Mettler-toledo Ag

Christoph Latzer

Dominique Genoud

The calibration weight arrangement for an electronic balance with a force-transmitting device (), includes a calibration weight () capable of coupling to the force-transmitting device (). The calibration weight () is moved vertically by a transfer mechanism and a drive source to establish and to release the force-transmitting contact between the calibration weight () and the force-transmitting device (). The transfer mechanism has at least one resetting element () and a lifting system configured as a knee joint linkage (). The resetting element () and the lifting system work together to arrest and cushion the calibration weight () if the balance is shocked, dropped or hit.

Electronic balance having a calibration weight arrangement

An electronic balance with a force-transmitting device () has a calibration weight arrangement (). The arrangement includes a calibration weight () capable of being coupled to the force-transmitting device (). It also includes a transfer mechanism and a drive source to effect a guided movement of the calibration weight (). The drive source has an actuator () that cooperates with the transfer mechanism and consists, at least in part, of a shape memory alloy. The actuator () moves the calibration weight () through a structural change of the shape memory alloy as a result of a temperature change.

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Pfäffikon, Switzerland

Christoph Latzer