| 主权项 |
1. A drill guide and layout tool comprising:
a block member; two spaced-apart V-jigs projecting from the block member, wherein each V-jig has a V-shaped opening defined by two angled apart V-sides and having two V-tips, one V-tip at the distal end of each V-side, and the V-shaped openings are aligned such that together the V-shaped openings define a V-jig axis passing through the bottom of each V-shaped opening; and a center drill guide hole through the block member at a location centered between the V-jigs and aligned with the V-jig axis; wherein, the tool may be used to guide a drill by: in the case of longitudinally extending material of an appropriate size and configuration, placing the tool against the material with the V-jig axis aligned with the longitudinal axis of the material; or in the case of longitudinally extending material having a profile that does not permit aligned insertion within the V-shaped openings or a non-longitudinally extending material having a complex curved surface, bringing the four V-tips into contact with the material wherein the block member further comprises a scribing array for use with a pencil or other scribing tool in scribing regular curves, the scribing array comprising:
at least a first anchor hole through the block member and configured for insertion of a fastener therethrough;the center drill guide hole, wherein the center guide hole is configured for supporting a scribing tool; anda plurality of scribe holes through the block member and configured for supporting a scribing tool, and along with the center drill guide hole, spaced apart in first increments from the first anchor hole; whereby a user may scribe a regular curve of a desired first set of radii by inserting a fastener through the first anchor hole at the center of the curve and inserting a scribing tool into the one of the scribe holes and center drill guide hole providing the desired radius from the first set of radii; and wherein a loop of string may be secured to the block member for use in suspending the block member as a plumb bob, in that the block member further comprises a plumb slot intersecting the first anchor hole, whereby a loop of string may be inserted into the plumb slot and secured therein by inserting a fastener into the first anchor hole through the loop of string. |
