Abstract: A cylinder type combination lock comprising a housing formed with windows arranged in a row, a corresponding number of disk dials accommodated in the housing for respective rotation therein, each dial having a slit and an operation lever projecting through the concerned window for angularly moving the dials, and a key-like member insertable in the housing, wherein the angular positions of the slits relative to the respective operation lever are formed in such a way that by setting the operation levers in a predetermined arrangement of various angular positions, all slits are put in alignment for unlocking.

Abstract: A cylinder type combination lock which is capable of being set in any desired combination of numbers and the like or changed from the once set specific combination to any other combination without using any tool.