THE HISTORY OF THE BALANCE
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THE BALANCE The early Egyptian scales consisted of a column with a shaft tied with rope at the ends, supported by rope path trays where the goods were placed and the other an agreed value weight. By 1500 BCE Egyptians, improved other aspects of this invention by adding a plumb line to check the leveling of the balance. |
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ROMANS While the Egyptian balances enriched the Mediterranean civilizations with the incorporation of elements such as the faithful (needle) to indicate the perfect balance between the plates, later on in 200 a. C. the Romans invented an instrument for weighing with a hook known as the Roman, which spread throughout this vast empire. The Roman had the originality of asymmetrical shaft, consisting of a small end hook which hung. The long commodity was used to place a fixed weight that could slide in order to graduate the weight. This same system has been the basis for developing the platform scales and scales used to determine heavy weights. |
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DA VINCI Y
ROBERVAL Another important step in the development of the balance was in 1699, when the French mathematician Gilles Roberval personified the invention. Its system of coupled parallel shafts, which actually defied the principle of the lever which governed the technology of the scales, allowing the plates located at a point which was mid way between the supports, allowing it to keep a horizontal plane or position without causing a displacement of the weights preventing any error in the accuracy of the balances. |
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