Duddell's devices | ||
Top-left: Duddell moving-coil oscillograph with mirror in oil bath. Top-middle: Rotating shutter and moving mirror assembly used with Duddell oscillograph, for placing time-index marks next to the waveform pattern. Top-right: Moving-film camera for recording the waveform. Bottom: Film recording of sparking across switch contacts, as a high-voltage circuit is disconnected.[1][2][3][4] |
William Du Bois Duddell (1 July 1872, in Kensington, London[5] – 4 November 1917, in Wandsworth, London)[6][7] was an English physicist and electrical engineer. His inventions include the moving coil oscillograph,[8] as well as the thermo-ammeter and thermo-galvanometer.
Hong
was invoked but never defined (see the help page).