Multi-Loop Cable Lock for Industrial Switch Cover Security
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Solution Overview
Problem
Service personnel often damage flow or pressure switches by removing covers to prevent alarms during maintenance, leading to fitting issues, exposure to weather, and potential safety hazards due to inoperative switches during emergencies.
Innovation Solution
A multi-loop cable lock is designed to secure the removable cover of flow or pressure switches to their base, using a first loop portion around the fluid line tap and a second loop portion at a 90° angle around the cover, with a key lock mechanism for easy installation and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If service personnel remove the cover from the switch base to prevent alarm triggering during maintenance, then they can access the switch activator to block alarm triggering, but the cover no longer fits properly on the base, exposing the switch to weather and moisture
Solution Approach 1:
A cable lock with two loop portions serves as an intermediary device between the cover and base. The first loop portion wraps around the fluid line tap head below the base, and the second loop portion wraps around the cover, locking it in place. This allows service personnel to securely access the switch activator during maintenance while maintaining proper cover-to-base fit and protection from environmental elements.
2Ease of operation
If service personnel break off portions of the switch assembly to remove the cover, then they can access the switch activator, but damage is done to the switch assembly requiring expensive repairs
Solution Approach 1:
The cable lock acts as a non-damaging intermediary that provides the necessary access control without requiring any modification or damage to the switch assembly. The lockable mechanism allows the cover to be securely removed and replaced during maintenance operations, preserving the integrity of the entire switch assembly and avoiding expensive repairs.
3Reliability
If a locking mechanism is added to prevent unauthorized cover removal, then unauthorized access is prevented, but the device complexity increases
Solution Approach 1:
The locking mechanism is segmented into two separate loop portions that can independently wrap around different components (fluid line tap head and cover). This segmentation allows for a relatively simple overall structure that provides effective locking functionality without requiring a complex integrated locking system.
Solution Approach 2:
Instead of adding a complex active locking mechanism to the switch assembly itself, the invention uses a passive cable lock that relies on the existing structural elements (fluid line tap head and cover) to create the locking effect. This inverted approach prevents unauthorized access while maintaining simplicity.
Data Source
AI summary
Disclosed is a cable lock particularly configured for securing the cover of a control switch, such as a fluid flow or pressure switch used in industrial pressurized air and water delivery systems that include a fluid line tap, a base, a flow or pressure switch mounted on the base, and a switch cover removably attached to the base and covering the switch. The cable lock is specially configured with a first loop portion that wraps around the fluid line tap, and a second loop portion attached to the first loop portion and positioned at approximately 90° to the first loop portion that wraps around the switch cover so as to prevent unauthorized removal of the cover and unauthorized access to the switch.