Weight-Triggered Bird Feeder Cage for Selective Seed Access
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Solution Overview
Problem
Current bird feeders face issues with larger birds, such as grackles, accessing and consuming seeds intended for smaller songbirds, leading to inefficiencies and potential displacement of desired avian species.
Innovation Solution
A bird feeder design featuring a movable cage and shroud system that allows selective access to seeds, using a mesh housing with adjustable openings to accommodate smaller birds while preventing larger birds from accessing the seed tray, and a spring mechanism to deny access when excessive weight is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional open bird feeder is used, then birds can easily access seeds, but larger birds like grackles can also access and consume seeds intended for smaller songbirds
Solution Approach 1:
The cage is designed to be movable between an open position allowing access and a closed position denying access. When a bird lands on the perch, the cage can close to prevent larger birds from reaching the seeds while remaining open for smaller songbirds. This dynamic positioning resolves the contradiction between preventing harmful access and maintaining ease of legitimate access.
Solution Approach 2:
The cage acts as an intermediary barrier between the birds and the seeds. It selectively mediates access based on bird size and behavior, allowing smaller songbirds to pass through while blocking larger grackles. This intermediary structure resolves the contradiction by introducing a selective filtering mechanism.
2Object-affected harmful factors
If a cage is added to prevent larger birds from accessing seeds, then seed protection is improved, but the device complexity increases
Solution Approach 1:
The cage and shroud are combined into an integrated assembly that moves together as a single unit. This merging reduces the number of separate components and simplifies the overall mechanism while still providing effective seed protection. The combined structure eliminates the need for separate actuation mechanisms for each component.
Solution Approach 2:
The cage serves multiple functions: it acts as a physical barrier against larger birds, provides structural support for the perch, and works in conjunction with the shroud to control access. This multi-functionality reduces the need for additional components, thereby reducing overall device complexity while maintaining protection effectiveness.
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
Effectively prevents larger birds from accessing seeds while allowing smaller birds to feed, maintaining the feeder's intended purpose and attracting the desired avian species.
Implementation Method 1
a spring mechanism to deny access when excessive weight is applied
Data Source
AI summary
The present disclosure provides a bird feeder having a seed container, seed tray, shroud, cover as well as a cage surrounding the seed tray and lower end of the shroud. The cage has a wide lower end to allow small birds, such as songbirds, through the cage to access the seeds. However, the cage is secured to the shroud such that movement of the cage, due to weight of larger birds, will correspondingly actuate the shroud and move both the cage and shroud downwardly and prevent access to the seeds in the seed tray.