Abstract: A calibratable electromagnetically compensating precision balance having a weighing and taring device, in the form of a pan support, is provided with a parallel guide. The output from the balance is fed to an analog-digital converter which has its output coupled, via a minicomputer (calculator), to a display. A reference weight is provided for the balance. The reference weight is externally switchable for its weight determination, i.e., from outside the housing of the balance. A lifting mechanism is provided to lift the pan from the support. A method for compensating the parameters of the above-described calibratable electromechanical balance which can influence sensitivity and accuracy, involves determining and recording the actual value (M) of reference weight, under the prevailing operating conditions using the balance. Forming a quotient from the actual measured value (M) and the set (given) value (m) of the reference weight, the quotient being expressed in the form of a factor (F).

Abstract: A parallel construction, particularly for a top-loading balance with elecmagnetic force compensation, has two essentially identical, preferably trapezoidal, movable guides in parallel horizontal planes. The guides are mounted permanently at one end and connected together by a movable rigid connecting element at the other end. The two guides are displaced relative to one another in their planes at right angles to their axis of rotation.

Abstract: An electromagnetically compensating beam balance has a balance housing, a am and a fixed counterweight. Weight changing means, which change the weighing range (scale) by substitution, are provided on the load receiving side. A parallel guidance system is provided. Rods which accept only horizontal forces are coupled between a load carrier and the housing. Vertical flexure elements, which accept vertical forces, are coupled between the beam and the load carrier.

Abstract: An electromagnetically compensating force-measuring or weighing device includes a working coil disposed in the air gap of a fixed magnetic circuit which includes a permanent magnet. The working coil is subject to the influence of the load to be measured. An indicator responsive to the position of the working coil, has its output fed to a control amplifier, the working coil being fed the output signal from the control amplifier whereby it is brought to the zero position. An additional coil is connected electrically in series with the working coil, the magnetic field produced by the additional coil being determined by a measurement sensor. The output signal of the measurement sensor is a measure of the load to be measured.

Abstract: A method of producing signals for a damping control of an electric measurvalue indicator, especially an electromagnetic precision balance, having an active filter or impedance transformer located in a branch which filters out the a.c. voltage is disclosed. Transient signals in the form of a.c. voltages with different frequencies are applied to the output of the active filter or transformer in the noise range. Sequentially tapped values of the a.c. voltages are compared in the noise range with previous values. A circuit for producing signals for a damping control of an electric measured-value indicator includes a comparator connected with the low ohmage output of a filter or impedance transformer. The comparator is provided with a switchable voltage storage device to which a differentiating element and an amplifier are connected. When a.c.

Abstract: An electromagnetic, compensating force-measuring or weighing device having at least one working coil movable in an air gap of a magnet system. At least two members for temperature compensation are positioned at different, spaced apart points. The compensating effect of these members on the active part of the system jointly produce a temperature compensating value which is optionally approximately equal to the exact value of the actual temperature curve. The members may be in the form of a plurality of minute particles of nonretentive material having a high negative coefficient of saturation magnetization distributed in the active part. The members may be formed of the afore-mentioned material and be positioned on the active part or be PTC or NTC resistors so positioned.

Abstract: A beamless dynamometer or weighing device comprising a coil movable in the orking gap of a fixed magnet, the coil and magnet forming part of an electromagnetic compensation circuit for the dynamometer or device, and an arrangement for guiding movement of the coil within the working gap comprising an air bearing formed of a fixed guiding cylinder and an air-mounted slidable sleeve connected to the coil; preferably two coils are provided, each connected to a separate slidable sleeve, one sleeve being disposed inside the cylinder and the other sleeve outside the cylinder with the cylinder being formed of an annular jacket suppliable with compressed air which, in use, vents into the gap between the sleeves and cylinder, one sleeve being arranged to be acted upon by the force or mass to be measured and the other sleeve carrying a reference mass.

Abstract: Electromagnetically compensating weighing or dynamometer apparatus in which coil moves out of an equilibrium position relative to a magnet under the influence of a force, including a compensating circuit providing a compensation current proportional to the amplitude of the deflection, an a taring arrangement comprising a store and a digital/analog converter connected to the coil in parallel to the compensation circuit.

Abstract: A beamless dynamometer or weighing machine has a work coil positioned in a working air gap of a magnet arrangement. A pair of elastic links of trapezoid-shaped construction are attached to a bracing part. The median axis of the work coil is arranged within a trapezoid bounded by arms and sides of the links. The magnet arrangement is positioned in space bounded by the links.

Abstract: An electrical circuit for suppressing the effect of interfering alternating oltages of various frequencies superimposed upon a direct current signal in an electric measurand transmitter, such as in an electromechanical precision or fine balance, which comprises a signal line for carrying said direct current signal and interfering alternating voltages, means for low energy capacitively coupling-out of interfering alternating voltages of frequencies lower than a predetermined limit frequency from the signal line, means for energy amplifying and for inverting 180.degree. in phase said coupled-out voltages, and means for capacitively coupling-back into the signal line the amplified and inverted coupled-out voltages.

Abstract: A vibrating wire measuring instrument, such as a vibrating wire galvanometer, dynamometer, or strain gauge, wherein the wire which is to execute transverse vibrations is mounted between two fixing members, and node masses are rigidly attached to the wire so that the latter is subdivided into (a) two connection portions (between the node masses and the fixing members) and (b) an intermediate portion (between the node masses); the wire is of constant cross section and integrally formed; the node mass may be soldered or welded to the wire or clamped, e.g. in a detachable manner.

Abstract: A balance or dynamometer which comprises a coil in the work gap of an eleomagnet having a core provided with discrete groups of turns, the number of ampere turns in the groups of turns corresponding to the sequence or code values of a preselector code, the coil and electromagnet being disturbed from a predetermined position relative to each other under the influence of a force; such disturbance being recorded by a position indicator connected to the input of a forward/backward counter; means for arranging that the number registered in the counter at any one time connects an associated number of groups of turns to a constant current source connected to the coil; the coil and electromagnet returning to said predetermined position when the counter has connected an appropriate number of groups of turns to the constant current source to compensate for the disturbing force.