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RCA was also a pioneer in the introduction and development of television, both black and white and especially color television. Throughout most of the company's existence, RCA was closely identified with the leadership of David Sarnoff. He became general manager at the company's founding, served as president from 1930 to 1965, and remained ...
Diagram of the electric fields (blue) and magnetic fields (red) radiated by a dipole antenna (black rods) during transmission More complex antennas increase the directivity of the antenna. Additional elements in the antenna structure, which need not be directly connected to the receiver or transmitter, increase its directionality.
There are about 186,000 ceramic rods in the building. [3] [23] [40] The rods, measuring 1 + 5 ⁄ 8 inches (41 mm) in diameter, are mounted about 2 feet (0.61 m) in front of the curtain wall [41] [42] and are carried on aluminum "combs". [38] The rods are made of aluminum silicate, a ceramic chosen for its durability and cost-effectiveness. [35]
Sash curtains are used to cover the lower sash of the windows. Rod pocket curtains have a channel sewn into the top of the fabric. A curtain rod is passed through the channel to hang. [15] Thermal or blackout curtains use very tightly woven fabric, usually in multiple layers. They not only block out the light, but can also serve as an acoustic ...
The safety curtain or fire curtain is used to separate the stage from the audience in case of a fire onstage. It may be made of heavy fireproofed fabric or solid steel sheet. Some were made of asbestos cloth. After several deadly theater fires in the early 1900s, safety systems were developed to isolate the stage, direct smoke away from the ...
The new engine block maintains the same bore and stroke, but the connecting rods were lengthened and the block deck was raised by 8.4 mm to reduce piston side-loads. 80% of the internal components have been strengthened or redesigned to handle the increased 7,500 rpm red line, along with the use of larger crank bearings with main bearing caps ...
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