Educational film guide ()

1949 EDITION 621.3-621.31 LIGHT AND POWER— Continued leasing atomic energy. It also demonstrates the Interrelationship between science and society; from social needs have been born the great inventions which have reacted upon society, altering its shape, creating, in turn, new needs WORLD'S LARGEST ELECTRICAL WORKSHOP. GE 1942 30min sd loan 621.3 Jh-sh-c-ad An intimate glimpse into America's largest electrical workshop, where General Electric scientists, engineers, and craftsmen contribute to the art of better living and to the protection of democracy in the forward march of electricity. Drs Liangmuir, Whitney, and Coolidge are shown in their laboratories. "Testmen," the engineers of tomorrow; "Apprentices," the operators of tomorrow's machines; and the mammoth plants and equipment which manufacture G-B products — all are seen in action in the film. A trip through several of the major factories of the General Electric company, including the Schenectady, Bridgeport, Ft. Wayne, Erie, and Lynn Works. Commentary by Alois Uavrilla 621.31 Generation of eiecfrlcity. Electric motors D.C. MOTOR— PART I: MECHANICAL OVERHAUL. Castle 1946 20min sd $32.16 621.31 tr Guide Produced by the U.S. Office of Education. Accompanying fllmstrip $1 Shows how to test for electrical and mechanical faults; how to dismantle D. C. motor and to record data; how to turn the commutators; how to clean and recondition parts; how to repair and replace field coils; how to assemble the motor; and how to adjust and make final tests on motor before returning to service D.C. MOTOR— PART II: REWINDING. Castle 1946 37min sd $50.44 621.31 tr Guide Produced by the U.S. Office of Education. Accompanying ffimstrip $1 Shows how to dismantle and clean an armature core; how to determine commutator pitch; how to reinsulate the core; how to insert coils; how to band an armature; how to shape coil ends; how to lay in and solder leads; how to balance the armature; how to Impregnate the armature; and how to turn a commutator DIRECT CURRENT CONTROLLERS. Castle 1946 15mln sd $27.15 621.31 tr Guide Produced by the U.S. Office of Education. Accompanying filmstrip $1 Shows shunt motors and direct current controllers in operation and by animation, a direct current faceplate controller connected to a shunt motor ELECTRICAL CIRCUIT FAULTS. Castle 19min sd $30.74 621.31 tr Guide Produced by the U.S. Office of Education. Accompanying filmstrip $1 Shows how to test for and locate common circuit faults; and how to test for and locate grounds, resistance deterioration, and Interference in circuits ELEMENTS OF ELECTRICAL CIRCUITS. EBP 1943 llmin sd (Physics ser) $45, rent $2.50 621.31 sh-c Guide Collaborator: Morris Melster, High School of Science, New York City "ReveaJs the nature of electric currents and circuits. Electron motions, conductors. Insulators and factors affecting resistance are a few of the subjects explained through animated drawings and photographic demonstrations." Scholastic IMMORTAL BLACKSMITH. TFC lOmIn sd * (Passing parade) apply 621.31 Jh-sh-tr Produced by Metro-Goldwyn-Mayer The story of Tom Davenport, the Vermont blacksmith, whose experiments made possible the modern electric motor PRINCIPLE OF THE GENERATOR. Young America 1949 lOmin sd $40 621.31 jh-sh-c-tr-ad Guide Produced In Great Britain Uses animation to explain the elementary principles of electromagnetic induction In simple terms. These principles are then related to the operation of the generator which supplies electric current to homes and factories REDUCED VOLTAGE STARTERS. Castle 23min sd $35.16 621.31 sh-tr Guide Produced by U.S. Office of Education. Accompanying fllmstrip $1 Explains the principle of the transformer and shows the operation of a manual starting compensator, thermal overload relay, and automatic starting compensator REPULSIONINDUCTION MOTOR— GENERAL OVERHAUL. Castle 25min sd $37.32 621.31 sh-tr Guide Produced by U.S. Office of Education. Accompanying fllmstrip $1 Shows how to check a repulsion-induction motor for electrical and mechanical faults; how to dismantle and how to assemble and lubricate a repulsion-motor REPULSION MOTOR PRINCIPLES. Castle 18min sd $30.01 621.31 sh-tr Guide Produced by U.S. Office of Education. Accompanying fllmstrip $1 Explains construction of repulsion motor; rotor circuits and effect of brush position; short-circuiting and brush-lifting mechanism; and applications of repulsion motors "°''"^'''L(H.°.'^AQNETIC FIELDS. CasUe 13min sd $23.60 621.31 tr Guide Produced by the U.S. Office of Education. Accompanying fllmstrip $1 Explains a rotating magnetic field pattern; traces the three-phase winding in a demonstration stator; shows the factors that cause rotation of the magnetic field, and the construction of polyphase motors SERIES AND PARALLEL CIRCUITS. EBF 1944 llmin sd (Physics ser) $45, rent $2.50 621.31 sh-c-tr Guide Collaborator: Morris Melster, High School of Science, New York City Takes up the relationship between resistance, current and voltage In series circuits and then in parallel circuits. The practical advantages and disadvantages of each circuit is illustrated and clarified with common examples A simple series-parallel combination Is described and explained SINGLE PHASE AND POLYPHASE CIRCUITS. Castle 17min sd $29.29 621.31 tr Guide Produced by the U.S. Office of Education. Accompanying fllmstrip $1 Explains a single-phase synchronous generator, the use of sine curves to illustrate flow changes, a two-phase system and threephase system; and shows ways to simplify wiring in the two-phase and three-phase systems 435