Abstract: A device (10) for purifying a gas stream (30) made up of a plurality of DBD cells (12a, 12b, 12c) in series and, for each of the DBD cells (12a, 12b, 12c), a power supply (24a, 24b, 24e) for providing alternating current to each DBD cell (12a, 12b, 12e).

Abstract: In a weapons system of the type in which a round having a case is fired from a gun, the round including a fuze processor, the round further made up of a firing circuit having a resistor and also having two contacts in the case of the round, the gun having two contacts which contact the two contacts of the round when the round is in the gun and ready to fire, the gun being fired by applying a voltage in excess of a certain threshold to the contacts of the round via the contacts of the gun, the weapons system including a fire control system outside the gun.

Abstract: Method and apparatus for optimally decoding messages from CDMA signal sent by a plurality of users and received asynchronously at one receiver, using a minimal number of computations and minimal memory and processing resources. It is based on a novel approach to signal correlation, as well as to subsequent decoding by decorrelation, that requires a correlation period of only one symbol length, by providing for each user a pair of partial signatures sequences, with which the signal is correlated, deccorelating the results with the inverse of the cross-correlation matrix of all partial sequences, and combining the resultant partial symbol estimates--to obtain final estimated symbol values. The partial sequences are formed by separating each original sequence at a point corresponding to the estimated symbol boundary time, relative to an arbitrary correlation window, of one symbol length.

Abstract: A method for creating a surface having a fast changing temperature, comprises providing a heat exchanger coupled to an orifice opening into a jacket which is in contact with the surface to be heated and cooled, the jacket forming a reservoir capable of housing a fluid in contact with the surface to be heated and cooled, and providing two gas sources, each gas source being independently connected to the said heat exchanger, one source providing a first gas, which liquefies when it expands through the orifice, and the other gas source providing a second gas, having an inversion temperature lower than the temperature obtained by the liquefaction of the first gas, and causing the exhaust gas flowing out from the jacket, to flow through the said heat-exchanger to preheat or precool the inflowing gas, as the case may be, and further causing the said first and the second gas alternately to flow through the said heat exchanger and orifice, to cool or to heat the surface; means being provided for allowing and stopping

Abstract: A method for creating a surface having a fast changing temperature, comprises providing a heat exchanger coupled to an orifice opening into a jacket which is in contact with the surface to be heated and cooled, the said jacket forming a reservoir capable of housing a fluid in contact with the surface to be heated and cooled, and providing two gas sources, each gas source being independently connected to the said heat exchanger, one source providing a first gas, which liquefies when it expands through the said orifice, and the other gas source providing a second gas, having an inversion temperature lower than the temperature obtained by the liquefaction of the first gas, and causing the exhaust gas flowing out from the said jacket, to flow through the said heat-exchanger to preheat or precool the inflowing gas, as the case may be, and further causing the said first and the said second gas alternately to flow through the said heat exchanger and orifice, to cool or to heat the said surface; means being provided

Abstract: A cryogenic surgical apparatus comprises: a) a plurality of probes, each having a contact surface, each of which probes is suitable for creating fast temperature changes at the said contact surface; b) temperature generation means, coupled to each of the said probes, being capable of creating cryogenic and above 0.degree. C. temperatures at the said contact surface of the said probe; and c) temperature control means, to control the said temperature generation means.

Abstract: A flight control device is described for a flying object assembly. The assembly has a plurality of fins symmetrically disposed thereabout. Each of the fins is movable between a retracted position and an extended position. A support is provided for the flight control device. The flight control device further includes a frame for each fin which is connected to the fin by a pivot and is freely movable with respect to the support. The fin can be angularly displaced about the pivot. A main shaft is rotatably supported on the support and is coaxial with the axis about which the frame is movable. Also provided on the support, is a motor having a motor shaft. Included, are rotating means connecting the motor to rotate the main shaft. A guide is actuated by the main shaft and a follower which is carried by the fin engages the guide to angularly displace the fin about the pivot when the guide is actuated by the motor.

Abstract: A method and device for creating a surface having a fast changing temperature, comprises providing a heat exchanger coupled to an orifice opening into a jacket which is in contact with the surface to be heated and cooled, the said jacket forming a reservoir capable of housing a fluid in contact with the surface to be heated and cooled, and providing two gas sources, each gas source being independently connected to the said heat exchanger, one source providing a first gas, which liquefies when it expands through the said orifice, and the other gas source providing a second gas, having an inversion temperature lower than the temperature obtained by the liquefaction of the first gas, and causing the exhaust gas flowing out from the said jacket, to flow through the said heat-exchanger to preheat or precool the inflowing gas, as the case may be, and further causing the said first and the said second gas alternately to flow through the said heat exchanger and orifice, to cool or to heat the said surface; structure

Abstract: A device, particularly a missile, includes a body having an appendage, e.g., a wing, normally folded in an inoperative position and to be unfolded to an operative position when the body is accelerated in the direction of the longitudinal axis of the body. The appendage is pivotally mounted about a first pivot axis extending perpendicularly to the longitudinal axis of the body, and also about a second pivot axis extending parallel to the longitudinal axis of the body. The center of gravity of the appendage is outwardly of the first pivot axis in the folded condition of the appendage such that the acceleration of the body produces a moment pivotting the appendage about the first pivot axis.

Abstract: An electromagnetic pulse simulator includes two large-area electrodes mounted in spaced apart relation, and a high voltage generator electrically connected to the two electrodes to apply a high voltage between them. The electrical connection of the high-voltage generator and at least one of the electrodes comprises a plurality of electrical conductors in mutually-spaced relation with each conductor being enclosed within an insulating sheath filled with an insulating gas under pressure.

Abstract: Reactive armor elements each holding at least one reactive assembly of the kind in which an explosive layer is sandwiched between two metal plates, which is paired with a passive assembly comprising a layer of swellable material sandwiched between two metal plates. In each such pair the reactive assembly is outermost.

Abstract: A method of separating and feeding sheets from a stack comprises the steps of bringing a pick-up head into engagement with an intermediate portion of the top sheet of the stack while leaving the opposite ends of the sheet free, applying an air stream from each of the opposite sides of the stack and directed inwardly to impinge against the stack and to cause the free ends of the top sheets of the stack to separate from the underlying sheets, and moving the pick-up head with the picked-up top sheet away from the stack.

Abstract: A sheet feeding apparatus includes an edge aligning device for aligning an edge of individually fed sheets with respect to an underlying table. A tray overlies the table and has an upper sheet-receiving surface for receiving the individually fed sheets. An aligning member mounted to overly the tray includes an aligning wall having a knife edge lightly engageable with the tray. The tray is reciprocated by a reciprocating drive through a forward stroke positioning the tray to receive a sheet on its sheet-receiving surface laterally of the knife edge, and a return stroke moving the sheet-receiving surface towards the knife edge to move the sheet thereon against the knife edge, thereby to align the sheet therewith, and then past the knife edge while further movement of the sheet is arrested by the knife edge, thereby permitting the sheet to drop onto the underlying table.

Abstract: A method and apparatus for feeding sheets, particularly fabrics, from a stack comprises an arrangement for: engaging the opposite edges of the upper sheet of the stack by a pair of restrainer members, bringing a pick-up head into engagement with the upper sheet of the stack while producing air streams from the pick-up head directed outwardly across the opposite edges of the upper sheet of the stack, lowering the pick-up head to depress the stack below the restrainer members whereby the air streams cause the opposite edges of the upper sheet of the stack to curl upwardly to clear the restrainer members, lifting the upper sheet from the stack, and permitting the stack to rise so as to bring the next sheet into engagement with the restrainer members.

Abstract: A microstrip antenna comprises a first dielectric layer having a permittivity of 2.5-12.5 carrying the ground plane on one face and a feeder-resonator on the opposite face; a second dielectric layer thereover having a permittivity of 2.2-2.5 and carrying on its outer face a radiator electromagnetically coupled to the feeder-resonator; and spacing means spacing the second dielectric layer from the first a distance of up to seven times the thickness of the first, and providing a permittivity between the two dielectric layers which is approximately that of air. Matching of the antenna is obtained by varying the spacing between the two dielectric layers. The gain of the radiating element is better than 7.5 dbi for bandwidth of 15%. Sidelobe level is less than 15 dB in azimuth and elevation plan. The radiation pattern of the antenna is symmetric in both azimuth and elevation plan.

Abstract: A transverse electromagnetic (TEM) cell adapted for electromagnetic pulse (EMP) testing, comprises an adapter assembly at each of the tapered ends of the metal shielded enclosure for enabling the cell, including the connectors, to withstand the high voltage pulse of EMP testing while maintaining the continuity of the characteristic impedance. The adapter assembly at each end of the cell comprises outer and inner electrical conductors connected to the shielded enclosure and septum plate, respectively, and an insulating member which includes a first insulating section between the inner and outer conductors, and a second insulating section comprised of a plurality of inclined plates between the tapered end of the shielded enclosure and the septum plate. The adapter assembly at one end is to be connected either to an EMP generator or, with a slight modification, to a standard radio-frequency, continuous-wave generator; and the adapter assembly at the opposite end is to be connected to a load.