Electric Lighting: A Practical Exposition of the Art, for the Use of Engineers, Students, and Others Interested in the Installation Or Operation of Electrical Plants, Том 2D. Van Nostrand Company, 1901 |
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Сторінка 320
... Globe . The inclosing bulb is an egg - shaped globe about . 5 inches long and 2 inches in diameter , tightly sealed below , and partially closed above . When an arc is sprung between the car- bons inclosed in this manner , at first the ...
... Globe . The inclosing bulb is an egg - shaped globe about . 5 inches long and 2 inches in diameter , tightly sealed below , and partially closed above . When an arc is sprung between the car- bons inclosed in this manner , at first the ...
Сторінка 324
... globe the light is a violet tinge , which is not as pleasant as the modified color . The opalescent inner bulb usually employed acts also to diffuse the light , so that no violently luminous spot exists , but the light comes from the ...
... globe the light is a violet tinge , which is not as pleasant as the modified color . The opalescent inner bulb usually employed acts also to diffuse the light , so that no violently luminous spot exists , but the light comes from the ...
Сторінка 325
... globe , the same being shown graph- ically in Fig . 271. The same investigators measured the loss by opalescent outer globes , which they found varied from 35 to 50 per cent , and which occasionally is as great as 60 per cent . They ...
... globe , the same being shown graph- ically in Fig . 271. The same investigators measured the loss by opalescent outer globes , which they found varied from 35 to 50 per cent , and which occasionally is as great as 60 per cent . They ...
Сторінка 326
... globe only opal inner globe only opal inner + opal oute Fig . 271. Light Distribution , Inclosed Arc with different Globes . TABLES XI . AND XII . ( FREEDMAN . ) CLEAR INNER GLOBE . OPAL INNER Globe . ANGLE FROM THE HORIZONTAL . CANDLE ...
... globe only opal inner globe only opal inner + opal oute Fig . 271. Light Distribution , Inclosed Arc with different Globes . TABLES XI . AND XII . ( FREEDMAN . ) CLEAR INNER GLOBE . OPAL INNER Globe . ANGLE FROM THE HORIZONTAL . CANDLE ...
Сторінка 327
... globe will increase the life ; but it has a tendency to raise the temperature of the interior sufficient to warp or interfere with the action of some of the parts , although it will not do so with proper construction . Alternating ...
... globe will increase the life ; but it has a tendency to raise the temperature of the interior sufficient to warp or interfere with the action of some of the parts , although it will not do so with proper construction . Alternating ...
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Electric Lighting: A Practical Exposition of the Art, for the Use of ... Francis Bacon Crocker Попередній перегляд недоступний - 2016 |
Загальні терміни та фрази
alternating current amperes apparatus arc lamps armature arrangement bulb bus bars cable candle-power capacity carbon cent circular mils conductors conduit connected constant current constant potential copper loss core cross-arm cross-section cut-out device diameter difference direct current distribution drop dynamo effect efficiency electric lighting electrical conductors employed energy equal fact feeders feeding-points filament flow frequency full load fuse globe ground heat hence incandescent lamps inch inclosed arc increase inductance insulation iron joint latter length less machines magnetic maximum mechanical metal meter method motor number of lamps ohms one-half open arc operation ordinary parallel phase pipe placed pole polyphase porcelain practically pressure primary produced reactance regulation represented in Fig resistance rheostat rotary rotary converters secondary circuit shown in Fig shunt side single-phase socket supplied switch temperature terminal three-phase three-wire system tion transformers tube two-phase two-wire two-wire circuit usually voltage volts wattmeter watts winding
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Сторінка 460 - The lower limit is specified for rubber-covered wires to prevent gradual deterioration of the high insulations by the heat of the wires, but not from fear of igniting the insulation. The question of drop is not taken into consideration in the above tables.
Сторінка 11 - W, we find that the most economical area of conductor is that for which the annual cost of energy wasted is equal to the annual interest on that portion of the capital outlay which can be considered to be proportional to the weight of metal used. Professor George Forbes, in his Cantor Lecture, on " The Distribution of Electricity...
Сторінка 459 - Must be so placed in wet places that an air space will be left between conductors and pipes in crossing, and the former must be run in such a way that they cannot come in contact with the pipe accidentally. Wires should be run over, rather than under, pipes upon which moisture is likely to gather or which, by leaking, might cause trouble on a circuit.