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INTRODUCTION Key and Lock Mechanism This diagram shows the way a key opens its corresponding lock. When the key is inserted into the lock, its grooves raise spring-loaded pins of corresponding sizes. This permits the key to turn the cylindrical plug and open the lock. Only a key with grooves that exactly correspond to the size of the pins will permit the plug to rotate in the lock barrel. Lock (fastening device) , mechanical device used for fastening doors, chests, and lids, consisting essentially of a bolt guarded by a mechanism released by a key or a combination. Mechanical Bolt Lock   Mechanical Bolt Lock A bolt lock functions when a key is inserted into the notch, or talon. The key moves the bolt backward or forward, depending on whether the user is opening or closing the lock. Encarta Encyclopedia Michael Boys/Corbis ...

© Getty Images/Finnbarr Webster Prince Harry Prince Harry reportedly has a secret Twitter account that he uses to follow royal correspondents. Royal commentator Omid Scobie is convinced that the Duke of Sussex has a Twitter account, where he uses a fake name. He told Yahoo’s The Royal Box that the Duke of Sussex himself has told him that he follows several royal correspondents to see what they are up to. Prince Harry also wants to always be in the know when it comes to what is being written about his wife, Meghan Markle. “He would come up during a royal tour and say, ‘I saw what you wrote yesterday’ and ‘I’ve got my eyes on you.’ It was all very fun but I think Harry does pay close attention to what’s being written about him and of course now, his wife,” Scobie said.  There have also been reports claiming that Markle created her own secret Instagram account over the holidays. However, online trolls made her feel unsafe. But a few days later, the social media account was sudde...

Willy Caballero is in line to earn a new Chelsea contract – as long as the club can fill their home-grown quota. Goalkeeper Caballero won widespread praise for the way in which he coped with Kepa Arrizabalaga’s refusal to be replaced by him in Chelsea’s Carabao Cup final penalty shootout defeat to Manchester City. It is understood that Chelsea had already hoped to offer Caballero a 12-month extension to his contract that is due to expire at the end of the season before the Kepa incident.  But his reaction has further strengthened the feeling around the club that the 37-year-old Argentine should be kept on due to his professionalism on and off the pitch.   Chelsea are currently assessing how they will fill their Premier League and European home-grown places next season, with Gary Cahill, Danny Drinkwater and Victor Moses all expected to leave, and 39-year-old Robert Green’s contract also due to expire. The Blues generally fill one of their home-grown spots with a goalkeeper, w...