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The Bradley & Hubbard Manufacturing Company (1852–1940) was formed in Meriden, Connecticut, and over the years produced Art Brass tables, call bells, candlestick holders, clocks, match safes, lamps, architectural grilles, railings, etc. Overall the company patented 238 designs and mechanical devices. "By the 1890s, the Bradley and Hubbard ...
The Crusie lamp consists of two lamp pans, one above the other. Fuel drip from the upper lamp pan fell into the lower pan minimizing oil/grease mess below the lamp. In the evolution to the Betty lamp, replacing the upper lamp pan with a metal wick holder inside the lower pan reduces the amount of metal needed for the lamp.
anodized stainless steel test plate (molybdate based solution) 7.5 g of sodium dichromate , 1000 mL of sulfuric acid (1.24 g/cm 3 ), lead cathodes, object as an anode, 70-90 °C temp, 0,06 A/dm 2 , voltage 1.3 V – colors depend on the duration of the procedure (5-50 min.), brown, blue, reddish brown, yellow, green.
A 2020 review noted that the mortality rate of fractal wood burning cases was "significant" and "exceedingly high". [7] The American Association of Woodturners has, on safety grounds, banned any demonstrations or sales related to the practice at its events, strongly discourages any of its chapters from promoting the practice, and refuses to ...
Oxide jacking has caused concrete spalling on walls of the Herbst Pavilion at Fort Mason Center in San Francisco. The expansive force of rusting, which may be called oxide jacking or rust burst, is a phenomenon that can cause damage to structures made of stone, masonry, concrete or ceramics, and reinforced with metal components.
Came glasswork includes assembling pieces of cut and possibly painted glass using came sections. The joints where the came meet are soldered to bind the sections. When all of the glass pieces have been put within came and a border put around the entire work, pieces are cemented and supported as needed. [1]
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The andon is a lamp consisting of paper stretched over a frame of bamboo, wood or metal. [1] The paper protected the flame from the wind. Burning oil in a stone, metal, or ceramic holder, with a wick of cotton or pith, provided the light. They were usually open on the top and bottom, with one side that could be lifted to provide access. [2]