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Adak Alaska USA 1943 stock footage and images
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Flooding in Williamsport, Maryland; Point Of Rocks, Maryland; and Washington DC from great Potomac River flood of 1936
Damage caused due to flooding of Potomac River near Williamsport, Maryland. Houses and buildings submerged in water. Destroyed buildings. Remains of a segment of a trestle bridge across the Potomac River at Point Of Rocks Maryland, with flood waters all around. Ticker tape warning of the flood is shown running throw a persons hands. Warnings issued by the weather bureau for the people. Members of the CCC (Civilian Conservation Corps) and others build a sandbag barrier to protect Federal buildings against the impending flood. View of the sandbags being put in place and the Washington Monument in the background. View of high flood waters at Great Falls and along other spots on the Potomac River carrying debris including houses and sheds. A trestle bridge over the water. Several people standing on the bridge as flood waters rip a support from the bridge and water is nearly overtaking the bridge. View on March 19 near the time the water crested at 19 and eight tenths feet at the site of the old Aqueduct Bridge or Aquaduct Bridge (near Key Bridge and Fletchers Boathouse) Industrial buildings flooded on the shores of the Potomac River. (Great Depression period)
The John Paul Jones monument and the Titanic Memorial inundated by flood waters during great Potomac River flood of 1936.
Damage caused due to Potomac River flood in Washington DC., United States. The John Paul Jones monument in Potomac Park amidst the flood affected area. Area submerged in water. Damaged cherry trees near Tidal Basin, overrun by water. View of the damaged area and harbor looking out toward Haynes Point, as seen from atop the Washington Monument. The Titanic Memorial amidst the flooded area. Giant flagstones near the Titanic Memorial dislodged and scattered by flood waters. People walking near the parkway. View of unscathed Federal buildings in downtown Washington DC and 1930s era automobiles on the street.
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.
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