Abstract: A filter for aquarium operating in accordance with the lifting-lowering principle comprises a housing with at least one filter compartment for a filter material, a pump which aspirates water after passing through the filter compartment through a suction conduit and supplies the water back into an aquarium, at least one auxiliary chamber supplied with water and a float-controlled valve device controlling an outlet of the auxiliary chamber and communicating with the suction conduit, an auxiliary housing in which the auxiliary chamber is provided and supplied with water filtered after passing of the filter compartment in accordance with the principle of communicating pipes. A passage which is connected with the suction conduit has a valve opening which is alternatingly closeable and openable by a float-controlled valve closing member of the valve device.

Abstract: A container having a screw cap and a lower closure member to be connected to the container opening by a base member with a pouring spout connected thereto by an extendible bellows. The screw cap is adapted to be screwed onto and off the pouring spout. In order to render the closure childproof the pouring spout of the lower closure member, beyond its external thread, in a transitional region directed towards the bellows, carries a catch projection, which in the screwing-on direction comprises a gradually rising flank and merges into a steep flank. The cap side wall in the fully screwed-on position is in positive engagement with the catch projection and prevents unscrewing of the screw cap. By pressing inwardly the bellows in the region of the catch projection, the positive engagement between the screw cap and the pouring spout is cancelled and the screw cap is released for being unscrewed.

Abstract: A machine for producing braid or circular knit fabric has a withdrawal unit for the continuous product driven by a synchronous motor receiving its drive signal from a digital frequency converter. A pulse generator connected with the main motor of the machine produces pulses representing the speed of the main motor which are integrated and applied to a multiplier introducing the proportionality factor between the main drive and the withdrawal drive. That multiplier has an output which is applied as the input to the digital frequency converter.

Abstract: To prepare an essentially toroidal surface (7) on a workpiece (1) by machining, rotation of the workpiece around a first axis of rotation (3) and at the same time a rotation of the cutting tool (8) used for this machining around a second axis of rotation (10) are provided, wherein the second axis of rotation passes through the predetermined center (4) of the circular surface of the torus, which yields the surface (7) to be machined of the workpiece (7) during the rotation of the workpiece (1) around the first axis of rotation (3).

Abstract: A method of detaching fiber tufts from top surfaces of fiber bales which are set up in a fiber bale series along a travelling bale opener that operates with a vertically displaceable tuft-detaching device. The method includes the following steps: the bale height of all the bales of the series carried by the bale opener is determined by sensors; then data representing the bale height of the bale series, a vertical feed for the bales in the series having a minimum bale height and the determined bale height for all bales without feed change are inputted in a computer; then a proportionately higher feed for bales other than those having the minimum bale height is determined; and fiber tufts are detached from the top bale surfaces utilizing the predetermined feeds.

Abstract: An adjustable support column for use between ceiling and floor surfaces of a mine has an outer tube having an outer end braced against one of the surfaces and an inner end and an inner tube having an inner end in the outer tube at the inner end thereof and an outer end braced against the other surface. The tubes are coaxial to an upright axis and a wedge ring carried externally on the inner tube is tapered toward the outer tube and engageable in the inner end of the outer tube for resiliently resisting telescoping of the inner tube into the outer tube with a predetermined force and for permitting telescoping of the inner tube into the outer tube when the tubes are pressed axially together with a force greater than the predetermined force. Formations on the inner tube engage the ring for axially displacing the ring along the inner tube and fix the ring on the inner tube at any of a multiplicity of locations therealong.

Abstract: An electrical switch comprises a housing provided with at least one fixed contact part and one switching contact part, which moves in cooperation therewith. At least one actuating element is movably mounted in the housing. The actuating element influences switching positions of the switching contact part. Also disclosed is a camform which defines the switching positions and which interacts with a spring-loaded plunger associated with the actuating element in order to create operating forces. Moreover, a displaceable spring-loaded retaining device is disposed within the housing which enables the electrical switch to be held firmly in a locked position. Finally, at least one actuating element cooperates with a retaining device through a transfer device so that by use of increased force, the actuating element is brought into a functional position which does not correspond with any of the switching positions.

Abstract: A piece of textile goods is selvedged along an edge extending between ends of the piece by gripping a strip of the piece offset from the edge and displacing it parallel to the edge at a constant travel speed such that successive portions of the edge pass through a plurality of folding stations followed by a sewing station. The edge is folded over as it passes through the folding stations and the folded-over edge is stitched together in the sewing station. The portions are gripped in each station upstream of the sewing station as they pass through. To eliminate an out-of-square condition the gripped portion is advanced when it is adjacent one end of the goods at a speed that is greater than the constant travel speed, the gripped portion is advanced when it is adjacent the other end of the goods at a speed which is less than the constant travel speed, and the gripped portion is advanced when it is offset the ends of the goods at a speed which is substantially equal to the constant travel speed.

Abstract: The vacuum cleaner nozzle of the present invention has a nozzle body with a suction pipe connecting piece and a bottom plate which closes off the nozzle body towards the bottom, whereby the bottom plate is provided with at least one flow channel open towards the bottom to allow air to flow into a suction channel centrally connected to the suction pipe connecting piece, said nozzle body being provided with sealing or closing elements which surrounds the flow channel at least in part. The nozzle body and the bottom plate are made in the form of a one-piece supporting base into which the flow channel or the flow channels and the suction channel are directly molded. The sealing or closing elements in the form of bristle strips and/or sealing lips are molded directly into the bottom plate and/or are pressed, injected or glued into it. This design reduces the number of components of the vacuum cleaner nozzle considerably so that a significant simplification is achieved with respect to manufacture and assembly.

Abstract: A compressed gas weapon (10) is configured in the breech portion (18) of its barrel (12) to accommodate a projectile (24) in a position of readiness to fire and to reproducibly caliber the projectile (24) in the process of conveying it into the position of readiness to fire.

Abstract: The timber (2) passes in a direction of movement (3) between successive clamping roller pairs (27, 26), between which a test roller (48) imposes a flexible bending f.sub.D on the timber (2). The imposed flexible bending f.sub.D is maintained at least approximately constant by controlling a setting drive (70) by means of a computer (83). Any possible natural curvature of the timber (2) is measured by measuring elements (80, 81) and is taken into account. The thickness (d) of the timber is also measured without contact by measuring elements (81, 82). The restoring force is measured by a force measuring device (68) and the position of the test roller (48) transversely to the direction of movement (3) is measured by a distance transducer (77).

Abstract: The axis of rotation of a disc body made of rubber-elastic material is surrounded by a plurality of mutually spaced bushings and loop sets consisting of string loops which are wrapped around the bushings in pairs. Supporting rings are slipped axially on the bushings to hold the loop sets together axially. The supporting rings each comprise an annular disc having teeth which project radially inwardly and anchor firmly on the corresponding bushing. In this manner the greatest possible space in axial direction of the bushings is saved for installation of the loop sets, at a given overall thickness of the flexible disc.

Abstract: A furniture hinge (10) with a carcase-related part (12) which can be fastened adjustably on the carcase of a furniture piece, which is coupled to a door-related part by a linkage mechanism, and which is configured as a hinge cup (14) of metal. The cup part (18) of the hinge cup (14) can be mounted sunken in a mortise in the door and has a flange (20) lying on the inside of the door and projecting from the edge of the cup part. From the bottom of the flange protrude at least one, and preferably two, studs (32) provided with a number of anchoring ribs of pointed cross section, which can be mounted in associated, separate holes in the door. The stud (32) or studs are made expandable by a screw (30) in the manner of an expansion plug and are premounted on the flange by means of the screw being driven in only partially.

Abstract: An exterior rearview mirror for motor vehicles has a support member for connecting the rearview mirror to the motor vehicle. A mirror housing is connected to the support member and has a mirror support connected inside the mirror housing. The mirror support has a frontal opening for a mirror. The mirror housing together with the mirror support is pivotable relative to the support member from a position of use into a rest position. The support member is hollow and has a receiving element extending into the interior of the motor vehicle. In the rest position the mirror housing together with the mirror support is substantially folded into the support member.

Abstract: Special-steel alloys for high-load-bearing chains and corresponding chain parts containing portions of carbon, silicon, manganese, phosphorus, sulfur, chromium, molybdenum, nickel and aluminum. In order to impart a higher strength and toughness for this purpose to the special-steel an additional alloy proportion of tungsten is used in a given weight ratio.

Abstract: In a hollow bolt link chain of a conveyor device, in which at least one adapter is provided for affixing a carrier of the chain, which is detachably secured in a hollow bolt with an adapter foot, the adapter foot comprises at its insertion end at least one locking element adjustable in elastically resetting fashion between a holding position and a pull-out position, which engages behind a counter-catch at the hollow bolt at least in positive locking fashion in the holding position. At least one locking element adjustable in elastically resetting fashion from a holding position spread away from the longitudinal axis of the adapter foot in the direction towards the longitudinal axis is disposed at the insertion end of the adapter foot in an adapter for the detachable fastening of a carrier to a hollow bolt link chain of a conveyor device.

Abstract: An apparatus for depositing sliver from a sliver-producing machine into a coiler can in an annular pattern includes two cooperating pressure rolls for advancing the sliver; a rotatably supported coiler head arranged for receiving sliver from the pressure rolls and having a sliver outlet travelling in a circular path upon rotation of the coiler head; a movable coiler can platform disposed below the coiler head for receiving a coiler can in an upright position; a drive for driving the pressure rolls, the coiler head and the coiler can platform for advancing sliver from the pressure rolls into the coiler head and for depositing sliver by the circulating sliver outlet into the coiler can moved by the coiler can platform in an annular pattern; and a control and regulating device connected to the drive for altering the angular velocity of the coiler head within revolutions thereof as a function of momentary positions of the sliver outlet on the circular path thereof.

Abstract: A reciprocating piston engine, in particular a single-cylinder Diesel engine (2), has an air filter (1) in the suction pipe (3). To service the same, a pressure gauge (13) is arranged downstream of the filter cartridge (7), in the direction of flow. A check valve is provided at the measurement site or in the measurement pipe (12) between the measurement site and the pressure gauge (13).

Abstract: The pallet shelf system for/in a refrigerator ship has a number of bays (RZ), disposed on both sides of a shelf corridor (1) with a shelving vehicle (2) movable in the corridor, with channel-like supporting and running guides (3) arranged in tiers for pallets (4) to be set down on the guides and satellite cars (5) movable in them. On their lengthwise end remote from the corridor (1), the supporting and running guides (3) are assigned air ducts (6), which together with the supporting and running guides (3) and the set-down pallets (4) form an air circulation guide (LUF). Each of the bays (RZ), on its loading and unloading face end toward the corridor (1), is assigned one air lock (7) that closes the bay (RZ) over its entire height and is to be opened for loading and unloading.