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Crown glass. Crown glass was an early type of window glass. In this process, glass was blown into a "crown" or hollow globe. This was then transferred from the blowpipe to a punty and then flattened by reheating and spinning out the bowl-shaped piece of glass (bullion) into a flat disk by centrifugal force, up to 5 or 6 feet (1.5 to 1.8 metres) in diameter.
Bullseye Glass is a glass manufacturer in Brooklyn, Portland, Oregon, in the United States. [1] [2] The company is a significant supplier of raw art glass for fused glass makers. [3] According to Art Glass Magazine, production controls at Bullseye's U.S. plant is more consistent than imported products, allowing it to fuse reliably. [4]
Bull's-eye window may refer to: Oeil-de-boeuf, an ornamental window with a circular frame; A window made from crown glass; Porthole, a circular nautical window; Oculus (architecture), a skylight at the top of a dome
Window glass company founded by former secretary and plant manager of Hartford City Glass Company, J. R. Johnston. Also made ornamental, bent, and chipped glass. [31] Employee count of 200 for 1903. [16] 12: Jones Glass Company Hartford City 1898 1899 60 Window glass factory began in 1898 with a foreign workforce, [32] and employed 60. [28]
The melted batch, or metal, is typically shaped into the glass product (other than plate and window glass) by either glassblowing or pressing it into a mold. [7] Glass was not pressed in the United States until the 1820s. [8] Until the 20th century, window glass production involved blowing a cylinder and flattening it. [9]
Glass block, also known as glass brick, is an architectural element made from glass used in areas where privacy or visual obscuration is desired while admitting light, such as underground parking garages, washrooms, and municipal swimming baths. Glass block was originally developed in the early 1900s to provide natural light in industrial ...
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Crown glass is a type of optical glass used in lenses and other optical components. It has relatively low refractive index (≈1.52) and low dispersion (with Abbe numbers between 50 and 85). Crown glass is produced from alkali-lime silicates containing approximately 10% potassium oxide and is one of the earliest low dispersion glasses .
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