Abstract: The invention relates to a device for welding cylinder-shaped and rotatable elements together. An axially displaceable electrode shaft (1) is provided in a rotatably seated pipe shaft (8). The pipe shaft (8) can be rotated with respect to the electrode shaft (1), and a connecting head (4) is provided on one end of the pipe shaft (8), which is equipped with gripper elements (5) for an interchangeable protective chamber (3). Gripper and positioning elements for a fastening cassette (31) provided for the parts (A, B) to be welded together, which is also interchangeable, are arranged in the protective chamber (3). The electrode shaft (1) extends through the connecting head (4) into the protective chamber (3).

Abstract: The determination of the active projectile velocity required for the correction computation and the correction of the disaggregation time (Tz(vo) are performed in a projectile after it has been fired. The velocity measurement takes place in the form of a measurement of a first time (t) which is required for a defined number of revolutions (Nm) of the projectile, wherein a velocity difference, which must be multiplied by a correction factor, is expressed by the actual projectile velocity and a lead velocity of the projectile by means of a time difference (t−tm) formed from the first time (t) and a predetermined second time (tm).

Abstract: The transmission of the disaggregation time takes place in the area of the conveying path of the projectiles (18) between a a magazine of the gun and the start of the flight path of the projectile (18), wherein the disaggregation time (Tz(Vo_typ)) is corrected by means of a delay time, which is a function of the selected transmitting point.

Abstract: The simulation system is used in the course of firing exercises, in particular with a laser beam, for simulating conditions which would arise if actual ammunition were used. For identifying a responder device (2), an interrogation device (1) transmits a coded radiation, which is detected in the responder device and is converted into electrical signals, which are supplied to a central unit (25) on the receiving end for transmitting identification messages back to the transmitting device in accordance with decisions made by this central unit (25). The interrogation device generates laser radiation or electromagnetic pulses or pulse bursts containing information which is coded in such a way that the response pulses being sent back by the responder device to the interrogation device additionally enable a central unit (15) on the transmitting end to calculate the distance between the interrogation device and the responder device.

Abstract: Method for calibrating the deviation of a received beam in a terminal from its desired position. The received beam reaches a receiving sensor, and an acquisition beam an acquisition sensor of the terminal. The detection range of the acquisition sensor is greater than that of the receiving sensor. A portion of a transmitted beam emitted by the terminal to the partner terminal is guided as an incident beam on the reflecting surface, where it is reflected as an outgoing beam. A portion of the outgoing beam is respectively brought to the acquisition sensor and the receiving sensor. A respective measurement for the acquisition sensor and the receiving sensor is performed at least approximately isochronously; the measured results are compared for determining the deviation of the received beam from its desired position. Also a device for calibrating the deviation of a received beam in a terminal from its desired position.

Abstract: Cartridges (5) are guided during a loading phase shortly before reaching the automatic cannon (1) onto a first track, which differs from the conveying direction of the conveyor chain (14) and are guided at a greater distance from the revolving drum (13) around the shaft (15) of the revolving drum, and conveyed on. In a firing phase, the cartridges (5) are guided shortly before reaching the automatic cannon (1) onto a second track, which differs from the conveying direction of the conveyor chain (14), are guided around the shaft (15) of the revolving drum (13), and are sequentially brought into a firing position directly behind the revolving drum. After having been fired and ejected, the empty cartridge cases (6) are caught and are transported on the first track into a magazine (4).

Abstract: In connection with this ammunition-feeding device, an axial transport device (19) with a conveyor chain (34) is provided between a conveyor (6) and a transfer station (20) for transferring cartridges (2) to a revolver drum (25) of a revolver cannon, by means of which the cartridges (2) are displaced in their longitudinal direction during transport vertically in respect to the movement direction of the conveyor chain (34). A buffer shaft (35) is provided for driving the conveyor chain (34), wherein the drive by means of the buffer shaft (35) takes place in such a way that, prior to being transferred to the transfer station (20), the cartridges (2) are brought into a buffer position.

Abstract: Anchoring of a spin-stabilized projectile with a sabot body is provided by grooves arranged on the fin-stabilized projectile, which are engaged by ring-shaped protrusions provided in an axial bore of the sabot body. The distance of the first protrusion from the predetermined breaking points of the sabot body and the height of the protrusions are selected in such a way that the deformation at the predetermined breaking points in case of assembly-related spreading of the segment lies in the resilient range.

Abstract: The service life of gun barrels of firearms with a high cyclic rate can be extended by means of the cooling device of the invention. To this end, coolant (7) is conveyed from a reservoir (6) into a pressure cylinder (10) by drawing up a hydraulic cylinder (13), while the feed line (14) to the gun barrel is closed. Thereafter the hydraulic piston (13) is moved in the opposite direction by a pressure reversal and the coolant (7) in the pressure cylinder (10) is placed under a defined operating pressure. Prior to triggering a volley, the feed line (14) is opened, so that the coolant (7) can flow via the feed line (14) and the nozzle (16) to the gun barrel (1). The coolant (7) is pushed back by the gas pressure respectively being created when a shot is fired, and following the lowering of the gas pressure to the operating pressure, it is again injected into the gun barrel (1).

Abstract: A system for operating a laser transmitting system for optical space communications, in particular in combination with the generation of amplified laser light under space conditions. The optical laser transmitting system here consists of a laser 2, acting as an optical oscillator, and an optical semiconductor amplifier 6 which are connected with each other by a polarization-maintaining optical fiber 4, or alternatively by an optical space connection. A light beam 8 exiting from the optical semiconductor amplifier 6 is converted via a special optical lens system 10 into a collimated light beam 12 with an even lateral extension and is radiated after further optical conversions.

Abstract: Material for a dental prosthesis consisting of fiber glass reinforced plastic. The material is used to produce a blank by means of a special injection-molding process, which can be worked by means of a machining process. A method and a device for determining the shape of a duplicate of a remaining tooth area to be provided with a dental prosthesis. The shape of the duplicate is determined, as is the shape of duplicate sections into which the duplicate has been divided, the determined data are stored and combined. A method and arrangement for producing a dental prosthesis. The shape of a duplicate (42) of a remaining tooth area to be provided with the dental prosthesis is determined by means of a shape determination device (110), the determined data are stored in the form of digital data (DD), and the dental prosthesis (143) is produced in a production machine (114), which is controlled by means of production data (FD).

Abstract: A lightweight, breathable garment which has radiopaque qualities and a method for making the radiopaque garment. In a preferred embodiment, a lightweight fabric, such as a cloth surgical mask liner (24) or an entire surgical mask (10), is impregnated with a lightweight radiopaque compound, such as a barium sulfate compound, to impart radiopaque qualities. Impregnation of the lightweight radiopaque compound can be performed in any number of ways including soaking the fabric in a solution containing the lightweight radiopaque compound, using the fabric as a filter in a passing solution of the lightweight radiopaque compound, placing the fabric in a reaction chamber between reagent solutions whose interaction will form the lightweight radiopaque compound and impregnating the fabric with one reagent and then exposing it to a complementary reagent whose reaction with the first reagent will form a lightweight radiopaque compound.

Abstract: The invention relates to devices for the quantum-optical amplification of modulated light, in particular in optical free-space communications systems. In the process a light beam (4) is conducted through a plurality of adjoining crystals (66), (68), (70), which are delimited from each other by means of polarization-selectively reflecting layers (104), (106). The light beam (4) is repeatedly reflected at the edge areas of the crystals into quarter-wave plates (86), (88), (90), (92), (94), and in the process its polarization is respectively rotated by 90 degrees.

Abstract: A device for the directional transmission and the directional reception of modulated light waves between geostationary satellites, or respectively geostationary satellites still close to earth, which have been constructed in a particularly weight-saving manner.

Abstract: The directional reception of extremely weak light signals without diverting a portion of the signal light into separate detectors for the purpose of obtaining an alignment signal is caused by the arrangement of several detector means (X, Y) which, when unmodulated light is superimposed on them, generate electrical output variables (x1, x2, y1, y2) which, after they have been added in a network (I), result in an information signal which, when it is linked by multiplication with several difference signals (x, y) formed in the network (I), converts them into narrow-band signals, which reproduce an alignment error.

Abstract: In order to achieve a considerable reduction of the outlay required on the ground in connection with the accurate calculation of the exact orbital position of each individual satellite of a constellation, first the exact orbital position of a preferably central master satellite of a sub-group of satellites embodied as a special formation is determined. This calculation is performed autonomously on board the satellite by means of customary measurements supported from the ground, or respectively by means of GPS, MANS, etc. Then the exact position of all other satellites in the same formation is determined from range and pointing data, which are provided by each IS link terminal. These pointing data are well known after the establishment of the inter- satellite link and are continuously updated.

Abstract: An apparatus and method are provided for deterring gaming machine theft and fraud by weighing the number of coins accumulated in a gaming machine hopper assembly (9). In one preferred embodiment, a coin weighing apparatus (12) consisting of a load cell (13) and internal strain gauge (18) is constructed integrally with the coin hopper assembly and fits between the coin hopper (10) and its base plate (14). In other preferred embodiments, the coin weighing apparatus (22, 43, 50) is constructed separately from the coin hopper assembly. In these other preferred embodiments, the weighing apparatus includes upper (24, 46, 52) and lower plates (26, 48, 60) which are separated by one or more load cell weighing instruments (28, 45, 56). In operation, the lower plate of this stand-alone weighing apparatus is typically placed against the bottom (8) of the slot machine and the hopper is then simply placed on top of the weighing apparatus' upper plate.