Calibration weight arrangement for an electronic balance

Measuring and testing – Instrument proving or calibrating – Dynamometer

Reexamination Certificate

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Reexamination Certificate

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11164795

ABSTRACT:
An electronic balance with a force-transmitting device (1, 101) has a calibration weight arrangement (4, 104). The arrangement includes a calibration weight (3, 103) capable of being coupled to the force-transmitting device (1, 101). It also includes a transfer mechanism and a drive source to effect a guided movement of the calibration weight (3, 103). The drive source has an actuator (16) that cooperates with the transfer mechanism and consists, at least in part, of a shape memory alloy. The actuator (16) moves the calibration weight (3, 103) through a structural change of the shape memory alloy as a result of a temperature change.

REFERENCES:
patent: 5148881 (1992-09-01), Leisinger
patent: 5866854 (1999-02-01), Emery
patent: 6194672 (2001-02-01), Burkhard et al.
patent: 6574958 (2003-06-01), MacGregor
patent: 6851260 (2005-02-01), Mernoe
patent: 195 09 177 (1996-09-01), None
patent: 203 18 788 (2004-05-01), None
patent: 59-090031 (1984-05-01), None

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