Weighing scales – Processes
Patent
1977-05-25
1979-02-13
Hartary, Joseph W.
Weighing scales
Processes
177247, G01G 126
Patent
active
041390687
ABSTRACT:
Method and apparatus for conversion of an uneven arm beam balance from metric weight measurement to English weight measurement, and the reverse conversion are described. An illustrative example is a balance rated to measure in kilograms and having a main beam scale graduated in uniform increments of metric weight with associated notched poises, a main weight being discretely positionable in respective notches. A secondary beam scale in parallel relationship with the main beam reads from zero to a value equal to one such metric weight increment, along which a secondary (slider) weight is slidable for making the fine-tuning weight measurements between respective graduations of the main scale. For conversion, there is also provided on the main beam a main English scale graduated in uniform increments of English weight with associated notched poise arranged so that a shift in the position of the main weight by a distance equivalent to 400N Grams weighs an increase of N pounds Avoirdupois. For performing a measurement in pounds the main weight is increased by 13,398% accomplished by combining an auxiliary weight therewith or by substituting a heavier main weight. A secondary English scale is also provided reading from zero to a value equal to one such increment of English weight and having a length 13.398% longer, or a slider 13,398% heavier, than for the secondary metric scale.
REFERENCES:
patent: 351528 (1886-10-01), Reynolds
patent: 403136 (1889-05-01), Pooley
patent: 1155259 (1915-09-01), Menz
patent: 3927725 (1975-12-01), Wood
Clare Richard D.
Sontheimer Carl G.
Cuisinarts, Inc.
Hartary Joseph W.
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