The Talking Machine Patent Archive

Patents you could hear

Finger-lever tracker

Mechanical drawing of a Victorian musical instrument mechanism showing a plan view of an air chest with rows of pivoted finger-levers, valves, and rails (Fig. 1), and below it a side sectional view (Fig. 2) showing a perforated paper strip looping around two drum rollers connected by a belt-driven pulley system, with a diaphragm chamber and key linkage.IMPROVEMENT IN MUSICAL INSTRUMENTS.George W. Van Dusen · December 10, 1867