Electrician's Mate 3U.S. Government Printing Office, 1949 - 357 pages |
Expressions et termes fréquents
adjusted ampere-hours amperes armature coils armature current armature reaction automatically battery blueprint brushes BUS BAR cable called cause cell chapter circuit breaker commutator compartment Complete the following conductor contactor copper current flow current-carrying d-c motor deck direct current drawing drum electrical equipment Electrician's Mate electrolyte electromotive force feed field coils field current field flux field poles field resistance following statements full load hand rule heat increase induced emf installed insulation isometric lamp Lenz's law light line voltage lines of force loop lubrication machine magnetic circuit magnetic field magnetic lines magnetomotive force motor speed Navy negative carbon neutral north pole Ohm's law ohms operation output overload panel plates positive carbon produce reflector resistor reverse rheostat rotation searchlight series field series motor shaft ship shown in figure shunt field solenoid starter starting switch switchboard tion torque voltage drop VOLTAGE REGULATOR volts windings wiring diagrams
Fréquemment cités
Page 299 - A complete deck below the main deck is called the second deck. Where there are two or more complete decks below the main deck, they are called the second deck, third deck, fourth deck, etc.
Page 9 - Stated another way, the current in a circuit is directly proportional to the applied voltage and inversely proportional to the circuit resistance.
Page 299 - A partial deck below the lowest complete deck shall be called the " platform deck." Where there are two or more partial decks below the lowest complete deck, the one immediately below the lowest complete deck shall be called the " first platform ;" the next shall be called the " second platform,
Page 51 - If the conductor is grasped in the left hand with the thumb pointing in the direction of current flow as shown in Fig.
Page 69 - In these two diagrams you will note that the direction of the induced current depends on the direction of the magnetic field. CONOUCTOR MOTION CONOUCTOR MOTION (A) IB) Fig. 64. Magnetic Field Reversal — Induced EMF Reversed. This makes three directions involved in the process of inducing an emf: 1.
Page 198 - Noises. 34. Armature or pulley out of balance. — Faulty construction; armature and pulley should have been balanced when made. May be helped by balancing on knife edges now.
Page 175 - If the motor has a light shunt winding (one sufficient to keep the no-load speed within certain limits) and a heavy series winding, it will have the characteristics of a series motor, but will not run at a dangerous speed with light loads. Compound motors are used for driving machines that demand a fairly constant speed and are subject to irregular loads or sudden applications of heavy loads, such as presses, shears, compressors, reciprocating tools, and elevators.
Page 61 - The flux is directly proportional to the magnetomotive force and inversely proportional to the reluctance of the circuit.
Page 197 - A. See that foundation is level and armature has free end motion. B. If there is no end motion, file or turn ends of boxes or shoulders on shaft to provide end motion. C. Then line up shaft and belt, so that there is no end thrust on shaft, but...
Page 77 - LENZ'S LAW. In all cases of electro-magnetic induction, the direction of the induced currents is such as to tend to stop the motion producing them.