h rotates with the which drives the ribbon shaft with a set of tappets to act on a spring-arm bearing a hammer which strikes a bell. axle and between the polar extremities of an electro-magnet quantity of water passed through and discharged from the Mr. James E. Sarjent, of Brownville, Col., has… … different notes or sounds it is desired to pro A promising bed of cannel coal has lately EDISON'S ELECTRO-MAGNETIC BRAKE. been discovered about thirty miles from Des duce and caused to automatically pass over Moines, Iowa, down the river. It was found air ducts, which, accordingly as they are by…
Patented · Patents · Iron · Scientific American · Boiler · Ten years · Peculiar construction · Steam boilers · Sewing machine · Steam boiler · Carbonic acid · Life saving · Safety shield · Musical instrument
Internet Archive · Public domain (published before 1931). Free to use for anything.
