Abstract: A compact balance with a system carrier including a vertical plate, with a balance scale carrier including a vertical plate, whereby the plane of the system carrier and the plane of the balance scale carrier are parallel to one another, with at least three guide rods which run vertically to the plane of the system carrier and connect the balance scale carrier in the form of a parallel guide to the system carrier and with a balance scale fastened in a hinged fashion to the balance scale carrier that a lever is mounted on the system carrier which lever extends parallel to the plane of the system carrier in the space surrounded by the system carrier and the balance scale carrier and that a coupling element connects the one lever arm of the lever to the balance scale carrier whereas a coil for the electromagnetic compensation of force is fastened to the other lever arm of the lever.

Abstract: An electronic balance with scale on top having a drive means for a magnetic agitator which integral onto the balance scale. This enables the work steps of agitating and weighing to be performed simultaneously and by the same device.

Abstract: In a method and a device for preventing or breaking down a filter covering layer during the filtration of liquids with finely distributed constitutents therein in a cross-flow operation in which the liquid to be treated is conducted in a narrow overflow slot (SP) between a filter surface (PM) and a slot limiter surface (FM), the slot limiter surface (FM) is brought adhesively into areal contact with the developing filter covering layer (DS) in a periodic manner by means of relative motion relative to the filter surface (PM) and the filter covering layer (DS) is removed in a rinsing fashion from the filter surface (PM) by reactivating the overflow slot (SP) and overflowing the filter surface (PM) and the slot limiter surface (FM). The movable wall is formed by a foil membrane consisting of plastic which is clamped on the edge in a sealing manner in a surrounding housing.

Abstract: An electronic balance with a housing, a balance scale, a wind guard which at least partially surrounds the balance scale and with a display and control unit approximately in the plane of the balance scale. The display and control unit is mounted to the hosing in a manner that it can pivot around the wind guard about at least one vertical axis. This allows the balance to better adapt to various work positions of the operator. Further possibilities of adaptation result from the weighing-area opening of a rotationally symmetrical wind guard which opening can be adjusted as desired and also from the possibility of laterally shifting the display and control unit and/or from the possibility of rotating it about a vertical axis within the display and control unit and/or from the possibility of tilting it about a horizontal axis.

Abstract: The invention relates to porous membrane filters, specifically mirco- and ultraporous membrane filters, which have fluid-impermeable areas as a result of a change of their structure on one side of the membrane to a film-like state (film-formation). These filters are, for example, very suitable for an assembly in filter cartridges according to the pouring method, because they still have on the side opposite to the filmed-up side a porous structure, which offers an ideal anchoring possibility for penetrating liquid resin.

Abstract: An electronic balance with scale on top and with parallel guide rods whereby corner-load errors can be corrected by means of the inclusion of at least one leaf spring which is fastened to a load receiver and is supported on the other end on a fixed point of the housing. The magnitude of the correction can be adapted to the corner-load error of the unadjusted parallel guide by means of the selection of the spring stiffness of the leaf spring and/or by means of its effective length.

Abstract: In an electronic balance with a scale on top with two guide rods which connect a load receiver to a system carrier fixed to the housing as parallel guide, with at least one translation lever which is connected to the system carrier by means of two springs and with a coupling element (9) which transfers the force corresponding to the mass of the weighed material from the load receiver to the shorter lever arm of the translation lever while the counteracting force imposes on the longer lever arm of the translation lever.

Abstract: An electronic balance with a calibrating weight circuit and with a digital processing unit for the automatic drive of the calibrating weight circuit that includes a proximity sensor is built into the balance and that the automatic drive of the calibrating weight circuit by the digital signal processing unit be blocked as soon as the proximity sensor emits an output signal.

Abstract: An electronic balance with a weighing scale which is connected via a parallel guide to a system carrier, and with a translation lever which is rotatably mounted on the system carrier and onto the shorter lever arm of which the force of the weight acting on the balance scale is transferred via a coupling element and on the longer arm of which the coil of an electromagnetic compensation of force is fastened, that at least one spring touches the translation lever for the purpose of astatization, the line of application of which spring passes through the point of rotation of the translation lever. This results in a compact design and a good efficiency of astatization. It is advantageous to use a wire or a band and/or a laterally jutting-out projection on the translation lever as spring.

Abstract: In a wound filter module with an areal or flat filter band with draining support and spacing band wound around a draining means, central hollow core (K), whose longitudinal edges are enclosed in a wound state in a sealing element (4,6,4',6'), the filter band and the spacing band (1,3) are connected, resting on one another in a coinciding manner, by their two ends to a closed, that is, endless band (B1, B2, B3, B4, Bn) which encloses a central hollow core (K) or a filter core (KB1; KB1,B2;KB1,B2,B3) with its inner side and which is wound around the latter in a spiral manner. Every further, closed filter band with spacing band encloses the particular filter element (K, B1) previously formed and is wound around the latter. The fluid to be filtered and also the filtrate obtained from the individual layers can penetrate both transversally as well as tangentially in the direction of the individual spiral windings (B1 to Bn) to the hollow core (K).

Abstract: In an integral filter (F) for separating fluid components which filter can be enclosed in a surrounding housing (1,2) with fluid connections (A1 l to A3, 10) the permeable tube jacket of which filter consists of several tubular filter elements (K1, K2) with different filter qualities whose cross sections are stepped in such a manner that a smaller filter element is surrounded by a larger filter element, optionally with formation of an intermediary space (Z1), and in which the two tube ends are enclosed by closure and connection adapters (15, 20, 21, 22, 27, 31) and can be adapted to fluid chambers (13, 14) of the housing, sections of the total filter (F) can be selectively tested for integrity, supplied with and emptied of fluid and filling substances via an intermediary space (Z1) between two filter elements (K1, K2) which intermediary space can be separately controlled and loaded from the outside.

Abstract: An electronic balance with a digital display for the exact display of the weighing result, with an quasi analog display for the estimated display of the balance (gross) load, whereby the a quasi analog display consists of at least one horizontal band of activatable points (7), and with a taring operation, that suitable activatable segments (8, 10) be located within, directly above or directly below the first horizontal band of activatable points (7) with which such suitable segments a "T" symbol (9) can be activated at a plurality of positions along the first horizontal band and that the "T: symbol be activated during taring at the horizontal position which corresponds to said tare weight on the horizontal band (7) of the quasi analog display while a horizontal bar formed by suitable activation of activatable points indicates gross weight. This makes it possible to display in a simple manner the relative position at which taring was performed.

Abstract: In a small filter with a one-piece plastic housing (1) manufactured with injection-molding technology in which a filter membrane (6) is located which is connected on its edge in a leakproof manner to the housing (1), the filter membrane (6) is covered at least on one side on the edge area (6") to be sealed by the injection molding which hardens in the injection molding form and is anchored in this injection molding.

Abstract: An electronic balance for dosing, with a measured value receiver, a digital signal processing unit, a digital entry keyboard for entering the theoretical value of a dosing, with a theoretical-weight memory and with a digital display unit with several positions after the decimal point, that switching means are present which determine the highest-value decade in which a number in the display is not equal to zero and that these switching means regulate the decoding of the display in such a manner that all zeros to the left of this decade up to the units decade are represented as a small zero "o" whereas prezeros in the 10 decade, 100 decade, etc. are entirely suppressed in a known manner. This makes possible a quasi-analog representation of the measured value which is attained in the units decade, the 10 decade, the 100 decade, etc. by means of the known suppression of prezeros even in the case of balance displays with positions after the decimal point.

Abstract: In high-resolution electric balances a certain residual temperature coefficient remains even with a good correction of the temperature-dependent errors of the measured value sensor. The invention therefore is with respect to a balance with a built-in calibrating weight (standard) which responds with a new calibration switching in said calibrating weight if a given temperature changes has been exceeded since the last calibration. To this end, the balance comprises in microprocessor digital signal processing unit a separate memory area in which the output signal representing temperature value of a temperature sensor is stored during the calibrating process and also comprises a comparator which upon instruction compares the instantaneous output signal of the temperature sensor which the value stored in this separate memory area. If this difference exceeds a given amount, a signal element indicative of need to recalibrate using the calibrating weight is actuated.

Abstract: A drying balance is disclosed with a means (11) for supplying energy for the drying of material to be weighed located on the balance scale (6,16) and with a digital evaluating unit (23,24,25) for calculating the moisture content from the measured weight loss of the specimen and for determining the end point of the drying in which balance the digital evaluating unit (23,24,25) calculates the inflection point from the chronological course of the weight loss and derives the criterion for determining the final point therefrom. The criterion for the final point consists in that the slope of the drying curve drops below a certain value which is derived from the coordinates or the slope of the drying curve at the inflection point.

Abstract: In an electric precision balance with scale on top, protected against the penetration of foreign bodies and with a low-displacement measuring system (1), a parallel-guided balance scale carrier (3) for a balance scale (11) which is guided without contact through a housing opening (4) of a surrounding system housing (2) or protective cap, the balance scale carrier (3) is designed for its part with its part running upward outside of the system housing (2) as a protective hood (8) which covers the system housing (2) at least at the top and the sides and which comprises receiving bearings (9) at the low edge (8') for intermediary members (10) which support the balance scale (11), said intermediary members are surrounded without contact by casings (12) which form foreign-body baffles open at the top and the bottom which are a component of a general housing (7) surrounding the system housing (2) and said general housing comprises drainage openings (17,17') located in its low bottom parts.

Abstract: A multilayer filter medium (6) is used for separating precipitates containing cholesterol from blood plasma which consists of at least one open filter medium (7) which adsorbs precipitate and of a microporous membrane (9) which controls the pressure conditions in the filter element, whereby the layer (7) which specifically adsorbs the precipitate is hydrophobic and the microporous membrane (9) is hydrophilic. In addition, a positively charged adsorption medium (9) is provided on the side of the microporous membrane (8) facing away from the hydrophobic adsorption medium (7). In this manner, a large adsorption area is created and kept accessible for the precipitates and for heparin.

Abstract: Solar cells (5) for the supply of electric energy are located in an electronic balance in a manner suitable for the requirements of the balance and storage means for storing the electric current generated by the solar cells (5) are present. The solar cells (5) are located, for example, in a folding cover (7) which protects the balance when it is not in use and which is folded up at the start of operation. In addition, a display (9) for the state of charge of the storage means (76) is present.

Abstract: The invention suggests for an electronic balance with a balance scale (1), with a parallel guide for the balance scale (1), with at least one sensor which measures the torques transferred from the balance scale (1) to the parallel guide, with storage means in the electronic circuitry of the balance in which means the magnitude of the corner-load inaccuracies of the parallel guide is stored in the form of corner-load correction factors and with switching means or program parts in the electronic circuitry of the balance which correct the weight value outputted from the measuring system on the basis of the output signals of the sensor or sensors and of the stored corner-load correction factors that controllable signals (10-13) are provided which designate the corners and sides of the balance scale (1). The signals can be formed by light sources adjacent to the balance scale (1) or in the corners or on the sides of the display field (9).