Vibrational Tumbler Decoding for Lock Cut Identification
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Solution Overview
Problem
Existing mechanical locks are difficult to unlock when keys are lost, as trying all possible combinations is impractical and picking or breaking the lock is often necessary, especially for locks with a high number of possible key cuts.
Innovation Solution
A method and apparatus that stimulate tumblers in a mechanical lock with mechanical energy, detect vibrational responses, and process these responses to determine the specific cut of the tumbler, allowing for the manufacture of a complementary key without picking or disassembling the lock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all possible key cuts are tried in turn to unlock a lock, then the lock can be unlocked, but the time required becomes impractically long when the number of possible cuts is very high
Solution Approach 1:
The patent replaces the mechanical trial-and-error method of trying keys with a physical measurement system. A transducer applies mechanical energy to the tumblers and detects their vibrational responses, substituting the mechanical key-trial process with a measurement-based identification process that determines the lock's cut configuration without physically testing each key
Solution Approach 2:
The patent creates a vibrational response profile or signature of the lock's tumblers that serves as a copy or representation of the lock's cut configuration. This vibrational signature can be analyzed to determine the correct key cuts without physically possessing or testing the actual key, effectively copying the lock's security characteristics for analysis
2Loss of information
If a lock is picked to determine its cut, then the lock can be unlocked and the cut can be determined, but the lock mechanism is damaged or altered
Solution Approach 1:
The patent replaces the invasive mechanical picking process with a non-contact or minimal-contact measurement system. The transducer detects vibrational responses that reveal the tumbler cuts without requiring the mechanical manipulation needed for picking, thereby obtaining lock information without damaging the mechanism
Solution Approach 2:
The patent introduces vibrational energy as an intermediary between the measurement device and the lock mechanism. Instead of directly manipulating the tumblers through picking, the system uses vibrational stimulation and detection to indirectly probe the tumbler configurations, obtaining cut information without direct mechanical interference that could cause damage
3Loss of information
If a lock is disassembled to determine the cut, then the cut can be read directly, but the lock cannot be reassembled to its original secure state
Solution Approach 1:
The patent replaces the disassembly process with a vibrational measurement system that can determine cuts through the intact lock structure. The transducer can stimulate and detect tumbler vibrations through the keyway or existing openings, eliminating the need to disassemble the lock while still obtaining cut information
Solution Approach 2:
The patent obtains a copy of the cut information through vibrational analysis without physically exposing the tumblers by disassembly. The vibrational response profile serves as a proxy for direct visual inspection of the cuts, allowing information extraction while maintaining the lock's structural integrity and reassemblability
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
Enables the determination of a lock's cut without dismantling it, facilitating the creation of a matching key and unlocking the lock, applicable to various types of locks, including pin-, wafer-, disc-, and lever-tumbler locks, by analyzing vibrational responses to identify the correct key configuration.
Implementation Method 1
stimulating the tumbler with mechanical energy; detecting the vibrational response of the tumbler to the stimulation
Implementation Method 2
Different cuts of tumbler will therefore exhibit different vibrational responses to stimulation by mechanical energy
Data Source
AI summary
In order to determine the particular cut possessed by a tumbler of a mechanical lock, the tumbler is stimulated with mechanical energy. The vibrational response of the tumbler is detected, and the detected response is used in determining which cut of the plurality of possible cuts the tumbler possesses. The cut of a lock tumbler is defined by its shape and/or size. For example, in the case of a pin-tumbler lock, the cut of a pin is defined by its length. Different cuts of tumbler will therefore exhibit different vibrational responses to stimulation by mechanical energy, and these different vibrational responses can be used to determine which cut the tumbler possesses, for example by comparing with the vibrational responses of real or modeled tumblers with known cuts. The response may be detected while the tumbler is being stimulated, and the responses to different frequencies of stimulation may be detected and processed.