Woodworking – Combined machine – Planing and sawing
Patent
1992-08-17
1993-04-13
Bray, W. Donald
Woodworking
Combined machine
Planing and sawing
83365, 83368, 144 3R, 144357, 144369, 356376, 356386, B27C 900, B27B 100
Patent
active
052013510
ABSTRACT:
An edger for use with a conventional sawmill, including upper and lower chippers or cutters for forming the upper and lower edges of a board to be removed from a log, mechanical or optical sizers for automatically determining the location of the upper and lower edges of the board, and a control mechanism, responsive to the sizers, for positioning the cutters. The cutters have horizontal or vertical motors with associated blades, and the motors are mounted on carriages which ride up and down on a mast, positioned by a hydraulic cylinder. Mechanical sizing wheels are mounted on separate carriages, and the wheels are urged to contact the log's surface to determine extreme points of narrowness thereof. The extreme motion points of the sizing wheels are recorded by frictionally secured pistons which are sensed by metallic sensors which are input to the control mechanism. An electric eye causes the sizing wheels to move toward and away from the log. During each forward pass of the log toward the saw, the cutters cut the top and bottom edges off the board that the saw will remove from the log, while the sizers profile the log or locate the minimum width points to be used during the succeeding pass of the log to position the cutters. The single channel or double "H-beam" mast has machined sidewalls to which flanges are attached upon which the carriages slide vertically. Linear slide bearings can also attach the carriages to the mast.
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11 page brochure entitled Recovering Up to 15% More from Each Log--Selcon Selective Electronic Group--Optical Triangulation Probe sold in U.S. under trademark "Selcom Optocator".
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