초록 ▼

Several new components are provided for a mortise lock. First, a non-handed clutching assembly, including a pair of spindle hubs rotatable within a pair of outer operating cams, is provided for a mortise lock. Second, a spindle-mounted lock-handing selector—which can be removed from one side of the

Several new components are provided for a mortise lock. First, a non-handed clutching assembly, including a pair of spindle hubs rotatable within a pair of outer operating cams, is provided for a mortise lock. Second, a spindle-mounted lock-handing selector—which can be removed from one side of the lockset body while the lockset body is installed in the mortise of a door—is provided to set the handing of the clutching assembly. Third, an escapement mechanism is provided for a reciprocating-slide-based clutchworks, enabling the slides to move into a position biasing a clutch lever arm toward a hub-coupling position, even if the outer and spindle hubs are misaligned. Fourth, a guardbolt-actuated blocking assembly for a lockset is provided to block movement of the stop works or clutchworks when the door is closed and the outside door handle is disabled.

대표청구항 ▼

1. A mortise lockset comprising: a mortise lockset case configured for insertion into a door mortise;a latchbolt enclosed at least partially within the mortise lockset case and guided for movement between positions in which the latchbolt extends out of the case and in which the latchbolt is substant

1. A mortise lockset comprising: a mortise lockset case configured for insertion into a door mortise;a latchbolt enclosed at least partially within the mortise lockset case and guided for movement between positions in which the latchbolt extends out of the case and in which the latchbolt is substantially retracted within the case;a latch retractor, enclosed within the mortise lockset case, operable to retract the latchbolt;a hub assembly, enclosed within the mortise lockset case, operable to drive the latch retractor into a latchbolt-retracting position;opposite first and second handle-operated spindles engaging the hub assembly;a lock-handing selector operable to be assembled to the lockset to enable a selected one of the first and second handle-operated spindles to operate the hub assembly to drive the latch retractor into the latchbolt-retracting position;wherein the lock-handing selector is operable to be changed from a first selectable configuration operatively enabling the first handle-operated spindle to retract the latchbolt to a second selectable configuration, distinct from the first selectable configuration, enabling the second handle-operated spindle to retract the latchbolt, and vice versa, without opening the mortise lockset case; anda user-actuated clutch enclosed within the mortise lockset case operative between engaged and disengaged positions in accordance with a user-selectable setting;wherein the clutch, when engaged, rotationally interlocks a non-selected one of the first and second handle-operated spindles, opposite the selected handle-operated spindle, with a latch-retracting actuating portion of the hub assembly, thereby operatively enabling the non-selected spindle to retract the latchbolt;wherein the clutch, when disengaged, rotationally decouples the non-selected spindle from the latch-retracting actuating portion of the hub assembly, thereby allowing the non-selected spindle to turn without retracting the latchbolt; andwherein operative rotation of either handle-operated spindle does not rotate the opposite handle-operated spindle, even when the user-actuated clutch is engaged. 2. The mortise lockset of claim 1, wherein the lock-handing selector is operable to be removed from the mortise lockset case without opening the mortise lockset case. 3. The mortise lockset of claim 1, wherein the clutch is adapted, when engaged, to simultaneously operatively enable both handle-operated spindles to retract the latchbolt, independent of the selected configuration of the lock-handing selector, without causing operative rotation of either handle-operated spindle to rotate the opposite handle-operated spindle. 4. The mortise lockset of claim 1, wherein the hub assembly comprises a spindle hub subassembly selectively coupled for cooperative rotation with a coaxial cam subassembly. 5. The mortise lockset of claim 4, wherein the spindle hub subassembly is nested for rotation within the coaxial cam assembly. 6. The mortise lockset of claim 4, wherein the spindle hub subassembly comprises a pair of independently rotatable spindle hubs. 7. The mortise lockset of claim 5, wherein the coaxial cam subassembly comprises two independently rotatable operating cams. 8. The mortise lockset of claim 7, wherein the two independently rotatable operating cams of the coaxial cam subassembly each cam the latch retractor, which is mounted for pivotal rotation about an axis eccentric to that of the hub assembly. 9. The mortise lockset of claim 1, wherein: the hub assembly comprises a pair of coaxial cams, each operable to rotate, independently of the other, both counterclockwise and clockwise with respect to a rotationally intermediate position;the rotationally intermediate position does not drive the latch retractor into a latchbolt-retracting position; androtation of any one of the coaxial cams in either the clockwise direction or the counterclockwise directions from the rotationally intermediate position operates to drive the latch retractor into a latchbolt-retracting position. 10. The mortise lockset of claim 9, further comprising divaricate cam projections on each of the coaxial cams adapted, when rotated in both clockwise and counterclockwise directions, to drive the latch retractor into a latchbolt-retracting position. 11. The mortise lockset of claim 1, further comprising a faceplate-accessible user-selectable clutchworks, operatively coupled to the user-actuated clutch, enabling a user to selectively engage and disengage the user-actuated clutch. 12. The mortise lockset of claim 11, wherein the user-selectable clutchworks comprises a user-actuated rocker with a clutch dog to enable the user to selectively engage and disengage the clutch. 13. The mortise lockset of claim 11, wherein the user-selectable clutchworks comprises a pair of buttons recessed in a faceplate of the mortise lockset. 14. The mortise lockset of claim 11, wherein the user-selectable clutchworks comprises a pair of interlinked reciprocating slides. 15. The mortise lockset of claim 11, further comprising a spring-biased escapement mechanism, wherein the escapement mechanism: enables a user to toggle the user-accessible clutchworks into the clutch-engagement position even when a corresponding portion of the hub assembly is rotationally misaligned with respect to the user-actuated clutch, the misalignment preventing the clutch from operatively engaging the corresponding portion of the hub assembly; andspring biases the user-actuated clutch into operative clutching engagement with the corresponding portion of the hub assembly after that portion rotates into a rotationally aligned position. 16. The mortise lockset of claim 15, further comprising a hub assembly biasing spring that biases a latch-retracting actuating portion of the hub assembly into a non-latch-retracting position. 17. The mortise lockset of claim 1, wherein the clutch comprises a pivotally-mounted lever arm operative to move a rotationally interlocking clutch link between engaged and disengaged positions with respect to the latch-retracting portion of the hub assembly. 18. The mortise lockset of claim 17, wherein the clutch is operable to move between engaged and disengaged positions when: a latch-retracting actuating portion of the hub assembly is in a non-latch-retracting rotational position; andboth the first and second handle-operated spindles are in default spring-biased positions. 19. The mortise lockset of claim 17, further comprising an arcuate slot, provided in the lever arm, to guide the user-actuated clutch and enable the clutch link to rotate, with a latch-retracting actuating portion of the hub assembly, along an arc that is coaxial with the spindles. 20. The mortise lockset of claim 17, further comprising: a pair of interconnected slides operative to urge the lever arm up or down; anda leaf spring mounted on one of the slides that is operative, in a spring-enabling position of the slide, to bias the lever arm toward a clutch-engaging position, and that is inoperative, in a spring-disabling position of the slide, to bias the lever arm toward a clutch-engaging position. 21. The mortise lockset of claim 1, wherein the lock-handing selector is mounted on and in surface contact with the selected handle-operated spindles. 22. The mortise lockset of claim 21, wherein the lock-handing selector is mounted on the selected handle-operated spindle for rotation therewith. 23. The mortise lockset of claim 22, wherein the lock-handing selector is mounted, externally of the mortise lockset case, on the selected handle-operated spindle. 24. The mortise lockset of claim 23, wherein the lock-handing selector and the selected handle-operated spindle on which it is mounted are operable to be removed from one side of the mortise lockset case and replaced on an opposite side of the mortise lockset case while the mortise lockset case is installed in a door mortise.