Abstract: The disclosed invention provides a flexible circuit board for use in surface mount technology. A polyaramid fiber reinforced resin provides a substrate for a copper cladding in which a circuit is formed. Overlaying the circuitry are a plurality of spaced insulating pads also reinforced with polyaramid fiber for dimensional stability. The spaces insulated pads define fold-lines along which the circuit may be folded, thereby providing a degree of flexibility required for flexible circuit applications.

Abstract: The present invention is directed to isocyanato isocyanurates prepared from diisocyanates which contain a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group which is bound to a tertiary carbon atom forming part of a cycloaliphatic ring system, said diisocyanate having an NCO content of about 20 to 50% by weight. The present invention is further directed to a process for preparing these isocyanato isocyanurates by catalytic trimerization and the use of the isocyanato isocyanurates in a process for the production of polyisocyanate polyaddition products, preferably two-component polyurethane stoving lacquers.

Abstract: Concentrated aqueous dye formulations of water-soluble organic dyes are prepared by desalination and concentration of corresponding crude dye solutions by means of membrane separation processes. The effectiveness of the membrane separation process on the one hand and the stability of the dye formulations on the other hand is improved if dye solutions are subjected to cross-flow microfiltration before and/or after the membrane separation process and insoluble constituents are thus removed.

Abstract: A memory assignment method used with a disk file management system operating with a hard disk memory wherein data is stored in appropriate ones of a number of discrete files on the disk, and each file has an assigned amount of memory space exclusively associated therewith for the storage of data that should be in the file. The disk file management system keeps track of how much of the memory dedicated to the exclusive use of each file on the disk is yet available for the storage of data in each file, and also keeps track of how much of the memory on the disk is yet available for storage but has not yet been assigned to the exclusive use of any particular file.

Abstract: A ring-shaped machine part of relatively hard material with an essentially cylindrical seating surface which has at least one ring-shaped milled section on which a machine part of relatively soft material with a corresponding seating surface can be seated coaxially in a form-locking manner. The milled section is provided on at least one axial end of the hard machine part and extends, starting from the cylindrical seating surface, to the end surface.

Abstract: The apparatus, provided for undersea work, includes a barrel holder, a barrel for guiding a fastener intended to be driven by the gases of a propulsive charge and a percussion system for setting off the charge. The percussion system includes a striker, a bolt for cocking the striker, a tumbler for releasing the bolt, a trigger for actuating the tumbler and a chamber having a liquid intake orifice and a suction orifice. The tumbler is movable in the chamber and the trigger, when operated, closes the intake orifice, pushes back the liquid and moves the tumbler thus allowing percussion of the charge. Upon return of the trigger into the rest and rearming position, the suction orifice makes possible to compensate the leaks in the chamber and to use the apparatus again.

Abstract: The invention relates to a process and a plant for separating low density material, in particular plastics, in particular with a density of less than 1, from substrate mixtures, preferably from waste material fractions or presorted garbage fractions optionally containing essential portions of plastics or optionally presorted to paper/plastics fractions, wherein a gravity separation, in particular a sink-float separation, is carried out and the low density material phase, in particular polyolefin plastics, is withdrawn and optionally further processed as a separate fraction after drying.According to the invention, the separating effect and the cleaning of the low density material phase withdrawn are increased by carrying out at least one centrifugal separation, preferably in a hydrocyclone, in addition to at least one gravity separation, preferably in a sink-float basin.

Abstract: The mower comprises at least two mowing groups 6, each of the at least two mowing groups 6 being composed of a cutting bar 8 equipped with cutting elements, the cutting bars 8 being connected to one another by a joint 9 and the mowing groups 6 being connected to the chassis 1 by a suspension device 12, 20, 18; 12, 20, 39. The suspension device 12, 20, 18; 12, 20, 39 comprises an intermediate structure 12 movably connected to the chassis 1 by a connecting device 18; 20, 39. Each one of the at least two mowing groups 6 is connected to the intermediate structure 12 by a joint 16 having an axis at least approximately perpendicular to the vertical plane containing the longitudinal axis of the corresponding cutting bar 8. The joints 16 are capable of movement in the direction crosswise to the direction of work 25 in relation to the intermediate structure 12.

Abstract: A spring-biased expansion band of metal bar members, attaches to a clasp member at one end and to a linear array of separately removeable and replaceable links at the other end to complete the bracelet. Each link has a pivot bar at one end and a complementary shaped aperture at the other end which engages the pivot bar upon an adjacent link. Size adjustment is obtained by user insertion or removal of one or more links from the band. The band and clasp member are electrically conductive at the bracelet's interior circumference, but electrically insulating at the bracelet's exterior circumference. A grounding cord connects to the conductive surface through a swivel and snap electrical connector at the clasp member.

Abstract: 4-Higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumyl)-azobenzenes are made by coupling the corresponding diazotized 4-higher alkyl-o-nitroaniline with the corresponding substituted phenol. These azobenzene intermediates are used to prepare the corresponding 2H-benzotriazole UV absorber stabilizers substituted on the 5-position of the benzo ring by a higher alkyl group, preferably tert-octyl or n-dodecyl.

Abstract: Dihydropyridine derivatives of the formula ##STR1## wherein the symbols R and R.sup.1 to R.sup.6 have the significance given in claim 1, have a pronounced calcium-antagonist activity and can accordingly be used as medicaments, especially in the control or prevention of angina pectoris, ischemia, high blood pressure and/or migraine.

Abstract: A non-contacting sensing method and apparatus is disclosed for positioning a surface, such as the surface of a workpiece. A collimated light beam is projected through a lens having a known focal length onto the surface. Suitable means such as a television camera is positioned to receive light reflected from the surface and provide a series of video pulses, wherein the number of pulses produced per television frame scan corresponds to the size of the light image focused onto the photosensitive element within the camera. The position of the surface relative to the lens is varied until the number of pulses produced per scan is at a minimum.

Abstract: A security and alarm apparatus has a pulse width discriminator circuit which includes: a monostable multivibrator having a trigger input connected to a data input of a flip-flop, a data output connected to a clock input of the flip-flop, and a pulse width control input; and a pulse width control circuit connected to the pulse width control input which causes a pulse produced by the monostable multivibrator to have one width when the flip-flop is in a first state and a larger width when the flip-flop is in a second state, the flip-flop producing at its data output a signal which is a logic high voltage when the frequency of an input signal at the trigger input has exceeded a first predetermined frequency and until it thereafter falls below a second predetermined frequency less than said first predetermined frequency, and which is a logic low voltage when the input signal has fallen below the second predetermined frequency until the input signal again exceeds the first predetermined frequency.

Abstract: A pneumatically operated fuel injection pump has a work chamber which is partitioned by a membrane into a pulse chamber and a return chamber. The pulse chamber is charged with crankcase pressure from a two-stroke engine while a counterforce is built up in the return chamber which varies with rotational speed. A counterforce is developed by means of a precise pressure control in the return chamber which makes possible a highly precise injection adapted to rotational speed. For this purpose, the return chamber is connected with an adjusting volume via a throttled flow path. In addition, a leaf spring is mounted in the return chamber and is utilized as a return spring for the membrane.

Abstract: A gap seal formed between surfaces cooperating with each other such that operation free of engagement between the cooperating rotor and housing parts with respect to each other at relative speeds occurs subject to a roughened light-metal surface of one part cooperating with a covering of foamed synthetic material on the other part so as to assure gap seal therebetween rather than having any metal-to-metal and/or foamed-material to foamed-material interengagement. The foamed synthetic material covering of a surface preferably is made of polyurethane and the light-metal surface is made of aluminum roughened by sandblasting or etching. The lightweight metal part can have cavities and recess spaces therein to be filled with foamed material as well as other fins, ribs, and anchoring provision for holding the foamed synthetic material bodies in place.

Abstract: This invention relates in general to the formation of films having a controlled molecular orientation prepared from rod-like extended chain aromatic-heterocyclic ordered polymers, and containing a binder in the micro-infrastructure. Such films have high tensile strength, modulus, and environmental resistance characteristics.

Abstract: Thermostable rutile mixed phase pigments of the ternary system titanium, antimony and chromium contain from 0.1 to 2.0% by weight of magnesium.

Abstract: Disclosed is a method and probe for measuring the direction and force of gaseous of liquid flows in which two dynamic pressures are measured which are built up in two measuring chambers under the influence of the flow at a certain free-stream angle or a plurality of dynamic pressures are measured which build up in a plurality of measuring chambers under the influence of the flow at a certain free-stream angle, and wherein from the difference or the quotient of measured dynamic pressures or from absolutely or vectorially added measured values, the direction and/or the force of the flow is determined through mathematic processing. The measuring chamber openings are rectangular-shaped or slot-shaped, the center lines of a pair of measuring openings are positioned in a plane, and the arrangement of the measuring chamber openings relative to each other is fixed. The probe can also be used to measure the force of the flow.

Abstract: The invention relates to a process for extracting nonpolar constituents from hops with simultaneous separation of residues of nonpolar plant protectives. In a first step the plant protective as well as other ingredients that are soluble under the chosen conditions are extracted with compressed gases, and in a subsequent stage the dissolved mixture is passed through an adsorbent and the plant protective is selectively removed from the mixture.