Bullet Marking Apparatus Using Spring Compression
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Solution Overview
Problem
Current methods for analyzing gun barrel marks on bullets are either dangerous or inaccurate, as they require firing the firearm or do not account for the compression force imparted by the explosion, leading to variations in marks due to acceleration and speed.
Innovation Solution
A cold firing apparatus and compressing device that simulate the firing process by compressing a bullet within a gun barrel using a biasing member and sliding members, allowing the bullet to be marked without firing the firearm, thereby replicating the marks imparted by the barrel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the firearm is fired to obtain barrel marks on a bullet, then the marks are authentic and comparable, but the process becomes dangerous
Solution Approach 1:
The patent creates a cold firing apparatus that replicates the barrel marking process without actual firing. The apparatus uses a compression mechanism to push a bullet through the barrel, copying the essential function of firing while eliminating the dangerous explosive combustion. This allows forensic examination of barrel marks without the risks associated with live firing.
2Object-affected harmful factors
If the firearm is not fired but manually pushed, then the process is safe, but the marks vary due to lack of compression force and acceleration
Solution Approach 1:
The cold firing apparatus controls the compression force parameter by using a spring-loaded mechanism that applies a standardized force to push the bullet through the barrel. This controlled parameter ensures consistent marks are produced, replicating the acceleration and compression effects of actual firing without the variability introduced by manual pushing.
3Measurement precision
If compression force is applied to simulate firing, then mark accuracy improves, but the device complexity increases
Solution Approach 1:
The cold firing apparatus uses a spring-loaded compression mechanism that automatically applies the necessary force to push the bullet through the barrel. The spring stores potential energy and releases it to create the compression effect, eliminating the need for external power sources or complex control systems. This self-service mechanism simplifies the overall device complexity while maintaining mark accuracy.
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
This method allows for accurate simulation of gun barrel marks without the risks associated with firing, ensuring that the marks obtained are comparable to those from actual firing, thus aiding forensic analysis.
Implementation Method 1
a biasing member in engagement with the first and second members, the biasing member having a compressing configuration in which the first and second members are biased toward one another
Implementation Method 2
the first and second members and the bullet received therebetween movable relative to the barrel thereby imparting marks on the bullet by the barrel
Data Source
AI summary
A bullet compressing device for creating marks imparted by a barrel of a gun on a bullet, has: a first member; a second member spaced from the first member by a gap, a dimension of the gap selected to correspond to at least a length of the bullet, the first and second members slidingly receivable within the barrel of the gun; a biasing member in engagement with the first and second members, the biasing member having a compressed configuration in which the first and second members are biased toward one another thereby decreasing the dimension of the gap, one of the first and second members engageable by an actuator, the first and second members and the bullet received therebetween movable relative to the barrel thereby imparting marks on the bullet by the barrel upon actuation of the actuator.