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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LIST OF ILLUSTRATIONS XÜi
PAGE
Fig. 6o .—Portable receiving set and case .... 49
Fig. 61 .—Complete receiving outfit..............................49
Fig. 62 .—Portable pack set......................................5°
Fig. 63 .—Complete receiving set.................................51
Fig. 64 .—Showing the construction of a watch case telephone
receiver..............................................52
Fig. 65 .—Pickard adjustable telephone receivers ... 53
Fig. 66 .—Illustrating the valve action of a rectifying detector 54
Fig. 67 .—A new type of silicon detector.....................54
Fig. 68<—Diagram drawing analogy between rectifying action
of a detector and pump................................55
Fig. 69 .—Pyron detector.........................................56
Fig. 70 .—Perikon detector.......................................57
Fig. 71 .—Silicon detector.......................................58
Fig. 72 .—Electrolytic detector..................................58
Fig. 73 .—Electrolytic detector in circuit.......................59
Fig. 74 .—Potentiometer..........................................59
Fig. 75 .—Diagram showing how potentiometer is connected in
a circuit...................................................60
Fig. 76 .—Analogy between swinging and tuning ... 61
Fig. 77 .—Receiving a message in a Marconi transatlantic
station.....................................................62
Fig. 78 .—Tuning coil of the double slide type ... 63
Fig. 79 .—Diagram showing fixed condenser in circuit . . 63
Fig. 80 .—Fixed condenser.................................... . 64
Fig. 81 .—Rotary variable condenser..............................65
Fig. 82 .—Interior of rotary variable condenser, showing con-
struction ................................................. 66
Fig. 83 .—Dr. Seibt’s rotary variable condenser ... 67
Fig. 84 .—Sliding plate variable condenser .... 68
Fig. 85 .—Diagram showing arrangement of rotary variable
condenser in receiving circuit ...... 68
Fig. 86—Chain and ball arranged to illustrate the effect of
tuning ...............................................71
Fig. 87 .—Loose coupled helix................................72
Fig. 88 .—Hot-wire ammeter...................................73
Fig. 89 .—The principle of the hot-wire ammeter ... 73
Fig. 90 .—Diagram showing loose coupled helix in circuit . 74
Fig. 91 .—Loose coupled tuning coil..........................75
Fig. 92 .—Loose coupled tuner................................75