By Thomas G. Chondros (auth.), Marco Ceccarelli (eds.)

This is the ?rst quantity of a sequence of edited books whose objective is to gather contributed papers in a framework that could function a dictionary of names of people who've made contributions to the self-discipline of MMS (Me- anism and computing device Science). This dictionary venture has the peculiarity that, via descriptions of the tips and paintings of those contributors, the papers will illustrate in general technical advancements within the ancient evolution of the person ?elds that at the present time de?ne the scope of MMS. therefore the middle of every contribution could be a survey of biographical notes describing the efforts and reports of those humans. discovering applicable technical specialists as authors for such papers and - couraging them to write down them has been a problem; it's a not easy and time-consuming attempt to provide such in-depth articles that delve deeply into the historic historical past in their themes of craftsmanship. This ?rst quantity of the dictionary venture has been attainable because of the invited authors who've enthusiastically shared the initiative and feature hung out and energy in prep- ing papers that experience the unconventional features of survey and ancient notes. The papers during this quantity hide the large ?eld of the historical past of Mechanical Engineering with speci?c specialize in MMS. i feel reader who takes good thing about the papers during this ebook, in addition to destiny ones, will ?nd extra delight and motivation for her or his paintings (historical or not).

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Y augm. 1840. ) Review of Main Works on the Design of Mechanisms There are two main works of Betancourt that are related to the Theory of Machines. The first one is “Essai sur la composition des machines” which was co-authored with José Maria de Lanz and was published in 1808, constituting the first modern treatise on machines in which a classification of mechanisms appears based on the transformation of motion. The second one is reflected in “Mémoire sur une machine à vapeur à double effet”, presented to the Royal French Academy of Sciences in 1789, which contains a description of Watt’s double-acting steam engine together with the development of a method of path-generating synthesis applied to dimensioning of Watt’s mechanism.

Archimedes’ discoveries in catoptrics are reported (Lazos, 1995; Archimedes–Apanta, 2002). It is said that Archimedes prevented one Roman attack on Syracuse by using a large array of mirrors (speculated to have been highly polished shields) to reflect sunlight onto the attacking ships causing them to catch fire. This popular legend has been tested many times since the Renaissance and often discredited as it seemed the ships would have had to have been virtually motionless and very close to shore for them to ignite, an unlikely scenario during a battle.

To do this they had to maximize the potential energy stored in the torsion springs. Modern elasticity theory applied to the design of these springs tells us that the stored energy available will be proportional to the amount of initial tension given the bundle in stringing it through the frame, the additional tension caused by the pre-twisting of the bundle, the square of the angle indicating the amount of additional twisting by the pulling back of the bow arm, and the cube of the bundle’s diameter.

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