Aug 19, 2025

US12392592 - Electrical priming of a firearm primer

The present disclosure relates to a primer for a personal firearm. The primer includes a primer cup including a cylindrical side wall closed at one outer end by a bottom; a pyrotechnic charge placed in the primer cup; an electrical component suitable for producing the thermal energy needed for priming the pyrotechnic charge, the charge being in contact with the electrical component; a printed circuit board, said printed circuit board having an internal face comprising the electrical component in contact with the pyrotechnic charge, characterized in that said printed circuit board forms at least in part the outer bottom of the primer cup.

Assignee: FN HERSTAL S.A.
Inventors: Guillaume Pont, Benjamin Istaz, Hugues Libotte, Patrick Heins, Bernard Baps, Romain Santus
Filing date: 2022-01-27

firearmprimerelectrical

The patent describes an innovative primer for personal firearms that integrates an electrical component and a printed circuit board to ignite a pyrotechnic charge through thermal energy. This design allows the printed circuit board to serve as part of the primer cup’s structure, enhancing functionality and potentially improving reliability in firing mechanisms.

Claim 1

A primer for a personal firearm, the primer comprising: a primer cup including a cylindrical side wall closed at one outer end by a bottom; a pyrotechnic charge placed in the primer cup; an electrical component configured to produce thermal energy to ignite the pyrotechnic charge, the charge being in contact with the electrical component; and a printed circuit board including an inner face comprising the electrical component in contact with the pyrotechnic charge and a non-conductive external face, wherein a conductive plate is disposed on the non-conductive external face; and wherein the non-conductive external face of the printed circuit board forms at least in part the bottom of the primer cup, such that at least a portion of the non-conductive external face and the conductive plate are exposed. a primer cup including a cylindrical side wall closed at one outer end by a bottom; a pyrotechnic charge placed in the primer cup; an electrical component configured to produce thermal energy to ignite the pyrotechnic charge, the charge being in contact with the electrical component; and a printed circuit board including an inner face comprising the electrical component in contact with the pyrotechnic charge and a non-conductive external face, wherein a conductive plate is disposed on the non-conductive external face; and wherein the non-conductive external face of the printed circuit board forms at least in part the bottom of the primer cup, such that at least a portion of the non-conductive external face and the conductive plate are exposed.

Google Patents

https://patents.google.com/patent/US12392592

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12392592