The Ancient Engineers |
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Página 122
... gear wheels , repre- sented by circles . This is the first mention of gear wheels . Our author does not say whether these are toothed cogwheels or smooth wheels in which rotation is transmitted by friction only . Presumably the friction ...
... gear wheels , repre- sented by circles . This is the first mention of gear wheels . Our author does not say whether these are toothed cogwheels or smooth wheels in which rotation is transmitted by friction only . Presumably the friction ...
Página 146
... gear , the rising float turned a shaft . By gear wheels driven by this shaft , " figures are moved , pillars are turned , stones or eggs let fall , trumpets sound , and other side - shows . " 27 Although Vitruvius says that Ktesibios used ...
... gear , the rising float turned a shaft . By gear wheels driven by this shaft , " figures are moved , pillars are turned , stones or eggs let fall , trumpets sound , and other side - shows . " 27 Although Vitruvius says that Ktesibios used ...
Página 167
... gear and a shaft , which projected through the side of the box and was doubtless furnished with a key or handwheel . This main wheel in turn drove twenty or more smaller gear wheels , some in complex planetary mountings . These gear ...
... gear and a shaft , which projected through the side of the box and was doubtless furnished with a key or handwheel . This main wheel in turn drove twenty or more smaller gear wheels , some in complex planetary mountings . These gear ...
Contenido
One The Coming of the Engineers | 1 |
Two The Egyptian Engineers | 18 |
Three The Mesopotamian Engineers | 46 |
Derechos de autor | |
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Términos y frases comunes
Agrippa Alexandria ancient aqueducts Arabs arch Archimedes architect Aristotle armor army Assyrian Athens Babylon became began brick bridge bronze builders building built Byzantine called canal castle catapults centuries China Chinese civilization classical columns conquered Demetrios dome early Egypt Egyptian emperor Empire engineering Europe feet fire Frontinus galleys gear Greek Hadrian Hellenistic Hence Herodotos Heron Heron of Alexandria High Middle Ages horse houses Imhotep India invention iron kings Ktesibios Lake land later Leonardo machine mechanical medieval Mediterranean Mesopotamia Mesopotamian Middle Ages miles mill modern Mongols Muslim Nemi ships oars palaces Persian Philon Philon of Byzantium Phoenicians piers pipes probably Ptolemaios pyramid Renaissance river roads Roman Rome roof rowers sail Sennacherib shaft ships side siege statue stone structure temple took tower Trajan treadwheel tunnel turned vault Vitruvius wall water clock water wheel wooden