Anti-break lock mechanism with l-shaped bolts.

Реферат: AN ANTI-BREAK LOCK MECHANISM WITH L-SHAPED BOLTS INCLUDING ONE PAIR OF L-SHAPED HOOK BOLTS DRIVEN TO MOVE INTO A LOCKING POSITION BY MEANS OF A PLUG THROUGH TWO GUIDE PLATES SO AS TO LOCK UP WITH THE SLOT OF THE CATCHING PLATES MOUNTED ON THE DOOR FRAME TO REINFORCE THE LOCKING MECHANISM OF THE DEVICE AND TO PROTECT THE DEVICE AGAINST VIOLENCE. THE INNER KNOB IS CONNECTED WITH THE RECTANGULAR ROD AT ONE END SUCH THAT THE RECTANGULAR ROD MAY BE DRIVEN BY THE INNER KNOB TO LET THE RECTANGULAR PORTION INSERT INTO OR RELEASE FROM THE RECTANGULAR HOLE OF THE OUTER KNOB SO AS TO DETERMINE IF TO CARRY THE LATCH BOLT TO MOVE INTO A LOCATING POSITION. THE PLUG IS HAVING AN INNER KEY HOLE WITH A CIRCULAR GROOVE MADE THEREON TO PROTECT THE INNER KEY FROM BREAKING AWAY WHEN IT IS INSERTED THEREINTO. THROUGH THE DOUBLE-KEY HOLE ARRANGEMENT OF THE PLUG, THE LOCKING DEVICE MAY BE LOCKED UP TO PREVENT FROM TURNING TO OPEN THROUGH THE INNER KNOB. (FIG. 1)