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The electric fire was invented in 1912 [2] and became popular in the 1950s. [3] Electric fireplaces found in 1950s homes were typically small and could be easily moved. [4] Techniques for electrical "flame effects" have been around since at least 1981. [5] Commercial electric fireplace techniques include the Optiflame, introduced in 1988 by ...
The first major development in diamond cutting came with the "Point Cut" during the later half of the 14th century: the Point Cut follows the natural shape of an octahedral rough diamond crystal, [2] eliminating some waste in the cutting process. Diamond cutting, as well as overall processing, is concentrated in a few cities around the world.
The diamond cutting process relies heavily on this directional hardness, as without it a diamond would be nearly impossible to fashion. Cleavage also plays a helpful role, especially in large stones where the cutter wishes to remove flawed material or to produce more than one stone from the same piece of rough (e.g. Cullinan Diamond). [8]
Chang Type Industrial Co. Ltd., a Taiwan-based manufacturing company, has agreed to purchase the Delta brand of woodworking equipment and machinery from Stanley Black & Decker. McKenna, Tom (2011-01-17). "Updated: Stanley Sells Delta Tools to Taiwanese Company". finewoodworking.com. The Taunton Press, Inc. Archived from the original on 2011-01-19
These diamond saws and good jewelry lathes enabled the development of modern diamond cutting and diamond cuts, chief among them the round brilliant cut. In 1919, Marcel Tolkowsky analyzed this cut: his calculations took both brilliance (the amount of white light reflected) and fire into consideration, creating a delicate balance between the two ...
Wavy set and milled teeth will cut most metals as well as plastics. A side set and milled tooth works with fast and rougher cuts in wood and plastics. A ground and taper-ground tooth is for precise, fine and clean cuts in wood. There are also blades with reduced-kerf carbide and diamond grit edges for fast cutting in hard materials. [citation ...
DWC is also practical and less expensive than some other cutting techniques, for example, thin diamond wire cost around 10-20 cents per foot ($0.7/m) in 2005 for 140 to 500 micrometer diameter wire, to manufacture and sells around $1.25 a foot ($4.10/m) or more, compared to solid diamond impregnated blade cutters costing thousands of dollars.
Schroeter began building wood-burning stoves in his garage, which soon evolved to a cast iron frame with a glass door. This invention was the first of its kind, allowing the user to see the fire inside the stove. [6] In the 1980s and early 1990s, Napoleon's wood stoves were distributed across Canada and the United States. [7]
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