Samuel Colt's Early Revolving Firearm Mechanism

An 1839 patent by Samuel Colt describing early improvements to the mechanical design of revolving firearms.

What it covers

This patent details mechanical refinements to the revolving firearm, specifically focusing on the synchronization between the rotation of the cylinder and the alignment of the barrel. It describes the internal components required to ensure the chamber locks securely in place before the hammer strikes the percussion cap. By automating the indexing of the cylinder, it allowed a user to fire multiple shots in rapid succession without manually realigning the mechanism.

What it doesn't cover

• —Does not cover the fundamental concept of a revolving cylinder, which existed in earlier designs.
• —Does not cover modern semi-automatic or fully automatic firearm actions.
• —Does not cover the use of metallic cartridges, as this patent predates their widespread adoption.

The clever bit

The innovation lies in the reliable mechanical indexing of the cylinder, which solved the critical problem of chamber misalignment that plagued earlier, less reliable revolving designs.

Why it matters

This patent represents a foundational step in the evolution of repeating firearms. It helped establish Samuel Colt's dominance in the 19th-century weapons industry and set the standard for the reliable revolver design that became an icon of American history.

Real-world examples

• 1.Colt Paterson revolver
• 2.Early 19th-century percussion cap revolvers