Cabin log shaper

Claim 2

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 defining a reference axis paralleling 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 and to form a central outwardly opening keyway groove in said surface extending therealong, said support means including key means receivable in said keyway groove, when said log is angularly displaced 180 degrees about its longitudinal axis subsequent to forming said first semi-cylindrical surface and keyway groove on and in said log, to support said log in keyed position from said support means with the side of said log remote from the first grooved semi-cylindrical surface opposing said path and said log positioned for forming a second grooved semicylindrical surface thereon by said router means with said first and second semi-cylindrical surfaces substantially coextensive and said keyway grooves substantially diametrically opposite each other.

Claim 3

The combination of claim 1 wherein said router means includes 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 refernece axis.

Claim 4

The combination of claim 1 including drive means for driving said router means back and forth along said guide structure.

Claim 5

The combination of claim 3 wherein said drive means includes a manually operable rotatable input shaft.

Claim 6

The combination of claim 1 wherein said router means includes a shroud having inlet and dischaarge ends and defines a blower located within the inlet end of said shroud for effecting rapid air flow through said shroudh to be exhausted from the discharge end thereof.

Claim 7

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° 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.

Claim 8

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° 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.

Claim 9

The combination of claim 6 wherein said support means and said base means include means for selective support of one of said support portions in selected positions spaced along said base means.

Claim 10

The combination of claim 6 wherein said support portions are laterally spaced from said path below the latter and define upwardly opening partial cylindrical cradles for cradling the oppsite ends of said log.

Claim 11

A router head for transforming a large diameter tree log into a smaller diameter cylindrical cabin log, said router head including means for rotatably journaling said head about a center axis defined thereby, circumferentially spaced blades carried by said head and disposed in radial planes of said center axis, the outer ends of said blades including semi-cylindrical outwardly opening edges disposed in said radial planes terminating outwardly in oppositely outwardly directed edges, said blades including central outwardly projecting lug-type blade elements carried by the central portions of said semi-cylindrical cutting edges.

Claim 12

A router head for transforming a large diameter tree log into a smaller diameter cylindrical cabin log, said router head including means for rotatably journaling said head about a center axis defined thereby, circumferentially spaced blades carried by said head and disposed in radial planes of said center axis, the outer ends of said blades including semi-cylindrical outwardly opening edges disposed in said radial planes terminating outwardly in oppositely outwardly directed edges, said blades including central outwardly projecting lug-type blade elements carried by the central portions of said semi-cylindrical cutting edges.

Claim 13

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° 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.

Claim 14

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° 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.