Linear lock

A lock comprising:

• a housing;
• a lock barrel having a first end configured to receive a key along an insertion axis and a second end, opposite the first end, the lock barrel includes a plurality of tumbler passageways open to the second end, wherein each of the plurality of tumbler passageways extends substantially parallel with the insertion axis;
• a plurality of tumblers and corresponding tumbler springs received in the plurality of tumbler passageways, wherein the plurality tumblers are movable parallel to the insertion axis against a bias from the tumbler springs upon insertion of the key;
• a sidebar extending through an aperture of the lock barrel and constrained thereby to movement along a linear path perpendicular to the insertion axis, the sidebar is engageable with a notch of the tumblers when the sidebar moves radially inward relative to the insertion axis,
• wherein the sidebar includes a cam surface slidable against the housing when the lock barrel rotates about the insertion axis and a projection having a single-ramped surface that is received within the notch of each tumbler when the lock barrel is in the unlocked state.

A linearly-actuated lock comprising:

• a lock cylinder defining an insertion axis for receiving a key at a front axial end;
• a plurality of tumblers and corresponding tumbler springs are received in passageways in the lock cylinder, wherein the plurality of tumblers are movable parallel to the insertion axis against a bias from the tumbler springs upon insertion of the key;
• a sidebar movable radially inward relative to the insertion axis in response to movement of the plurality of tumblers in a direction parallel to the insertion axis;
• a lock driver is removably coupled to the lock cylinder, the lock driver does not enclose the tumblers, the tumbler springs, or the sidebar,
• wherein the sidebar includes a cam surface and a projection having a single-ramped surface, wherein the single-ramped surface is capable of being received within a notch of each tumbler, and
• wherein the single-ramped surface faces a rear axial end of the lock, opposite the front axial end.