The History and Progress of the Electric Telegraph: With Descriptions of Some of the Apparatus

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D. Van Nostrand, 1869 - 280 ページ
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目次

Pithball Electroscopes
10
Keussers Telegraph
11
Cavallos Telegraph
12
Ronalds Telegraph
14
Telegraphs by Voltaic Electricity 19 Discoveries of Voltaic Electricity
15
Voltas Contact Theory Chemical Theory
18
Voltas Pile
19
Discovery of the Decomposition of Water by the Pile
20
Telegraphs by Electromagnetism and Magneto Electricity 27 Romagnis Discovery of Electromagnetism
23
Sommerings Telegraph
25
Ritchies Telegraph
26
Sturgeons Discovery of the Electromagnet
27
Schillings Telegraph
28
Faradays Discoveries Morses Invention of an Electro magnetic Telegraph
29
Gauss and Wehers Telegraph
33
Steinheils Telegraph
38
Discovery of the Earth Circuit
42
Cooke and Wheatstones Needle Telegraph
43
Wheatstones Alarm
46
Local Circuit System
47
Practical Application of Morses Telegraph
48
Davys Telegraph
50
Wheatstones Dial Telegraph
51
improved
52
Classification
54
Needle Telegraphs introduced into England
57
Morse Telegraph Simple Circuit
59
Simple Morse Embosser for two Stations with Relay
61
The Morse Code
63
Transmitting Keys i
66
Submarine Keys
67
De Sautys Submarine Key
71
Varleys Switch
73
Lacoines Key
77
Relays
79
Polarised or Induction Relays
80
Morse Recorders
84
Directworking Recorders
86
Beaudoin and Digneys
88
Siemens and Halskes
91
VinayB Inkrecorders
94
Sortais Selfstarting Apparatus
98
Translation or Retransmission of Morse Signals
99
Varleys Translating Apparatus
102
Polarised Inkrecorder as Submarine Key
106
The Translation Spring
109
Complete Submarine Board
110
Morse Apparatus worked by closed Circuit
113
Method of Translation between a Line with closed and one with open Circuit
115
Method of Translation between two Lines with closed Circuit
117
Methods of Telegraphing in opposite Directions at the same Time in a Single Wire
119
by Chemical Means
122
Plan of Frischen and Siemens
123
Method of transmitting two Messages along a single Line in the same Direction at the same Time
125
Stoehrers Doublestyle Apparatus
129
Alphabetical Code
132
Morse Telegraph worked by Induction Currents
133
Magnetoinduction Key
137
Intermediate Station Commutators
138
Nottebohms Commutator
139
Alarm used with same
161
Breguets Electromagnetic Dial Instrument
163
Wheatstones Universal Telegraph
168
Kramers Pointer Telegraph
169
Alarm Systems
172
Principle of the Selfacting Makeandbreak
175
e Typeprinting Telegraphs
178
Classes of Typeprinters
179
Houses Printing Telegraph
190
Desgoffes Typeprinter
192
Jolys
194
Morenes
196
DArlincourts
198
Electrochemical and Copying Telegraphs J 119 Bains Chemical Telegraph
199
PougetMaisonneuves Telegraph
201
Gintls
202
Bakewells Copying Telegraph
203
Casellis Chemical Copying Telegraph
204
Cros
206
Bonellis Chemical Type Telegraph
208
Lenoirs Mechanical Copying Telegraph
212
Overhead Lines 127 Early Lines
215
Iron and Stone Posts
218
Line Insulators
220
Clarks
221
Spanish
222
French
223
Austrian War Insulator
224
Chauvins
225
Brookss 22G 142 The Wire
227
Protection of 2J7 144 Joints in
228
Erection of Overland Lines
231
Phenomenon of Charge in Wires
233
The Earthplate
234
Submarine Telegraph Lines 149 DoverCalais Cahle
235
First Atlantic
237
MaltaAlexandria Cahle
239
Persian Gulf
240
CarthagenaOran
242
and 1866 Atlantic Cables
243
Submersion of Cables
245
Taking Bearings
247
Bottom of the Ocean
248
Cable whilst sinkingSlack
250
Underground Telegraphs
253
Underground System preferred
254
French System
255
Atmospheric Electricity 166 Franklins Experiments
258
Theory of Thunderstorms
259
Steinheils Lightning Discharger
263
Meissners Plate
265
Siemens
266
Breguets Plate Discharger
267
Fardleys
268
Siemens Point
269
German
271
Kerckhoffs
272
Automatic Guards of Tesse and Picco
273
Schweiggers Telegraph 22
278

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11 ページ - In electricity he has made a remarkable discovery : you write two or three words on a paper ; he takes it with him into a room, and turns a machine inclosed in a cylindrical case, at the top of which is an electrometer, a small fine pith ball; a wire connects with a similar cylinder and electrometer in a distant apartment ; and his wife, by remarking the corresponding motions of the ball, writes down the words they indicate : from which it appears that he has formed an alphabet of motions. As the...
5 ページ - he felt himself struck in his arms, shoulders, and breast, so that he lost his breath, and was two days before he recovered from the effects of the blow and the terror.
30 ページ - When the contact was made, there was a sudden and very slight effect at the galvanometer, and there was also a similar slight effect when the contact with the battery was broken.
8 ページ - An expeditious method of conveying intelligence." wire, from one place to another, without being sensibly abated by the length of its progress. Let, then, a set of wires, equal in number to the letters of the alphabet, be extended horizontally between two given places, parallel to one another, and each of them about an inch distant from that next to it. At every twenty yards...
9 ページ - The same thing may be otherwise effected. Let the balls be suspended over the characters as before, but instead of bringing the ends of the horizontal wires in contact with the barrel, let a second set reach from the electrified...
259 ページ - ... the art of directing the great sources of power in nature for the use and convenience of man, as the means of production and of traffic in states.
29 ページ - Certain effects of the induction of electrical currents have already been recognized and described: as those of magnetization; Ampere's experiments of bringing a copper disc near to a flat spiral; his repetition with electro-magnets of Arago's extraordinary experiments, and perhaps a few others. Still it appeared unlikely that these could be all the effects which induction by currents could produce; especially as, upon dispensing with iron...
201 ページ - Lille and back, making a total distance of 336 miles. This, however, not being deemed sufficient for the purpose, several coils of wire wrapped with silk were obtained, measuring in their total length 746 miles, and were joined to the extremity of the wire returning from Lille; thus making one continuous wire measuring 1,082 miles.
9 ページ - To prevent this objection, and save longer argument, lay over the wires from one end to the other with a thin coat of jeweller's cement. This may be done for a trifle of additional expense, and, as it is an electric per se, will effectually secure any part of the fire from mixing with the atmosphere. I am, etc., CM...
8 ページ - At every twenty yards' end, let them be fixed in glass, or jeweller's cement, to some firm body, both to prevent them from touching the earth, or any other nonelectric, and from breaking by their own gravity. Let the electric gun-barrel be placed at right angles with the extremities of the wires, and about an inch below them. Also let the wires be fixed in a solid piece of glass, at six inches from the end ; and let that part of them which reaches from the glass to the machine have sufficient spring...

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