초록 ▼

A reticle incorporates an optical center and a plurality of measuring points. The measuring points are formed by a primary vertical line, a primary horizontal line intersecting the primary vertical line at the optical center, a plurality of dots intersecting the primary lines and evenly spaced at a

A reticle incorporates an optical center and a plurality of measuring points. The measuring points are formed by a primary vertical line, a primary horizontal line intersecting the primary vertical line at the optical center, a plurality of dots intersecting the primary lines and evenly spaced at a predetermined distance along the primary lines, a plurality of secondary lines intersecting one of the primary lines and evenly spaced between the dots therein. The secondary lines are shorter than 0.2 mil. Alternatively, the reticle further incorporates at least one post on at least one end of the primary lines with post hash marks thereon. Each the intersecting lines forms one of the plurality of measuring points.

대표청구항 ▼

A reticle incorporates an optical center and a plurality of measuring points. The measuring points are formed by a primary vertical line, a primary horizontal line intersecting the primary vertical line at the optical center, a plurality of dots intersecting the primary lines and evenly spaced at a

A reticle incorporates an optical center and a plurality of measuring points. The measuring points are formed by a primary vertical line, a primary horizontal line intersecting the primary vertical line at the optical center, a plurality of dots intersecting the primary lines and evenly spaced at a predetermined distance along the primary lines, a plurality of secondary lines intersecting one of the primary lines and evenly spaced between the dots therein. The secondary lines are shorter than 0.2 mil. Alternatively, the reticle further incorporates at least one post on at least one end of the primary lines with post hash marks thereon. Each the intersecting lines forms one of the plurality of measuring points. e wear member except in a release direction, a concave abutting surface curved across substantially the entire abutting surface to abut the front bearing surface, an opening having a bearing wall, and a forwardly projecting working portion, wherein the front bearing surface and the abutting surface are each curved in two perpendicular directions; and a lock received into the opening to oppose the rear bearing surface and the bearing wall of the opening to prevent release of the coupling configurations in the release direction and thereby hold the wear member to the base. 2. An assembly in accordance with claim 1 in which the front bearing surface and the abutting surface are each mutually curved at substantially the same radius of curvature.3. An assembly in accordance with claim 1 in which the lock includes a contact surface in engagement with the rear bearing surface, and the contact surface and the rear bearing surface are each curved.4. An assembly in accordance with claim 3 in which the contact surface and the rear bearing surface have substantially the same radius of curvature.5. An assembly in accordance with claim 1 in which one of the first and second coupling configurations is a tongue with at least one lateral shoulder and the other one of the first and second coupling configurations is a slot to matingly receiving the tongue.6. An assembly in accordance with claim 5 in which the first coupling configuration is a T-shaped tongue and the second coupling configuration is a T-shaped slot.7. An assembly in accordance with claim 1 in which the first coupling configuration is a tongue and the second coupling configuration is a slot.8. An assembly in accordance with claim 1 in which the lock includes a first contact surface that opposes the bearing wall and a second contact surface that opposes the rear bearing surface, wherein the lock further includes an actuator that selectively moves the first and second contact surfaces away from each other to tighten the engagement of the wear member on the base.9. An assembly in accordance with claim 8 in which the second contact surface and the rear bearing surface are each curved.10. An assembly in accordance with claim 1 wherein the base is cast as a unitary portion with an arm of a dredge cutterhead.11. An assembly for mounting a wear member to excavating equipment comprising: a base adapted to be fixed to a digging portion of an excavator, the base including a first coupling configuration, a front bearing surface, and a rear bearing surface; a wear member including a second coupling configuration that fits with the first coupling configuration to prevent release of the wear member except in a release direction, an abutting surface to abut the front bearing surface, an opening having a bearing wall, and a forwardly projecting working portion; and a lock received into the opening to oppose the rear bearing surface and the bearing wall of the opening to prevent release of the coupling configurations in the release direction and thereby hold the wear member to the base, the lock including an actuator and a resilient member, wherein when the lock is in the opening the actuator is operable to draw the wear member on the base into a tighter fit and to compresses the resilient member, and wherein the resilient member expands the lock to tighten the engagement of the wear member on the base as wear develops in the assembly. 12. An assembly in accordance with claim 11 in which the lock includes a first contact surface that opposes the bearing wall and a second contact surface that opposes the rear bearing surface, wherein the lock further includes an actuator that selectively moves the first and second contact surfaces away from each other to tighten the engagement of the wear member on the base.13. An assembly in accordance with claim 12 in which the actuator includes a screw, the free end of which defines one of the first and second contact surfaces.14. An assembly in acco