| 摘要 |
The present invention provides a permutation lock 10 comprising a housing 12-16 and a securing element 18 supported by the housing 12-16 for movement into and out of securing engagement for closing and opening the lock 10. A locking structure 50, 52 and structure 118 for controlling its operation whereby the securing element 18 may be opened by an authorised user are supported within the housing 12-16. The control structure generally includes a shaft 88, a plurality of permutation wheels 20 each carrying indicia in a sequence about its outer periphery, and an equal number of cam elements 104. Both the permutation wheels 20 and the cam elements 104 are supported for rotation on the shaft 88 and arranged alternately there-along in associate pairs of permutation wheels 20 and cam elements 104. The cam elements 104 normally are engaged with the associated wheel 20 in a first position, rotationally movable conjointly with the wheel 20 when the wheels 20 are selectively rotated from one angular position to another, and provide control to the locking structure 50, 52 to permit opening of the lock 10 when the permutation wheels 20 and cam elements 104 are angularly located to a preset combination. |
