sense the IR signal and produce a current proportional to its strength. Each detector is the beginning of a channel of information. Each channel has operational amplifiers to process the signal, control gain, restore dc, etc. The output of the amplifiers are fed to a linear array of LED's. The light output of the LED's passes through a rotator and is imaged by a projector lens, after reflection off a rotating mirror, onto a cylindrical screen. The purpose of the rotator is to keep the image of the LED's in the proper orientation on the screen.

Abstract: An electro-optical target acquisition system having a scanning mirror which otates through a 360.degree. azimuthal plane. The infrared (IR) signal of a target is reflected off a mirror and imaged by a lens through an optical derotator onto a linear array of IR detectors. The detectors produce a current proportional to the strength of the IR signal. The current of each detector channel is amplified and fed to a corresponding light emitting diode, LED, that is part of a linear array of diodes. This light is imaged by a coupling lens through an optical rotator onto the photosurface of an image intensifier tube. The light image of the LED's creates a corresponding electron image. The electron image is swept across the tube and impinges onto the tube's phosphor output plate and creates a light output. The light output is an intensified image of the LED's.

Abstract: A 360 degree infrared surveillance system comprising a scanning head rota on a turntable having optics and IR detectors in a vertical linear array, amplifiers for each detector and light emitting diodes for each respective detector/amplifier channel. The light from the LED's is imaged onto photodetectors whose output is amplified and fed to a corresponding LED. An optical rotator causes the image of their light to rotate. A lens images this light onto photodetectors located on the projector turntable, rotating synchronously with the scanner head. The photodetector current is amplified and fed to a linear array of LED's and imaged onto a cylindrical screen for display.

Abstract: A projection display for producing a bright image of pictorial quality from a large time bandwidth video signal produced by a plurality of light emitting diodes (LED's).