Lock mechanism

A method of operating a cylindrical lock having a rotatable handle which is operatively connected to a latch bolt which is biased in an extended position from an enclosure cover, comprising:

• securing a locking plate with a lockout member, wherein the locking plate is biased linearly to lock the latch bolt in the extended position and is operatively connected to the rotatable handle;
• releasing the lockout member and retracting the latch bolt by turning the rotatable handle;
• extending one or more retainers from within the enclosure cover in response to retracting the latch bolt;
• and
• releasing the latch bolt by applying a force to the one or more retainers to move the one or more retainers inwardly of the enclosure cover.

A method of operating a cylindrical lock having a rotatable handle which is operatively connected to a latch bolt which is biased in an extended position from an enclosure cover, comprising:

• securing the latch bolt in the extended position with a lockout member which is operatively connected to the rotatable handle;
• rotating the rotatable handle to release the lockout member and retract the latch bolt to a retracted position;
• extending one or more retainers from within the enclosure cover to secure the latch bolt in the retracted position;
• and
• releasing the latch bolt to the extended position by applying a force to the one or more retainers to move the one or more retainers inwardly of the enclosure cover;
• wherein a locking plate is biased linearly to hold the latch bolt in the extended position and is secured by the lockout member, wherein the locking plate engages the rotatable handle and a latch plate which is slidably connected to the locking plate, wherein the lockout member pivots in response to movement of the locking plate, and wherein the lockout member selectively blocks movement of the latch plate.

A method of operating a cylindrical lock having a rotatable handle which is operatively connected to a latch bolt which is biased in an extended position from an enclosure cover, comprising:

• securing the latch bolt in the extended position with a lockout member which is operatively connected to the rotatable handle;
• rotating the rotatable handle to release the lockout member and retract the latch bolt to a retracted position;
• extending one or more retainers from within the enclosure cover to secure the latch bolt in the retracted position;
• and
• releasing the latch bolt to the extended position by applying a force to the one or more retainers to move the one or more retainers inwardly of the enclosure cover, wherein one or more flush bolts are released by the force applied to the one or more retainers.