Abstract: In a method of extracting motion errors of a carrier bearing a coherent imaging radar system from radar raw data, after calculating the entire azimuth spectrum (S(f,i)) and before correlation the azimuth spectrum is broken down over the entire bandwidth into n subspectra (S.sub.1 (f,i) . . . . S.sub.n (f,i)). Associated time-consecutive n subspectra of the two azimuth spectra are correlated with each other; by means of an expected frequency shift (v.sub.er) a window width is defined. From the curve (K.sub.0 (f,i)) obtained by correlation of the azimuth spectrum and from the subcurves (K.sub.i (f,i) . . . . K.sub.n,(f,i)) obtained by subcorrelations the maximum curve value within the window is determined.From the expected frequency shift (v.sub.er) and a just calculated frequency shift (V(i)) the new frequency shift (v'.sub.er) to be expected is determined. After simultaneous performing of the method steps described above over several strips of range gates (N.sub.

Abstract: The invention relates to a dimensionally stable, soft-rubbing adhesive stick consisting of a water-based preparation of starch derivatives and a soap gel as the shaping gel-forming component and, optionally, other auxiliaries. To obtain an adhesive stick which is largely based on natural raw materials and which may therefore be regarded as safe from ecological and toxicological standpoints, the invention is characterized in that viscosity-reduced starch ethers are present as the starch derivatives.

Abstract: A dishwasher equipped for single-phase alternating current connection, in particular a dishwasher for typical designated use in a household, includes a recirculating pump for wash water and rinse water with which items to be cleaned are acted upon under a spray pressure. A three-phase rotary current motor drives the recirculating pump. An electronically controlled single-phase AC/three-phase rotary current/frequency inverter impresses current on the three-phase rotary current motor.

Abstract: A valve device for use in an electro-hydraulic mining control system employs a cuboidal housing composed of two separate sub-housings. One sub-housing block has bores containing valve assemblies with cartridges which can be inserted into or withdrawn from the bores via an exterior face. Each cartridge is made up of two elongate sleeve components in screw-threaded engagement. The sleeve components define valve seatings and closure elements are guided in the components and engage on the seatings. A rod couples the closure elements so that when one closure element is on its seating the other is off its seating and vice versa. The closure elements are biased with a spring contained in a bushing fitted into the bore via the exterior face. The bushing is used to rotate the sleeve components relative to one another to adjust the relative position of the valve seatings.

Abstract: A valve block in a mine hydraulic system contains a non-return valve which is opened when a hydraulic control signal occurs to connect a pressure fluid feed or return line to a working chamber of an appliance such as a prop. A auxiliary valve is mounted in the block and is operated manually to relieve the working chamber even if the non-return valve remains closed.

Abstract: A mine roof support has a slidable extension at the front end of an auxiliary roof cap pivoted for swinging up and down on a main cap. To prevent the extension from being extended when the angle of inclination of the auxiliary cap is too high an insulative cylindrical block is fitted to say the auxiliary cap to partially rotate as the auxiliary cap pivots. A flattened region on the block supports a metallic plate and indexes as the auxiliary cap pivots. A resiliently-mounted proximity switch on the main cap senses the presence of the plate and produces a signal to prevent the extension from being extended.

Abstract: The invention relates to a distributor for controlling hydraulic distribution between hydraulic consumers of a mine roof support unit and hydraulic supply lines extending along a mine working. The distributor comprises a supply block provided with a plurality of pairs of main hose connections and a plurality of branch hose connections. The hose connections of each pair of main hose connections are connected by a respective main passage. Each branch hose connector is connected to a corresponding main passage by a respective branch passage. The supply block is provided with two sets of shut-off valves, the shut-off valves of one valve set being arranged in the main passages, and the shut-off valves of the other valve set being arranged in the branch passages. The hose connections of each pair of main hose connections are connected into a respective hydraulic supply line, and the branch hose connections are connected to the hydraulic consumers of the roof support unit.

Abstract: A distributor block for interconnecting a hose bundle to a control device of a pressure fluid control system in an underground mine working has internal passageways for connecting valves of the device to individual hoses. Bores in the block receive detachable elongate coupling members which themselves have internal bores and plugs for engaging in sockets within the control device. The coupling members are journalled in the block for slight transverse and angular movements within seals.

Abstract: A hydraulic coupling device is connected to a multi-line hose comprising a plurality of hydraulic lines housed within a flexible sheath. The coupling device comprises a cylindrical nut, a plurality of plug pins housed within the nut, and means for holding the plug pins within the nut. The plug pins are each connectible to a respective line of the hose. The holding means comprises a holding disc, a retaining disc, and a sleeve. The sleeve is connected to the sheath of the multi-line hose. Each of the plug pins is provided with a pair of longitudinally-spaced collars which define therebetween a peripheral groove. The retaining disc is provided with a respective aperture for each of the plug pins. Each of the apertures has a diameter which is slightly greater than the diameter of one of the collars of the associated plug pin. The holding disc is provided with a plurality of radial slots. The peripheral groove of each plug pin engages within a respective radial slot of the holding disc.

Abstract: A connecting device usable with hydraulic or pneumatic multi-line hoses in mineral mining has a block containing bores interconnecting bore-outlets formed on end faces of the lock extending perpendicularly to one another. The bore outlets are disposed on common pitch circles on the end faces at equal spacings. Detachable fittings mate with the end faces. One of these fittings holds plug-pins in identical sockets formed by the bore-outlets. The other of the fittings is coupled with a multi-line hose with similar plug-pins which locate in sockets formed by the fitting in correspondence with the associated bore outlets. Provision is made for one of the plug-pins of each group to serve as alignment means for the other components and the plug-pin of the one fitting and corresponding socket of the other fitting can be re-orientated around the pitch circles of the end faces at will.

Abstract: A mine roof support has hydraulic props mounted between a floor sill and a roof bar which can be raised and lowered by extension and retraction of the props. A goaf shield is pivotably connected to the rear of the roof bar and is linked via levers to the floor sill. A hydraulic piston and cylinder unit is connected between the roof bar and the goaf shield. Apparatus serves to prevent damage to the support components, and especially to the unit which could be extended beyond its full stroke when the props are retracted to bring the goaf shield and the roof bar more or less into alignment. The protective apparatus is composed of a compact valve device operated by a member, such as a cam, to block the props from hydraulic pressure when the goaf shield and the roof bar assume a pre-determined angular disposition. Both the valve device and its operating member are disposed in a protected position within chambers formed inside the roof bar and the goaf shield adjacent the pivot connection therebetween.

Abstract: A hydraulic coupling device for connection to a multi-line hose including a plurality of hydraulic conduits bunched together comprises a casing, a plurality of plug pins housed within the casing, and a holder for holding the plug pins. The plug pins are each connectible to a respective conduit of the multi-line hose. Each of the plug pins has a circumferential groove, and the thickness of the holder is greater than the width of the circumferential grooves in the plug pins. The plug pins are held in radial slots in the holder, the radial slots being so shaped as to retain the plug pins against axial movement with respect to the holder.

Abstract: A coupling device is provided for connection to a plurality of hydraulic conduits which are bunched together to form a multi-core duct. The coupling device has a casing which houses a plurality of plug pins, the plug pins each being connectible to a respective one of the conduits. A holder is provided for holding the plug pins, the holder being rotatably mounted in the casing. A connector, which is formed in two detachably interconnected parts, is also provided for connection to the coupling device.

Abstract: The air flow rate and the speed of an internal combustion engine are sensed and translated into pulse trains of variable frequency. During a time interval defined by the rpm related signal, a digital counter receives and counts the air flow rate frequency. Subsequently, the contents of this counter are counted out by a pulse train whose frequency is adjustable depending on other engine conditions such as start-up, warm-up, idling, full-load and the like. The apparatus also includes circuitry for generating a control pulse of minimun length.

Abstract: A sensing means is provided to monitor combustion of fuel and air supplied to an internal combustion engine, for example by sensing ignition pulses, combustion pressure, or cylinder temperature. Signals, as sensed, are evaluated and if one of these signals is beyond a certain threshold (e.g. extreme with respect to a set value, or with respect to an average of all signals) as sensed by threshold switches, supply of the combustible fuel-air mixture to the specific cylinder is interrupted.

Abstract: In order to efficiently irradiate a flowable material with high energy electrons, a hollow body is disposed in a container for the material and the material is caused to flow in the form of a thin layer across a surface of the body from or to the interior of the container while the material flowing across the body surface is irradiated.

Abstract: In order to efficiently irradiate a flowable material with high energy electrons, a hollow body is disposed in a container for the material and the material is caused to flow in the form of a thin layer across a surface of the body from or to the interior of the container while the material flowing across the body surface is irradiated.