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North Sea 1942 stock footage and images
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The demonstration of the principles of the steam power in the United States.
A film titled: 'The Magic of Steam' depicts the working of the steam turbines in the United States. A woman seated in her room turns the light on. Men work inside a factory. Electric poles in an area. Wires connected from one electric pole to the other. A pie chart depicts the power used for the production of electricity. 65 percent of steam and 30 percent of water being used for the purpose. Men work inside a factory. They work on steam turbine. A man demonstrates the working of a steam turbine using the steam. A man places a tea kettle to heat. Steam arising out of the kettle as the water boils. A paddle wheel is placed near the kettle from which the steam comes out. The wheels start revolving due to the steam. A lid is placed on the kettle. The high pressure of steam lets the wheels to revolve faster and pushes the kettle in the opposite direction. The lid is then removed from the kettle. Another example to demonstrate the concept of steam is that of the fire hoses. Firemen try to control the fire in a building with the help of fire hoses. Men work near a steam turbine in a factory. (World War II period).
The use of steam power by the steam turbine in the United States.
The working of the steam turbines in the United States. A drawing depicts the first stage of the working of the steam turbine. The steam jets strike the blades of the turbine. The blades receive the steam and change their direction. The spindles are driven through the process. A man demonstrates the working of the steam turbine through the tea kettle. A tea kettle is placed to boil the water. The steam comes out of the kettle and revolves the paddle wheel kept nearby. The impulse stage of modern steam turbine being demonstrated. The blades being forced to move due to the pressure of the steam. The direction of steam is changed and it gives more power to the revolving spindles. A man works on the steam turbine. Steam coming out of a tea kettle. The steam moves through stationery blades first and then through the blades in motion. The steam enters from the boiler to the turbine. It then passes through the nozzle. The quantity of the steam at this stage should be constant. The turbine rotates because of the steam and it turns the shaft. The centrifugal force works at this time. The valve in the turbine opens. The small piston moves down. The large piston moves upwards. The force moves the valve. The speed of the turbine is decreased. The quantity of steam is increased and the speed thus increases.
The use of larger blades to allow the proper expansion of steam inside the turbine in the United States.
The working of the steam turbines in the United States. Steam turbines in a factory. The previous steam turbines faced the problems of speed control. The modern steam turbines are thus directed through larger sized blades. The longer and larger blades being used for the expansion of steam efficiently. The blades operate in high ad low pressure. Steam enters from the boiler to the turbine. It is regulated by the control valve inside the turbine. The steam strikes the blades inside the turbine and the blades move. The longer and larger blades allow the steam to expand efficiently. Man works on the steam turbine.
The control of the centrifugal force and oil flow through the turbine in the United States.
The working of the steam turbines in the United States. The reaction and impulse principles used in harnessing the steam power in turbines. The demonstration of the speed of steam in the turbine. A police officer firing his revolver. View of him while he fires his handgun at targets on a firing range. The speed of blades of turbine when they revolve is noticed with the help of gauges. The blades must be anchored properly so that the pressure can be controlled. The control of centrifugal force in the turbine. Men work on the steam turbine. Some maintenance problems arise when high speed turbines are constructed. Careful designing of the steam turbine being done for the control of the great speed of the steam. A high quality oil is needed for lubricating the parts of the turbine. A diagrammatic representation of the working of the auxiliary pump. The working of the oil filter, oil tank, main oil pump driven by the shaft are also represented. The check valve opens and the oil flows in the turbine. The speed of the pump being regulated. The metal surfaces of the turbine never touch each other. They are separated by the film of oil.
Officer explains the procedure and the methodology of working of an air raid warning service in the United States.
A film titled: 'Spread the alarm' on the air raid warning systems and civil defense procedures in the United States during World War 2. A map locates different places. Newspaper headlines about the air raids and bombardment. Officer seated at his desk in the office. He explains the working of the air raid warning service with the help of a diagram. He states that the warnings are reported over telephones. He points at the diagram and explains the procedure. He talks about the radar service to detect the activities of incoming enemy aircraft for the purpose of air raid. As an enemy aircraft is detected, the information is communicated through the telephone lines established for the purpose. The information is disseminated through various warning centers. He also explains the air raid precaution service with the help of another diagram. He says that the rescue team takes care of the damage and the casualties. The district warning centers provide the additional aids to the people.
The liaison between the telephone system and civilian defense units for air raid drills in the United States.
The air raid warning systems in the United States during World War 2. An air drill in Newton, Massachusetts. A Daprato Statuary company building on fire (a drill meant to simulate fire from bombardment.) A warden in uniform reports the bomb damage to the information center. A sign reads: 'Report Center (Telephone Room)'. Men and women work inside the room. A woman talks on the telephone and she notes down the information about the location, time, date and other essential things on a paper. Chief warden and other officials seated in the report center. The report about the bombardment is given to them. The location of damage is planted on a map. They take quick actions and assess the impact and needed response. Messages are relayed by uniformed Boy Scouts standing by. Fire equipment and medical aid is dispatched to the scene. A sign reads: 'District Warning Center'. Public utility representatives stand by to take charge of the repair of water mains, electrical and telephone equipment. A map locates various areas in New England, United States.
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