Wireless Telegraphy and Telephony

Forfatter: Alfred P. Morgan

År: 1917

Forlag: The Norman W. Henley Publishing Company

Sted: New York

Udgave: Third Edition, Fully Illustrated

Sider: 33

UDK: 621.396.1 Mor

A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development

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 ________________ sseaEsS xii LIST OF ILLUSTRATIONS Fig. 26 .—Leading-in insulator__________________________ Fig. 27 .—A side view of the aerial shown in Fig. 22 Fig. 28 .—Diagram showing how batteries may be arranged . Fig. 29 .—The power plant of a Marconi transatlantic station Fig. 30 .—If a magnet be suddenly plunged into a hollow coil of wire a momentary current will be induced in the coil Fig. 31 .—Magnetic phantom formed by a bar magnet . Fig. 32 .—Magnetic phantom formed by a wire carrying cur- rent ........................................... Fig- 33-—Magnetic phantom formed by a coil of wire carry- ing current . ................................... Fig. 34 .—Diagram of induction coil______________________ Fig- 35-—Induction coil for wireless telegraph purposes Fig. 36 .—Induction coil primary and secondary Fig- 37-—Interrupter for induction coil__________________ Fig. 38 .—Electrolytic interrupter______________________ Fig. 39 .—Open and closed core transformers .... Fig. 40 .—Lines representing direct and intermittent direct cur- rents ............................. ... Fig. 41 .—Diagram representing alternating current Fig. 42 .—High potential humming transformer Fig. 43 .—High potential closed core transformer for wireless work........................................... Fig. 44 .—Leyden jar set for oil immersion .... Fig. 45 .—Oil immersed condenser______________________ Fig. 46 .—Diagram showing construction of condenser . Fig. 47 .—Tubular condenser Fig. 48 .—Helix...................... Fig. 49 .—Close coupled helix Fig. 50 — Spark gap.................. Fig. 51 .—Circuit showing tuned transmitting ing close coupled helix Fig. 52 .—Photo of spark gap Fig. 53 .—Quenched spark gap . Fig. 54 .—Diagram of aerial switch . Fig- 55-—Photo of aerial switch Fig. 56.—Anchor gap.................. Fig- 57-—Wireless key.................. Fig. 58.—Photo of wireless key . Fig- 59-—Key and aerial switch PAGE 25 26 27 28 29 30 31 31 32 33 34 34 35 36 36 37 37 38 39 40 40 41 41 system employ- 43 43 44 44 45 45 46 46
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