Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 201
ns of toothed wheels moved by cranks.294. Single Beam Axial Engine. — Fig. 125represents an instrument in which a reciprocat-ing motion is communicated to a horizontal beam,by the alternate movement of two bent bars. Theiron bars are not attached to the ends of the beam,but simply rest upon them.… … struction at B, by means of which the current isahernately transmitted to each of the double helices.To Dr. Page is due the invention of the first instru-ments in which the source of motion was the axialforce exerted by helices on either straight or bentbars of iron. 295. Electro-Magnet. — A bar of…
