Abstract: A method of adjusting a blade (12) in its lowermost position while replacing a used one in a machine for cutting paper, cardboard, and similar stock. The blade is loosely attached to a blade holder that travels up and down. The blade can be loosened from the holder and raised and lowered therein. With the blade holder down, the blade can be adjusted by lowering it against at least one support (19 or 20) at the level of the stock being cut.The backing strip is removed from the stock-positioning board. The support is advanced out of a disengaged position and into an engaged, blade-adjustment, position. The blade holder, accommodating the blade loose in its raised position, is lowered into its lowermost position. The blade is lowered onto the support in its engaged position and secured tight to the blade holder in that position. The blade holder is raised. The support is returned into its disengaged position. The backing strip is replaced in the stock-positioning board.

Abstract: An overhead garage door arrangement in which a door leaf is moveable between open and closed position, and is installable against a ceiling for sliding up and down or that can be tilted or swung up and down for compensating against the weight of the door, at least one helical spring module is provided with a least two parallel-loaded helical tension springs that are arranged coaxially one within the other, and that are wound in opposite directions. The inner spring has an outside diameter which is smaller than the inside diameter of the outer spring. The oppositely wound coils of the coaxial springs cross each other. The two springs are pushed over a holding element which has a narrower first section for receiving the inner spring, and having a wider second section spaced from the first section for receiving the outer spring. The first and second sections of the holding element have edges with hook-shaped portions for grasping coils of the coaxial springs.

Abstract: A device for measuring wear in large roller bearings that have two bearing rings (1 & 2) with space accommodating the rollers (3) between them. The device has an indicator that indicates a prescribed deflection between the rings and a probe (9) that is accommodated in an opening (10) in the outer bearing ring (2) with the end (11) of the probe able to come into contact with one of the surfaces of the inner bearing ring (1). The object is a device that will provide accurate and reliable indications of bearing wear even after years of use, that will be simple in design, and that cannot be damaged or destroyed by outside forces. The inner bearing ring accordingly has a groove (12) facing the probe, and the end of the probe extends into the groove. The surfaces of the groove are as far from the end of the probe as the maximal permissible depth of the wear on the bearing.

Abstract: A transmission for a high-output two-shaft extruder, comprising a speed-reduction gear (1) and a distribution gear (2). The distribution gear has one take-off shaft (4) driven directly by the speed-reduction gear and another take-off shaft (5) driven by the first take-off shaft in conjunction with two distributor shafts (11 & 12), one on each side. The speed-reduction gear is a planetary gear, its sun wheel (21) driven by a main motor and its ring (27) by a superimposition motor, and its planetary bearing (25) coupled to the distribution gear's first take-off shaft. The main motor operates at a constant speed and is designed to handle most of the total power demand. The superimposition motor is regulable or discontinuously variable in speed and is designed to handle a fraction of the total power demand.

Abstract: A piston (3) for a hydraulic dashpot for motor vehicles, mounted on one end of a piston rod (1) and dividing a cylinder (5) into a two compartments (6 & 7), with two groups of lines (8 & 9) arranged more or less in concentric circles and more or less paralleling the piston rod and conveying hydraulic fluid in opposite directions, and with disk-shaped check valves, to some extent in the form of stacks (15 & 26) of cup springs, at each end that block one group of lines in one direction at a time, whereby the valve that blocks the inner lines (8) comprises either two separated springs (11), one above the other, or a stack (15) of springs, whereby the springs or stack nearer the outlet (10) from the inner lines maintain or maintains one cross-section open for the fluid to flow through, and whereby, when the pressure of the fluid increases, the spring or stack at the other end opens another cross-section for the fluid to flow through and the valve that blocks the outer lines opens intakes into the inner lines.

Abstract: An attachment between the frame of a grating in a special-purpose vehicle, an armored vehicle for example, and the lengths of structural section that comprise the grating. The ends of the lengths of structural section are secured against displacement by a plate. When the lengths of structural section have a metal core and a non-metal sheath, the core or part of the core is attached to and can or cannot be detached from the frame by way of the plate. The plate is positioned against the surface of the frame component that faces away from the lengths and is provided with cutouts (6) that provide access to the core of each length and allow the introduction of means (5 or 8) of attachment.

Abstract: A floor (2) of the device communicates with one or more ash-extraction pipes (3) associated with a semi-cooled conveyor. The conveyor is a drag conveyor (5) that travels over a semi-cooled floor (12) inside a housing (4). Several such semi-cooled floors are positioned one above another at several levels. The floors (12) at each level are divided into several tables (16) separated by slots (17) that extend across the direction traveled by the conveyor. The tables are mutually displaced level by level such that the rear end of every table is above the front end of a table in the floor just below it.

Abstract: A two-piece housing is provided with several bores (3, 4) which extend through the two housing sections (1, 2). Each bore (3, 4) is concentrically surrounded by a centering in each housing section (1, 2), which is in the shape of an internal centering in one housing section and an external centering in the other housing section. These bores (3, 4) are manufactured in each housing section (1, 2) together with the respective concentrically surrounding centering and in one process step with a drilling tool which includes two cutters (8, 9, 10) adapted to the diameters of the bore and the centering respectively. Subsequently, the housing sections (1, 2) provided with the bores (3, 4) and centerings are assembled in such a way that the centerings fittingly interengage. (FIG.

Abstract: In a process for the partial desalination of water, especially of drinking water, with a mixture of weakly acid cation exchangers and strongly basic anion exchangers, whereby the charged ion exchangers are regenerated by CO.sub.2 -containing water, if required, with the addition of CaCO.sub.3, CaCO.sub.3 /MgO, Ca(OH).sub.2 or the like. Simultaneous with the partial desalination, the organic carbon compounds present in the water are reduced, whereby the charged ion exchangers are intermittently regenerated with HCl, NaCl, NaOH, or a mixture of NaCl and NaOH.

Abstract: An articulated overhead gate for gate openings with particularly small drop heights between the upper edge of the gate opening that is to be closed and an adjoining overhead area or similar with a gate leaf consisting of several panels (3, 5) articulated successively in the direction of movement, which are driven by laterally arranged rollers (2) in first lateral roller rails (6), connected in an approximately vertical and thereby curved horizontal direction, excepting the upper panel (5) in closed position, which engages with its rollers (4) which, in this position, are arranged in the upper edge area (30), in second roller rails (7). Said roller rails are parallel to and located above the facing horizontal segments of the first roller rails (6), each segment having an end part (8) facing the gate frame, a first section (10) of which part is lowered only slightly in relation to the horizontal, and a second section (11) correspondingly inclining only slightly over 90.degree.

Abstract: The invention concerns a device for operating a mechanism (5) of a rinsing fixture, in particular for operating a closing and opening mechanism or a locking mechanism of a rinsing fixture. It shows a float (28) and a first hydraulic or pneumatic force means (15) that shows a regulating unit (16) that is controllable through a float. A second hydraulic or pneumatic force means (9), which has a regulating unit (8) that is connected hydraulically or pneumatically with the regulating unit of the first force means, has an active connection with the mechanism (5).According to the invention it is planned that upon rising the float, in opposition to a restoring force, drives the regulating unit of the first force means for operating the mechanism, that the float upon sinking is uncoupled from the regulating unit of the first force means, and that a valve (12) is arranged in the connection (11, 13) of the two force means.

Abstract: A sectioial overhead door is disclosed with a door leaf comprising several consecutive hinging panels (10, 10', 10") which are guided in the known way by rollers (11) in horizontal tracks and in tracks (12, 12', 12") joined to them to form a bow and are provided with a balancing device (15) in the form of approximately horizontal helical tension springs. The latter are designed to be space-saving, in particular with low drop heights, underneath the horizontal track sections extending into the building, such that on each of the outer side regions (27) of the horizontal track sections (12, 14) facing away from one another one or more helical tension spring units (16) are arranged approximately parallel to one another and one below the other. At least some of the helical tension spring units (16) consist of at least two coaxial helical springs (17, 18), the turns of which are mutually opposing and intersecting.

Abstract: An arrangement for displaying study aids together with textbooks, in which a horizontal supporting plate is mounted on vertical supporting plates or struts. A plurality of textbooks are stacked on the horizontal plate and are relevant to a specific field of knowledge to be learned by students. A plurality of study aids are located beneath the horizontal plate and within a volume defined by the horizontal plate as well as the vertical struts. The study aids are visible simultaneously with the textbooks to an onlooker when removing a textbook from the stack resting on the horizontal plate.

Abstract: A jack with a leg (1) and a supporting arm (2) articulated together by an articulation (3). The leg rests against the ground (5) by way of a foot (4). The supporting arm is articulated by another articulation (18) at the other end of the supporting arm to a load-support plate (19). The plate supports the vehicle as it is lifted by way of an innermost section (20) located preferably between the sill ridge (21) and the midline, and below the bottom (22), of the vehicle. The plate has a bodywork catch (25) with a bent-up section (26). The bent-up section comes to rest against the outside (23) of the sill (24) when the jack is used and is raised by a spring (28). Adjusting arms (9& 10) are articulated to the leg, to the supporting arm, and to each other, constituting a parallelogram linkage. One end (17) of the supporting arm projects beyond its articulation (7) to its associated adjusting arm (9).

Abstract: A disconnectable power-cable connector with a bus-shaped connection blade, in which a solid connecting member is wider at one end, and a matching wedge-shaped contact housing is open along one side. The connection member is fastened to the wedge-shaped contact housing in vicinity of the blade. A cable has an end that extends into the connecting member which is insertable into the contact housing perpendicularly to the longitudinal axis of the contact housing. A bar extends across the top surface of a receptacle for the connecting member, and rests on top of the connecting member after having been into the contact housing.

Abstract: A device (1) for switching electromagnetic equipment. It is especially intended for switching a direct-current brake for a three-phase motor (3) with a switching contact (6) with a rectifier (7) with integrated protective circuitry downstream of the switching contact. There is current transformer (5) upstream of the switching contact. The transformer's primary winding is part of a conductor in the line that provides a voltage.

Abstract: A ship drive with a drive engine and a propeller shaft which is directly connected therewith and provided with a propeller and the thrust of which is taken up by a thrust bearing, as well as an auxiliary drive consisting of an electric engine which is to operate selectably as a generator or a motor and which is connected with a transmission by way of a clutch in that a rotationally stiff, but axially pliant diaphragm coupling connected with the propeller shaft and the auxiliary bearing forms the play-free mechanically positive connection and in normal operation the auxiliary thrust bearing is clamped by means of pressure blocks against the flanges of the drive side and the thrust shaft.

Abstract: A method for biological purification of wastewater in which nitrogen phosphorous compounds are biologically degraded in a biotank. The biotank is operated with suspended activated sludge and with fixed film biomass for producing purified water that is directly removable from the tank. Oxygen input to the biotank is controlled and regulated for operating the tank under different oxygen environmental conditions. An aerobic zone is formed near the water surface of the tank, and an anoxic zone is formed near the bottom of the tank. At least one transition zone connects the aerobic zone and the anoxic zone. The method produces a total concentration exceeding 3 kilograms of dry solids per cubic meter of suspended activated sludge and fixed film biomass in the tank volume that is used.