Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 4914487 | Photoelasticity determination of a deformation or stress field A method for photoelasticity examination of a stress or strain field comprises successive steps. A two dimensional image of a test-piece is formed which has isochromatic fringes in the form of an array of pixels and the grey level of each pixel is stored ... | 04/03/1990 |
| 4881809 | Method and device for measuring distance optically For optical measurement of a distance between a hunter and a target, for instance between satellites, back-reflecting means are provided on the target. The hunter carries a source of substantially monochromatic light pulses and a solid state detector havi... | 11/21/1989 |
| 4848236 | Mine with indirect firing for attacking armoured vehicles A mine for use against armored vehicles has a mount with a base resting on the ground and an ammunition launching tube having a fixed elevation and carried by the base for rotation about a vertical axis. The base contains a system for detection and azimut... | 07/18/1989 |
| 4800556 | Optical data transmission with frequency multiplexing A transmitter for multiplexing three optical channels at different wavelengths has (a) first, second and third laser diode means delivering linearly polarized optical beams at respective wavelengths λ2, λ3 and λ4 which are mutually different; (b) an as... | 01/24/1989 |
| 4790566 | Identity document difficult to falsify and a process for manufacturing such a document An identity document has graphical information printed on a support and including uncoded alphanumerical information which is specific to a holder of the document or to the document. The surface of the support is broken down into a network of macropixels ... | 12/13/1988 |
| 4768440 | Warhead for missiles A warhead for a guided missile initiated by a proximity fuse, for use against high speed high altitude targets, comprises a fragmentation casing, an outer explosive charge contained in the casing and having a detonator and an inner explosive charge radial... | 09/06/1988 |
| 4710645 | Device for monitoring the state of an electric switch or an electric relay A device for monitoring the state of a relay comprises an electrical insulation transformer whose secondary winding is connected, through a rectifier, to the output terminals of the relay. The primary winding of the transformer is in series with an oscill... | 12/01/1987 |
| 4709637 | Temperature sensitive pyrotechnical train interruption device A unitary device for venting a rocket motor of an ordnance item having a warhead comprises a circumferential belt containing a cutting explosive charge and constructed for removable mounting around a housing of the rocket motor, and an activating device h... | 12/01/1987 |
| 4553565 | Liquid storage reservoir with capillary confinement The reservoir, usable more especially in a satellite, comprises a liquid outlet passage having a surface tension confinement device defining a buffer zone communicating with the outlet passage and, through orifices and a meniscus rupture zone, with supply... | 11/19/1985 |
| 4370716 | Active nutation control system for space vehicle An active nutation control system for a space vehicle spinning about a geometric axis has thrusters for creating an external torque about an axis transverse to the first. The amplitude of the nutation and its phase in relation with the spinning movement a... | 01/25/1983 |
| 4294420 | Attitude control systems for space vehicles An attitude control system is provided for a body-stabilized orbiting space vehicle having roll, pitch and yaw axes. Sensors carried by the vehicle provide signals representative of angular deviations about at least two of said orthogonal axes. An actuato... | 10/13/1981 |
| 4253518 | Cooling installation working through a change in phase (a) A cooling installation working through a change in Phase. (b) An installation wherein the chamber is connected to an expansion vessel through a valve calibrated at a determined opening pressure depending on the nature of the heat-carrier fluid and on the m... | 03/03/1981 |
| 4167887 | Control mechanism for droppable load A mechanical pull type control mechanism for a load launched or dropped from an aircraft comprises a flexible cord, one end of which is secured to the aircraft via a pull-away connection and the other end of which is connected to the load. A sheath secure... | 09/18/1979 |
