A Hand-book of the Electromagnetic TelegraphD. Van Nostrand, 1878 - 98 páginas |
Dentro del libro
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Página 7
... Insulators .... 66 PART IV . - PRACTICAL TELEGRAPHY . Alphabet and Numerals . Adjustment of Instruments . Testing Telegraph Lines Breaks .. Escapes Grounds . Crosses . PART V. - CONSTRUCTION OF LINES . The Conductors .. The Insulators ...
... Insulators .... 66 PART IV . - PRACTICAL TELEGRAPHY . Alphabet and Numerals . Adjustment of Instruments . Testing Telegraph Lines Breaks .. Escapes Grounds . Crosses . PART V. - CONSTRUCTION OF LINES . The Conductors .. The Insulators ...
Página 10
... insulators . No absolute division can be made between conductors and non - conductors , as the property of conduction ... insulator . CONDUCTORS . NON - CONDUCTORS . Dry wood , Porcelain , Silver , Copper , Gold , Dry Paper , Zinc , Silk ...
... insulators . No absolute division can be made between conductors and non - conductors , as the property of conduction ... insulator . CONDUCTORS . NON - CONDUCTORS . Dry wood , Porcelain , Silver , Copper , Gold , Dry Paper , Zinc , Silk ...
Página 50
... insulating material . The two upper plates are put overcome such resistance and is confined to the line . One form of arrester is shown in Fig . Lightning Arrester . in the circuit of the wires entering the office ,. 50.
... insulating material . The two upper plates are put overcome such resistance and is confined to the line . One form of arrester is shown in Fig . Lightning Arrester . in the circuit of the wires entering the office ,. 50.
Página 66
... INSULATORS . It is extremely desirable that the cups of main line batteries should be well insulated , not only from the stand on which they rest , but also from each other . Several good forms of battery insulators are in use ...
... INSULATORS . It is extremely desirable that the cups of main line batteries should be well insulated , not only from the stand on which they rest , but also from each other . Several good forms of battery insulators are in use ...
Página 76
... insulators , which confine the current to the conductors and prevent its escape to the ground . The poles are not essential to the working of a line , but serve merely as a support for the conductors , which are insulated from them at ...
... insulators , which confine the current to the conductors and prevent its escape to the ground . The poles are not essential to the working of a line , but serve merely as a support for the conductors , which are insulated from them at ...
Otras ediciones - Ver todas
A Hand-Book of the Electromagnetic Telegraph (Classic Reprint) A. E. Loring Sin vista previa disponible - 2018 |
A Hand-Book of the Electromagnetic Telegraph (Classic Reprint) A. E. Loring Sin vista previa disponible - 2015 |
Términos y frases comunes
23 Murray 25 cents 27 Warren Streets 50 cents adjusted armature binding posts break BRIDGES called carbon battery cells of battery closing the circuit cloth coils conducting power conductor Copies sent free cuit current of electricity cut-out Daniell Battery dots and dashes edition Electric Telegraph electro-magnet electro-motive force Engineer engravings escape Exercise free by mail Galvanic Galvanometer ground wire Grove battery hard rubber independent circuits instrument insulator lever lightning arrester line wire mail on receipt main circuit ments Messrs metals Morse Murray and 27 nected NOSTRAND'S PUBLICATIONS number of cells OHM'S LAW Ohms Paper covers pass plates platinum points PLYMPTON porous cup Prof put in circuit receipt of price relay magnet Repeater resistance rheostat set screw short lines shown in Fig sistance soft iron solution sounder station sulphate of copper sulphuric acid telegraph circuit telegraph line TELEPHONIC RESEARCHES Terminal Station tery tion tumbler wood-cuts Yale College zinc