Abstract: Several load cell fixed beams transmit the weight of the useful load of a truck or a scale device from the useful load support to the base structure, such as a truck chassis, or a trailer chassis. The load cell fixed beam carries two compression sensitive strain gauges and two tension sensitive strain gauges connected in a Wheatstone bridge circuit to actuate a digital display. An amplifier or a variable gain amplifier can be provided to intensify the bridge circuit signal. Calibration controls can be provided for setting the readout of the useful load to zero, and further controls can alter the sensitivity of the circuitry to alter the ratio between useful weight and readout.

Abstract: A weight sensing pad includes two spaced apart load cells, each including a fixed end bending beam deflectable by vertical loads applied to the pad by the wheel of a vehicle and electrical strain gages for sensing beam deflection. The pad includes electronic control circuitry connecting the strain gages in a wheatstone bridge circuit, and providing calibration, zero, output, and bridge sensitivity adjustments. Two or more pads can be serially interconnected electrically with a remote electronic weight indicator.