Skip to content

The Talking Machine Patent Archive

Patents you could hear

Browse Dates Inventors Types About

Ratchet-wheel drive

Patent drawing of an accordion-like automatic musical instrument showing a folding bellows chamber with a reed-board, a series of gears and ratchet wheels on a shaft, and below it a separate diagram of a long perforated valve-sheet strip marked with note letters and numbered apertures.

IMPROVEMENT IN AUTOMATIC MUSICAL INSTRUMENTSHenry B. Horton · October 30, 1877

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.

About · Terms · Privacy · Corrections welcome — this archive gets better when collectors write in.