Back to results
US 4,428,408 AGranted
Dovetailing jig
OwnerKenneth M. Grisleyinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerKenneth M. Grisleyinventor
Estimating the term…
A jig used to support and guide a cutting tool has a base frame provided with an elongated support. Mounted on this support is a plurality of guide fingers which collectively serve as a template for the cutting of joint members in boards. The guide fingers are individually secured to the support so that the lateral spacing between the fingers is adjustable. Along one side edge of the support, the overhanging ends of the fingers are shaped to allow the cutting of common joint members. Along the other side edge of the support, the overhanging ends of the fingers are shaped to allow the cutting of complementary joint members. The jig has a clamping arrangement which allows the boards to be clamped to the base frame with the board ends disposed in selected positions relative to the shaped ends of the fingers. By suitable adjustment of the guide fingers, it is possible to provide the board with joint members of varying size and spacing as is sometimes desirable although the fingers can just as readily be arranged to produce joint members of uniform size and regular spacing.
A jig for supporting and guiding a power tool used to cut joint members in workpieces, comprising:
A dovetailing jig for supporting and guiding a power tool fitted with a depending cutter bit comprising;
A dovetailing jig for supporting and guiding a power tool fitted with a depending cutter bit, said jig comprising a base frame having end brackets connected by a longitudinal frame member, said end brackets each having a vertical leg and a horizontal leg, a support extending between the horizontal legs, a plurality of guide fingers arranged in pairs along the support to extend transversely thereof, said pairs of guide fingers each having opposite ends projecting beyond side edges of the support and being shaped to provide guiding surfaces corresponding to complementary joint members, securing means for fastening each guide finger to the support whereby the transverse spacing between each pair of guide fingers and the transverse spacing between adjacent pairs of guide fingers are both selectively variable, and clamping means for securing a workpiece to the base frame in either a first or a second position, said first position disposing a workpiece parallel to the guide fingers and with an end edge thereof adjacent the guiding surfaces along one side edge of the support, said second position disposing a workpiece perpendicular to the guide fingers and with an end edge thereof adjacent the guiding surfaces along an opposite side edge of the support, said guide fingers underlying the power tool as the depending cutter bit is moved between the guiding surfaces to cut joint members in a workpiece in the first position and complementary joint members in a workpiece in the second position.
Dependencies are inferred from the claim text.