Glazing Bar Spring-Loaded Pin Attachment
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Solution Overview
Problem
Existing single-glazed steel windows are inefficient in reducing heat loss due to their single-glazed design and conductive steel frames, and attempts to achieve a multi-paned appearance with double-glazed windows using adhesive bars pose risks of adhesive failure.
Innovation Solution
A glazing bar assembly featuring a glazing bead with apertures and a glazing bar with spring-loaded pins that securely engage with the apertures, providing a stable and secure attachment to the glazing unit without relying on adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If adhesive bars are used to achieve multi-paned appearance with double-glazed windows, then the aesthetic appearance is improved, but the reliability deteriorates due to adhesive failure risk
Solution Approach 1:
The patent replaces the adhesive bonding system with a mechanical fastening system using spring-loaded pins that engage with apertures in the glazing bead. This mechanical system provides reliable attachment while maintaining the aesthetic appearance of the glazing bar, directly resolving the contradiction between appearance and reliability.
2Shape
If thin bars are mounted between glass sheets to create multi-paned appearance, then the aesthetic appearance is improved, but the visual authenticity deteriorates compared to projecting glazing bars
Solution Approach 1:
The patent nests the glazing bar within the glazing bead structure, where the bar is received in a cavity of the bead and secured by spring-loaded pins. This nesting arrangement allows the glazing bar to project slightly to maintain visual authenticity while being securely contained within the bead structure.
3Illumination intensity
If steel frames are used in single-glazed windows, then the light transmission is improved, but the heat loss increases due to steel's high thermal conductivity
Solution Approach 1:
The patent employs a composite construction where the steel glazing bar is isolated from the glass panes by the glazing bead structure, creating a thermal break. The bead acts as an insulating barrier that prevents direct thermal conduction through the steel, thereby reducing heat loss while maintaining the structural integrity and light transmission properties of the steel frame.
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 solution effectively secures the glazing bar to the glazing bead, preventing it from falling off, even when subjected to pulling forces, thus enhancing the thermal insulation and aesthetic appearance of the window.
Implementation Method 1
at least one end of the glazing bar comprising a spring-loaded pin to engage with an aperture in the glazing bead
Data Source
AI summary
For use in a window (10) that comprises a glazing unit (12) with at least one pane of glass, an assembly comprises a glazing bead (14) to extend around the periphery of the glazing unit (12) and defining apertures (17) at locations at which a glazing bar (16) is to fit, and at least one glazing bar (16) to extend across a face of the glazing unit (12), at least one end of the glazing bar (16) comprising a spring-loaded pin (20) to engage with an aperture (17) in the glazing bead (14). For example each glazing bar (16) may comprise spring-loaded pins (20) at each end, or alternatively a spring-loaded pin (20) at one end and a fixed projecting pin at the other end.