Fuse Assembly Venting Structure for Noise and Debris Containment
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Solution Overview
Problem
Legacy fuse assemblies face issues with noise and debris dispersal due to cap blow-off during overcurrent events, leading to reduced ratings and potential circuitry problems.
Innovation Solution
The novel fuse assembly design features a reversed capsule and socket configuration, with integrated terminals and wedged surfaces within the socket and capsule to mitigate noise and debris, along with an exhaust port for controlled outgassing, ensuring the capsule remains intact and reducing noise and debris dispersal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fuse element breaks during overcurrent event, then the circuit is protected by opening the circuit, but the cap blows off causing noise and debris dispersal
Solution Approach 1:
The patent converts the harmful arc energy and debris from fuse element breakage into a beneficial containment system. The capsule and socket structure captures the arc and debris, transforming the destructive blow-off event into a controlled internal phenomenon that protects surrounding circuitry while maintaining the circuit protection function.
Solution Approach 2:
The capsule acts as an intermediary between the fuse element and the external environment. It mediates the harmful effects of arc energy and debris by containing them internally, while still allowing the fuse to perform its circuit protection function. The socket provides an additional intermediary layer that further contains and controls the arc and debris.
2Reliability
If the cap blows off during overcurrent event, then the fuse element breaks to protect the circuit, but the housing integrity is compromised leading to lower ratings
Solution Approach 1:
The fuse housing is segmented into distinct functional components: the capsule that contains the fuse element, and the socket that provides structural support and terminal connections. This segmentation allows the capsule to contain the breakage event while the socket maintains overall housing integrity and structural stability.
Solution Approach 2:
The capsule and socket structure provides beforehand cushioning by creating a protective enclosure around the fuse element before any overcurrent event occurs. This pre-established containment structure cushions and absorbs the energy from arc and debris generation, preventing housing integrity compromise.
3Reliability
If the cap blows off during overcurrent event, then the fuse element breaks to protect the circuit, but the noise level increases significantly
Solution Approach 1:
The patent converts the harmful noise-generating blow-off event into a beneficial silent containment process. The capsule and socket structure transforms the explosive cap blow-off into a controlled internal arc event that occurs silently within the enclosed chamber, eliminating the harmful noise while preserving the circuit protection function.
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 design effectively reduces noise and debris dispersal, maintaining high fuse ratings by ensuring the capsule stays intact and providing a controlled pathway for outgassing, thus preventing conductive material from remaining in the chamber and minimizing electrical interference.
Implementation Method 1
a fuse element, such as a metal wire or strip, that links two metal contact terminals together, and which melts/breaks if too much current flow
Implementation Method 2
When the fuse breaks, an arc energy is created between its terminals, causing the metal of the fuse element, as well as other materials, to melt and deposit within the fuse housing
Data Source
AI summary
A fuse assembly includes a fuse element, a first terminal, a second terminal, a socket, and a capsule. The fuse element is disposed between first and second end bells. The first terminal includes a first bell portion, a first socket portion, and a first capsule portion, the first bell portion being connected to the first end bell. The second terminal includes a second bell portion, a second socket portion, and a second capsule portion, the second bell portion being connected to the second end bell. The first socket portion and the second socket portion are integrated through the socket. The first capsule portion and the second capsule portion are integrated through the capsule. The socket is seated atop the capsule to create an interior chamber inside which the fuse element is disposed.