Cylindrical Ammunition Drum with Hand Crank Spindle
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Solution Overview
Problem
Modern ammunition drums and containers are prone to misalignment and tangling of rounds and links during feeding into automatic weapons, leading to inefficiencies and safety risks, such as double feeds and misalignment issues.
Innovation Solution
A cylindrical machine gun drum with a hand-cranked rotary spindle design that ensures smooth transition and proper tension of the ammunition belt, preventing misalignment and tangling, and allowing for efficient reloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rectangular ammunition drum with zig-zag belted loading is used, then the drum structure is simple and easy to manufacture, but the rounds and links become misaligned or tangled during feeding
Solution Approach 1:
The patent transitions from a rectangular drum with zig-zag loading to a cylindrical drum with spiral winding. The curved cylindrical surface and spiral arrangement of ammunition links eliminate the misalignment and tangling issues inherent in rectangular designs, while maintaining manufacturing feasibility through standard cylindrical forming processes.
2Ease of operation
If the operator pulls the belt from the ammunition container to drape it across the forearm, then the feed into the weapon system is improved, but the linkage becomes misaligned with the ammunition and the operator is distracted from spotting targets
Solution Approach 1:
The cylindrical drum with spiral winding allows the ammunition belt to feed automatically into the weapon system without requiring the operator to manually manipulate it. The spiral configuration self-guides the belt into proper alignment as it unwinds, eliminating the need for the operator to pull and drape the belt, thus maintaining focus on target acquisition.
3Ease of operation
If the belt is broken to a smaller size and dangled from the gun's feed tray system, then the belt guidance is improved, but valuable space is wasted and the drum is less than full
Solution Approach 1:
The spiral winding configuration within the cylindrical drum provides continuous belt guidance from the full ammunition supply to the feed tray. The curved spiral path maintains proper belt alignment throughout the entire length of the ammunition belt, eliminating the need to break the belt into smaller sections and maximizing the use of drum capacity.
4Manufacturing precision
If a manual hand crank is added to the cylindrical drum, then the alignment and tension of the ammunition belt is improved, but the device complexity increases
Solution Approach 1:
The spiral winding on the cylindrical drum provides inherent belt alignment through its geometric configuration. The hand crank simply rotates the drum along its cylindrical axis, and the spiral geometry automatically maintains proper belt tension and alignment without requiring complex mechanical guides or adjustment mechanisms.
Data Source
AI summary
A cylindrical machine gun ammunition carrier drum device with hand crank and spindle, which allows operator to regulate belt-fed ammunition at a proper cyclic rate of fire and reload linked ammunition in an efficient, accelerated manner. This retract and release belt-fed ammunition method would provide proper tension and uniformity to the linked rounds, preventing the weapon from malfunctioning and improve cyclic dispersion of ammunition. This method applies to all calibers of belt-fed personal and crew-served automatic weapons. The external hand crank and internal spindle would work in unison to recover the belt if it is yanked from the cylindrical drum container prematurely. A flexible warning device ribbon connected by ammunition links would ensure all rounds are expended from within the drum when abridged from spindle to belt. Additionally, this internal warning device can be linked between belts at operator's preference.