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Tourmobile was a sightseeing company that operated in Washington DC from 1969 until 2011. [2] [3] The company was founded as a subsidiary of Universal Studios with three buses and grew to become an independent company carrying more than 700,000 passengers per year at $32 per ticket on its fleet of 45 vehicles. [4]
A DC motor is an electrical motor that uses direct current (DC) to produce mechanical force. The most common types rely on magnetic forces produced by currents in the coils. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor.
Thomas Davenport (July 9, 1802 – July 6, 1851) was a Vermont blacksmith who, with his wife Emily, constructed the first American DC electric motor in 1834. [ 1 ] Biography
In the USSR, per GOST 2582-72 with class N insulation, the maximum temperatures allowed for DC motors were 160 °C for the armature, 180 °C for the stator, and 105 °C for the collector. [13] The one-hour rating is typically about 10% higher than the continuous rating and is limited by the temperature rise in the motor.
A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source and utilizing an electric brush for contact. Brushed motors were the first commercially important application of electric power to driving mechanical energy, and DC distribution systems were used for more than 100 years ...
Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force is produced.
“The risk of getting the H5N1 bird flu virus from eggs is minimal to none, and safe storage and cooking of eggs reduces any potential risk,” says Geeta Sood, M.D., ScM, assistant professor of ...
The large brown molded-plastic piece in the foreground supports the brush guides and brushes (both sides), as well as the front motor bearing. A field coil is an electromagnet used to generate a magnetic field in an electro-magnetic machine, typically a rotating electrical machine such as a motor or generator.
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