Abstract: An improved method and related apparatus for linearizing and spanning of the output from transducer systems such as load cells and the like. The method and system provide for deriving a constant that only requires calibration at mid-scale and full scale loads. The constant can thereafter be used in equations which correct subsequent data for nonlinearity and span so that the transducer system displays data in absolute units for all readings from zero to full scale.

Abstract: Load cells for weighing scales are provided with integrally formed flexures for preventing extraneous moments from affecting strain gauges secured to the load cells. The load cell itself includes in its simplest form a rectangular shaped body having cut-outs defining load carrying upper and lower arms and a vertical leg. Recessed areas are provided on opposite sides of the rectangular body between the upper and lower cut-outs to define a shear web to which strain gauges are attached. Flexure webs formed between the cut-outs in combination with further flexure webs formed at one of the ends of the load cell body effect the desired isolation.

Abstract: The conversion is effected by adding equal and opposite reference voltages to the analog signal to provide two first output voltage levels. The voltage difference between these levels is converted into a first given number of pulses. The polarity of the analog signal is then reversed during the second half of the cycle so as to be subtracted from the reference voltages for providing two second output voltage levels. The voltage difference between these levels is converted into a second given number of pulses. A function of the first and second number of pulses provides a numerical count directly proportional to the analog signal and because of the bipolar operation; that is, the switching of the polarity of the analog input signal, all zero drift is eliminated.

Abstract: The scale includes a horizontal load plate and base plate supported in spaced parallel relationship by first and second generally rectangular load members lying in vertical spaced planes extending between the corners of the load plate and base plate. Opposite end portions of each rectangular load member are symmetrical about a vertical axis passing midway therethrough, these opposite end portions defining corner flexure supports connected between central body portions of the rectangular load members and end posts. The end posts connect to the load plate and the bottom of the central body portions of the members rest on the base plate. Each corner flexure support means includes specially designed flexure webs which will flex under a load on the base plate. Strain gauges attached to certain ones of the flexure webs provide electrical read-out signals constituting a function of a force applied to the load plate.