Cabin log shaper

In combination, elongated base means including elongated guide structure, router means supported from said guide structure for guided movement therealong in a predetermined path, support means supported from said base means and definng a reference axis paralling said path, said support means including means for stationarily supporting a log in position generally concentric with said axis, said router means including blade means operative to form a first convex semi-cylindrical surface generally concentric with said axis on a first adjacent side of a log supported along said axis, said support means including means for keying said log in supported position on said support means, when said log angularly is displaced 180.degree. about its longitudinal axis subsequent to forming said semi-cylindrical surface on said log, with the side of said log remote from semi-cylindrical surface opposing said path and said log repositioned on said support means for forming a second semi-cylindrical surface thereon by said router means with said first and second semi-cylindrical surfaces substantially co-extensive, said support means including a plurality of support portions space longitudinally of said base means laterally of said path and adjustably supported from said base means for independent shifting toward and away from said path and also laterally of a plane containing said path and reference axis.

In combination, alongated base means including elongated guide structure, router means supported from said guide structure for guided movement therealong in a predetermined path, support means supported from said base means and defining a reference axis paralleling said path, said support means including means for stationarily supporting a log in position generally concentic with said axis, said router means including blade means operative to form a first convex semi-cylindrical surface generally concentric with said axis on a first adjacent side of a long supported along said axis, said support means including means for keying said log in supported position on said support means, when said log is angularly displaced 180.degree. about its longitudinal axis subsequent to forming said semi-cylindrical surface on said log, with said log repositioned on said support means for forming a second semi-cylindrical surface thereon by said router means and with said first and second semi-cylindrical surface substantially co-extensive, said router means including a rotary cutting head journaled for rotation about an axis transverse to said path and substantially normal to a plane containing said path and said reference axis, said head including circumferentially spaced blades disposed in radial planes of the axis of rotation of said head, the outer ends of said blades including semi-cylindrical outwardly opening edges disposed in said radial planes and terminating outwardly at their opposite ends in oppositely outwardly directed edges, said blade including central outwardly projecting lug-types blade elements carried by the central portion of said semi-cylindrical cutting edges for forming a central outwardly opening keyway groove in each of said semi-cylindrical surfaces.