Abstract: Conventional electrical scales having independent weighing channels for a reference weight and the actual load with subsequent division of the resulting load signal by the reference signal to furnish the final output cannot furnish a final output signal independent of accelerating disturbances in a large critical frequency region, since changes in load change the dynamic behavior of the load channel. To substantially decrease variations in the final output signal due to such accelerating disturbances, the load signal is additionally coupled to the reference channel by means of at least one frequency-dependent network.

Abstract: A damping reduction suspension system is used in conjunction with a frequency dependent mass measuring unit to increase the accuracy and speed of mass measurement. The damping reduction system comprises a relatively low frequency suspension system coupled dynamically with a relatively high frequency mass measuring unit to minimize energy loss from the oscillating measuring element.

Abstract: An electronic weight measuring device comprises a load cell to produce a voltage signal corresponding to the weight of load applied, an amplifier circuit for amplifying the output signal of the load cell, an A/D converter circuit for converting the output signal of the amplifier circuit into a digital signal, a counter for counting the number of clock pulses corresponding to the output signal of the A/D converter circuit, a microcomputer for deriving a weight indicating signal from the count output signal of the counter, and a display unit for displaying the weight indicating signal from the microcomputer.

Abstract: A weighing apparatus having an evaluating device connected to the movement for determining the weight value of a load to be weighed from a series of continuously repeated weight measurements which includes a store or memory for the individual results of the weight measurements and a digital indicating device controlled thereby which shows that particular weight value from the measurement series, for which a certain minimum number of the latest consecutive individual results in the measurement series are the same.

Abstract: Apparatus for weight measurement comprising a wire mounted for tensioning by a weight to be measured, means for resonating the wire, means for measuring the frequency of resonation, at least one programmable read only memory (PROM) fed from the means for measuring the frequency of resonation and programmed to provide output signals indicative of the weight applied to the wire, and digital display means fed from said PROM.

Abstract: A scale with a digital computing device and a digital display, in particular for weighing bulk goods, in which the weighing result is determined as a mean value over a measuring cycle, comprising means for assessing the difference between the results of two consecutive measuring cycles, means for comparing this difference with a pre-determined value and means for controlling the length of the measuring cycles in function of this comparison.

Abstract: A load platform with multiple stress sensitive magnetic member supports is disclosed in which the frequency of an electrical output signal is proportional to the applied platform load. This device consists of multiple magnetic stress sensitive members in which mechanical stress is induced by the platform load and a magnetic multivibrator constructed so the stress sensitive magnetic characteristics of the stress members are the principal frequency determining elements of the magnetic multivibrator. Also disclosed are various stress member loading configurations, a laminated stress member, and methods for zero-load, linearity, and scale factor adjustments in the variable frequency transducers. Also disclosed is an adjustable frequency-sensitive switch which can be used as a load switch.

Abstract: A checkweigher uses a strain gauge load cell to provide a digital count which in turn is utilized to provide for automatic rezeroing and simplified referencing. The "grey zone" is taken into account for 100% rejection. Give away weight and standard deviation are also automatically determined.

Abstract: An electronic weighing apparatus, comprising a scale mechanism having a weighing plate for placing an article being weighed, a movable slit plate associated with the weight of said article on said weighing plate and having a series of slits equally spaced in the moving direction, a light source provided at one side of said slit plate, a photodetector provided at the other side of said slit plate opposite to said light source, whereby a pulse train is generated from said photodetector. The number of pulses in the pulse train is associated with the movement of the slit plate and thus with the weight of said article. A counter for counting the number of pulses of said pulse train for providing a weight value signal, a display register for storing the weight value signal, and a display responsive to the register for displaying the weight value in said register are employed.

Abstract: A mass and force meter comprising a frame, a load support, a digital evaluation and display device and two electrically-excited, transversely-vibrating, pre-tensioned strings each having one end fixed to the frame. The other ends of the strings are connected to a force distributor, and first and second transmission elements are provided for transmitting to the force distributor a pre-tensioning force and a force which depends on the load to be measured. One end of each of the transmission elements is fixed to the force distributor and the other ends are connected to the respective pre-tensioning and load forces. A guide member having one end connected to the frame and the other end connected to the force distributor acts together with the strings to guide the force distributor in a statically defined manner relative to the frame with respect to the pre-tensioning force and the force established by the load to be measured.

Abstract: A floor scale for measuring body weight having a scale base, a foot platform, an electronic digital weighing system for producing a digital display indicative of the weight applied to the scale platform, and a power switch for controlling the application of power to the electronic digital display system. A weigh cycle control is provided including a kick bar mounted on the scale base at one side of the scale for movement in a generally horizontal direction and adapted to be actuated by the foot of a person before mounting the foot platform, a momentary contact type switch mounted on the scale base for actuation by the kick bar and a timer operated by the momentary contact switch for maintaining the application of power to the electronic digital weighing system for a preselected time interval sufficient for a weighing operation.

Abstract: A force and mass meter using two transversally vibrating preloaded strings as the force sensitive members. The two strings are placed in a transverse magnetic field and are caused to vibrate by means of an exciting current flowing across them which is delivered by one exciter each. The exciters consist of a metering bridge, and an operational amplifier deriving the exciting current from the error signal measured across the bridge. Mutual interference of the two exciters is drastically reduced, when the point of common potential of the two exciters is connected with at least one conductor to each of the exciters.

Abstract: A weighing apparatus for measuring loads having a movement with one or more vibrating strings where the mechanical elements of the movement are non-adjustable and further including an evaluating device with arithmetic logic units for introducing constants into the evaluating device that can be adjusted during initial calibration of the apparatus to remove errors inherent in the movement.

Abstract: Highly accurate and versatile computing scale which is particularly suitable for postal use. The platform of the scale is mounted on and supported by a single load cell in a system requiring no levers, pivots or other moving parts. Weight readings are averaged on a moving average basis, and in one preferred embodiment the scale has an accuracy on the order of 1/32 ounce over a range of 70 pounds. With no load on the scale, any drift is cancelled by increasing or decreasing the net weight reading in small increments during successive counting cycles to maintain an accurate zero reference. The scale includes a keyboard through which a postal clerk can enter information about the destination and type of service desired, and a zip code to postal zone converter is included for automatically determining the postal zone from the zip code. Digital displays indicate the weight and postage to both the clerk and customer.

Abstract: A method and an apparatus is disclosed for measuring weighing and/or mass of an object. The object to be measured is subjected to an input frequency signal supplied to a piezoelectric crystal. Another piezoelectric crystal supporting the object is caused to vibrate in response to the input frequency signal and the mass and/or weight of the supported object. This second vibrating piezoelectric crystal will then produce a frequency output signal, whose amplitude is a function of the mass (and/or weight) of the object being measured. The frequency of the input and the output signals are substantially the same.

Abstract: Mass and force meter with a frame, a load-support and a measuring system, wherein the mass or force to be measured acts indirectly on the tension of two transversally vibrating, pre-loaded strings excited by electronic means, so that the resultant frequency changes serve for calculating the magnitude of said mass or force in a computing device, both strings, a first transmission element for the transmission of a pre-loading force and a second transmission element for the transmission of a force depending on the load to be measured being fixed to a force distributor guided in a statically determined way relatively to the frame by means of the two strings and of at least one guide with respect to the pre-loading force and to the force depending on the load to be measured. The force distributor comprises three parts forming a triangle, both strings, the guide and both transmission elements being fastened to the corners of the force distributor.

Abstract: A patient weighing system for automatically providing a visual display of stantaneous patient weight includes a bed assembly for receiving the patient which is supported by weight responsive means producing analog signals as a function of instantaneous total weight. The analog signals are converted to commensurate digital signals. A first storage register stores the digital signal representative of the weight of the bed assembly without the patient. A second storage register stores the digital signals representative of the total weight of the bed assembly including the patient. A difference digital signal is developed which is representative of the difference between the digital signals stored in the first and second storage registers, providing a net or remainder digital signal which is a function of patient weight.

Abstract: A mass and force meter having a frame, a load support and a digital computing device, a first and a second electrically excited, transversely vibrating string, first transmission elements transmitting the mass or force to be measured to said strings, second transmission elements transmitting a pre-loading force to said strings, so that the resultant frequency variations caused by the application of said mass or force are used in the computing and display device for computation of the magnitude of said mass or force, said first transmission elements having a first and a second branch, a first guide fixed to the frame, said first string having one end fastened to said frame and the other end connected to one end of said second string, to said first guide and to said first branch of said first transmission elements, a second guide fixed to the frame, the other end of said second string being connected to said second guide, to said second transmission elements and to said second branch of said first transmission