Abstract: A cylindrical lockset comprises a multiple-compartment lock cage subassembly. A retractor is housed within a middle lock cage compartment. Spindle return torsion springs, for biasing corresponding handle-carrying spindles to their default positions, are housed within axially adjacent lock cage compartments. A torque plate transfers torque from the lock cage subassembly to relatively radially distal trim posts. A knob catch assembly seated in each handle-carrying spindle comprises a generally elliptically-shaped wrap around catch spring and a knob catch backup washer to resist axial loads produced by efforts to pull a handle off of the spindle. A key spindle provides a dog travel window defined by a closed, continuous edge of the key spindle, which window is positioned opposite of an axially-extending seam of the key spindle.

Abstract: A cylindrical lockset comprises a multiple-compartment lock cage subassembly. A retractor is housed within a middle lock cage compartment. Spindle return torsion springs, for biasing corresponding handle-carrying spindles to their default positions, are housed within axially adjacent lock cage compartments. A torque plate transfers torque from the lock cage subassembly to relatively radially distal trim posts. A knob catch assembly seated in each handle-carrying spindle comprises a generally elliptically-shaped wrap around catch spring and a knob catch backup washer to resist axial loads produced by efforts to pull a handle off of the spindle. A key spindle provides a dog travel window defined by a closed, continuous edge of the key spindle, which window is positioned opposite of an axially-extending seam of the key spindle.

Abstract: Caliper mounts are provided that include a shallow channel for receiving a caliper scale bar, a retainer with a stepped cone washer positioned adjacent one side wall of the channel, and one or more shelves cantilevered over an opposite side wall of the channel. The shelves and retainer cooperate to retain the scale bar of a conventional sliding caliper in the channel. One caliper mount is formed as a rectangular miter slot base configured for insertion into the miter slot of a saw or router table. Another caliper mount is formed as cylindrical housing that incorporates a permanent disc magnet. Container shells and molded platforms adapted to mount a sliding caliper perpendicular to an elongated miter slot are also provided.

Abstract: A mortise lock is provided with independently rotatable spindles and a highly accessible lock-handing selector. Also, a clutching mortise lock is provided that enables operative rotation in both directions to retract the latch.

Abstract: A mortise latchset has an improved leveraged cam assembly, completely internal to the latchset body, versatile enough to allow the door handles to be rotated in either direction to retract the latchbolt, and robust enough to independently bias each of two lever-type door handles toward a handle-centering position, even when one of the handles is being operated. The mortise latchset uses a pair of coaxially mounted cam followers independently leveraged by a cantilevered spring assembly. The cam followers are located between the operating cams and the latch retracting assembly, and each leveraged cam follower is operable to engage the latch retracting assembly to retract the latchbolt, while the other cam follower biases its operating cam in the handle-centering position.

Abstract: 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.

Abstract: A mortise lock is provided with independently rotatable spindles and a highly accessible lock-handing selector. Also, a clutching mortise lock is provided that enables operative rotation in both directions to retract the latch.

Abstract: A mortise latchset has an improved leveraged cam assembly, completely internal to the latchset body, versatile enough to allow the door handles to be rotated in either direction to retract the latchbolt, and robust enough to independently bias each of two lever-type door handles toward a handle-centering position, even when one of the handles is being operated. The mortise latchset uses a pair of coaxially mounted cam followers independently leveraged by a cantilevered spring assembly. The cam followers are located between the operating cams and the latch retracting assembly, and each leveraged cam follower is operable to engage the latch retracting assembly to retract the latchbolt, while the other cam follower biases its operating cam in the handle-centering position.

Abstract: 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 hubs, 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 clutch-actuator assembly, enabling the slides to move into a position biasing a locker-carrying lever 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 clutch works when the door is closed and the outside door handle is disabled.

Abstract: Several caliper accessories are provided that make a conventional caliper suitable for more sophisticated applications traditionally reserved for more expensive measurement devices. One of these accessories, a magnetic caliper mounting device, has a shallow scale-bar-mounting channel for receiving the scale bar of the caliper, a retainer adapted to releasably secure the scale bar of the caliper within the channel of the caliper mount, and a magnet associated with the caliper mount to secure the apparatus to a planar metal surface. Another accessory, a caliper jaw extender, is either incorporated into a magnetic caliper mounting device or provided as a spring pack accessory to a magnetic caliper mounting device. The caliper jaw extender has a spring-biased retractor that hooks onto a caliper's movable frame and biases the frame toward an extended position. Kits are also provided comprising various combinations of a conventional caliper and accessories.

Abstract: A lock mechanism includes a torsion bar that prevents movement of a slide bar abutting a swing bolt. The torsion bar engages the swing bar in a direction transverse to sliding movement to prevent undesired movement away from abutting contact with the swing bolt.

Abstract: A reversible latch bolt assembly for a mortise lock. The latch bolt assembly generally comprises a bolt head subassembly having a stem threaded into the rear. The bolt head subassembly engages body designed for anchoring the reversible latch bolt assembly inside a door. The stem is inserted distally into an aperture in the body. A rotary selector assembly is mounted in the body orthogonal to the stem aperture and, when the stem is inserted, selectively engages or disengages the collar of the stem to prevent or allow rotation thereof. The rotary selector assembly is spring biased toward a normally locked position but is rotated to an unlocked position by a hex key or the like. The selector assembly allows free rotation of the bolt head when necessary to reverse the mortise lock, depending on whether the lock is mounted in a left-hand or right-hand door. Since the integral selector assembly is key-operative from the latch body tampering is much more difficult.

Abstract: A lock assembly includes a single switch actuated by a cam for monitoring the position of a main bolt and an auxiliary bolt. The main bolt and the auxiliary bolt engage and move the cam between an actuated position and a released position. In the actuated position the cam actuates a switch. Actuation of the switch indicates that the auxiliary bolt is retracted and that the main bolt is extended into a locked position. The main bolt includes a tail that engages a portion of the cam to drive the cam to the actuated position. The switch will remain in the actuated condition when the auxiliary bolt is retracted and the main bolt is also retracted.

Abstract: A lock mechanism includes a torsion bar that prevents movement of a slide bar abutting a swing bolt. The torsion bar engages the swing bar in a direction transverse to sliding movement to prevent undesired movement away from abutting contact with the swing bolt.

Abstract: A mortise lockset apparatus (10) that includes a retractable bolt (20) movably supported within a case (12). A handle (18) is pivotally supported on a hub (16) supported in the case, the hub being operably connected to the retractable bolt. The bolt is retracted by turning the door handle. A lock-out mechanism (22) is configured to prevent the handle from being turned when the lock-out mechanism is in an engaged position. The handle lock-out mechanism also includes a cam (29) movably supported in the case and operably connected to a motor (30). A sliding stop (34) is movably supported in the case and is engageable with the handle hub to prevent the handle hub and the handle from turning. The sliding stop is also engageable with a cam surface (40) of the cam. The motor is configured to move the sliding stop by rotating the cam. The cam rotational axis (42) is disposed between diametrically opposed portions of the cam surface to minimize space requirements for the assembly.