Gear cutting – milling – or planing – Milling – Randomly manipulated – work supported – or work following device
Patent
1991-10-18
1993-02-02
Briggs, William
Gear cutting, milling, or planing
Milling
Randomly manipulated, work supported, or work following device
33 2703, 144134D, B23C 120, B27C 510, B43L 904
Patent
active
051833735
ABSTRACT:
A template device and method for guiding a marking implement in marking circular lines upon a workpiece and, interchangeably, guides a router in its cutting engagement in following the marked circular lines. Comprising a planar member having paralleled opposed major faces, a guide plate includes a plurality of evenly spaced guide holes between a plurality of unevenly spaced guide holes. All holes are the same diamter, being aligned in the central portion of the guide plate. All holes interchange as pivot, radii marking or cutting guide holes. Bearings with shafts including center holes receive bushing that firmly contain and center a variety of workpiece penetrating and surface adhering pivot anchors and a variety of marking implements. The bearing shafts are insertable, rotatable, and easily removable from any hole within the guide plate. Center holes in bearing shafts also serve to view and center circular lines centerpoints on the workpiece and a preview of a planned circular line, prior to actual marking or cutting. Once the planned line is marked on the workpiece, the marking assembly is removed from the hole in the guide plate and a template guide, as attached to a hand held electric powered router, is reinserted in the guide hole. The guide plate is rotated about the pivot thereby guiding the router in the cutting engagement with the workpiece.
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Downing, Wood Magazine, Feb. 1990, pp. 34-35.
Spielman, Router Jigs and Techniques, 1988, pp. 224-225.
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Briggs William
The Floyd and Gilbert Company
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