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Show magnetic fields; reluctance, permability and flux density; magnetic circuits and magnetic applications. (3). 83. Armature WindingVoltage in a rotating coil; lap and wave winding; paths and multiplicity; selection of type of winding; slots, segments, coils, and pitch, and armature testing. (3). 84. Direct Current Motors, Generators and Controllers Principles of the motor torque, power, and armature reaction; series, shunt, and compound motors; speed regulation and rotation of motors; construction of generators; methods of field excitation ; commutation and commutating poles; series, shunt, and compound generators manual and magnetic controllers; low voltage and overload protection; dynamic braking and reversing controllers. (3). 85. Alternating Current and Circuits Generation of a sine wave; average and effective values; vector representation; resistance, inductance, and capacity in series and parallel circuits ; impedance, resonance, and power factor problems and correction; power and reactive power in AC circuits. AWS (3). 86. Transformers and Polyphase SystemsEfficiency of transmission; transformer principles and construction; types of transformers; losses and efficiency; two- and three-phase systems; star and delta connections three-phase, four-wire systems; polyphase transformers and induction regulators. (3). 87. Alternating Current MotorsRotating magnetic field, speed, torque and efficiency; types of AC motors; frequency and rotary converters, and stator windings. 88. Alternators and AC ControllersRevolving field alternators; frequency; types of windings; synchronizing and paralleling alternators, and field excitation and load. Across the line, drum, and reversing controllers; interlocks, limits, and low-voltage controls plugging and time-delay relays; compensators and multi-speed controllers. (3). 89. Electrical Instruments Permanent magnet, electro-dynamic, iron vane inclined coil, and induction-type instruments; sensitivity and connection of instruments; types of indicating meters; watt hour and reactive power indicating and intergrading meters; meter shunts, resistors, and reactors. A W S (3). 90. Industrial ElectronicsBasic tube functions; types of emission; types of tubes, diodes, triodes, tetrodes, pentodes, and beam power tubes; replacement characteristics; amplifiers; amplidynes oscillators; high frequency and dialectric heating; types of power tubes; electronic relays. AWS (3). 316 91. Welding Systems and Electronic Motor ControlReducing current fluctuations; constant-voltage generators; arc, resistance, spot, and projection welding; control of welding igni-tron tubes; non-synchronous and synchronous welders; constant heat, aluminum, magnetic, and capacitor; seam weldintr controls. A W S (3). 92. Automation and InstrumentationServo-mechanisms; amplifier circuits; capacitance control circuits; cathoderay control circuits; counting circuits; measuring circuits; timing circuits; photo electric circuits; automatic control theory; miscellaneous industrial instruments. AWS (3). MACHINE TOOL Courses of Instruction 050. Gun Repair (General Shop)Leisure-time activity offered to acquaint the student with procedures involved in blueing, manufacture of small parts and accessories; repair of stocks, barrels and trigger mechanisms. (1). 71. Machine ToolFundamentals of lathe operation, such as tool grinding, setting up apparatus, chucking work, center drilling, radii and fillet forming, knurling, external threading, drilling, boring, reaming and taper turning. Continued courses will include drilling machines, milling machines, metal sawing and grinders. (3). 72. Machine ToolContinuation of Machine Tool 71. (3). 73. Machine ToolContinuation of Machine Tool 72. (3). 74. Machine ToolContinuation of Machine Tool 73. (3). 75. Machine ToolContinuation of Machine Tool 74. (3). 76. Machine ToolContinuation of Machine Tool 75. (3). WATCHMAKING Courses of Instruction 071. Watchmaking (General Laboratory) Leisure-time activity. Practice of watch repair, including bench work, lathe work, clock mechanisms, and lever escapements. Individual instruction is given. AWS (3). 71. Watchmaking General practice of watch repair. Bench work, lathe work, clock mechanisms, lever escapements, hair springs, bezel jeweling, dial train, and setting mechanism of watches. Each unit of work is practiced and studied separately. A WS (3). 72. WatchmakingContinuation of Watchmaking 71. (3). 317 |
