Electrical weighing scale
10 Assignments
0 Petitions
Accused Products
Abstract
An electrical weighing scale for measuring the weight of a user having has a substantially transparent platform, a plurality of supports, and a display assembly. Piezoresistive sensors, disposed in the supports, change resistance in response to a change in the weight applied to the scale. The piezoresistive sensors include piezoresistive elements arranged in a half bridge structure that has been calibrated to provide zero balance, span matching and impedance normalization. The sensors are coupled in parallel to a display. The parallel arrangements produces a composite output signal that enables any number of sensors to be used in the scales design.
138 Citations
0 Claims
Specification
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Current AssigneeMeasurement Specialties Limited (TE Connectivity Limited)
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Original AssigneeMeasurement Specialties Incorporated (TE Connectivity Limited)
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InventorsTasker, Richard E., Cappiello, Mark W., Germanton, Damon, Petrucelli, Steven P.
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Primary Examiner(s)Gibson, Randy W.
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Application NumberUS08/968,918Time in Patent Office502 DaysField of Search174/66, 174/67, 174/50, 174/135, 177/154, 177/155, 177/157, 177/199, 177/200, 177/210 R, 177/211, 177/229, 73/862.632, 73/862.634, 73/862.635US Class Current177/199CPC Class CodesG01G 19/44 for weighing personsG01G 3/13 having piezoelectric or pie...
