Educational film guide ()

621.38-621.384 EDUCATIONAL FILM GUIDE 621.38 Electric communication. Electronics ADVENTURES IN RESEARCH. Modern 20min sd loan 621.38 Jh-sh-c-tr Sponsored by the Westinghouse Electric Corp. Dr Phillips Thomas gives a lecturedemonstration in the realm of electronics, principally radar BASIC ELECTRONICS. USAirForce 17min sd color loan 621.38 Jh-sh-c-tr-ad A training film CAPACITANCE. Castle 31min sd (Radio technician training) $37.28 621.38 sh-tr-ad Produced by the U.S. Navy Demonstrates the flow of electrons thru a circuit and shows the changing and discharging of condensers. The variations of a charge on a condenser in relation to time and the behavior of capitance with alternating current are discussed CATHODE RAY TUBE— HOW IT WORKS. * Castle 15min sd $20.68 621.38 sh-c-tr Produced by the U.S. Navy Demonstrates the construction and function of each part of the cathode-ray tube and how it produces visual images on a screen DEVELOPMENT OF COMMUNICATION. EBF 1942 llmin sd (General science ser) $45, rent $2.50 621.38 Jh-sh-c-ad Guide Shows the inventions which made possible instantaneous communication '•In this picture the most important aspects of the long story of man's human communication are shown. Not only are the devices of communication shown, but the social, cultural and economic effects upon human living of these devices are clearly presented." Georgia THE DIODE. CasUe 1945 17min sd $29.29 * 621.38 sh-c-tr Guide Produced by U.S. Office of Education. Accompanying fllmstrip $1 Explains the principles of electron flow across a gap; basic features of the diode tube; control of electron flow in the tube; photoelectric cells; X-ray tubes; and the diode as a rectifier ELECTRONICS AT WORK. Westinghouse 1943 20min sd loan 621.38 sh-tr-ad Explains the six basic functions of electronic tubes and shows how each type of tube is used in some of the latest industrial and military applications Animated drawings showing tube construction are used to explain how the cathode, anode and grid elements rectify, amplify, generate, control, transform light into electric current and transform electric current into light Precipitron, radio, and radio-telephony, high frequency induction heating, resistance welding control, television and industrial and medical X-ray are a few of the electronic devices which are illustrated and described to show how the tubes perform in the various applications MODERN ALADDIN'S LAMP. WesternElec 1940 20min sd loan 621.38 Jh-sh-c-tr-ad Lowell Thomas is the narrator. The film traces the development of the vacuum tube. It shows in detail how it is made and pictures its many applications in everyday life with particular reference to its use as a repeater tube In telephone circuits PRINCIPLES OF GAS-FILLED TUBES. Castle 15min sd $27.15 621.38 sh-c-tr-ad Guide Produced by the U.S. Office of Education. Accompanying fllmstrip $1 Explains the theory of ionization applied to gas-fllled tubes; control of current in circuits employing gas-fllled tubes; etc. SEARCHLIGHT ON THE NATIONS. PON 1949 20min sd $42, rent $3 621.38 Jh-sh-c-ad A Films of the Nations release. Produced by World Today Inc. for the United Nations Film Board Deals with the international exchange of information thru modern communications such as press, radio, film and telefoto. Men are still separated from each other — half the human race does not yet have the ears to hear. This film tells how the United Nations is worldng to break down these barriers to progress THE TRIODE: AMPLIFICATION. Castle 1946 ♦ 14min sd $25.71 621.38 c-tr Guide Prodced by U.S. Office of Education. Accompanying fllmstrip $1 Reviews the diode principle; compares the diode and triode; explains the triode amplifier circuit, amplification of D.C. voltage changes, amplification of alternating voltages, distortion, and amplification of audio frequency signals VACUUM TUBES. EBF 1943 llmin sd (Physics ser) $45, rent $2.50 621.38 sh-c-tr Collaborator: Wilbur L. Beauchamp, University of Chicago Animated drawings show the way in which vacuum tubes work The three functions of the vacuum tube in radio are explained; how it serves in amplifying current to operate the loudspeaker, how it is used as a rectifier in detection, and how it is used as an oscillator tube in the transmission station to produce the carrier wave VACUUM TUBES: ELECTRON THEORY AND THE DIODE TUBE. Castle 1945 16min sd $22.13 621.38 sh-c-tr-ad Produced by the U.S. Army Air Forces Explains electron behavior in matter, electron sources in vacuum tubes, symbols of tubes, functioning of tube in a circuit, effect of plate voltage changes, space charge, and diode and duo-diode as reflectors 621.382 Telegraph LAYING THE ATLANTIC CABLE. Knowledge Bldrs 1944 llmin sd (Story of civilization) $40, rent $2 621.382 el-Jh-sh-c-tr-ad Scenes aboard a cable layer from Newfoundland to the Azores. Explains depth sounding and shows how a telegraphic cable is constructed and held 621.384 Radio NATURALLY IT'S FM. GB 1947 17mln sd color loan 621.384 Jh-sh-c-tr-ad Explains the differences between AM and FM radio broadcasting and the advantages of the latter 438