This is the patent drawing. Neither his tailpiece nor the banjo he patented have been seen. Elite patented by Charles S. Delano in 1899. Found on low end instruments and some models of Vegas and Gibsons in the 1940s and later. It was advertised by Sherman Clay Music, but the actual maker is unknown.
Drawing shows how it works.
Made from ivoroid, a then-recently invented material, developed to provide a substitute for elephant ivory. Herschel Fenton, NY, NY Patent June 23, 1891. Gerke , Providence, RI. patented Jan. 31,1888. Besides regular banjos, often found on Pollman Mandoline Banjos and Guitars. Grover Patent, Early version, pre-dates the Presto models, it has a cover that slides off, and 8 hooks allowing the tp to be used on banjos, banjo guitars, or banjo mandolins.