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| Number | Title | Issue Date |
| 5350134 | Target identification systems A target identification system includes a target marker for selecting, and directing radiation at, a target, a weapon delivery system, and means for establishing a two-way communication channel between the two by reflection from a selected target. The com... | 09/27/1994 |
| 5293394 | Raman laser This invention provides a Raman laser wherein a light beam from a laser source (1) passes through a first chamber (3) and experiences Raman scattering, and then passes through a second chamber (9) and experiences further Raman scattering, such that the ou... | 03/08/1994 |
| 5258988 | Raman laser The present invention provides a Raman laser wherein hazardous radiation from a pump laser source 20 is focused by lens 25 via a cell 27 containing a Raman active medium before passing to a absorbing beam dump 30. Lasing action is maintained within the ce... | 11/02/1993 |
| 5252978 | Collision warning system A collision warning signal for at least one vehicle is provided by transmitting from the surface of the earth a radio signal, receiving at the surface of the earth, a radio signal returned by a vehicle in response to the transmitted radio signal, determin... | 10/12/1993 |
| 5245880 | Gryoscope control system A control system for, for example, a null-point gyroscope is provided in which, to minimize stiction, the control system is arranged to apply a decreasing oscillatory drive output to a precessed element of the gyroscope.... | 09/21/1993 |
| 5241391 | Video camera system for recording a scene and a head-up display To overcome the problem met with a video recorder for a conventional HUD camera, in which the HUD camera records the view received via the pilot's combiner and in which the symbols can appear too faint to discern in some conditions, separate sensors A and... | 08/31/1993 |
| 5235405 | Detector apparatus for detecing coherent monohromatic point-source radiation Detector apparatus includes a dispersive prism (10) and a diffraction grating (11) of the type which produces only zero and first order diffraction patterns. Located behind the diffraction grating (11) so as to interact with the first harmonic content of ... | 08/10/1993 |
| 5191412 | Inspection device for aircraft engine To permit in-flight inspection of an aircraft engine, an imager views the front of the engine, and includes an image intensifier which is gated on and off at the engine speed. Small variations about the engine speed may be used to sweep all the blades int... | 03/02/1993 |
| 5187540 | Optical system for the remote determination of position and orientation An optical system, for the remote determination of the position and orientation of a body in a frame of reference, e.g. a helmet within a cockpit of an aircraft, comprises co-operating light emitting means and light sensing means. At least three of one ty... | 02/16/1993 |
| 5151820 | Zoom lens A zoom lens, for use in a telescope at infra-red wavelengths or single wavelength visible light, provides a magnification which may be adjusted to either of two predetermined values. The lens comprises a pair (14) of similar elements (15, 16) fixed relati... | 09/29/1992 |
| 5059028 | Ring laser gyroscope having means for maintaining the beam intensity A closed path (14) around which two beams of laser radiation may pass in opposite directions is formed in a block (10) of material and is defined by at least three mirrors (11, 12 13). One of these mirrors (11) is partially transmissive of laser radiation... | 10/22/1991 |
| 5047667 | Voltage difference detector A circuit is provided to detect which of a simultaneous plurality of varying input signals has the dominant maximum amplitude. Two simultaneous input signals are compared with each other; or each of more than two simultaneous input signals is compared ind... | 09/10/1991 |
| 4989776 | Method of brazing articles containing aluminum Articles of aluminum, or of an aluminum alloy, can be brazed satisfactorily, employing an aluminum alloy as the brazing material, by removing any surface oxide layers from bodies comprising the articles, and preforms of the brazing material, simultaneousl... | 02/05/1991 |
