Automatic Case Fed Priming Tool Centering Mechanism
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Solution Overview
Problem
There is a need for an automatic case fed priming tool that does not include a shell holder, capable of locating, conveying, and sequencing a primer escapement mechanism with a positive repeatable primer seating depth, while centering cases of varying sizes.
Innovation Solution
The automatic case fed priming tool features a primer insertion device with a moving primer platform, a primer die body, and a primer feed trough, which includes a breach lock, a primer pin, a primer compression spring, a pin housing, a case push pin, and a flexible primer feed system that centers cases using a U-shaped guide finger mechanism, allowing for a range of case sizes and ensuring repeatable primer seating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shell holder is used in traditional priming tools, then the primer can be held and inserted, but the device becomes more complex and cannot accommodate a wide range of case sizes
Solution Approach 1:
The invention removes the traditional shell holder component from the priming tool. By extracting this element, the device achieves versatility to handle various case sizes without the complexity of adjustable shell holders, while still effectively holding and inserting primers through alternative mechanical means
Solution Approach 2:
The priming tool is designed with universal functionality to accommodate different case sizes through a standardized interface. The tool body and primer insertion mechanism are configured to work with various cartridge types without requiring size-specific adjustments or additional components
2Manufacturing precision
If a fixed primer seating mechanism is used, then the primer insertion is simple, but the primer seating depth lacks precision and repeatability
Solution Approach 1:
The primer insertion mechanism incorporates a movable platform that can be positioned at precise depths. This dynamic positioning system allows the primer to be seated at a consistent, repeatable depth while maintaining a relatively simple overall structure through controlled motion rather than complex adjustment mechanisms
3Adaptability or versatility
If manual case centering is used, then the device is simpler, but cases of varying sizes cannot be properly centered and aligned
Solution Approach 1:
The alignment mechanism features locally adapted components including adjustable guide fingers and positioning elements that can be configured for different case diameters. These localized adjustment features enable proper centering of various case sizes without requiring complete redesign of the entire alignment 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 tool effectively centers and primes cases of various sizes with a repeatable seating depth, ensuring efficient primer insertion and ejection, and is integrated with an automatic process press for enhanced functionality.
Implementation Method 1
a primer compression spring
Implementation Method 2
an ejection compression spring
Data Source
AI summary
An automatic case fed priming tool preferably includes a primer insertion device, a primer die body and a primer feed trough. The automatic case fed priming tool is preferably retained in an automatic process press. The automatic process press includes a upper die carrier and a lower die carrier. The primer insertion device preferably includes a breach lock, a moving primer platform, a primer pin and a primer compression spring. The primer die body preferably includes a pin housing, a case push pin, an ejector compression spring, a case finger guide and a case ejector. The primer feed trough preferably includes a first trough half and a second trough half. The primer insertion device is retained in the lower die carrier. The primer die body is retained in the upper die carrier. An exit end of the primer feed trough is attached to the lower die carrier.