Firearm Chamber Marker With Visual Unloaded-State Verification

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Solution Overview

Problem

Existing safety measures for firearms, particularly in environments like shooting ranges and hunting, are inadequate in ensuring easy visual verification of an unloaded state, leading to potential accidents due to improper handling and forgetting to unload firearms.

Innovation Solution

A visual safety marker is designed to be inserted into the firing chamber of firearms, featuring a signaling module and guides that ensure easy visual confirmation of an unloaded state, with optional illumination and secure attachment to the user's clothing, preventing accidental firing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If strict safety rules are applied for firearm storage and transportation, then safety level is improved, but ease of operation deteriorates due to complex verification procedures

Engineering Contradiction:
Improvesafety levelVSAvoidease of verification
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent uses color-coded visual markers (red for loaded, green for unloaded) to indicate the safety status of firearms. This allows immediate visual verification of the firearm's state without complex procedures, resolving the contradiction between high safety requirements and ease of verification.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The patent introduces visual markers as intermediary objects that provide information about the firearm's safety status. These markers act as mediators between the firearm state and the user's knowledge, enabling easy verification without direct inspection of the firearm's internal state.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If visual markers are added to indicate loaded/unloaded state, then ease of verification is improved, but device complexity increases

Engineering Contradiction:
Improveease of verificationVSAvoidmarker system complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent divides the visual marker system into separate, simple components: a base marker and optional illumination elements. This segmentation allows the core functionality to remain simple while adding enhancement features independently, minimizing overall system complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent employs simple, inexpensive visual markers that can be easily replaced or removed. These markers are designed as simple plastic pieces with basic optical properties, avoiding complex mechanisms and reducing overall system complexity while maintaining ease of verification.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Illumination intensity

If illumination elements are integrated into the marker, then visibility is improved, but use of energy increases

Engineering Contradiction:
ImprovevisibilityVSAvoidenergy consumption
Core Design Contradiction:
Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent implements illumination that can be activated periodically or on-demand rather than continuously. The illumination elements (LEDs or fluorescent materials) can be triggered when needed, such as in low-light conditions or during verification moments, reducing overall energy consumption while maintaining visibility when required.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The patent replaces active illumination systems with passive optical elements like fluorescent or phosphorescent materials that store and release light energy without requiring continuous power input. This substitution dramatically reduces energy consumption while maintaining visibility functions.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The marker provides a high level of safety by ensuring all users can easily verify the firearm's unloaded state, reducing the risk of accidents by visually indicating its safety status, and preventing unauthorized firing.

Implementation Method 1

The marker comprises a signaling module... providing a high level of safety by ensuring all users can easily verify the firearm's unloaded state, visually indicating its safety status

Methodology Applied
Scientific EffectReflection: Reflection

Implementation Method 2

with optional illumination

Methodology Applied
Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentEP4325160B1Visual marker for small arms
Publication Date: 2025.12.03 NOWAK PRZEMYSLAW
  • EP4325160B1 patent drawingFigure 1a~1b
  • EP4325160B1 patent drawingFigure 2~3
  • EP4325160B1 patent drawingFigure 4a~4b

AI summary

The subject of the invention is a visual safety marker for firearms comprising a rear portion and a front portion, a signalling-gripping portion, a connecting extension and at least one guide for inserting into a firing chamber, characterised in that the signalling-gripping portion comprises a first planar element and a second planar element connected to each other at the right angle, and the first planar element contains a flat connecting extension, which is connected with at least one guide in the front portion of the marker for insertion into at least one firing chamber of a layout of firearm firing chambers, wherein the signalling-gripping portion contains a signalling portion and a gripping portion, wherein the marker in the front portion contains the signalling portion of the signalling-gripping portion and at least one guide, wherein the marker in the rear portion contains the gripping portion of the signalling-gripping portion.