Patent ID: 8117876

Claim:
A programmable lock cylinder assembly comprising: a lock housing having a body defining a tubular opening; a cylinder plug having a body mounted for rotation within the tubular opening, the cylinder plug including a single keyway extending therein; a set of rack pins in the cylinder plug and moveable between a locked position wherein the cylinder plug is rotationally locked relative to the housing and an unlocked position wherein the cylinder plug is rotational relative to the housing; a set of tongue pins in the cylinder plug extending across the single keyway, each tongue pin selectively engagable with a respective rack pin; a re-combinating member engaged with the tongue pins and moveable between a first position wherein the tongue pins are engaged with the rack pins and a second position wherein the tongue pins are disengaged from the rack pins; and a reset actuator positioned within the cylinder plug with a portion aligned with the single keyway such that when a reset key is positioned in the single keyway it engages the reset actuator, the reset actuator moveable between an engaged position wherein the re-combinating member position is locked relative to the cylinder plug and a non-engaged position wherein the re-combinating member position is moveable relative to the cylinder plug.