Welding Helmet Lighting Control via Magnetic Position Switches

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Solution Overview

Problem

Welding workspaces often lack sufficient illumination, leading to errors due to the darkened lenses of welding helmets, which are designed to protect against extreme light but hinder visibility when the shield is raised or lowered.

Innovation Solution

A control system that automatically switches power between a light source on the welding shield and a light source on the headband, using magnetic positional switches to activate the appropriate light source based on the shield's position, with manual override and adjustable focus options.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a darkened lens is used to protect against extreme light during welding, then eye protection is improved, but workspace visibility deteriorates

Engineering Contradiction:

Improveeye protection from extreme lightVSAvoidworkspace visibility

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The lighting system is segmented into two separate light sources: one mounted on the welding shield and another on the headband. This segmentation allows each light source to serve a specific function - the shield-mounted light provides focused illumination when the shield is down, while the headband light provides general workspace illumination when the shield is up, thereby resolving the contradiction between eye protection and workspace visibility.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If the welding shield is raised to see the workspace, then visibility is improved, but protection from welding arc light is lost

Engineering Contradiction:

Improveworkspace visibilityVSAvoidprotection from welding arc light

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The headband-mounted light source acts as an intermediary that provides continuous workspace illumination regardless of shield position. When the shield is raised, this intermediary light source ensures visibility without requiring the shield to be fully opened, thereby maintaining both visibility and protection simultaneously.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If a single light source is used, then device complexity is reduced, but lighting coverage and adaptability deteriorate

Engineering Contradiction:

Improvelighting system structureVSAvoidlighting coverage for different shield positions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The dual light source system provides multi-functionality by accommodating two different operational modes: welding mode (shield down, focused light) and inspection mode (shield up, general light). This universality allows a single lighting system to effectively serve multiple purposes across different working conditions, resolving the contradiction between simplicity and adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Ease of operation

If manual lighting control is used, then ease of operation is improved, but productivity deteriorates due to frequent manual adjustments

Engineering Contradiction:

Improvelighting control simplicityVSAvoidworkflow efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The lighting system incorporates automatic control that senses shield position and autonomously activates the appropriate light source without requiring manual intervention. This self-service capability eliminates the need for workers to manually adjust lighting during welding operations, thereby maintaining ease of operation while significantly improving productivity by preventing workflow interruptions.

Inventive Principle:

Principle #25Self-service

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

Provides focused illumination of the workspace, enhancing visibility and reducing errors by automatically turning on the appropriate light source when the shield is raised or lowered, while allowing manual control for specific lighting needs.

Implementation Method 1

using magnetic positional switches to activate the appropriate light source based on the shield's position

Methodology Applied

Scientific EffectMagnetic field interaction: Magnetic Field

Data Source

PatentUS9109786B2Method for controlling a lighting system integrated with a utility helmet

Publication Date: 2015.08.18 ROBINSON LEVI JACOB

AI summary

Using a control system for automatically switching power between a first light source attached to a welding shield pivotally mounted to an adjustable headband, and a second light source attached to the headband, a method for alternating power to the light sources includes steps (a) raising the shield to the uppermost rotational position resulting in power on to the second light source, the second light source remaining on at the raised position, and (b) lowering the welding shield to the maximum allowable distance resulting in power off to the second light source immediately followed by power on to the first light source, the first light source remaining on at the lowered position.