Abstract: A mechanism for enabling an aircraft to carry and release a store featuring hanger. The hanger has a hollow portion which is formed with a circumferential inner recess. A circular spring ring with a diameter which is smaller than the diameter of the inner recess, is dimensioned to fit within the inner recess of the hanger and to fit completely within the inner recess when a sufficient outward radial force is exerted upon it. The mechanism further includes a cylinder which fits within the hollow portion of the hanger. When the portion of the spring ring engages the outer recess of the cylinder, the hanger and the cylinder, and, therefore, the store and the carrier, are securely connected to each other. A slidable plunger having wings near one of its ends is used for pushing the spring ring into the inner recess of the hanger.

Abstract: During a portion of each frame, the detector elements of a matrix detector are illuminated at the average intensity of the scene. For each detector element, the ratio of the actual average intensity of the scene to the detector element's measured value of the average intensity is used to calibrate the detector element's measured values during the rest of the frame. In a further embodiment, more accurate calibration of the detector element's measured values is provided by additionally using the slope of the detector element's calibration curve in the calibration.

Abstract: A method for measuring attenuation of light signals passing through an opal fiber and means for effecting such measurements. The attenuation can be measured over varying angles of bend and with light of different wave lengths. The determinations made are of value in the evaluation of effects of bending optical fibers used in telecommunications, with certain sensors and the like.

Abstract: An apparatus for use, for example, as a runway radar signal reflector, for reflecting incoming radar signals, which includes a reflector for reflecting the radar signals, a chamber through which the incoming signals pass on the way to the reflector, and a mechanism for periodically creating a plasma in the chamber so as to prevent the incoming radar signals from being reflected.

Abstract: A method and system for keeping track of artillery firings of each of a ner of artillery pieces, the method including: receiving signals produced by the firings through an array of sensors, such as acoustic sensors; processing the signals to determine which of the number of artillery pieces was the source of the firing; and storing the number of firings of each of the artillery pieces. In alterative embodiments, the method further includes: processing said signals to determine the strength of each of the firings; and storing the strength of the firings of each of the artillery pieces.

Abstract: A method for measuring drag forces acting on optical fibers and thin metal ires as a result of the influence of wind of varying force. Also a system for effecting such measurements, based on means for exposing a tightened fiber or wire to an essentially constant flow of air, while at an angle to such flow, means being provided for measuring forces acting on such fiber or wire.

Abstract: An integrated varactor diode frequency multiplier assembly including a first varactor diode frequency multiplier circuit having a non-stepped waveguide output, a second varactor diode frequency multiplier circuit having a non-stepped waveguide input and a non-stepped waveguide for integrally connecting the output of the first circuit to the input of the second circuit, wherein the impedance level of the input of the second circuit is similar to the impedance level of the output of the first circuit.

Abstract: A multi-spectral optical imaging system comprising first and second facing, reflective surfaces defining a single optical axis, the first reflective surface being integrally formed on a single piece of metallic material, the single piece of metallic material having a central aperture through which the optical axis extends and a plurality of elongate rib members integrally formed thereon which define therebetween a plurality of openings communicating with the central aperture; and the second reflective surface having a focus on the optical axis, whereby radiation impinging on the first reflective surface is reflected therefrom towards the second reflective surface and further reflected from the second reflective surface towards the focus; scanning element associated with the second reflective surface for causing the second reflective surface to undergo scanning motion; beamsplitting element receiving radiation reflected from the second reflective surface; and plural detectors, each operating at a different opt

Abstract: A day/night guided weapon including a chassis, apparatus for providing gud driving of the chassis, an intensified CCD camera mounted on the chassis for providing optical target acquisition under reduced light condition and a high intensity light source mounted on the chassis for providing illumination of a desired area.

Abstract: Forward looking infra-red apparatus including an enclosure, a reflector riving infra-red energy from a field of view and a receiver, which receives the infra-red energy from the reflector and provides an output indication of an infra-red image of the field of view, wherein the receiver is hermetically sealed within the enclosure and the reflector is disposed outside of the enclosure and is foldably mounted with respect thereto so as to assume a first orientation when the apparatus is in operation and a second folded and more compact orientation than the first orientation when the apparatus is not in use.

Abstract: A clamp for joining a pair of elements having generally circular flanges, the clamp including an inner flange engaging portion arranged to provide generally axially extending forces to said flanges for retaining them against one another when substantially radial forces are applied to the inner flange, an outer circumferential strap element and at least one bolt. The clamp also includes a coupler engaging the strap element adapted to provide substantially circumferential tension thereto, whereby substantially radial forces are applied to the inner flange without urging non-circumferential bending of the strap element.