WebFeb 20, 2024 · When the door is closed, a connection inside the lock powers an electrical coil wrapped round the bi metal part. This heats up the metal, which then bends. This bending operates the lock and then makes another electrical connection passing power to the rest of the machine. Once power is turned off, the metal strip cools down after a minute or ... WebApr 5, 2024 · New technology is making it possible to control valves and locking devices without the need for any additional sensors. A metal piston, a tiny chip and small pulses of current—that's all that the drive systems specialists led by Professor Matthias Nienhaus of Saarland University need for their sustainable and cost-effective technology.
Valves and locking devices can open halfway and close softly …
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How to Change a UPVC Door Lock: 9 Steps (with Pictures) - WikiHow
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