4TH ORDER USLHS FUNCK HEAP BRASS OIL LAMP скачать в хорошем качестве

4TH ORDER USLHS FUNCK HEAP BRASS OIL LAMP

The Funck-Heap lamp (often spelled Funk-Heap) was a crucial, standardized oil-burning lamp introduced in 1892 for 4th-order Fresnel lenses in the United States Lighthouse Establishment (USLHE). Designed for smaller lighthouses and range lights, it was considered more efficient than previous models. Key Details of the Funck-Heap Lamp: Origin: Developed by Joseph Funck, the foreman of the 3rd District Lamp Shop in Tompkinsville, NY (Staten Island). Design & Function: It was an Argand-style lamp with a 1-1/8 inch diameter single wick. A key feature was a flame-spreading button in the center that became red-hot, maintaining a constant, efficient flame size and shape. Operation: The lamp utilized a screw thread on the wick-carrying tube to adjust the wick. It typically operated with an 8-day oil reserve. Usage: It became the standard lamp for 4th-order lenses and was widely used in post lanterns, especially around the Chesapeake Bay and North Carolina. Modern Day: These lamps are now highly sought-after antiques, with rare examples occasionally appearing for sale or in museums. Related Historical Items: Staten Island Lamp Shop: The 3rd District Lamp Shop on Staten Island is frequently cited as the source for these, as well as Funck's Improved Fourth-Order Lamp (1888) and various oil-filling cans. 8-Day Lamp: Funck also developed an 8-day lamp in 1885. Heap Air-Pressure Lamp: Developed in 1899 by Major David P. Heap.