Patent ID: 8037724

Claim:
A combination lock comprising a coded control mechanism to release a locking member from its locked condition, wherein the coded control mechanism comprises: a plurality of rotatable carrier means with a rotational axis, each carrier means comprising a rotatable carrier plate having an arcuate array of openings centred on the rotational axis, each of said openings being selectively engageable by a selector pin that is rotatable by depressible dial means, the progressive depression and rotation of which effects engagement of the selector pin with a said opening in progressively each of the rotatable carrier plates, characterized in that each carrier plate has an aperture therethrough, said apertures being equi-spaced radially from said rotational axis, an insert in each said aperture is slidable laterally of the associated carrier plate and is expressible laterally from its associated carrier plate when and only when all the inserts attain a state in which they are in mutual alignment, the attainment of said state enabling the control mechanism to operate on the locking member and effect its release from the locked condition.