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Pitman-rod drive

Patent drawing of a wooden orguinette-style mechanical organ mounted on a stand, showing two large paper-strip rollers at either end, a central reed box labeled with mechanism letters, a hand crank, and internal cross-section views of the bellows and shaft linkages.

IMPROVEMENT IN MECHANICAL MUSICAL INSTRUMENTS.George B. Kelly and Mason J. Matthews · July 22, 1879

United States patent drawings and specifications are works of the U.S. government and are in the public domain — they were never copyrighted. Download them, print them, frame them. Our commentary and descriptions are © 2026 The Talking Machine Patent Archive.

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