Argand lamp

The Argand lamp is a type of oil lamp invented in 1780 by Aimé Argand. Its output is 6 to 10 candelas, brighter than that of earlier lamps. Its more complete combustion of the candle wick and oil than in other lamps required much less frequent trimming of the wick.

An Argand lamp in use
Argand lamp with circular wick and glass chimney. Illustration from Les Merveilles de la science (1867–1869) by Louis Figuier.

In France, the lamp is called "Quinquet", after Antoine-Arnoult Quinquet, a pharmacist in Paris, who used the idea originated by Argand and popularized it in France. Quinquet sometimes is credited with the addition of the glass chimney to the lamp.[1]

Design

The Argand lamp had a sleeve-shaped wick mounted so that air can pass both through the center of the wick and also around the outside of the wick before being drawn into a cylindrical chimney which steadies the flame and improves the flow of air. Early models used ground glass which was sometimes tinted around the wick.

An Argand lamp used whale oil, seal oil, colza, olive oil[2] or other vegetable oil as fuel which was supplied by a gravity feed from a reservoir mounted above the burner.

A disadvantage of the original Argand arrangement was that the oil reservoir needed to be above the level of the burner because the heavy, sticky vegetable oil would not rise far up the wick. This made the lamps top heavy and cast a shadow in one direction away from the lamp's flame. The Carcel lamp of 1800, which used a clockwork pump to allow the reservoir to sit beneath the burner, and Franchot's spring-driven Moderator lamp of 1836 avoided these problems.

The same principle was also used for cooking and boiling water due to its 'affording much the strongest heat without smoke'.[3]

History
An astral lamp, an Argand lamp designed so that the reservoir does not cast a separate shadow

The Argand lamp was introduced to Thomas Jefferson in Paris in 1784 and according to him gave off "a light equal to six or eight candles."[4]

These new lamps, much more complex and costly than the previous primitive oil lamps, were first adopted by the well-to-do, but soon spread to the middle classes and eventually the less well-off as well. Argand lamps were manufactured in a great variety of decorative forms and quickly became popular in America.[5] They were much used as theatrical footlights.[6]

It was the lamp of choice until about 1850 when kerosene lamps were introduced. Kerosene was cheaper than vegetable oil, it produced a whiter flame, and as a liquid of low viscosity it could easily travel up a wick eliminating the need for complicated mechanisms to feed the fuel to the burner.

gollark: There are multiple kinds of tech enthusiast.
gollark: A lot of the time you're just doing boring drudgery integrating other already-existing things, which will soon be significantly automated I think. Sometimes you actually need to spend time thinking about clever algorithms to do a thing, or how to make your thing go faster, or why your code mysteriously doesn't work, which is harder.
gollark: It's mentally challenging, sometimes, but obviously not particularly physically hard.
gollark: There are lots of cool applications now. Automatic generation of art, protein folding, human-level competitive programming, good OCR.
gollark: Ah, but it's *very complicated* curve fitting which can sometimes do interesting things.

See also
  • Bude-Light: a very bright vegetable oil lamp that works by introducing oxygen into the centre of an Argand burner.
  • Lewis lamp

Notes
  1. "Lamp." Columbia Electronic Encyclopedia, 6th Edition (2011): 1. Academic Search Premier. Web. 5 December 2011.
  2. "Lamp." Encyclopædia Britannica: or, a dictionary of Arts, Science, and Miscellaneous Literature. 6th ed. 1823 Web. 5 December 2011
  3. An Encyclopędia of Domestic Economy:Comprising Such Subjects As Are Most Immediately Connected with Housekeeping. 1844. p. 841.
  4. Crowley, John E. The Invention of Comfort: Sensibilities & Design in Early Modern Britain & Early America. Baltimore, MD: Johns Hopkins UP, 2000. Web. 5 December 2011
  5. McCullough, Hollis Koons. Telfair Museum of Art: Collection Highlights. McCullough, Hollis Koons. Telfair Museum of Art: Collection Highlights. Savannah, GA: Telfair Museum of Art, 2005.Web. 5 December 2011
  6. Banham, Martin (7 March 1996). The Cambridge Paperback Guide to Theatre. Cambridge University Press. ISBN 978-0-521-44654-9.

References
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.