Abstract: The invention relates to a device for imparting a non-explosive and a non-propulsive property to a rocket motor casing made from a composite material during a slow cook-off test, which consists of using a predetermined pyrotechnic pellet having an ignition temperature of at least 140.degree. C. but below the violent ignition temperature of the propellant material under slow cook conditions, whereby the composite material of said casing is significantly weakened in the predetermined temperature, causing a casing failure and a non-propulsive burning of the rocket motor. The predetermined pyrotechnic pellet is located on the inner surface and will ignite the propellant grain at a lower rate.

Abstract: An add-on armor system for releasable attachment to an external surface of a hull of a vehicle comprising a plurality of juxtaposed armor tiles. Each armor tile is releasably attached to the hull of the vehicle by means of a fastening assembly and has an attachment surface matching the hull portion to which it is attached. The fastening assembly is a snap-type assembly which has a first engagement member in form of a profiled shank and a second engagement member comprising a profiled socket serving as releasable catch for snappingly engaging the profiled shank. The fastening assembly further comprises a shock absorbing plate secured to the hull.

Abstract: A device for imparting non-explosive and non-propulsive properties to a warhead during a slow cook-off test, which comprises a pyrotechnic pellet located inside a tube having a predetermined ignition temperature of at least 130.degree. C. but below the violent ignition temperature of the material under slow cook-off conditions, whereby the venting holes present in the aft closure of said tube, are covered by a composite material that loses its strength below the predetermined temperature, causing a pressure relief and a non-propulsive burning of said warhead.

Abstract: The present invention relates to paint compositions which provide a Chemical Agent Resitant Coating (CARC), consisting of one layer topcoat paint system, which imparts an increase in the reflectivity at the thermal infra-red region, while controlling the colour in the visible range and are maintaining a low gloss, comprising: an extender selected from polyolefins and substituted polyolefins; a pigment, selected from a metal oxide calcined at a temperature of above 600.degree. C. and a paste of metal flakes and any mixture thereof; a binder consisting of a modified polyurethane resulted from an isocyanate and a co-reactant possessing at least two hydroxy groups, and a solvent system to dissolve the components in the paint composition.

Abstract: An infra-red vascular angiography system comprising a readily displaceable infra-red camera including an infra-red optical assembly of high sensitivity capable of receiving and transmitting with minimal distortion an infra-red image of an object within an angular range of substantially .+-.45.degree. with respect to a normal to the object; infrared detector for detecting, the infra-red image transmitted from the optical assembly and converting it into successive electric output signals; video imaging device coupled to the detector for digitizing the output signals and converting them into successive digitized video image frames or successive portions of them; image processor coupled to the imaging device adapted to receive the successive video frames or portions of them so as to process them so as to form enhanced video images and display device coupled to the image processor.

Abstract: A system for the monitoring and, when required, correcting, the winding of filament pack of an essentially transparent optical fiber on a bobbin, and a method for effecting such winding. The system comprises a conventional filament winding device combined with an of indirect illumination of the fiber for projecting on a screen an enlarged silhouette of the uppermost layer of such filament as it is wound under controlled tension onto the bobbin, and a mechanism for interrupting such winding and effecting corrections whenever required. There may be provided a mechanism for automatically following the progress of the winding so as to maintain the silhouette in the filed of view on the viewing screen.

Abstract: A conversion kit for upgrading an existing fire control radar system having a target radar antenna for tracking a target to enable the system also to track, with respect to the target, a missile having a beacon transmitter. The conversion kit includes a missile antenna for measuring and commanding the missile, a mechanism for attaching the missile antenna to the target radar antenna of the fire control radar system, a command transmitter for transmitting command signals via the missile antenna to a missile, a beacon receiver for receiving from the missile, via the missile antenna, response signals from the missile beacon transmitter in response to the reception by the missile of the command signals, and a guidance computer for utilizing the command signals transmitted by command transmitter, and the response signals received from the missile beacon transmitter, and target tracking signals received from the fire control radar system, for tracking the missile and for guiding it to the target.

Abstract: A coupling between optical fibers, one of which rotates respective a light ensor coupled to another such fiber. The light emanating from the end of the fiber facing the sensor reaches such sensor directly or it is focused onto it by a lens. The area of the sensor is larger than the fiber diameter, which is axially mounted in the rotating body, so as to cancel out misalignments resulting from high speed rotations of the fiber respective the sensor.

Abstract: A system for a cooler comprises: a heat exchange tube receiving a supply of pressurized gas, a gas escape aperture communicating with the interior of the heat exchange tube for permitting escape of the pressurized gas and expansion thereof during cooling mode, and a bypass assembly associated with said heat exchange tube and located after said gas escape aperture which during a cleaning mode enables most of the pressurized gas to exit the heat exchange tube without flowing through said gas escape aperture. The bypass assembly comprises a flush valve which is closed during said cooling mode and which is opened during said cleaning mode. According to a preferred embodiment, the heat exchange tube is helically wound over a cylindrical core and installed inside an insulated housing. The system may also be utilized as a gas purity tester, optionally with an additional gas pressure regulator, wherein a sensor will indicate the extent of the gas purity.

Abstract: A stabilized payload including:a first gimbal arranged for rotation about a first axis and mounted onto a support;a dual gimbal mounting assembly supported on the first gimbal for supporting a sensor; andan environmental protective housing mounted on the first gimbal and enclosing the dual gimbal mounting assembly.

Abstract: An integrally-formed optical imaging system including at least two facing, reflective surfaces defining a single optical axis and formed on a single piece of material.

Abstract: An optical system for transmitting light from an object in a dual field of view, the system comprising optical elements providing alternate optical paths associated with each of a wide and a narrow field of view, at least a portion of the optical paths being in alignment, there being disposed within the aligned portion of the optical paths a blocking element selectably operable to enable passage of the light from the object which is associated with one of the alternate optical paths while simultaneously blocking passage of the light associated with the other alternate optical path.

Abstract: A fire control system for gunnery weapons having a powered gun positioning ystem, a stabilized line-of-sight aiming system comprising: housing apparatus having a fixed orientation with respect to the gun boresight; stabilized electro-optical system apparatus for viewing a target along a stabilized line-of-sight, the stabilized electro-optical system apparatus being contained within the housing apparatus; and apparatus for sensing the azimuth and elevation angles of the line-of-sight relative to the housing apparatus, the sensed angles being provided to the gun positioning system for complete position determination of the gun relative to the stabilized line-of-sight.

Abstract: An improved viewfinder for viewing a landscape along a line of sight, the viewfinder comprising a window periscope comprising a body housing, reflective apparatus mounted on a rotation axis within an end portion of the body housing and being operable to adjust the elevation angle of the line of sight, and optical apparatus fixedly mounted in another end portion of the housing for relaying the line of sight to a viewer in relation to the adjustment; apparatus for supporting the body housing and defining a tilt axis about which the body housing can rotate in a tilting operation; and a transmission apparatus operatively associated with the supporting apparatus and the reflective apparatus for providing the elevation angle adjustment in relation to the tilting operation.