[PAR] [TLE] Blish lock [SEP] The Blish Lock is a breech locking mechanism designed by John Bell Blish based upon his observation that under extreme pressures, certain dissimilar metals will resist movement with a force greater than normal friction laws would predict.  In modern engineering terminology, it is an extreme manifestation of what is now called static friction, or "stiction".  His locking mechanism was used first in the Thompson submachine gun. [PAR] [TLE] Thompson submachine gun [SEP] The Thompson submachine gun is an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era.  It was a common sight in the media of the time, being used by both law enforcement officers and criminals.  The Thompson submachine gun was also known informally as the "Tommy Gun", "Annihilator", "Chicago Typewriter", "Chicago Piano", "Chicago Style", "Chicago Organ Grinder", "Trench Broom", "Trench Sweeper", "The Chopper", and simply "The Thompson".
[PAR] [TLE] Blish lock [ SEP ] The Blish Lock is a breech locking mechanism designed by John Bell Blish based upon his observation that under extreme pressures , certain dissimilar metals will resist movement with a force greater than normal friction laws would predict . In modern engineering terminology , it is an extreme manifestation of what is now called static friction , or " stiction " . His locking mechanism was used first in the Thompson submachine gun . [PAR] [TLE] Thompson submachine gun [ SEP ] The Thompson submachine gun is an American submachine gun , invented by John T. Thompson in 1918 , that became infamous during the Prohibition era . It was a common sight in the media of the time , being used by both law enforcement officers and criminals . The Thompson submachine gun was also known informally as the " Tommy Gun " , " Annihilator " , " Chicago Typewriter " , " Chicago Piano " , " Chicago Style " , " Chicago Organ Grinder " , " Trench Broom " , " Trench Sweeper " , " The Chopper " , and simply " The Thompson " .
Who invented the gun where  The Blish Lock was first used?
Who invented the gun where The Blish Lock was first used ?
John T. Thompson
John T. Thompson