Abstract: A collapsible convertible top or roof for motor vehicles has a linkage system including a front roof frame, a rear roof frame, a main roof arch, a two-part retaining rod supporting the roof arch against a tension bracket, and a linkage for displacing the roof frames and parts of the retaining rod between an extended position and a collapsed position. To assure stability of the linkage system with the convertible top in the extended or closed position, a locking mechanism is provided including a pivotal locking bar displaceable between a locked position and a released position by an actuating lever moved in accordance with the operation of the convertible top or roof. The actuating lever is mounted on one of two cooperating parts and pivots about an axis parallel to an articulation axis of the parts. A catch cooperates with the locking bar for securing the extended position.

Abstract: An improved automatic toll receiving apparatus of the throwing-in type installed so as to allow a driver sitting in an automotive vehicle to pay a specified rate of toll, which apparatus includes a large hopper into which the driver can easily throw coins, a determining mechanism for determining whether the received coins are true coins or false coins and discriminating the kind of coins, a counting unit for counting a value of the coins which are determined as true coins, a returning unit for returning to the driver the coins which are determined as false coins, a temporary coin holder for temporarily holding the coins at shortest for a period of time until a processing for the preceding vehicle is completed, so as to allow him to visually confirm the coins through a transparent side wall of the temporary coin holder by the driver while they are arranged side by side, and an actuator for rotating the partition of the temporary coil holder at the bottom thereof 45 degrees as to enable a processing for the nex

Abstract: A portable hand-held tool, such as a hammer drill or chisel hammer, includes a housing having a main vibration axis and a handle displaceably secured to the housing and movable toward the housing against compression springs. The springs have an axis of compression disposed at an angle to the main vibration axis. When the handle is displaced toward the housing, the spring is compressed. At the same time, however, the increased force of the spring is compensated by the increase in the angle of the spring relative to the main vibration axis. As a result, though the spring force increases, its component acting in the main vibration axis direction is reduced, and the spring force acting in the main vibration axis direction remains constant.

Abstract: A dental preparation is disclosed which comprises a (meth-)acrylate ester of the general formula whereinR.sup.1 is the same or different and represents a hydrogen or fluorine groupR.sup.2 is the same or different and represents a hydrogen or methyl group,a has a value of 0, 1, 2, 3 or 4,b has an average value of 2 to 30,n has an average value of 4 to 12 andm has an average value of 3 to 14.The preparation is, for example, suitable as relining material for dental prostheses.

Abstract: A constant velocity ratio plunging universal joint, comprising an outer joint member (101, 201, 301), an inner joint member (102, 202, 302), torque-transmitting balls (103, 203, 303) engaging in straight axis-parallel tracks in the joint members, and a cage (104, 204, 304) holding the balls with their centers in a common plane. There are further provided control members either in the form of radially disposed pins (105, 106, 305, 306) or smaller balls (221, 225) engaging further tracks in the joint members to control the axial position of the cage relative thereto. The further tracks engaged by the control members are not parallel to the axes of the joint members, either crossing one another in developed view of the joint or diverging from one another in longitudinal section of the joint.

Abstract: A guard intended to prevent hand-injuries against tear-bars has an elongated form (6) and extends parallel with a tear-edge and is moveable in a direction transversal to its longitudinal axis. The guard (6) has a length equal to the length of the tear-bar (2). The guard (6) is guided in a gap (5) defined between a strip-like (4) front side of the tear-bar (2) and an inwardly angled part of the wall (1) of the casing intended to accommodate, for instance, a paper-roll holder incorporating the tear-bar (2). For the purpose of limiting movement of the guard (6) between an outer active guard position and an inner inactive position, in which the tear-edge of the tear-bar (2) is exposed, there is provided along the guard (6) a rib (8) which abuts the free edge of the strip-like front side of the tear-bar in the outer position of the guard. The guard is displaced to its inner position in the gap (5) by the material web (P) when severing the paper-web against the tear-bar (2).

Abstract: Betain group-containing derivatives of carboxymethylcellulose are disclosed. They are characterized in that all or a portion of the carboxymethyl groups are or is replaced by groups of the general formula ##STR1## wherein R.sup.1 is hydrogen or methyl group,R.sup.2 is a divalent aliphatic hydrocarbon group with 2 to 5 carbon atoms,R.sup.3, R.sup.4 is an alkyl group with 1 to 4 carbon atoms,R.sup.5 is a divalent aliphatic hydrocarbon group with 1 to 10 carbon atoms,with the proviso that, on the average, at least 0.1 betaine groups are contained for each anhydroglucose unit of the polymeric molecule.Also, a method for the synthesis of these compounds and their use in cosmetic preparations, especially for the care of hair, are disclosed. In addition, novel derivatives of carboxymethylcellulose with tertiary amino groups are taught as intermediates. In these derivatives, all or a portion of these groups are or is replaced by groups of the general formula ##STR2## in which the substituents R.sup.1, R.sup.2, R.sup.

Abstract: Disclosed is a method of returning geothermal gases discharged from geothermal plants to the underground together with waste water through a return well, characterized in that the apparent velocity of waste water V.sub.eo relative to the return well is equal to or more than 1 m/s and the range of the apparent velocity of waste water V.sub.eo and of an apparent velocity of the geothermal gases V.sub.go is regulated to satisfy the following equation:V.sub.go <1.33V.sub.eo -0.41.

Abstract: A stethoscope includes a sound pickup and a reverberation chamber defined in a housing. The reverberation chamber is acoustically connected to binaurals through a connecting tubing. The reverberation chamber includes at least one sound inlet opening and the sound pickup includes at least one sound outlet opening, wherein at least one sound outlet opening and at least one sound inlet opening are arranged so as to be at least partially overlapping. The relative position of the at least one sound inlet opening and the at least one sound outlet opening is adjustable.

Abstract: A device, for cutting an undercut in a borehole at a location spaced from the surface of a material into which the borehole is formed, includes a housing (1) with a bore therethrough and a guide sleeve (2) rotatably supported in the housing bore and having an eccentric bore therein. A bushing (3) with an eccentric bore is rotatably supported in the guide sleeve bore. A drive shaft (7) is rotatably supported in and extends through the eccentric bore of the housing and has a cutter head (9) at one end. The drive shaft (7) can be shifted from a centered position within the housing bore into an eccentric position by rotation of the bushing (3) relative to the guide sleeve (2). In the eccentric position, the cutter head (9) can penetrate into and form an undercut in the surface of the borehole. A displacable snap-in element (16) in the housing (1) prevents rotation of the guide sleeve (2).

Abstract: A roll arrangement for the non-deforming treatment of moving web-type or strip-type products. The arrangement includes at least two rotatable rolls which are adjustable radially relative to each other. The arrangement is used, for example, for drying one or both surfaces of the product. The rolls are axially adjustable in opposite direction and each roll has slightly S-shaped or bottle-shaped contour over the entire length of the roll body, in such a way that the contours of two rolls arranged on both sides of a roll gap complement each other only in a certain relative axial position of these rolls. In other axial positions of the rolls, the roll gap becomes narrower either in the center or at the ends of the rolls, so that a uniform pressing action or other uniform non-deforming treatment of the product is possible over the entire width of the product independently of the bending of the rolls and/or deviations from the plane-parallelism of the surfaces of the product.

Abstract: A compact rolling mill for rolling sections includes rolling stands such as universal rolling stands and two-high rolling stands arranged along several rolling lines. Provided in the rolling lines are longitudinal conveyors for transporting the rolling stock along these rolling lines and cross conveyors for transporting the rolling stock between the rolling lines. At least two universal rolling stands are combined with one two-high edging stand to define a universal tandem compact group which together with further universal stands and two-high rolling stands may be displaced from one rolling position to another rolling position in a same rolling line or in a different rolling line. The drive unit is directly coupled to the stands along the outermost rolling line while the other remaining stands are indirectly connected to the drive unit transversely across the other rolling lines via other rolling stands.

Abstract: In an elevator brake that includes brake jaws acting on at least one bearer rope and a device for applying the brake, the speed of the elevator car is monitored by an impulse relay. This relay is connected to a pulse generator that includes a roller driven by the bearer rope of the elevator car. If the speed of the elevator car is too high, a switching signal applying the brake is given before an arresting device responds.

Abstract: A differential gear unit includes a viscous coupling for restricting the differential rotation of output gears (27, 29), with the conneciton of one of the parts (31) of the viscous coupling to one output gear being by way of a releasable connecting device so that the viscous coupling can be brought out of operation when required, e.g. under vehicle braking. The connecting device comprises a sleeve (1), coupling members (11) movable radially in the sleeve (1) to engage, when in radially outermost positions, groove (35) for torque transmission, and an actuating member (2) movable axially within the sleeve and operable on the coupling members. The actuating member (2) is movable by an axially displaceable positioning member (87, 49) through the intermediary of latching balls (68, 48) which are themselves radially displaceable to hold the actuating member in position without continuous application of a high force. The positioning member may be movable mechanically, electro-magnetically, or by fluid pressure.

Abstract: A hydraulic closing unit, particularly for injection molding machines which process plastics material. The closing unit includes a mold clamping plate which is slidably guided on guide columns between a stationary support plate and a stationary mold clamping plate. An annular main piston acts on the slidable mold clamping plate with a high mold closing force in mold closing direction. The main piston is axially slidably guided in the stationary support plate and load can be applied to both sides of the main piston. At least two coupling planes are provided between the main piston and the central pressure column. The coupling planes are mounted spaced apart and one behind the other in sliding direction of the slidable mold clamping plate. The main piston and the pressure column are slidable relative to each other over the distance range between the coupling planes.

Abstract: A sensor for measuring the activity of ions by means of ion-selective membranes (4) improves the measuring possibilities and reduces the dimensions of the sensor in that a plurality of such membranes are held in a common carrier (3) and are electrically insulated and protected against the penetration of moisture. Shunts (2) are provided in a sensor body (1) of the carrier. The carrier and sensor body are connected to one another. The invention is also directed to a method for producing such a sensor. Moreover, the invention is concerned with sensors and a respective arrangement for hemodialysis.

Abstract: A flexible shaft coupling including coupling flanges and a stack of sprinlastic membranes mounted at an axial distance from the two coupling flanges. The stack of membranes is mounted on sleeves which are arranged on tightening bolts mounted alternatingly on a circle on one or the other of the coupling flanges. Spacer washers are arranged next to the stack of membranes. Each sleeve is a hardened cutting sleeve provided with a cutting edge. The cutting sleeve is forced into the respective bore of the stack of membranes and at least a portion of the cutting sleeve is forced into the corresponding bore of the coupling flange. The cutting sleeve has an outer diameter which is greater than the maximum diameter of the respective bore of the stack of membranes and of the corresponding bore in the coupling flange.

Abstract: In an end housing of this type for the junction of cable harnesses surrounded by protective tubes to connectors, the end of a transition part facing the protective tube comprises a fastening element. The transition part is rotatably connected at least on one side to the tube or connector.

Abstract: A method is disclsed for surface improving sheet-like substrates to impart them with a marbleized effect. A transfer sheet is pressed on the substrate at elevated temperatures. The transfer sheet is comprised of superimposed layers of synthetic resin. The resin layer closest to the backing of the transfer sheet is devoid of pigments, while the resin layer adjacent the pigment free layer comprises 2 to 40% by weight, calculated on the amount of resin, of a flake-like pigment. The pressing of the transfer sheet against the substrate is carried out with a press tool devoid of surface pattern and having a generally flat press surface.