Abstract: A combination lock comprises a bolt which is withdrawn by depressing a bolt pin which is shielded by rotating discs having a movable disc pin within them. A selector pin attached to a dial is provided for engaging in selector holes in the discs and aligning the disc pins with one another and with the bolt pin, with provision for pushing inwardly the disc pin on the outer disc and urging the other disc pins aligned therewith towards the bolt pin such that it is depressed and/or withdrawn. The discs have a weight attached at their circumference such that, during code setting, changing the position of the weight changes the relative angular position of the disc pin. When pressure is released from the mechanism, springs return the selector pin and the disc pins to their original positions and the weights on the discs fall, thereby rotating the discs and automatically scrambling the code.

Abstract: A combination lock comprises a bolt which is withdrawn by depressing a bolt pin which is shielded by rotating discs having a movable disc pin within them. A selector pin attached to dial means is provided for engaging in selector holes in the discs and aligning the disc pins with one another and with the bolt pin, means being provided for pushing inwardly the disc pin on the outer disc and urging the other disc pins aligned therewith towards the bolt pin such that it is depressed and/or withdrawn. The discs have a weight attached at their circumference such that, during code setting, changing the position of the weight changes the relative angular position of the disc pin. When pressure is released from the mechanism, springs return the selector pin and the disc pins to their original positions and the weights on the discs fall, thereby rotating the discs and automatically scrambling the code.