1 In most situations the sailing boat is the stand-on vessel and the powerboat must give way. 2  If the sailboat is overtaking a powerboat, the powerboat is the stand-on vessel and the sailboat must give way. 3  Any boat with more maneuverability must give way to any boat with less maneuverability (see below). In most situations the sailing boat is the stand-on vessel and the powerboat must give way. 2  If the sailboat is overtaking a powerboat, the powerboat is the stand-on vessel and the sailboat must give way. 3  Any boat with more maneuverability must give way to any boat with less maneuverability (see below).
1832 - Hippolyte Pixii (France) built the first dynamo using a commutator, his model created pulses of electricity separated by no current. He also by accident created the first alternator. He did not know what to do with the changing current, he concentrated on trying to eliminate the alternating current to get DC power, this led him to create the commutator.
6. In a dynamo-electric machine, the magnetic frame composed of the cores c c c c, the curved pole-pieces N S, and the connecting-frame with the curved and outwardly-projecting legs e e, substantially as described. Signed by me this 12th day of January, 1886.NIKOLA TESLA.Witnesses: G EO.hat I claim isâ. 1. In a dynamo-electric machine, the armature constructed of iron disks of various diameters arranged upon the shaft in such a manner that a series of iron bodies is formed, each diminishing in thickness from the center to the periphery, substantially as and for the purposes set forth.