Machine for cutting logs to form log joints
AssigneeTrue North Log Home Machinery Inc.
InventorRonald A. Wrightman
Life of this patent
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Abstract
A machine for cutting logs to provide a dovetail log joint is provided with a number of saw legs which are slidably mounted on carriages, some of which are movable in order to adjust the angle of inclination of the saw blades. This machine permits dovetail tenons to be formed at either end of a log to provide both inside and outside corner joints. All of the necessary cuts can be effected while the log is held in a fixed position, it is only necessary to move the log longitudinally of itself in order to form the tenons at opposite ends. C-clamps are also provided for applying pressure to the log joint during assembly of the joint.
Claims10
A machine for cutting logs to provide a predetermined log joint configuration at one end thereof comprising;
- (a) means for supporting a log in a logging station with its longitudinal extent extending in a first direction and one end face thereof extending in a datum plane which extends normal to the first direction,
- (b) first saw mounting means for mounting first saw means for movement through the cutting station along a first cutting path which extends transversely of said first direction,
- (c) second saw mounting means for mounting second saw means for movement through the cutting station along a second path which converges with and intersects at first cutting path on one side of the cutting station,
- (d) pivot means pivotally supporting said first mounting means for movement between first position in which it supports the first saw movement in said first path and a second position in which the first support means is remote from said second path to provide clearance for the movement of the second saw as it travels along said first path in use.
A machine for cutting logs to form a dovetail tenon at at least one end thereof, each log having a pair of oppositely disposed end faces, an upper face, a lower face and first and second side faces extending longitudinally between said end faces, comprising;
- (a) a main face having a log cutting station located therein,
- (b) log guide means extending into said cutting station along a loading path which extends in a first plane,
- (c) stop means in said first path for arresting the movement of a log along said first path to locate one of said end faces of the log in a first datum plane,
- (d) a first saw guide means mounted in said main frame and located above said log guide means,
- (e) a first saw carriage slidably mounted on said first saw guide means for movement therealong in a second direction which extends transversely of the first direction,
- (f) a first saw mounted on said first carriage, said first saw having a first saw blade mounted for rotation thereon in a first sawing plane which extends parallel to said second direction,
- (g) first drive means for driving said first saw carriage to and fro along said first saw guide means between a first position and a second position such that movement from the first position to the second position will cause the saw blade to form a first cut in an end face of a log which is located at a sawing position with its end face position in said first datum plane in use,
- (h) a second saw carriage slidably mounted on said first saw guide means for movement therealong in said second direction,
- (i) a second saw mounted on said second carriage, said second saw having a second saw blade mounted for rotation thereon in a second sawing plane which extends perpendicular to said first sawing plane,
- (j) second drive means for driving said second saw carriage to and fro along said first saw guide means between a first position and a second position such that movement from the first position to the second position will cause the second saw blade to form a second cut in a second face of a log which is located in said sawing position, said second cut extending to the first cut to form one face of a tenon,
- (k) a second saw guide means mounted in said main frame and located below said log guide means,
- (l) a third saw carriage slidably mounted on said second saw guide means for movement therealong in a third direction which extends transversely of the first direction,
- (m) a third saw mounted on said carriage, said third saw having a third saw blade mounted for rotation thereon in a third sawing plane which extends parallel to said third direction,
- (n) a fourth saw mounted on said third carriage, said fourth saw having a fourth saw blade mounted for rotation thereon in a second sawing plane,
- (o) third drive means for driving said third saw carriage to and fro along said second saw guide means between a first position and a second position such that movement from the first position to the second position will cause said third saw blade to form a third cut in an end face of a log and the fourth blade to form a fourth cut in the other side face of a log which is located a sawing position with its end face positioned in said first datum plane in use.
Dependencies are inferred from the claim text.