Telephone Construction, Installation, Wiring, Operation and MaintenanceN.W. Henley Publishing Company, 1914 - 223 стор. |
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Результати 1-5 із 43
Сторінка 10
... ground or pulverized carbon or graphite varies in electrical resistance according to the mechanical pressure brought to bear upon it . Under high pressure the resistance of carbon is low , but under a low pressure its resistance is ...
... ground or pulverized carbon or graphite varies in electrical resistance according to the mechanical pressure brought to bear upon it . Under high pressure the resistance of carbon is low , but under a low pressure its resistance is ...
Сторінка 33
... shown in Fig . 19 ; that is , the earth or ground is used as one con- ductor between the two stations a and b , in place of one of the line wires . Either a grounded circuit . or a two - wire ( complete metallic ) circuit 33.
... shown in Fig . 19 ; that is , the earth or ground is used as one con- ductor between the two stations a and b , in place of one of the line wires . Either a grounded circuit . or a two - wire ( complete metallic ) circuit 33.
Сторінка 34
... ground at each . station may be made either by fastening the ground wire to a water pipe or to a metal rod driven down to moist earth . The surface of the pipe or rod should be filed or scraped bright , the wire then wound around it ...
... ground at each . station may be made either by fastening the ground wire to a water pipe or to a metal rod driven down to moist earth . The surface of the pipe or rod should be filed or scraped bright , the wire then wound around it ...
Сторінка 48
... ground wire from the lightning arrester a . The receiver r is connected between the binding posts 4 and 5 , 00000 eeeeeee a m FIG . 32. - The Inside Wiring of a Series Telephone Set usually by 2 feet of No. 18 B. & S. gage stranded twin ...
... ground wire from the lightning arrester a . The receiver r is connected between the binding posts 4 and 5 , 00000 eeeeeee a m FIG . 32. - The Inside Wiring of a Series Telephone Set usually by 2 feet of No. 18 B. & S. gage stranded twin ...
Сторінка 50
... ground wire to earth ; this it does in preference to traversing the inductive circuit through the instruments . Telephone cur- rents being of comparative low voltage cannot cross the space between the carbon blocks and , therefore , are ...
... ground wire to earth ; this it does in preference to traversing the inductive circuit through the instruments . Telephone cur- rents being of comparative low voltage cannot cross the space between the carbon blocks and , therefore , are ...
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Telephone Construction: Installation, Wiring, Operation and Maintenance ... William Hiram Radcliffe Попередній перегляд недоступний - 2015 |
Telephone Construction: Installation, Wiring, Operation and Maintenance ... William Hiram Radcliffe Попередній перегляд недоступний - 2017 |
Загальні терміни та фрази
alternating current ampere armature automatic binding posts bolt brace called cents clamp complete metallic circuit Concrete conductors conduit connected construction containing copper copper wire cord cross-arms desk set diaphragm distributing board Dry cells electrical electromotive force exchange switchboard extension bell fastened feet fully illustrated gage gas engines gear ground heat coil HISCOX hole hook switch inches induction coil installation insulated iron wire jack lamp Leclanché cell lightning arrester line circuit line drop line wires machine magnet magneto bell mechanical method mounted O'CONOR SLOANE ohms operator operator's pair party party-line systems pipe placed plate plug pole position practical primary winding Protective Apparatus receiver resistance ringing key rope rubber screw sheath shown in Fig shows shunt side signal sleeve soldered spring steam steel storage battery switch arm tele Telephone Circuit telephone set terminals Testing tion transmitter usually wall set zinc
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