Safety Limiter Cable Mechanism for Heavy Window Casements
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Solution Overview
Problem
The increased use of safety glass in windows requires stronger hinges and fittings to manage the greater forces involved, and existing solutions do not effectively limit the movement of window casements to prevent impact damage.
Innovation Solution
A safety limiter system comprising a cable with a bulge and angle fitting, integrated into a sleeve and fitting, limits the movement of window casements by preventing the cable from passing through the sleeve, while an installation tool facilitates secure fastening to the window frame, ensuring the cable's tensile strength and rigidity support the weight of the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety glass is used in window panes, then the window provides better safety and protection, but the weight of the window increases, causing greater strain on hinges and fittings
Solution Approach 1:
The patent employs a cable mechanism that acts as a counterweight system to support the heavy safety glass window. The cable is tensioned to bear the window's weight, reducing the load on hinges and fittings. This allows the window to maintain its safety glass construction without overwhelming the mechanical support structures.
Solution Approach 2:
The cable serves as an intermediary element between the window and the support structure. Rather than relying solely on hinges and fittings to support the entire weight, the cable mediates the load transfer, distributing the force and reducing stress on the primary mounting points.
2Ease of operation
If the window movement is not limited, then the window can open freely, but it may stop upon impact on solid objects causing damage
Solution Approach 1:
The cable mechanism is pre-tensioned to provide preliminary counter-action against the window's movement. As the window opens, the cable gradually engages and provides resistance before the window can gain enough momentum to cause impact damage. This preliminary anti-action prevents the window from moving too far or too quickly.
Solution Approach 2:
The cable system provides dynamic control of window movement rather than rigid restriction. The cable tension adjusts based on the window's position and movement speed, allowing free movement within safe limits while automatically providing resistance when the window approaches dangerous movement thresholds.
3Ease of operation
If a cable mechanism is used to limit window movement, then the window movement is restricted, but the installation and secure fastening becomes more complex
Solution Approach 1:
The patent combines multiple functions into integrated components. The cable mechanism is merged with the window frame and support structure, where the cable anchors are incorporated into the existing frame architecture. This integration reduces the number of separate installation steps and simplifies the overall installation process despite the added functionality.
Data Source
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AI summary
A safety limiter (100) and an installation tool (200) for the safety limiter. The safety limiter (100) comprises a sleeve (102) to be inserted in a hole (106) in the frame element (104), the opening (108) of the hole (106) being arranged on the outer surface of the frame element (104) facing the cover element (110), and the hole (106) of the opening (108) extending in the frame element (104) in the depth direction (112) of the frame element (104), and a pull transmitting means (114) comprising a first end with bulge (116) for limiting the movement of the pull transmitting means (114) through the sleeve (102), and a second end (122) provided with an angle fitting (112); and a fitting (126) comprising a front edge (132), and the fitting (126) comprising a hole (128) extending in the fitting (126) substantially in the direction (111) of the outer surface of the cover element (110); wherein the angle fitting (122) and the hole (128) are matched with each other, wherein at least part of the angle fitting (122) can be received in the hole (128) for limiting the movement of the cover element (110) from the frame element (104) to a distance where the pull transmitting means (114) is pulled through the sleeve and fastened by the angle fitting (122) to the fitting (126), and the bulge (116) is supported to the sleeve, wherein the weight of the cover element (110) can be supported to the frame element (104) via the pull transmitting means (114).