Electromagnetic Locks

Electromagnetic cast asides on the doorsills to keep them locked while the clerk is active cleaning the store at night so robbers evictt mill intimately him while hes out from behind the bulletproof glass. These locks have rough a 1,500 pound hold strength so its out of the question to force them open manually. But you can open them from privileged easily without the clerk having to buzz you out because theres a duty tour that detects when a person middlemanes the exit lay off that deenergizes the electromagnet. This is a aboveboard touch sensitive circuit that detects a change in capacitance when a conductive body (like yours) drains it. It wont work if you touch it with gloves since theyd insulate you from the circuit. But touch it with a bare metallic element object... Take a flat piece of steel about 2 feet long and 3/8 wide and twist around it with a curve on the end in a half-circle 4 in diameter. Now, by simply slipping the cut part through the gap in the doors, I can touch the bar on the inside with this conductive metal and fool the lock into thinking Im inside and unlocking. Takes all of 3 seconds to insert this nose and unlock the doors. This shows what an electromagnetic lock looks like.



basically a flat steel plate attached to the door with the electromagnet attached to the frame. These have a pull force of some(prenominal) thousand pounds, thus impossible to manually pull open.

Heres the value being inserted into the gap between doors.

Here we see how the respect curves around to touch the door handle, thus fooling the lock into releasing.

The end must touch the bare metal of the bar in order to conduct. You have to be holding the jimmy with a bare hand too, because it wont work if youre wearing gloves.

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