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This construction led the General Electric Company to use the tradename "Lucalox" for its line of high-pressure sodium lamps. Xenon at a low pressure is used as a "starter gas" in the HPS lamp. It has the lowest thermal conductivity and lowest ionization potential of all the stable noble gases. As a noble gas, it does not interfere with the ...
Robert Louis Coble (January 22, 1928 – August 27, 1992) was an American ceramic scientist, notable for his discovery of Coble creep, the effect that carries his name, and for his invention of Lucalox. [1] [2] [3] Coble was a member of the National Academy of Engineering.
In 1961, General Electric began selling transparent alumina Lucalox bulbs. [11] In 1966, GE announced a ceramic "transparent as glass", called Yttralox. [ 12 ] In 2004, Anatoly Rosenflanz and colleagues at 3M used a "flame-spray" technique to alloy aluminium oxide (or alumina) with rare-earth metal oxides in order to produce high strength glass ...
S54 (Long Island bus) S54 (New York City bus), serving Staten Island; BMW S54, an automobile engine; Prince Skyline (S54), a Japanese sedan; Ronga language, a Bantu language; Shorland S54, a British armoured car; Walbunja language, an Australian Aboriginal language; Toyota S54, a Toyota S transmission model
For example, a 100-watt, 120-volt lamp has a resistance of 144 ohms when lit, but the cold resistance is much lower (about 9.5 ohms). [76] [b] Since incandescent lamps are resistive loads, simple phase-control TRIAC dimmers can be used to control brightness. Electrical contacts may carry a "T" rating symbol indicating that they are designed to ...
Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.
The S54 was marketed as the high performance equivalent to the M54, however it is actually more an evolution of the BMW S50 and shares few parts with the M54. [11] As per the S50, the engine block is made of cast iron, unlike the aluminium engine block used by the M54. [12] Redline is 8,000 rpm. Compared with the S50, the S54 features: [11] [13 ...
Sukhoi then modified the design to allow it to mount the same radar as the Su-27, the Phazotron Sokol.Shown in June 1997, the S-55 was a lighter, shorter-range fighter that complemented the Su-27 in the same way the F-16 complements the F-15.