Rare "J.F. Donnell Patent *New York." Oil Lamp Burner with Multiple String Wicks !!! Number 2 size threads work great, and the Gallery Prongs are complete and in excellent condition. Currently missing a small flame spreader in the center tube. I would add another $100.00 in value once that is found and installed.
Including 2 Tight fitting Chimneys. One has a Student Type profile & the other has a normal Flame Shape. Both Chimneys are 10 inches High with 1 7/8 inch Straight slip-fitter bases.
Full Paper Copy of US Patent, as partially seen in the Copy of the US Patent Office Drawing, in the last image.
Measures : 4 inches high, when fully retracted, and 3 inches high when wicks are up completely.
Weight : Burner alone without chimneys is 5 Ounces of Brass.
__________________Historical Notes ; _______________________
US. Patent Number : 289,571 with Patent Date of Dec 4, 1883
Patented By : Schwintzer, Carl & Graff, Wilhelm
Assignee : J.F.Donnell & Co. of New York City)
Original German patent Register ref. : pat #10621 Nov.14,1879 & #11713 Mar.26,1880