Universal Switch Restraint Device for Circuit Breakers
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Solution Overview
Problem
Existing switch restraint devices are often bulky, costly, and incompatible with different brands of circuit breakers, posing safety risks and inefficiencies in restraining switches for repair or installation purposes.
Innovation Solution
A universal switch restraint device featuring a collar member with a channel and a lever arm that extends beyond the channel's width, allowing adjustable engagement with various switch handles and housing configurations, preventing movement between ON and OFF positions through a blocking member that contacts the switch panel externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manufacturer-specific restraint device is designed to interface with a particular circuit breaker switch, then the device can effectively restrain that specific switch, but the device becomes incompatible with circuit breaker switches from other manufacturers
Solution Approach 1:
The restraint device is designed with a universal interface that can accommodate circuit breaker switches from different manufacturers. The blocking member is configured to engage with common features found across multiple switch designs, allowing a single restraint device to effectively restrain switches from various brands while maintaining reliability.
2Reliability
If the restraint device is designed to match the exact dimensions of the switch handle, then it provides precise restraint, but the device becomes bulky and requires significant material
Solution Approach 1:
The invention extracts only the essential restraining function from the switch handle dimensions. Rather than creating a blocking member that matches the full width of the handle, the design identifies and engages only the critical engagement features necessary for effective restraint, thereby reducing material usage while maintaining restraint precision.
Solution Approach 2:
The blocking member is designed to engage with specific local features of the circuit breaker switch rather than spanning the entire width of the handle. This localized engagement approach provides precise restraint at the critical interface points while minimizing the overall size and material requirements of the restraint device.
3Ease of operation
If an incompatible restraint device is placed on a circuit breaker, then installation may be attempted, but the device fails to restrain the switch properly creating safety risks
Solution Approach 1:
The restraint device incorporates a universal engagement mechanism that is designed to work with circuit breaker switches from multiple manufacturers. This ensures that the device can be easily installed on various switch types while maintaining reliable restraint functionality, eliminating the safety risks associated with incompatible devices.
Data Source
AI summary
A universal restraint device for a switch handle includes a channel adapted to accommodate the switch handle. The channel includes a base wall, first and second side walls that extend generally perpendicularly from the base wall, and first and second feet that extend toward one another from distal ends of the first and second side walls. The channel includes a width defined by a distance measured between the first and second side walls. A lever arm extends from the base wall a distance greater than the width of the channel.