Determination of round count by hall switch encoding

US11971238B2 · kind B2 · utility

Assignee

• Magpul Industries Corp. · US

Inventors

• Erin Czarnecki · Broomfield, US
• Jeffrey Holt · Austin, US
• Michael Leighton · Broomfield, US
• Donald McKelvey · Erie, US
• Steven Dunbar · Lafayette, US
• Timothy Eric Roberts · Broomfield, US
• Nicholas Kielsmeier · Denver, US
• Eric Chow · Tempe, US
• Kyle Kellner · Austin, US
• Joe Deppong · Austin, US

Key dates

• Filing date: Jan 25, 2021
• Grant date: Apr 30, 2024
• Expiry date: Jun 11, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B15/02
• WIPO field: Control
• WIPO sector: Instruments

Abstract

This disclosure describes systems, methods, and apparatus for detecting and displaying a number of rounds in a firearm magazine comprising a maximum number of N rounds. The magazine may comprise a follower, magnets on the follower, and <N magnetic switches arranged along a path of the magnets when the follower moves along a length of the magazine, the switches configured to activate based on a magnetic field exceeding a threshold, and a first antenna arranged on an inside of the magazine and parallel to a firing direction of the firearm, and configured to wirelessly transmit a round count indication to a second antenna on the firearm, the round count indication based on the round count data, the second antenna affixed to an inside of a magazine well of the firearm and mostly overlapping with the first antenna.