Circuit Testing Device With Magnetic Ground Coupling

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Solution Overview

Problem

Existing electrical circuit testing devices face challenges in maintaining stable contact between the device and a negative or ground terminal, particularly due to the use of alligator-style clips that can slip or fall off, disrupting the testing process.

Innovation Solution

A circuit testing device with a probe having a circuit tip and a bulb end, combined with a magnet for magnetic coupling to a ground terminal, eliminating the need for clips and ensuring a stable connection between the positive and negative terminals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If alligator-style clips are used to couple with negative terminal, then the device can be attached to ground source, but the clips can slip or fall off easily

Engineering Contradiction:

Improveconnection stabilityVSAvoidattachment difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the mechanical alligator-style clip system with a magnetic coupling system. The magnet embedded in the housing creates a magnetic field that attracts to the metallic negative terminal, eliminating the need for mechanical clips that slip or fall off. This substitution of mechanical connection with magnetic attraction directly resolves the connection stability issue while maintaining ease of attachment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnet acts as an intermediary element between the housing and the negative terminal. Instead of direct mechanical contact through clips, the magnetic field serves as the mediating force that creates a stable connection. This intermediary magnetic coupling allows the device to maintain reliable contact with the terminal without the drawbacks of mechanical clips.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If spring-tensioned clips are used to maintain connection, then the device can stay attached to terminal, but the clips interrupt workflow when slipping off

Engineering Contradiction:

Improveconnection stabilityVSAvoidworkflow interruption

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

By replacing spring-tensioned mechanical clips with a magnetic coupling system, the patent eliminates the source of workflow interruptions. The magnetic connection maintains stable attachment without the slipping issue that causes time loss, allowing continuous troubleshooting without repeated re-attachment operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If alligator clips are used for connection, then the device can test continuity, but the clips are tough to attach to rounded or large terminals

Engineering Contradiction:

Improveterminal compatibilityVSAvoidattachment ease

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The magnetic coupling system replaces the mechanical alligator clip design, providing superior adaptability to different terminal shapes and sizes. The magnetic field can attract to various configurations of metallic terminals including rounded or large surfaces, eliminating the attachment difficulties inherent in mechanical clips while maintaining continuity testing capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 device allows for reliable and continuous testing by maintaining a stable electrical connection between terminals, reducing interruptions and improving workflow efficiency.

Implementation Method 1

A magnet is coupled to the magnet end, the magnet is configured for magnetic coupling to any ground terminal, such as the metallic surface of a car battery

Methodology Applied

Scientific EffectMagnetic coupling: Magnetism

Implementation Method 2

The probe, the spring, the wire, and the magnet complete the electrical circuit between the positive terminal and the negative terminal thereby allowing an electrical current to flow between the positive terminal and the negative terminal to energize the lightbulb, causing the lightbulb to emit light

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS20250138057A1Circuit testing device

Publication Date: 2025.05.01 MARTINEZ RICHARD

AI summary

A circuit testing device for maintaining contact between the device and a ground source includes a housing having an interior space. A probe is mounted to the housing. The probe includes a circuit tip and a bulb end. The probe extends through the housing so the circuit tip is spaced apart from the housing and the bulb end is within the interior space. A lightbulb positioned within the interior space physically contacts the bulb end and is visible through the housing. A spring is positioned in the interior space and is electrically coupled to the lightbulb. The device includes a wire having a housing end and a magnet end. The housing end is attached to the spring. A magnet coupled to the magnet end can attach to a metallic surface. The probe, spring, wire, and magnet complete an electrical circuit between the positive terminal and ground source, powering the lightbulb.