Object Catalog Record
Images
Metadata
Title |
Fresnel lighthouse lens from Tree Point Light Station |
Object # |
97.1.1.1 |
Object Name |
Lens, Lighthouse |
Date |
1904-1963 |
Description |
Fresnel lighthouse lens from Tree Point Light Station Handmade beehive Fresnel lighthouse lens that came from Tree Point Light Station, mounted on stand |
Provenance |
Light List data Tree Point Light 1906 F W. W15. Obscured eastward of NNW 3/8 W and SE 3/4 E. LHB Light List (Dist. 12-13): 243 1911 F WR. W15, R15. R315.5°-326.5°(11°), W326.5°-155.75°(189.25°). USLHS Light List (16th-18th): NA 1914 F WR. W15, R13. R316°-327°(11°), W327°-156°(189°). USLHS Light List (Pacific): 543 1930-1933 Fl WR 6s. W15, R15. fl 1. R318°-327°(9°), W327°-158°(191°). USLHS Light List (Pacific): 1090 1945 Fl W 6s. W15. fl 1. Obscured 158°-318°(160°). USCG Light List (Pacific): 2088 1950-1951 1952-1960 USCG Light List - Vol. I-V: 2312 1961-1963 USCG Light List - Vol. III: 2312 1964-1970 Fl W 2.5s. W15. Obscured 158°-318°(160°). USCG Light List - Vol. III: 2901 1971-1972 Fl W 6s. W15. fl 1. Obscured 158°-318°(160°). 1973-1974 Fl W 6s. W9. fl 1. Obscured 158°-318°(160°). 1975-1984 Fl W 6s. W9. Obscured 158°-318°(160°). USCG Light List - Vol. III: 2943 1985 USCG Light List - Vol. VI: 2943 1986 USCG Light List - Vol. VI: 21840 1988 1990 2004 Old exhibit label: Lighthouse Lens This 3rd order Fresnel lens came from the Tree Point Light Station, which was located at the entrance to Revillagigedo Channel, about 40 miles southwest of Ketchikan. The U.S. Lighthouse Service opened the station in 1903. It was manned until 1970. The lens was manufactured in France in 1904. Its beehive shape was invented by Augustin Fresnel (1788-1827) and uses both refraction and reflection to concentrate light into a horizontal beam. Originally it was illuminated by a kerosene vapor lamp. A clockwork mechanism, activated by weights suspended through the center of the lighthouse, made the lens rotate. The light and rotating mechanism were electrified in 1939. In 1963, the lens was replaced with a rotating beacon. Donor: United States Coast Guard, THS 2012.1.1.1 |
Material |
Glass/Brass/Steel |
Dimensions |
H-76 W-35 D-45 inches |
Dimension Details |
Approximately 193 cm x 89 cm x 114 cm |
Search Terms |
USLHS USCG United States Coast Guard Tree Point Light House Station Lighthouse |
Credit line |
Ketchikan Museums: Tongass Historical Society Collection, THS 97.1.1.1 |