Fusible Mechanical Linkage for Fire Suppression

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The installation and adjustment of fusible mechanical linkages in fire suppression systems are complicated and time-consuming due to the complexity of the systems.

Innovation Solution

A fusible mechanical linkage with a tensioner and spool arrangement, where a fusible alloy fixes the spool to the tensioner below a predetermined temperature, allowing the spool to rotate relative to the tensioner above this temperature, enabling easy loading and unloading of tension in an actuation cable, and featuring catches and ramps for secure cable retention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional fusible mechanical linkages and cable take-up devices are used, then fire suppression system activation is reliable, but installation and adjustment become complicated and time-consuming

Engineering Contradiction:

Improvefire suppression system activation reliabilityVSAvoidinstallation and adjustment complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the fusible link and cable take-up device into a single integrated fusible mechanical linkage assembly. The spool is mounted on the tensioner body, and the fusible alloy connects both components simultaneously, eliminating the need for separate linkage and take-up devices. This merging reduces installation steps and overall system complexity while maintaining the reliable activation function.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fusible mechanical linkage assembly serves multiple functions: it acts as both the fusible link that responds to heat and the cable take-up device that manages cable tension. The single assembly performs what previously required multiple separate components, simplifying installation and adjustment procedures while ensuring reliable fire suppression activation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If separate fusible link and cable take-up devices are used, then tension control is effective, but installation and servicing become time-consuming

Engineering Contradiction:

Improvetension control effectivenessVSAvoidinstallation and servicing time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

By integrating the cable take-up spool directly into the tensioner body and connecting both through fusible alloy, the patent creates a single assembly that maintains effective tension control while reducing installation and servicing time. The unified design eliminates the need to install and adjust separate components, allowing technicians to complete tasks more efficiently.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If complex fusible mechanical linkages are used, then activation reliability is ensured, but the system requires multiple components that complicate installation

Engineering Contradiction:

Improveactivation reliabilityVSAvoidinstallation ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the fusible link and cable take-up device into one integrated assembly with a unified fusible alloy connection. This reduces the number of separate components that need to be installed and assembled, making installation easier while preserving activation reliability through the maintained fusible link functionality.

Inventive Principle:

Principle #5Merging (Combining)

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 simplifies the installation and adjustment of fire suppression system actuation cables, allowing for single-handed operation and reducing the need for separate linkage and take-up devices, thereby streamlining the process while maintaining effective tension management.

Implementation Method 1

A fusible alloy is arranged between the spool and the tensioner, the fusible alloy fixing the spool to the tensioner below a predetermined temperature, the fusible alloy allowing tension carried by an actuation cable received in the cable seat to rotate the spool relative to the tensioner above the predetermined temperature.

Methodology Applied

Scientific EffectFusible alloy melting: Melting

Data Source

PatentUS11547889B2Fusible mechanical linkages for fire suppression systems

Publication Date: 2023.01.10 KIDDE FENWAL LLC

AI summary

A fusible mechanical linkage includes a tensioner having an aperture and a spool with guides arranged on an end of the spool opposite the aperture. The guides define a cable seat between one another. A fusible alloy is arranged between the spool and the tensioner, the fusible alloy fixing the spool to the tensioner below a predetermined temperature, the fusible alloy allowing tension carried by an actuation cable received in the cable seat to rotate the spool relative to the tensioner above the predetermined temperature. Fire suppression systems and methods adjusting actuation cables in fire suppression systems are described.