. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . The relay. 850 TELEGRAPH. relay designed by Mr. Phelps, and which is represented in Fig. 33. It will be scon to consistof two steel magnets, bent as shown, with their like poles brought together and carrying anextension piece which has a V-shaped groove at the top. The other ends of the magnetscarry extension pole-pieces and line wire helices. The armature is about the same thick-ness and size as a 3-cent nickel pie
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . The relay. 850 TELEGRAPH. relay designed by Mr. Phelps, and which is represented in Fig. 33. It will be scon to consistof two steel magnets, bent as shown, with their like poles brought together and carrying anextension piece which has a V-shaped groove at the top. The other ends of the magnetscarry extension pole-pieces and line wire helices. The armature is about the same thick-ness and size as a 3-cent nickel piece, but its lower edge is straight and thinned down to aknife edge, which rests in the bottom of the V-shaped groove. Tluis we have friction entirely. Fig. 34 Edisoii-SuiiLU , ti legraph. removed, while the small mass and leverage of the armature, together with the strongmagnetic field in which it is placed, prevent its moving under shock or vibration. It re-sponds, therefore, only to the impulses sent through the coils, and its action is very delicatein spite of its shock-resisting power. Edison-Smith Static Train Jelegraph.—\\\\i\e the Phelps train telegraph is actuatedby dynamic induction, the Edison-Smith system is based upon static induction, the metal 4i Fig. 35.—Station connections.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
