An account of some remarkable applications of the electric fluid to the useful arts by Alexander Bain1843 - 80 pages |
Other editions - View all
Common terms and phrases
18th of August Alexander Bain apparatus application assertion Baddeley Bain's experiments Bain's inventions Bain's model Bain's patent Barwise breaking the circuit Charles Wheatstone claim coil communication conducting wire contrivance Cooke and Wheatstone cylinder dear Sir deflected needles diagram dial disc discovery distance earth Electric Clock electric current electric fluid Electric Telegraph Electro-Magnetic Clock Electro-Magnetic Printing Telegraph electro-magnetic telegraph employed engine evidence exhibited fact feeder former galvanic battery galvanometer gentlemen inserted instrument insulated interview inventor isochronous signals January John Lamb July June King's College letters patent Literary Gazette machine magnetic needles mechanical ment mention merit Messrs metallic surface months motion paper passed pendulum person plate Polytechnic principle printing-telegraph Professor Wheatstone purpose question ratchet-wheel reader referred rheotome river Ronalds Royal Society says Serpentine River show letters shown signals Sir Frederick Pollock specification spring tele Telegraph Clock tion voltaic circuit Wheatstone's wheel workman writer
Popular passages
Page 88 - The movement of the upper one was shown by an index, that pointed to the right or to the left according to the direction of the motion.
Page 59 - Nil habet infelix paupertas durius in se, Quam quod ridicules homines facit...
Page 90 - The types then operate upon the machinery and serve to regulate the times and intervals ot the passages of electricity. Each passage of the fluid causes a pencil at the extremity of the wire to mark the points as in the diagram. To read the marks, count the points at the bottom of each line. It will be perceived that two points come first, separated by a short interval From the next point. Set 2 beneath it. Then comes one point likewise separated by a short interval. Set 1 beneath it. Then come four...
Page 42 - ... subject. Among these were his well-known determination of the velocity of electricity when passing through a metal wire ; — his experiments, in which the deflection of magnetic needles, the decomposition of water, and other voltaic and magnetoelectric effects, were produced through greater lengths of wire than had ever before been experimented upon ; and his original method of converting a few wires into a considerable number of circuits, so that they might transmit the greatest number of signals,...
Page 123 - Principles of Mechanism, designed for the use of Students in the Universities, and for Engineering Students generally.
Page 25 - ... the railing, and on placing a galvanometer in the circuit, an electric current was produced, which passed through the intervening mass of earth from one plate to the other, returning by the wire. In the first experiment, the metallic surfaces being small, the electric current produced was feeble, but on using a larger surface of metal a corresponding increase in the energy of the current was obtained, with which an electrotype process was conducted, and various Electro-Magnetic experiments performed...
Page 90 - Telegraphic dictionary. The points are the markings of the Register, each point being marked every time the electric fluid passes. The Register marks but one kind of mark, to wit, (V). This can be varied two ways. By intervals thus (V...
Page 89 - FF are screens, thirty in number, each being fixed to a needle, corresponding to the finger keys before described. When no electricity is passing, these screens remain stationary over the several letters, &c., and conceal them from view; but when a current is made to flow by the depression of a key, the corresponding needle in the distant instrument is deflected, carrying the screen with it, and uncovering the letter, which becomes exposed to view, as at 0.
Page 90 - Professor Morse tried an experiment with a circuit of copper wire one thousand seven hundred feet in length, and of the minimum size of No. 18 wire. The record of the Register was sufficiently perfect to demonstrate the practicability of the plan. On the 4th of September some slight changes were made in the machinery, when the Register recorded perfectly the following signs : — Siieci/nen of Telegraphic writing made by means of electricity at the distance of onethird of a mile.
Page 116 - ... white paper and of the blackened paper used in the manifold writing apparatus, he has been enabled to obtain, without presenting any resistance to the type wheel, several distinct printed copies at the same time of the message transmitted. 2. He has applied the principles of the telegraph described, to enable the time of a single clock to be shown simultaneously in a great number of places, or in other words to telegraph time instead of messages. For this purpose the wheel for making and breaking...