The Electrical EngineerBiggs & Company, 1893 - Electrical engineering |
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Page 9
... Pressure being 40 volts . " 2 Energy consumed by lamp being 400 watts . Diameter of carbons being 13mm . With a full arc lamp , or one taking 10 amperes , the best size of carbons to use is 13mm . , or in . , in diameter . With a half ...
... Pressure being 40 volts . " 2 Energy consumed by lamp being 400 watts . Diameter of carbons being 13mm . With a full arc lamp , or one taking 10 amperes , the best size of carbons to use is 13mm . , or in . , in diameter . With a half ...
Page 30
... pressure of 200 volts . This is done by connect- FIG . 4. - Longitudinal Section of Straining - up. LEAD METHODS OF ... pressure system . If generated on the high - pressure system , it may be eitner to give continuous or alternating ...
... pressure of 200 volts . This is done by connect- FIG . 4. - Longitudinal Section of Straining - up. LEAD METHODS OF ... pressure system . If generated on the high - pressure system , it may be eitner to give continuous or alternating ...
Page 31
... pressure between A and B , is 200 volts , but between any two of the mains it is only 100 volts , the pressure required for the due working of the lamps . This , then , is the three - wire system , about which we hear so much , and ...
... pressure between A and B , is 200 volts , but between any two of the mains it is only 100 volts , the pressure required for the due working of the lamps . This , then , is the three - wire system , about which we hear so much , and ...
Page 35
... pressure of about three tons being employed . While under this pressure the copper sleeve is firmly locked to the outer conductor by means of circular corrugations . The sleeve and the outer insulation are wrapped at the junction with ...
... pressure of about three tons being employed . While under this pressure the copper sleeve is firmly locked to the outer conductor by means of circular corrugations . The sleeve and the outer insulation are wrapped at the junction with ...
Page 40
... PRESSURE IN FEEDERS FOR DERBY ELECTRIC LIGHTING STATION , MIDLAND RAILWAY . The illustration is taken from a photo of a new com- pensator for fall of pressure in feeders , constructed on Sayers's new principle by Messrs . Mavor and ...
... PRESSURE IN FEEDERS FOR DERBY ELECTRIC LIGHTING STATION , MIDLAND RAILWAY . The illustration is taken from a photo of a new com- pensator for fall of pressure in feeders , constructed on Sayers's new principle by Messrs . Mavor and ...
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adopted alternating current amount amperes annum apparatus arc lamps armature arranged batteries Board of Trade boilers Brush Electrical brushes cable capital carbon carried cent central station Chairman Chancery-lane charge circuit conductors connected considerable construction copper Corporation cost Councillor curve Directors distance dividend dynamos effect efficiency electric light Electric Light Company Electric Supply electrical engineer electrolytic energy experiments Fleet Street give Glasgow heat Improvements incandescent lamps increase induction installation instrument insulated iron load London Lord Kelvin machine magnetic mains matter means measure mechanical meeting ment Messrs metal meter miles motors municipal National Telephone Company obtained ordinary patents plant plate position present pressure Prof proposed provisional order railway resistance series coils shares shunt Siemens square steam street Telegraph tion Town Council traction tramway transformer tricity tube unit voltage voltmeter volts wattmeter watts wire
Popular passages
Page 255 - Engineer, being the art of directing the great sources of power in Nature for the use and convenience of man...
Page 228 - As a unit of quantity, the international coulomb, which is the quantity of electricity transferred by a current of one international ampere in one second. As a unit of capacity, the international farad, which is the capacity of a condenser charged to a potential of one international volt by one international coulomb of electricity.
Page 304 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page 304 - 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.
Page 305 - 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 all expelled, and the cell should be left in this condition for at least twenty-four hours before sealing, which should be done as follows.
Page 304 - This is supported horizontally in the liquid near the top of the solution by a platinum wire passed through holes in the plate at opposite corners. To prevent the disintegrated silver which is formed on the anode from falling on to the kathode, the anode should be wrapped round with pure filter paper, secured at the back with sealing wax.
Page 228 - As a unit of work, the joule, which is equal to 107 units of work in the CGS system, and which is represented sufficiently well for practical use by the energy expended in one second by an international ampere in an international ohm.
Page 305 - ... 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.
Page 305 - ... solution, adding sufficient crystals of zinc sulphate from the stock bottle to ensure saturation, and a small quantity of pure mercury. Shake these up well together to form a paste of the consistence of cream. Heat the paste, but not above a temperature of 30° C.
Page 253 - ... in a similar form in his own works ; and this by no less a mathematician than LEONARD EULER, whose system of light, as far as it is worthy of notice, either was, or might have been, wholly borrowed from NEWTON, HOOKE, HUYGENS, and MALEBRANCHE.