Mettler Instrumente Ag

Diethelm Utzinger

Walter E Kupper

Max Baumgartner

Anton Bucher

A cantilever beam is located under the pan of the scale and carries a strain gauge bridge circuit. The beam has a bore perpendicular to its longitudinal axis. A rigid force transmitting arm is screwed to the free end of the beam and extends back so that a conical peg in the arm projects into the bore. The conical peg engages a rod which transmits a force from the load to be weighed. The beam has two arcuate recesses symmetrical to the bore on its underside. Strain gauge resistors are positioned so that their centers coincide with the thinnest, and therefore maximum bending sections of the beam.

Scale with cantilever beam strain measurement

One electrode each of at least selected ones of the segments of a seven segment liquid crystal indicator is connected to a test lead as well as an energizing lead. The voltage level of the energizing lead is compared to that of the test lead and an error signal is furnished if there is no correspondence therebetween. Where the seven segment indicator has a plurality of digits energized by a multiplexer, the electrodes of corresponding ones of the segments in each digit can be connected together and only one test lead is then provided for the so-formed set of segments.

Monitoring system for indicators utilizing individually energizable

Weighing apparatus of the electromagnetic load compensation type is disclosed including zero-position detector means for generating a position signal that is a function of the extent to which a loaded weighing pan or the like is displaced from its no-load position, and regulating means responsive to said position signal for generating a compensating current for displacing the weighing pan toward its no-load position, characterized by the provision of filter means connected between the zero-position detector and the regulating means for suppressing the undesired extraneous interference acceleration signals produced, for example, by external shock or vibration forces imparted to the weighing apparatus. In one embodiment, the filter electrical components are constant, and in a second embodiment, means are provided for varying the electrical characteristics of at least some of the filter components as a function of the load applied to the weighing pan.

Growing community of inventors

Zurich, Switzerland

Diethelm Utzinger