Abstract: A spring system for providing an elastic force between two machine parts, including concentric compression and tension springs disposed in parallel within a housing, with one pair of corresponding ends of the springs being connected by a movable coupling piece, and the other pair of corresponding ends being connected to a stationary stop and a connecting element, whereby a movable stop permits variation of the effective point of connection between the compression spring and machine part connected therewith.

Abstract: The invention relates to a mass flow meter which operates on the coriolis principle. The meter has two straight and parallel measuring tubes with two axially aligned compensating supply and discharge tubes arranged in parallel to the measuring tubes. The compensating tubes have approximately the same coefficient of expansion as said measuring tubes. A mounting member having supply and discharge passage has the juxtaposed ends of the compensating tubes connected thereto. The opposite ends of the compensating tubes connect to the respective juxtaposed ends of the measuring tube. An oscillator drives the measuring tubes in opposite directions and sensors are provided for detecting movements of the measuring tubes from which mass flow can be determined.

Abstract: A heat exchanger for transferring heat from a dust-containing gaseous medium to a second medium comprises a housing (3) with an inlet (1) and an outlet (5) for the gaseous medium, which flows along a U-shaped path around a partition wall (2) suspended from a top plate (4). The second medium flows along U-shaped pipes (6) in the U-shaped path from an inlet chamber (29) to an outlet chamber (28). Rapping cylinders (13), which are mounted on the top plate (4), periodically rap the pipes (6) to dislodge dust from the pipes into a discharge hopper (12). The top plate is mounted via resilient supports (31) on the upper edge of the housing (3).

Abstract: The invention relates to an electrical control unit for controlling the speed of a pump motor of a pressurized fluid supply system having a tank. A pressure responsive switch unit connected to the tank has at least three switch positions corresponding to pressure levels in the tank. The switch unit outputs three different voltage levels to a transistor and circuitry responsive to the three voltage levels utilizes this input to control the speed of the pump motor. The circuitry includes an integration capacitor and the effects of charging and discharging the capacitor in accordance with the three voltage levels produced by the switch unit are utilized for controlling the pump motor.

Abstract: When developing a coating such as for instance a light-sensitive exposed layer on a length or plate of material through ultrasonic agitation, the material is carried at a short distance or closely past a bar or a pipe extending substantially perpendicular to the advancing direction of the material and in the entire width of the coating. The bar or the pipe is caused to vibrate by a plurality of ultrasonic transducers while a developer is applied onto the coating adjacent the bar or the pipe in such a manner that the vibrations are transferred from the vibrating bar or pipe to the developer and to a stripe-shaped transverse area of the plate/the length including the coating. In this manner only the part of the developer having touched the ultrasonically agitated pipe or bar or already having hit the stripe of material currently developed is caused to vibrate by the ultrasonic transducers.

Abstract: An electromedical system comprising a temperature sensor which can be placed in the ear of a pig. According to the invention the temperature sensor is constituted by a substantially circular resilient element fixable in the auditory meatus, and which via a conductor, e.g. a wire is connected to an outwardly located transmitter capable of transmitting the temperatures measured to one or several receivers placed at a distance therefrom. As a result a current recording of the temperature of a pig can be performed. The construction of the sensor ensures close contact with the auditory meatus, at the same time while the hearing of the animal is not affected, and normal secretion can take place.

Abstract: In a cyclone for the cleaning of hot gases, the center-pipe (1) is produced of curved outer and inner elements (7, 8) which are made of fireproof material. The outer and inner elements (7, 8) are suspended in a self-supporting construction in upper end elements (2), and the lower edge of the center-pipe (1) is provided with lower end elements (14), in that the individual elements are suspended within each other by means of projections (9, 9), and the upper end elements (2) are suspended in a supporting structure (16) by means of anchoring devices (13) which cooperate with grooves in the upper end elements (2). There is hereby achieved a center-pipe (1) which is capable of withstanding high temperatures, and which can therefore be used in cyclones for the cleaning of hot gases.

Abstract: Formations surrounding oil wells, gas wells, injection wells and similar bore holes are treated by the injection of a microemulsion containing an acid solution. The main surfactant of the microemulsion is characterized by having at least two hydrocarbon groups attached to a nitrogen atom via a polar groups.

Abstract: The present invention relates to the novel compound of the following formula: ##STR1## as well as acid addition salts thereof, a method for the preparation of the compound of Formula I, and to the use of said novel compound in the preparation of the known antidepressant drug 1-(3-dimethylaminopropyl)-1-(4'-fluorophenyl)-1,3-dihydroisobenzofuran-5-c arbonitrile, or a pharmaceutically acceptable acid addition salt thereof.

Abstract: A laminated electrical heating foil element includes electrical resistance strips embedded between two sheets of insulation material to make the laminated heating element with its power supply terminal. The heating element is in particular adapted for horizontal floor mounting between adjacent floor joists, and each element may either be wider than the specified joist distance by approximately 2h, where "h" is the specified minimum distance to be left free above an installed element, or each element may be provided with fastening devices which may cooperate with complementary catching devices on the joists. Different fastening devices between joist and heating element, as well as easy-to-fold zones running along both side edges of the heating element, are included.

Abstract: The present invention relates to an apparatus for cleaning hazardous or toxic solid and liquid substances. The apparatus generally comprises a vacuum cleaner having a housing and an arrangement for drawing a fluid flow from an inlet to an outlet of the housing. A first filter is provided for separating and retaining both macro- and micro-particles of the substance entrained with the fluid flow. The first filter is arranged on a downstream side of the inlet of the housing and has a reservoir portion arranged below the inlet. Walls of the first filter permit outflow of substantially only vapors of the substance entrained in the fluid flow. A second filter for retaining the vapors is arranged fluidically between the first filter and the outlet. In a particularly preferred embodiment, the first filter includes a microporous filter membrane which is laminated to a fibrous support to provide a self-supporting unitary first filter for accomplishing the separation of the macro- and micro-particles of the substance.

Abstract: Production of a high purity concentrate of the antihemophilic Factor VIII (AHF) by precipitation of an aqueous solution of cryoprecipitate from blood plasma in a first step with such an amount of polyethylene glycol (PEG), preferably about 4% by weight, as will precipitate a substantial amount of the present fibrinogen, subjecting the fibrinogen-free solution to a second precipitation step with preferably about 12% by weight of PEG in the presence of a salting-in agent, such as an amino acid, in particular lysine or arginine, or a carbohydrate, and then recovering the precipitate with a concentrated content of the present Factor VIII. The obtained Factor VIII concentrate with a very low content of immunoglobulins and other plasma proteins has a solubility in an aqueous injection medium of 45 to 500 units/ml and a high specific activity of up to 50 units/mg protein.

Abstract: The present invention relates to novel amino alkyl substituted urea derivatives as well as their acid addition salts with pharmaceutically acceptable acids, to methods for the preparation of said derivatives and pharmaceutical compositions containing same, and a method for the treatment of tumors therewith.The novel urea derivatives have shown pronounced anti-neoplastic activity when tested against various tumor models in animals.The novel compounds of the present invention may be represented by the following formula: ##STR1## wherein X and Y are the same or different and are selected from the group consisting of a phenyl group, each of said phenyl groups being optionally substituted with one or two groups selected from halogen, CF.sub.3, OH, or alkoxy (1-4 C-atoms); and R.sup.1 and R.sup.

Abstract: The present invention concerns an assembly of pipes, particularly but not exclusively submarine pipes, adapted to permit disconnection of a tubular member therefrom while maintaining the interior of the remainder of the assembly isolated therefrom. The assembly comprises a first pipe provided with a first tubular connection portion for coaxial connection to a second tubular connection portion of a tubular member. The tubular member is also provided with a tubular extension which is coaxial with the second connection portion and houses a closure means. The end of the tubular extension is adapted to receive the casing of a manipulator for moving the closure means from the tubular extension into the first connection portion of the first pipe to isolate the first pipe from the tubular member and permit disconnection thereof.

Abstract: A power line/transformer switch of the isolator type, with knife members for the respective phases disposed on a common, rotatable shaft of insulating material. The respective contacts for the knives are disposed on an opposing, fixed shaft composed of insulating material. The respective shafts are mounted at one end of supports that are joined at the opposite end such that the supports constitute the legs of a V-shaped frame. The base of the V-formed supports is disposed perpendicularly on the longitudinal support bar that is parallel with the shafts, this longitudinal bar being provided with fasteners for attachment to a tower.

Abstract: An implement for levelling the surface of an agricultural field, a so-called furrow-smoother, comprises a plurality of rings of rotary knives to throw the surface earth laterally away from the higher areas. The rings of knives are journalled in bearings which are suspended from a carrier frame by means of arms that extend below the bearings and substantially tangentially therefrom so as not to catch plant remains (straw, stem, and root material) carried along by the two knife rings sweeping on either side of the bearing arm.

Abstract: Workpieces having three-dimensional surfaces can be efficiently sanded by rotatable sanding members mounted on spindles which are supported for movement in a circle of revolution over the surfaces of the workpieces as the individual spindles are selectively rotated about their longitudinal axes in either of two opposite directions during predetermined portions of each circle of revolution. A sanding apparatus for accomplishing this function includes a cone clutch arrangement for selectively reversing the direction of rotation in accordance with a cam directed control arrangement acting on pivotally supported yokes carrying the individual spindles.

Abstract: In the production of frozen moulds (12) or cores the freezing process is accelerated by drawing the liquefied freezing agent, such as nitrogen, used for freezing the water in the mould bodies, into or through the bodies by the application of a vacuum.

Abstract: A height adjusting device for machines or machine elements comprises three adjustment members positioned atop one another and together determining two sets of opposing surfaces. These surfaces allow a gyroscopic movement of the uppermost adjustment member, and the height of the height adjusting device can be adjusted stepwise, one of the two opposing surfaces in the first set of surfaces comprising one or more aligned supporting projections. These projections can cooperate selectively and tiltably with one or more recesses in a row of recesses in the second surface of the first set of surfaces. The depth of the recesses in said row of recesses varies stepwise. The surfaces of the second set of surfaces are provided with cooperating secondary projections and secondary recesses. The line on which the secondary projections are positioned forms an angle of substantially 90.degree. with the line on which the supporting projections are positioned.