An Account of Some Remarkable Applications of the Electric Fluid to the Useful Arts, by Mr. Alexander Bain: With a Vindication of His Claim to be the First Inventor of the Electro-magnetic Printing Telegraph, and Also of the Electro-magnetic Clock |
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18th of August Advocate 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 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 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
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Page 44 - Wheatstone, who had for several years given much attention to the subject of transmitting intelligence by electricity, and had made several discoveries of the highest importance connected with this 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...
Page 90 - 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 92 - VVV) signifying one, two, three, &c., and by reversing thus (д); examples of both these varieti.es are seen in the diagram. The single numbers are separated by short, and the whole numbers by long intervals. To illustrate by the diagram, the word "successful...
Page 91 - ... operator ; E is the end of a conducting wire, which dips into the mercury when the key is depressed, and completes the electric circuit ; DD is the distant dial upon which the signals are to be shown ; 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...
Page 75 - ... 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...
Page 71 - Principles of Mechanism, designed for the use of Students in the Universities, and for Engineering Students generally.
Page 32 - Waterloo-bridge, and thence to the top of the tower, where one of the telegraphs was placed. The wire then descended, and a plate of zinc attached to its extremity was plunged into the mud of the river ; a similar plate was attached to the extremity at the north side, and was immersed in the water. The circuit was thus completed by the entire breadth of the Thames, and the telegraphs acted as well as if the circuit was entirely metallic.
Page 27 - SWrUmftmtiStStrrtMt *- •' the railing, and on placing a galvanometer in the circuit, an electric current was produc^ , 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...
Page 31 - ... might be done, by connecting the two extremities of one of the communicating wires with plates of metal, and plunging them into the earth or into water — one of the communicating wires might be entirely dispensed with ; this plan would be adopted at Aix-la-Chapelle. That a large extent of earth, or a portion of a river, could be made to complete an electric circuit, was long since established with respect to electricity of high tension, by the extensive experiments of Dr. Watson, in 1748, and...
Page 45 - GENTLEMEN,— We cordially acknowledge the correctness of the facts stated in the above document, and beg to express our grateful sense of the very friendly and gratifying manner in which you have recorded your opinion of our joint labours, and of the value of our invention. We are, Gentlemen, with feelings of the highest esteem, your obedient servants, "Wax*. F. COOKE. 0. WHEATS-TONE. " Sir M. laambard Brunei and JF Daniell, Esq., Professor, &c. &c.