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Beavertail Lighthouse Museum Association (BLMA)
Address : PO Box 83
City : Jamestown
State : Ri
Zip : 02835
Country : U.S.A.
Phone : (401) 423-3270
Website : http://www.beavertaillight.org
Contact Person : The Secretary
Association Information
Association Activity : In early times, people built bonfires or set blazing torches along the shoreline to alert sailors to approaching dangers and their location. With the advent of lighthouses, ground-level warnings were replaced by beacons, illuminated with whale oil or lard. The Keeper not only made sure that the lamp was lit, but the smoke residue required continuously cleaning of the lenses so that the flame could be seen far out to sea.

In 1748, Georges de Buffon began to re-design the expensive, cumbersome lens; in 1822, a French Physicist named Augustin Fresnel invented a less- expensive, lightweight lens. An open flame or a flame with reflectors behind it lost up to 83% of its light. His invention dramatically retained all but 17% of its light. Frensel lenses became the # 1 system along the seacoasts of Europe and America.

Seven types, or "orders" of the Frensel lens were created; each shaped like a beehive with a light m the center. The curved, concentrate rings of glass prisms were designed to " bend " the light into a very narrow beam which could easily cast its light 20 or more miles to the horizon.

Three "large" orders were developed for use along seacoasts around the world. A three-and-a-half order was used mostly in the Great Lakes. The smaller orders were used for harbors or bay lights.

The original 3rd Order Fresnel lens imported from France in 1856 was replaced with a smaller, 3" Order lens in 1907. In 1991 an automated rotating beacon was installed in its place. Thus, the Fresnel lens now on display at the Museum serves as a constant reminder that it honorably served "the men who go down to the sea in ships.
 
Lighting & Lamps Associations in U.S.A.
American Lighting Association (ALA), Dallas, U.S.A.
International Association of Lighting Designers (IALD), Chicago, U.S.A.
The International Association of Lighting Designers (IALD), Chicago, U.S.A.
Lighting & Lamps Associations in World
Association Of Lighting Designers (ALD), Oxford, U.K.
Association Of Swedish Light Designers (ASLD), Stockholm, Sweden
Bombay Light & Stove Merchants' Asson., Mumbai, India
China Light Industry Mold & Die Association, Beijing, China
China National Light Industry Council, Beijing, China
International Light Association (ILA), Antwerpen, Belgium
Japan Electric Lamp Mfrs. Association, Tokyo, Japan
Japan Electric Lamp Mfrs. Co-operation, Tokyo, Japan
Japan Light Metal Association, Tokyo, Japan
Professional Lighting And Sound Association (PLASA ), Eastbourne, U.K.
Qld Blue Light Association (QBLA), Brisbane, Australia
Singapore Lighter Owner's Assn. Godown, Singapore
Tokyo Light Metal Merchants Association, Tokyo, Japan
Windsor Light Opera Association (WLOA), Windsor, Canada
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