Mischmetal Flint Rod Fire Starter with Sealed Storage

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Solution Overview

Problem

Conventional fire starters using flint-and-steel rods are difficult to use in windy conditions, require additional magnesium for ignition, and are susceptible to corrosion and deterioration in environmental factors, especially in wet environments, making them impractical for survival situations.

Innovation Solution

A compact, two-part fire starter with a mischmetal flint rod composition (50% cerium, 26% lanthanum, 10% magnesium, 3% praseodymium, 1% neodymium, and 10% iron) that screws together for storage, sealed from the environment, and features a steel strike plate for generating sufficient sparks to ignite tinder without additional magnesium, while being resistant to corrosion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional flint-and-steel rods are used, then the device can generate sparks to ignite tinder, but the device is susceptible to corrosion and deterioration in wet environments

Engineering Contradiction:

Improvefire-starting capabilityVSAvoidcorrosion resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent uses a composite flint rod material consisting of mischmetal (rare earth elements) combined with magnesium and iron. This composite composition provides both the spark-generating capability needed for fire starting and improved corrosion resistance compared to conventional flint rods. The specific combination of materials creates a rod that resists deterioration in wet environments while maintaining effective spark generation.

Inventive Principle:

Principle #40Composite materials

2Reliability

If additional magnesium is carried separately, then the fire starter can provide sufficient magnesium flakes for ignition, but the device complexity and weight increase

Engineering Contradiction:

Improveignition capabilityVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the magnesium component directly into the flint rod structure itself, eliminating the need for separate magnesium cartridges or blocks. The flint rod is constructed with magnesium integrated throughout its composition, allowing the user to scratch magnesium flakes directly from the rod during fire starting. This integration reduces the number of separate components while maintaining reliable ignition capability.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If the flint rod is exposed to the environment for easy access, then the device is simple to use, but the flint rod deteriorates rapidly in wet conditions

Engineering Contradiction:

ImproveaccessibilityVSAvoidflint rod durability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent employs a protective coating or sheath that encapsulates the flint rod, protecting it from moisture and environmental deterioration while still allowing the user to access and scratch the magnesium when needed. This protective layer acts as a barrier that prevents direct contact between water and the flint rod, maintaining its compositional stability during storage and transport.

Inventive Principle:

Principle #30Flexible shells and thin films

4Power

If conventional flint rods are used, then the device can produce sparks, but the sparks are not hot enough to ignite tinder in windy conditions

Engineering Contradiction:

Improvespark temperatureVSAvoidignition reliability in wind

Core Design Contradiction:

PowerVSEase of operation

Solution Approach 1:

The patent modifies the chemical composition parameters of the flint rod by incorporating specific ratios of mischmetal, magnesium, and iron. This compositional change results in sparks with higher temperature and greater energy content, enabling reliable ignition of tinder even in challenging windy conditions. The parameter optimization ensures that the sparks generated are sufficiently hot and persistent to overcome wind-induced cooling and dispersal.

Inventive Principle:

Principle #35Parameter changes

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 mischmetal flint rod composition provides a reliable, compact, and safe fire-starting tool that can ignite tinder effectively in various outdoor conditions, including wet environments, with a longer-lasting strike plate and improved durability.

Implementation Method 1

a steel strike plate contacts a flint rod member to generate sparks

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

The sparks can be used to ignite a finely divided flammable material

Methodology Applied

Scientific EffectCombustion: Combustion

Implementation Method 3

the mischmetal flint rod composition provides... resistance to corrosion

Methodology Applied

Scientific EffectCorrosion resistance: Crevice Corrosion

Data Source

PatentUS8186995B2Survival tool fire starter with mischmetal flint rod

Publication Date: 2012.05.29 FOUNTAINHEAD GROUP INC

AI summary

A fire-starter device for survival or emergency use has a handle portion and case portion that twist together, to sheath a mischmetal flint rod inside the case, and a seal ring protects the flint rod from environmental moisture. The case has a steel strike plate and a guide channel. The mischmetal flint rod favorably has a composition of cerium—50%, lanthanum—26%, magnesium—10%, praseodymium—3%, neodymium—1%, and iron—10%.