Travailleur - Flying Machine, Swiss Patent 34196 of 1905
A single sheet of patent drawings filed by Charles Travailleur for Swiss patent 34196 of 1905, submitted to the Bern patent office for examiners and engineers assessing a rotary-winged flying machine. Fine pen line drawings show side and end elevations of a tubular frame with umbrella-like rotors, plus a bladed fan disc and a propeller, each numbered figure set on aged paper carrying office stamps and handwritten file numbers.
