Abstract: The invention relates to a method, and to an arrangement, for optimizing the operation of a door closer at different phases of opening and closing of the door. The door closer is provided with a force transmission shaft (1) turning in accordance with the movements of the door and with a spring element (2) operationally connected thereto. The opening of the door takes place against the force of the spring element (2). According to the invention, at the closing phase of the door the energy of the spring element (2), exceeding the return force of the spring element (2) needed to accomplish the desired closing movement of the door, is recovered through simultaneous braking of the closing movement of the door for the main part of the closing movement. When the door is only somewhat open any more, preferably under 5.degree., a final force securing the closing of the door is accomplished by making use of said recovered energy.

Abstract: The present invention comprises a spray bottle in which the pressure resulting from the gripping force applied by the user is amplified and this increased pressure used in generating a spray such as an aerosol or fluid stream. In its preferred embodiment, the invention includes a high pressure chamber and a corresponding piston which is operative for driving fluid out of this chamber at high pressure through a spray nozzle and a low pressure chamber and a corresponding piston which is acted upon the hydraulic pressure within the bottle resulting from the gripping force. The low pressure chamber and piston are of larger size than the high pressure chamber and piston. The pistons are rigidly connected so that the force created by the pressure acting on the piston in the low pressure chamber is transmitted to the piston in the high pressure chamber where it is applied over a more limited area thereby generating greater hydraulic pressure for use in forming the spray.

Abstract: The invention relates to the cooling of a rotary kiln with a liquid cooling agent. According to the invention, the cooling agent is distributed to form an essentially even liquid blanket above the rotary kiln (1). In order to achieve this, a number of baffle plates (6) and/or nozzle pipes (9) is arranged at an equal height with respect to the surface of the rotary kiln (1).

Abstract: The present invention concerns a blade construction (10) for use in longitudinally cutting (in slicing) material webs, such as various paper and cardboard webs, films and recorder tapes, etc., with said cutter a material web being longitudinally parted into partial webs, the cutter consisting of a blade construction (10) comprising one or several blade pairs (11,12). On the edge (13) of a first blade (11), and similarly on the edge (15) of a second blade (12), has by grinding been produced a micro-rounding, and on the apex of the first blade (11) has been produced a bead (14). The radius (r) applied in micro-rounding is advantageously within 0.5-.mu.m, and the dimension of the bead is advantageously within 0.1-1 mm.

Abstract: A circuit for splitting a video signal into a chroma signal and a luminance signal comprises a resistor and a bandpass filter connected to the resistor. The bandpass filter passes a frequency component at the frequency of the color pilot burst. A chroma switch receives the frequency component passed by the bandpass filter, and is provided with a feedback transistor for reducing the input impedance of the chroma switch.

Abstract: The invention relates to a separating conveyor for separating solid materials from liquids. According to the invention, above the conveying path (17) of the conveyor and essentially supported against the conveying path (17) there is arranged a grate (1) which at least at one end is connected to the conveyor by means of elastic members (2). In addition to this, the conveying path (17) is provided with members (6) in order to guide the grate and the solid materials.

Abstract: The invention relates to a method, and to an engine for applying the method, for testing different substances, such as lubrication substances, cooling substances and/or fuels or the like, in a combustion engine, especially in a big diesel engine, which comprises at least two, preferably several cylinders. According to the invention at least for the part of one cylinder the supply and circulation of at least one substance is arranged separately and sealed from the corresponding substance systems for the other cylinders of the engine, and for the part of said cylinder the composition and/or some physical property, for instance temperature, of said substance to be supplied is changed in comparison with the substance to be circulated simultaneously in the corresponding substance system for the other cylinders in the engine.

Abstract: A sintered permanent magnet having the composition RE.sub.2 T.sub.14 B, where RE is a rare earth metal, T is a transition metal and B is boron, is treated by ion plating the magnet at an elevated temperature in the presence of a gas phase.

Abstract: Cabin unit arrangement for ships or the like comprising a number of cabin units located side by side on an even base, for instance on a ships deck. Said cabin units are separately mountable, whereby the self-supporting and box-like cabin unit comprises at least walls and a roof and is arranged for transport to the cabin mounting site at least mainly as a unique transport unit. Said transport unit is produced from at least two basic elements, whereby at least one external dimension of the transport unit is considerably smaller than the corresponding extension of the mounted cabin unit.

Abstract: An optical time domain reflectometer comprises a detector device for detecting optical energy received at an end of a fiber under test, an amplifier having an input terminal connected to the detector device, and a photoconductive switch connected between the amplifier input terminal and a reference potential level. The photoconductive switch is selectively illuminated.

Abstract: A contact protective circuit for a relay detects a transient in the relay operating coil and turns on a low resistance power MOSFET in shunt relation with the contacts before the contacts close or open whereby arcing or deposition of metal on the contracts is avoided. Timing circuitry is provided for controlling the MOSFET to conduct large direct currents for short periods of time. In one embodiment, a ramp up circuit responds to a voltage level in a control signal to drive the operating coil and power a DC-to -DC converter and a timing circuit. The invention provides for hot side switching as well as cold side switching of a load.

Abstract: A method and apparatus for decontaminating ground areas where toxic chemicals are buried comprises disposition of a plurality of spaced electrodes in the ground to be treated and application of a voltage across the electrodes for bringing about current flow through the ground. Power delivered to the ground volatilizes the chemicals which are collected and directed to a gas treatment system. The preferred form of the invention employs high voltage arc discharge between the electrodes for heating a ground region to relatively high temperatures at relatively low power levels.

Abstract: A system for painting images of stars and other objects on the interior surfaces of a room with phosphorescent paint utilizes a projector to project symbols on the surface to indicate locations of points to be painted. The projector is adjustable to accomodate rooim size and position of the viewer.

Abstract: A system for determining the thicknesses of thin films of materials exhibiting fluorescence in response to exposure to excitation energy from a suitable source of such energy. A section of film is illuminated with a fixed level of excitation energy from a source such as an argon ion laser emitting blue-green light. The amount of fluorescent light produced by the film over a limited area within the section so illuminated is then measured using a detector such as a photomultiplier tube. Since the amount of fluorescent light produced is a function of the thicknesses of thin films, the thickness of a specific film can be determined by comparing the intensity of fluorescent light produced by this film with the intensity of light produced by similar films of known thicknesses in response to the same amount of excitation energy.

Abstract: An electrode comprising a molybdenum rod is received within a conductive collar formed of graphite. The molybdenum rod and the graphite collar may be physically joined at the bottom. A pair of such electrodes are placed in soil containing buried waste material and an electric current is passed therebetween for vitrifying the soil. The graphite collar enhances the thermal conductivity of the combination, bringing heat to the surface, and preventing formation of a cold cap of material above the ground surface. The annulus between the molybdenum rod electrode and the graphite collar is suitably filled with a conductive ceramic powder that sinters upon the molybdenum rod, protecting the same from oxidation as graphite material is consumed, or a metal powder which liquefies at operating temperatures. The center of the molybdenum rod, used with a collar of separately, can be hollow and filled with a powdered metal, such as copper, which liquefies at operating temperatures.

Abstract: Apparatus for equalizing a soundfield comprises an amplifier and a gain control circuit for selectively adjusting the gain of the amplifier as a function of frequency in response to data values received by the gain control circuit. The apparatus has power supply terminals for supplying operating current from an external power source to the amplifier and the gain control circuit. In addition, the apparatus comprises an electronic storage device for storing data values and applying those data values to the gain control circuit. The stored data values are maintained in the apparatus upon interruption of the supply of operating current to the power supply terminals. The apparatus has an input port for applying data values to the storage device, and does not have manually actuable controls for selectively adjusting the stored data values.

Abstract: A four terminal ohmmeter apparatus includes circuitry for blanking the meter read-out in the event one or more connections to a device or structure under test have been improperly made. The voltage drop between current terminals is determined and compared with a threshold value. The voltage drop between potential terminals or between potential and current terminals, as caused by a separate a.c. source, is also determined and compared with a standard. Individual indicators inform the operator of the validity of each connection in order that corrective action can be taken if necessary. Voltage inputs are also utilized for ascertaining whether a correct meter range is being used and for changing the range if it is improper.

Abstract: The present invention constitutes a class of organometallic complexes which reversibly react with hydrogen to form dihydrides and processes by which these compounds can be utilized. The class includes bimetallic complexes in which two cyclopentadienyl rings are bridged together and also separately .pi.-bonded to two transition metal atoms. The transition metals are believed to bond with the hydrogen in forming the dihydride. Transition metals such as Fe, Mn or Co may be employed in the complexes although Cr constitutes the preferred metal. A multiple number of ancilliary ligands such as CO are bonded to the metal atoms in the complexes. Alkyl groups and the like may be substituted on the cyclopentadienyl rings. These organometallic compounds may be used in absorption/desorption systems and in facilitated transport membrane systems for storing and separating out H.sub.2 from mixed gas streams such as the produce gas from coal gasification processes.