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Chapter 04 · Applications · 06
Industrial & manufacturing
The sleeper hit: coded-magnet safety interlocks are a regulated, shipping category — because a plain magnet is exactly how workers defeat plain magnetic switches.
Factories buy magnets by the ton for holding, lifting and fixturing. The coded twist is identity: force that answers only to the right partner.
Coded-magnet safety interlocks shipping
Machine-guard switches (IDEM and others) use coded magnetic targets precisely because the classic bypass — taping a fridge magnet to the sensor — defeats a simple switch. Coding defeats the bypass; the approach traces to patent US 4,629,131 and lives in a regulated product category. Arguably the longest-shipping “coded magnet” application anywhere.
Electropermanent quick mold/die change shipping
Magnetic clamping turns die changes from hours to minutes vendor claim (figures are vendor); a mature, shipping category.
Jigs, fixtures & welding grounds shipping
Switchable-magnet workholding (Magswitch et al.) is standard kit — on/off holding force with no clamps in the tool path.
Poka-yoke magnetic keying illustrative
Keyed coded pairs that make wrong assembly physically unattractive — parts that refuse to seat incorrectly. The products exist; documented line deployments don’t, yet.
Thin-sheet de-stacking illustrative
Short-reach coded fields could grab exactly one sheet from a stack — a vendor-suggested use that exploits the exponential decay; treat as illustrative.
The takeaway. Industrial safety already pays for magnetic identity. Every other coded behavior — keying, one-sheet reach, self-fixturing — is the same sale waiting on awareness and second sources.