Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 242
ar wheels that the moving blades or teeth of the disksactually turn. The barrel thus contains a double series of sirens very similar in principle toHelmholtzs double siren, only that the axis is horizontal instead of vertical. The holes inthe disks are cut around the periphery, and there are a… … •trie peiit^rator 224 DYNAMO-ELECTRIC MACHINES. saturateil. Hence, any increase of the E. M. F, of the dynamo increases the magnetismof the field-magnet. Above the yoke is pivoted a bent iron bar, which is attached to aspring siniihir to the hair-spring of a watch, so that tliis bar is mounted…
Mechanical engineering
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