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Also within the bulb were metal sculptures coated with phosphors. These phosphors fluoresced when excited by glow discharge. Because glow discharge occurs readily at 110-120 volts AC, one could use these bulbs in standard household lamps in the United States. The phosphors used in the bulbs were somewhat brittle, necessitating care in handling.
The bulb is usually made from Pyrex or synthetic quartz. Incandescent lamps also have a base. The base screws into a socket and serves as an electrical contact point for the socket and the filament inside. For the most part, higher watt bulbs will use larger bases. Incandescent bulbs for stage lighting may have pins on the bottom instead of a ...
Compact fluorescent mogul-base bulbs are also available, as are adaptors to allow medium-base bulbs to be used in mogul sockets. There are usually two three-way switches near the top of the floor lamp to operate the bulbs. One controls the three-way center bulb, and the other turns on one, two, or all three (or four) of the peripheral bulbs.
Duffner & Kimberly was a New York City company which produced leaded glass and bronze lamps around the same time as Louis Comfort Tiffany, Tiffany Studios. The Duffner & Kimberly Company was formed in December 1905, with a capital outlay of $350,000. The firm introduced its first lamps in 1906. [1]
The Edison United Manufacturing Company was incorporated in July 1886 to consolidate the sales operations of the various Edison manufacturing concerns. The company went into liquidation—finalized October 31, 1889—and was succeeded by the United Edison Manufacturing Company, incorporated in New York City under New York state law in May 1889. [1]
A 2010 article in The New York Times noted that some restaurants were hanging hundreds of Edison light bulbs from their ceilings, stating: "Whether in hip hangouts tapping into the popular Victorian industrial look or elegant rooms seeking to warm up their atmosphere, the bulb has become a staple for restaurant designers, in part because it ...
The glass bulbs sold in Britain were of Swan's design, while the filaments were of Edison's. [4] From 1887 or earlier Sir Ambrose Fleming was an adviser to the company, and conducted research at Ponders End. [5] The company had offices at 155 Charing Cross Road, London, and factories in Brimsdown, Ponders End and Sunderland.
The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...