Electronic weighting apparatus with calibration weight arrangeme

Details Electronic weighting apparatus with calibration weight arrangeme Electronic weighting apparatus with calibration weight arrangeme

1991-07-08

1992-09-22

Miller, Jr., George H.

Weighing scales

With testing

177229, 73 1B, G01G 1952, G01G 308, G01L 2500

Patent

active

051488817

ABSTRACT:
Electronic weighing apparatus includes a main scale housing (1) within which is arranged a calibration weight housing (33, 133) containing a calibration weight (75, 175) operable between weight-applying and weight-removed conditions relative to horizontal projections (79, 179) that extend from load receiver (15) through wall openings (81, 181) into the calibration weight housing. The calibration weight is operable by a carrier member (57, 157) that is vertically movable by means of a pair of horizontally spaced wedge-shaped lifting members (39, 139) that are displaced toward and away from each other, respectively, by a spindle (41) having threaded portions (43a, 43b) of opposite pitch, which spindle is driven by a reversible motor (53).

REFERENCES:
patent: 3738439 (1973-06-01), Herbert
patent: 4425975 (1984-01-01), Luechinger
patent: 4566548 (1986-01-01), Sodler et al.
patent: 4766965 (1988-08-01), Luchinger
patent: 4932487 (1990-06-01), Melcher et al.
patent: 4977969 (1990-12-01), Leisinger et al.

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