Telegraphic Journal and Monthly Illustrated Review of Electrical Science, Том 8Electrical review, Limited, 1891 |
З цієї книги
Результати 6-10 із 78
Сторінка 30
... less intimacy of surface contact . This is practically the micro- phone . 3. Lampblack ( soft carbon ) . 4. Springs for carrying microphonic contacts . 5. Screws for regulating the pressure exerted by the springs . 6. Combination of ...
... less intimacy of surface contact . This is practically the micro- phone . 3. Lampblack ( soft carbon ) . 4. Springs for carrying microphonic contacts . 5. Screws for regulating the pressure exerted by the springs . 6. Combination of ...
Сторінка 35
... less battery power ; having the magnetism retained in the armature until it does work , allows longer stroke and a more agreeable tone . It has sliding contacts , making it less liable for them to oxidise ; it has an automatic make and ...
... less battery power ; having the magnetism retained in the armature until it does work , allows longer stroke and a more agreeable tone . It has sliding contacts , making it less liable for them to oxidise ; it has an automatic make and ...
Сторінка 37
... less well known . We have therefore requested the author to give us an estimate of the cost and the returns of a line to be altered from horse traction to electric traction upon his system . Experimentally , the line he has constructed ...
... less well known . We have therefore requested the author to give us an estimate of the cost and the returns of a line to be altered from horse traction to electric traction upon his system . Experimentally , the line he has constructed ...
Сторінка 47
... less than three nor more than nine Directors The first shall be the first signatories to the memorandum of asso ciation . Qualification , 50 ordinary shares . Remuneration , Chair- man , £ 250 per annum ; ordinary Directors , £ 150 each ...
... less than three nor more than nine Directors The first shall be the first signatories to the memorandum of asso ciation . Qualification , 50 ordinary shares . Remuneration , Chair- man , £ 250 per annum ; ordinary Directors , £ 150 each ...
Сторінка 51
... less than three nor more than seven Directors ; the first are the signatories to the memorandum of association . Qualification , one share . Remuneration to be determined in general meeting . -- Hampstead Electric Light and Power Supply ...
... less than three nor more than seven Directors ; the first are the signatories to the memorandum of association . Qualification , one share . Remuneration to be determined in general meeting . -- Hampstead Electric Light and Power Supply ...
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Інші видання - Показати все
Telegraphic Journal and Monthly Illustrated Review of Electrical Science, Том 94 Повний перегляд - 1924 |
Telegraphic Journal and Monthly Illustrated Review of Electrical Science, Том 92 Повний перегляд - 1923 |
Загальні терміни та фрази
adopted alternating currents amperes apparatus applied arc lamps armature arranged battery boilers Brush Brush Electrical cable carbon carried cell cent centimetres central station charge circuit coal coil committee conductors connected considerable construction copper Corporation cost creosote cylinder diameter Directors discharge distance dividend dynamo effect efficiency electric conductors electric light Electric Lighting Company electric motors Electric Supply electrical engineer energy experiments give heat horse-power Improvements incandescent incandescent lamps increased induction installation insulated interest iron London London County Council machine magnet means meeting Messrs metal miles motor obtained ordinary paper patent plant practical present pressure Prof proposed provisional order railway receipts resistance revolutions per minute shares speed steam street subscribers surface switch Telegraph telephone temperature tion Town Council tramway transmission tube volts wire zinc zinc sulphate
Популярні уривки
Сторінка 244 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Сторінка 245 - It is convenient to arrange the mounting so that the cell may be immersed in a water bath up to the level of, say, the upper surface of the cork. Its temperature can then be determined more accurately than is possible when the cell is in air. In using the cell sudden variations of temperature should as far as possible be avoided.
Сторінка 292 - 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.
Сторінка 245 - In the following specification the term silver voltameter means the arrangement of apparatus by means of which an electric current is passed through a solution of nitrate of silver in water. The silver voltameter measures the total electrical quantity which has passed during the time of the experiment, and...
Сторінка 245 - Then insert the cork and zinc rod, passing the glass tube through the hole prepared for it. Push the cork gently down until its lower surface is nearly in contact with the liquid. The air will thus be nearly...
Сторінка 192 - May there not also bo an immaterial (perhaps an ethereal) medium of communication ': Is it possible that an idea can be transferred from one person to another by a process such as we have not yet grown accustomed to, and know practically nothing about? In this case I have evidence. I assert that I have seen it done, and am perfectly convinced of the fact.
Сторінка 213 - ... planet. Doppler had suggested as far back as 1841 that the same principle, on which he had shown that a sound should become sharper or flatter if there were an approach or a recession between the ear and the source of the sound, would apply equally to light ; and he went on to say that the difference of colour of some of the binary stars might be produced in this way by their motions.
Сторінка 293 - Must be capable of being disconnected at the power plant, or of being divided into sections, so that in case of fire on the railway route, the current may be shut off from the particular section and not interfere with the work of the firemen. This rule also applies to feeders.
Сторінка 245 - ... carefully removing any loose pieces of the zinc. Just before making up the cell dip the zinc into dilute sulphuric acid, wash with distilled water, and dry with a clean cloth or filter paper.
Сторінка 190 - ... too remote to be resolved into separate stars ; though indeed, in 1858, Mr. Herbert Spencer showed that the observations of nebulse up to that time were really in favour of an evolutional progress. In 1864 I brought the spectroscope to bear upon them; the bright lines which flashed upon the eye showed the source of the light to be glowing gas, and so restored these bodies to what is probably their true place, as an early stage of sidereal life. At that early time our knowledge of stellar spectra...