Modular removable core cylinder assembly

A removable core cylinder assembly which is disposed in a lock housing to operate a lock, comprising:

• a cylinder shell having an axial bore formed therein and extending along an entire axial length thereof, said axial bore having an axial recess formed along the entire axial length of said axial bore;
• a cylinder plug rotatably mounted within said cylinder shell and including a sidebar projecting from an opening in an outer peripheral surface of said cylinder plug;
• wherein said cylinder shell has an opening in said axial bore for accommodating said sidebar;
• and
• a locking tab seated disposed in said axial recess of said cylinder shell and extending along an entire axial length of said axial recess, said locking tab having a limited circumferential extent within said cylinder shell, and which locks said removable core cylinder assembly within said lock housing.

A removable core cylinder assembly disposed in a lock housing, comprising:

• a cylinder shell having an axial bore formed therein and extending along an entire axial length thereof, said axial bore having an axial recess formed along the entire axial length of said axial bore;
• a cylinder plug inserted through a front end of said cylinder shell, said cylinder plug being rotatably mounted within said cylinder shell;
• a locking tab seated within and extending along an entire axial length of said axial recess, said locking tab having a limited circumferential extent within said cylinder shell and which locks said removable core cylinder assembly within said lock housing;
• and
• a removable face plate transversely slidably mounted to the front end of said cylinder shell.

A removable core cylinder assembly which is disposed in a lock housing, comprising:

• a cylinder shell having an axial bore formed therein and extending along an entire axial length thereof, said axial bore having an axial recess formed along the entire axial length of said axial bore;
• a cylinder plug having a front portion and a rear portion, said cylinder plug being rotatably mounted within said cylinder shell, and an outer peripheral surface at said front portion of said cylinder plug including a first stepped portion and a second stepped portion, said second stepped portion having a smaller diameter than an outer diameter of said first stepped portion;
• a locking tab seated within and extending along an entire axial length of said axial recess, and having a limited circumferential extent within said cylinder shell, which locks said removable core cylinder within said lock housing;
• and
• a face plate having a ring portion and a solid portion, said ring portion having a stepped portion at an inner periphery of said ring portion;
• wherein said first stepped portion and said second stepped portion of said cylinder plug are seated in said stepped portion of said inner periphery of said ring portion.