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Lamp Trivia

Forum to discuss all areas of lighthouse technology such as optics, fuels, fog signals, radiobeacons, daymarks, construction, etc.

Postby island » Wed May 04, 2005 5:27 am


Tom and Terry have been posting real "mean" trivia questions on here so I thought I would post this easy one.

The Argand lamp was a step forward in lighthouse technology. This lamp and later lamps of similar design contained a feature that not only enhanced illumination but also significantly reduced the work of keepers. What was this feature?
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Postby Zachary » Wed May 04, 2005 5:32 am


The flame was enclosed in glass to keep it from going out? (I'm just taking a shot in the dark)
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Postby bert911 » Wed May 04, 2005 8:56 am


Argand's lamps incorporated a hollow wick?

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Postby Hersh » Wed May 04, 2005 10:12 pm


larger fuel reserviors ??
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Postby island » Thu May 05, 2005 7:40 am


A larger fuel storage would be an advantage to the keeper if it reduced the number of trips up and down the tower to replenish the lamp fuel supply and less frequent filling of the individual lamps.

The circular or hollow wick served primarily to provide more combustion surface in a small area with more concentrated flame produced than would be possible with a flat wick, thus more illumination from a smaller size lamp.

The glass chimney by virtue of the “chimney effect” causes more combustion air to flow uniformly up into the lamp to feed the flame. This enables more complete combustion of the lamp fuel with the result being significantly greater illumination intensity with less smoke and oily soot produced to coat and cover glass and metal surfaces inside the lantern, thus less daily lantern cleaning required of the keeper.
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