Title: Electronic weighing device comprising a coupling assembly for a calibrating weight
Application Number: 200610114853 Application Date: 2006.08.09
Publication Number: 1920500 Publication Date: 2007.02.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01G23/01
Applicant(s) Name: Mettler Toledo AG Address:
Inventor(s) Name: Genoud Dominique;Koeppel Thomas;Emery Jean-christo
Attorney & Agent: wang yongjian
Abstract:
    The calibration weight arrangement for an electronic balance ( 1 ) with a force-measuring cell ( 6 ) has a calibration weight ( 14 ) which can be coupled to the force-measuring cell ( 6 ). A transfer mechanism and a drive source are used to move the calibration weight vertically, in order to establish, as well as to release, the force-transmitting contact between the calibration weight and the force-measuring cell. The transfer mechanism has at least one resetting element ( 122 ), a lifting system ( 110 ) configured as a knee-joint linkage ( 117 ), and a multi-stable positioning element ( 115 ). Due to the feedback from the multi-stable positioning element, whose first stable state defines the calibrating position ( 132 ) and whose second stable state defines the rest position ( 133 ) of the transfer mechanism, the actuator ( 118 ) is energized only during the phases when the transfer mechanism is moving.
Time: 15