Safety Primer Feeding Device with Elevator Mechanism
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Solution Overview
Problem
Existing reloading systems do not effectively prevent primers in a loading tray from igniting when a primer explodes during installation into a cartridge case.
Innovation Solution
A safety prime feeding device featuring a tray base with a primer tray, a bearing yoke, a priming pin, and an elevator pin, which maintains a separation distance between the primers and the priming pin to prevent ignition, including a primer barrier and an actuator body with a lever and connecting rod to manage primer insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If primers are stored in a loading tray for efficient reloading, then productivity is improved, but the risk of ignition from primer explosion increases
Solution Approach 1:
The loading tray is segmented into multiple compartments by partition walls, separating primers into different sections. This segmentation maintains the ability to store multiple primers for efficient reloading while reducing the risk that an explosion in one compartment will ignite primers in other compartments, as the partition walls create physical barriers between them.
2Ease of operation
If primers are placed close to the priming pin for easy insertion, then ease of operation is improved, but the separation distance needed for safety is reduced
Solution Approach 1:
The elevator mechanism performs preliminary action by automatically lifting the primer from the tray and positioning it in a safe location before the priming pin approaches. This preliminary positioning action allows the primer to be ready for insertion without requiring it to be placed close to the priming pin, thereby maintaining both ease of operation and safe separation distance.
Solution Approach 2:
The elevator acts as an intermediary mechanism between the primer in the tray and the priming pin. It transfers the primer from the tray to a positioned location near the priming pin without requiring direct contact or close proximity between the primer and priming pin during the transfer process, thus maintaining safety distance while enabling easy insertion.
3Device complexity
If a simple primer tray design is used, then device complexity is reduced, but safety isolation between primers and priming pin is insufficient
Solution Approach 1:
The tray structure is segmented with partition walls that divide the tray into separate compartments. This segmentation provides safety isolation between primers and the priming pin area while maintaining a relatively simple overall structure. The partition walls are straightforward vertical divisions that add minimal structural complexity but effectively create isolated zones.
Solution Approach 2:
The elevator mechanism serves as an intermediary that bridges the simple tray structure and the safety requirements. It provides the necessary isolation and controlled transfer function without requiring a complex tray structure, thereby maintaining device simplicity while achieving reliable safety isolation.
Data Source
AI summary
A safety prime feeding device includes a tray base, a tray cover, a bearing yoke, a priming pin and an elevator pin. The tray base includes a primer tray and an attachment projection that extends from the tray base. Primers are loaded into the primer tray. A primer slot is formed in a top of the attachment projection. The elevator pin pushes a primer to the primer slot above the primer tray for transfer of the primer to the priming pin. The priming pin and elevator pin are retained by the bearing yoke. A primer barrier is formed in the primer tray adjacent the elevator pin. An actuator body includes a tray retaining body, a lever and a connecting rod. The attachment projection is retained by the tray retaining body. Squeezing the lever pushes the connecting rod, which pushes the bearing yoke to push the primer into the cartridge.