Abstract: A drive mechanism is redundantly equipped with two electric motors so that the second motor can take over the drive function if the first motor should fail, for example for moving equipment in or on a spacecraft. Both electric motors are connected to a common drive shaft. A coupling device makes sure that the defective motor is decoupled from the drive train.

Abstract: A large screen image display device has a rear wall on which a plurality of striped vertical addressing electrodes are formed, a front wall to which a conductor and phosphor are laminated, and mutually spaced side walls to form an evacuated enclosure wherein the conductor and the addressing electrodes confront each other. Linear thermal cathodes are disposed in rows orthogonal to the addressing electrodes for emitting thermal-electrons. At least one modulation electrode is located between the thermal cathodes and addressing electrodes in parallel to the respective thermal cathode. Horizontal focusing deflection electrodes are arranged opposite to and in parallel to both sides of the thermal cathodes. A control circuit supplies control signals to the above mentioned electrodes for operating the device.

Abstract: A spark erosion machine tool is equipped with a drive head carrying, at an angle to its moving direction, a plurality of drive slides, with a stationary work piece holder, and with a plurality of movable spark erosion electrode mounting bucks. The drive slides (4) cooperate with the mounting bucks (20) for converting the movement of the drive head into a movement of the spark erosion electrodes. For example, when the drive head is a ring, its axial movement relative to a round work piece, such as a combustion chamber of a jet engine, is converted into radial movements of the erosion electrodes for plunge cutting cooling slots or openings into the outer jacket of the combustion chamber. Thus, many slots can be cut simultaneously. The movable mounting bucks (20) carry electrode holders (16) and the bucks are movably supported on guide rods (25) in the stationary work piece holder. The electrodes with their holders are guided in slots (14) of the work piece holder.

Abstract: A high performance propulsion thruster especially for the attitude and orbit control of space craft or flying bodies in space, is equipped with a heating-up device for the propulsion gas flowing to a nozzle. The heating device is constructed with at least two electrical resistance heating elements for increasing the reliability and the specific impulses. The heat generated by the at least two electrical resistance heating elements is applied to a gas guide conduit which is integrated with the heating device. The gas guide conduit is made of a high temperature resistant metal or of a ceramic material. The heating device, or rather its units are constructed as modular units, preferably integrated with modular gas guide conduits. Thus, a plurality of such modular units can be combined to easily satisfy the requirements regarding dimension of such units and regarding the specific impulse of such units.

Abstract: A laser warning sensor having a directional resolution capability based on a pulse frequency encoding of the directions at which laser light beams are received, is equipped with a plurality of light signal delay units. The directional or angular information is encoded by closed loop fiberglass light conductors, one of which is part of each light signal delay unit, each closed loop has a different length so that the respective signal delay signifies the respective directional information. The closed loop light conductors transform received light pulse signals into pulse sequences or pulse trains each having a given frequency. The respective frequencies are separated by filters in an electronic evaluating circuit which receives its input signals from a photodiode which receives the output light signals from all delay units.

Abstract: A method and an apparatus enable the application of a flux material onto a geometrically defined joint to be soldered.The flux material is first ultrasonically atomized in a pressureless or almost pressureless manner. Thereafter, the flux material mist is transported and applied to the joint to be soldered by a directed air stream.

Abstract: An aluminum alloy is melted and sprayed from a nozzle. Solid particles of silicon are sprayed by gas jet simultaneously with spraying of the aluminum alloy. Both the sprayed aluminum alloy and the sprayed solid particles of silicon are deposited and cooled.

Abstract: Distances are measured by a measuring element operating on an optical basis by sensing light reflections caused by the bending in unison of at least two parallel light conductors. The measuring element has two parallel photoconductors of different lengths extending from a sensor inlet of a carrier, e.g., in the form of a sheath. The effective length of each conductor is determined by a respective mirror at the effective conductor end. Through the introduction of light into the shorter photoconductor and by the bending of the light conductors, light is coupled over to the second photoconductor. The extent of bending is measured by ascertaining the intensity and travel time of the reflections from both conductors. A reflection only from the shorter light conductor indicates that there is no bending or deflection of the two light conductors and hence no distance is being measured.

Abstract: A plurality of separate projectiles is held together in a multiple shell or cluster shell, in the form of a stack. At least two parallel springy flat bands (7) extend lengthwise around the stack. The flat bands (7) are looped around the front end and the free band ends engage the rare end of the stack with hooks (9). A tensioning element engages and holds the hooks (9) and thus the bands (7) tightly to the stack. After the shell is fired the tensioning element is served, e.g. by a cutter (19) so that the flat bands (7) spring or flare open to release and distribute the separate projectiles. The release means is equipped to either cause release immediately after the shell has left the firing tube (4) or with a delay. A front end plate (16) and a rear end plate (17) may be arranged at the ends of the stack. Intermediate plates (26) may be arranged between adjacent projectiles.

Abstract: The feed advance speed, or rather its scalar value, of a turning cutting tool edge is varied for a time duration which is short relative to the time duration required for one full revolution of a work piece. The varying of the scalar value of the feed advance speed takes place at non-periodic timed intervals and at least once for each work piece revolution. Thus, a simple control not requiring any enforced phase relationship between tool movements during different revolutions of the work piece, can be applied to a computer numerically controlled machine tool, such a lathe for truing railroad wheels. A work piece surface is achieved which has at least the quality of conventional work piece surfaces produced with substantially more complicated phase controls for the tool movement. Positive chip fracture is also achieved.

Abstract: A conductor for a fuse has a main composition of a Pb-Ag alloy containing silver of 0.5 to 20 wt. % and lead and unavoidable impurity for the rest. A conductor for a fuse in another example includes a Pb-Ag-Cu or/and Te alloy obtained by adding copper or/and tellurium of 0.05 to 1 wt. %, respectively, to the above mentioned Pb-Ag alloy. Each of those conductors for fuses has a diameter in the range from 0.05 to 0.3 mm and it is used as a fuse contained in a capacitor of a tantalum chip for example. Those conductors for fuses have excellent pre-arcing time/current characteristics and good drawability.

Abstract: A broadband nonlinear drive control network for linear amplifiers with several amplifier channels has a first branch (Z1) with an adjustable amplitude limiter (A) connected to a signal source (S) through an impedance inverter (B), whereby an increasing impedance is produced at the signal source (S) when the limiter is activated. A variable resistor (C) is connected to the signal source (S) in a second branch (Z2). The resistor (C) begins to conduct only above an adjustable high frequency signal voltage. The amplitudes at the limiter (A) and at the resistor are tuned to each other so that the load impedance at the signal source (S) remains constant. Linear branch signal combinations provide the drive control voltages for the individual channels (K2 . . . Kn). A portion of the power output of the branch (Z1) directly drives the amplifier channel (K1).

Abstract: A laser warning receiver or detector for the detection of extraneous light not emanating from the laser to be detected. Thus, extraneous light is differentiated from incoming laser light. The laser radiation coming from a laser to be detected is detected on the basis of its time coherent radiation. Simultaneously, the wave length as well as the pulse form or shape are analyzed in spite of any presence of incoherent radiation components.

Abstract: Diesel engine exhaust gas is cleaned by burning soot to convert the soot into gas. For this purpose the exhaust gas from the diesel engine is caused to travel through a helical or spiral channel, whereby centrifugal force causes soot particles to collect on radially outer, inner circumferential channel surfaces, where the collected soot is combusted by heating elements reaching into these channels, preferably into channel pockets.

Abstract: A laser diode in the form of a chip with a heat sink connected to an electronic control circuit, is positioned in front of a light conductor for emitting light into the light conductor. The light conductor (103), such as a fiber (101) of a glass fiber cable (102), passes through a hole in the wall of a housing (100) for the electronic control circuit. The light conductor end is precisely adjusted in the Z-direction of an X-Y-Z-coordinate system, and rigidly held in the adjusted position in a bore or slot (17a) of a mounting block (17). The laser diode (10) with its chip (11) and its heat sink (12) are held in a roughly adjusted position in a milled recess (17c) of the mounting block (17) relative to the tip of the light conductor by a compression leaf spring (14) which permits an adjustment of the laser diode with its chip and heat sink in the X- and Y-direction for a precise adjustment. A displacement gripper tongue mechanism is then used for a precise position adjustment in the X- and Y-direction.

Abstract: In a method of manufacturing a cubic boron nitride p-n junction body, cBN seed crystals (1) of a first conductivity type are made coexist with original BN (3) and a solvent (2) containing a doping material of a second conductivity type, to grow cBN of the second conductivity type from the seed crystals (1). The solvent (2) contains 0.1 to 5 percent by weight of the doping material. The seed crystals (1) are disposed one by one in a plurality of blocks of the solvent (2), which blocks are separated from each other, to be in contact with nothing but the solvent (2). Due to such disposal, no spontaneous nucleation is caused in portions other than the seed crystals (1). A large-grained cBN p-n junction body is obtained as the result.

Abstract: The invention relates to a safety device for motor vehicles in the form of an impact protection arrangement, wherein the pot-shaped housing of the sensor for the activation of the ignition device of the gas generator, has a form fitting with the flange of the gas generator housing, and is attached to it in such a way that part of the gas generator housing is contained in the sensor housing, thereby forming an air gap which is electromagnetically shielded against interfering influences. An example embodiment is described and shown in the figures of the drawings.

Abstract: The amplification efficiency is increased in a system for linear amplification of signals, especially in satellite transponders, by connecting at least three amplifier impedance inverter units in parallel to each other between an input signal control network and a common load. The reactive loading of the individual amplifiers is compensated by shunt susceptances at the output ports of the individual amplifiers.

Abstract: The junction between two optical fiber light conductors is protected by a sleeve envelope which connects the protection coatings directly to each other. Tension resistent filler fibers are compressed by a shrink fit inside the sleeve envelope so that tension stress bypasses the light conductor fibers through the filler fibers. The sleeve envelope ends are shrink fitted to the protection coating. The highly tension resistant filler fibers, surrounding and bridging the junction, are tightly enclosed in the sleeve envelope by the shrink fit so that tension stress also passes through the filler fibers, thereby permitting the sleeve envelope to perform its protection function while the filler fibers provide the required strength.

Abstract: A gas generator for inflating a safety bag for the protection of persons in a vehicle, is equipped with a combustion chamber that is divided into a smaller section and into a larger section by a sheet metal insert. The sheet metal insert also divides the fuel into two portions, whereby a smaller fuel portion is located closer to the ignition openings of an ignition device while the larger fuel portion is located further away from the ignition device. The divider or insert provides a passage or gas flow openings which are so located that the combustion gas generated in the smaller section must flow entirely through the smaller section before it enters into the larger section. Thus, the smaller fuel portion is combusted substantially first and the larger fuel portion is combusted thereafter to provide an inflation characteristic for the safety bag such that the bag is initially filled slower and then rapidly.