Hand-Operated Safety Switch With Electronic Time Delay

The patent replaces mechanical time delay means with electronic time delay means. The electronic control unit processes signals electronically to achieve the time delay function, eliminating mechanical moving parts that are prone to failure. This substitution significantly improves reliability while maintaining the time delay functionality required for safe operation sequencing.

The patent introduces an electronic control unit as an intermediary between the operating element and the locking mechanism. This electronic intermediary processes the operating signal, implements the time delay logic, and controls the unlocking sequence, replacing direct mechanical linkages and improving overall system reliability through electronic control.

The patent replaces the mechanical slot-based actuator interface with an electronic or electromagnetic interface. The operating element communicates with the electronic control unit through non-mechanical means (such as electromagnetic coupling or electronic signals), eliminating the physical slot that allows dust ingress and unauthorized mechanical manipulation, while maintaining ease of operation through contactless or sealed interaction.

The patent employs sealed enclosures and protective barriers (such as sealed housings or electromagnetic shielding) that prevent dust and dirt from entering the internal components while allowing the operating element to function. This sealing approach maintains safety by preventing contamination without compromising the ease of operation, as the sealed interface still allows for user interaction.

The patent merges the signal transmission function and power supply function into integrated printed circuit board traces and internal conductors. Instead of using separate external wires for signal and power connections, the electronic control unit and switching means are interconnected through integrated circuit pathways, reducing vulnerability to external interference and physical damage while maintaining manufacturing feasibility.

The patent replaces external wire connections with internal printed circuit board traces and embedded conductors. The electrical connections between components are formed through PCB routing and soldering rather than external wire harnesses, eliminating the vulnerability of exposed wires to interference, damage, and disconnection while maintaining ease of manufacture through standard PCB fabrication processes.

The patent replaces the purely mechanical locking mechanism with an electronically controlled locking system. The electronic control unit processes operating signals, implements safety logic, and controls the unlocking sequence electronically. This electronic control prevents negligent or fraudulent operation by requiring proper sequencing and validation, while maintaining ease of operation through user-friendly electronic interfaces.

The patent incorporates feedback mechanisms where the electronic control unit monitors the state of the locking mechanism and operating elements. The system provides feedback signals to validate proper operation sequencing, ensure safety conditions are met before unlocking, and prevent unauthorized or negligent operation. This feedback loop enhances safety while maintaining ease of operation through automated validation.