US 5,379,669 A · Precision miter gauge

Abstract

A precision miter gauge that consists of a sine-plate assembly mounted on a guide bar for engagement in a conventional table-saw miter slot. The sine-plate assembly comprises a stationary plate substantially perpendicular to the guide bar and a hinged plate pivotally connected to the stationary plate by a hinge pin having an axis of rotation disposed at a predetermined distance from the hinged plate, so as to form a variable angle between the two plates. A gauge block adapted to produce exact predetermined angles is positioned between the stationary plate and a reference pin pivotally coupled to the hinged plate and having an axis of rotation disposed at the same predetermined distance from the hinged plate as the hinge pin's axis. As the gauge block is firmly secured between the reference pin and the stationary plate, the hinged plate provides a solid and precise fence for cutting a workpiece at the selected angle.

Claims18

Dependent claims

A precision miter gauge for positioning a workpiece at a predetermined cutting angle with respect to a blade in a conventional table saw having a miter slot adapted for use with a conventional miter gauge, comprising:

(a) a guide bar adapted for slidable engagement within said miter slot in the table saw;
(b) a mounting plate rotatably connected to the guide bar through pivot means disposed therebetween;
(c) first locking means for releasably fixing the mounting plate to a predetermined angular position with respect to the guide bar;
(d) a stationary plate rigidly attached to said mounting plate;
(e) a hinged plate hingedly connected to said stationary plate by first hinge means and adapted to form a variable angle therebetween from zero degrees to less than 90 degrees, said hinged and stationary plates being disposed in parallel when said angle equals zero;
(f) a plurality of gauge blocks, each having a predetermined thickness along a main axis corresponding to a desired predetermined angle between said stationary and hinged plates;
(g) second hinge means connected to said hinged plate for hingedly fastening any one of said plurality of gauge blocks thereto;
and
(h) second locking means for releasably securing to said stationary plate said any one of said plurality of gauge blocks hingedly connected to said hinged plate, said any one of said plurality of gauge blocks being disposed with its main axis perpendicular to said stationary plate.

6 more elements

(a) a guide bar adapted for slidable engagement within said miter slot in the table saw;
(b) a mounting plate rotatably connected to the guide bar through pivot means disposed therebetween;
(c) first locking means for releasably fixing the mounting plate to a predetermined angular position with respect to the guide bar;
(d) a stationary plate rigidly attached to said mounting plate;
(e) a hinged plate hingedly connected to said stationary plate by first hinge means and adapted to form a variable angle therebetween from zero degrees to less than 90 degrees, said hinged and stationary plates being disposed in parallel when said angle equals zero;
(f) a plurality of gauge blocks, each having a predetermined thickness along a main axis corresponding to a desired predetermined angle between said stationary and hinged plates;
(g) second hinge means connected to said stationary plate for hingedly fastening any one of said plurality of gauge blocks thereto;
and
(h) second locking means for releasably securing to said hinged plate said any one of said plurality of gauge blocks hingedly connected to said stationary plate, said any one of said plurality of gauge blocks being disposed with its main axis perpendicular to said hinged plate.

6 more elements

Dependencies are inferred from the claim text.

Precision miter gauge

Life of this patent

Precision miter gauge

Life of this patent

Abstract

Claims18