Modern Engineering Practice: A Reference Library..., Том 1American School of Correspondence, 1906 |
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Modern Engineering Practice: A Reference Library... American School (Chicago, Ill.) Повний перегляд - 1906 |
Modern Engineering Practice: A Reference Library... American School (Chicago, Ill.) Повний перегляд - 1906 |
Загальні терміни та фрази
alternating current ampere-hours amperes ance apparatus armature battery bell binding post brushes capacity carbon cell centimetre charge circuit closed condenser conducting conductor connected in series core cross-arm current passes dash deflection diameter diaphragm direction disc distance duplex dynamo electric waves electrode electromagnet electromotive force energy Engineering equal Example feet flow formula Fort Wayne fuse galvanometer glass ground heat inches induction coil instrument insulation internal resistance joules lamps length letters lever line wire machine magnet main line mechanical megohms metal method Morse motor needle Ohm's law ohms operation oscillator petticoat pipe Pittsburg placed plate platinum plugs polar relay pole changer porcelain positive potential primary receiver required resist rheostat screws shown in Fig shunt signals silver soldered Solution sounder spring station sulphuric acid surface switch switchboard telegraph telephone temperature terminals tion transmitter unit vibrations voltage voltmeter volts welding zinc
Популярні уривки
Сторінка 89 - The common unit of heat is the calorie, which is the amount of heat necessary to raise the temperature of 1 gram of water through 1 degree Centigrade.
Сторінка 385 - REVIEW QUESTIONS. PRACTICAL TEST QUESTIONS. In the foregoing sections of this Cyclopedia numerous illustrative examples are worked out in detail in order to show the application of the various methods and principles. Accompanying these are examples for practice which will aid the reader in fixing the principles in mind. In the following pages are given a larg°...
Сторінка 181 - 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 70 - Ohm's law may therefore be expressed by the following equation: 1= * ~R where /is the current in amperes, E the electromotive force in volts and R the resistance in ohms.
Сторінка 333 - Branly coherer, and by employing a mixture of nickel filings and silver — 90 per cent of the former and 10 per cent of the latter metal.
Сторінка 99 - This unit is practically represented by the unvarying current which, when passed through a solution of silver nitrate in water, deposits silver at the rate of .001118 gramme per second.
Сторінка 187 - No combination fixture in which the conductors are concealed in a space less than one-fourth inch between the inside pipe and the outside casing, will be approved. h. Each fixture must be tested for "contacts...
Сторінка 192 - Must be placed on all service wires, either overhead or underground, as near as possible to the point where they enter the building and inside the walls, and arranged to cut off the entire current from the building. Where the switch required by rule No. 22 is inside the building, the cutout required by this section must be placed so as to protect it.
Сторінка 202 - On side walls the wiring should be protected from mechanical injury by a substantial boxing retaining an air space of one inch around the conductors, closed at the top (the wires passing through bushed holes), and extending not less than seven feet above the floor.
Сторінка 193 - ... the wires ; that is, in a two-wire system the two wires, and in a three-wire system the three wires, must be protected by the cut-out and disconnected by the operation of the switch or circuit breaker.