Novel glass elements for use in balances
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United States of America Patent
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Jun 6, 1989
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N/A
app pub date -
Jul 8, 1988
filing date -
Jul 8, 1988
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Expired
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Abstract
Improved shaped glass elements having very low thermal coefficients of elastic modulus are provided for use as measuring means in balances for determining the mass of objects with a high degree of resolution. A particularly preferred form of the invention id fabricated from a glass consisting of 60.6% SiO.sub.2, 14.7% B.sub.2 O.sub.3, 8.94% Al.sub.2 O.sub.3, 4.72% Na.sub.2 O and 10.98% BaO, by weight.
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