Casimir Lefaucheux’s Third Improvement and Addition Patent for Breech-Loading Firearm Mechanism, No. 5138, 1834

Description

The document reflects Casimir Lefaucheux's continued efforts to improve breech-loading firearm technology, highlighting his second patent of addition and improvement, filed on July 30, 1834, and granted on November 22, 1834. This particular application, identified with the reference number 1BA4039(3), specifically addresses a critical enhancement in ammunition design.

Lefaucheux's addition proposes a significant change in cartridge fabrication, introducing a metallic capsule at the end of the cartridge. This innovation aims to prevent the loss of gases upon ignition, thereby increasing the efficiency and reliability of the firearm. The description indicates that this capsule could be manufactured using various metals, such as copper, tinplate, or lead, and produced through stamping, crimping, or drawing processes.

The application was made in accordance with the French patent laws established in January and May of 1791, and was subjected to the rigorous administrative processes of the Ministry of Commerce and Public Works. The ministry's provisional acceptance of this patent application demonstrates recognition of the potential improvement Lefaucheux's invention offered to the firearms industry.

Lefaucheux's patent application, along with the accompanying descriptive memorandum and drawings, were to be kept on file and delivered to the Prefecture of the Seine, ensuring that all legal formalities were properly documented. This patent application is another testament to Lefaucheux's role as a pivotal figure in the development of early firearms technology, particularly in the areas of efficiency and safety in ammunition design.