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AssigneeIsland Lumber Specialties Ltd.
InventorsHenry James Marshall, Stuart Walter Windblad, William Wagner
Estimating the term…
Control apparatus including first and second hydraulic cylinders hydraulically interconnected in parallel. Cam operated means for reciprocating the piston in the first cylinder, this causing relative movement between the second cylinder and the piston thereof. The second cylinder is connected to a cutter unit of a wood edging machine so that movement of the second cylinder moves the cutter unit. Pneumatic control means is connected to the piston of the second hydraulic cylinder and is operable to cause movement of the second cylinder unaffected by the piston therein. Detecting means is operatively connected to the pneumatic control means. This detecting means is positioned to detect knots in the edges of boards moving in the direction of the cutter unit to cause movement of said unit to avoid the knots.
Apparatus for automatically controlling the cutter unit of a wood edging machine to produce waney edges on boards moving along a feed path and leaving knots at said edges substantially uncut, comprising a main control unit including means connected to a cutter unit of a wood edging machine and normally operable to cause swinging movement of said cutter unit in accordance with a predetermined pattern, said movement enabling the cutter unit to cut into the edges of boards moving along a path in the edging machine past said unit, an overriding control unit including means connected to the main control unit means operable to cause said main control unit means to move the cutter unit in the direction away from boards moving along the path without interfering with the normal operation of the control unit means, and scanning means operatively connected to said overriding control unit means for detecting knots in the edges of boards moving along said path to cause the overriding control unit means to operate and move the cutter unit respectively to avoid said knots.
Apparatus for automatically controlling the cutter unit of a wood edging machine to produce waney edges on boards moving along a feed path and leaving knots at said edges substantially uncut, comprising first and second hydraulic cylinders hydraulically interconnected, said first and second hydraulic cylinders having first and second pistons respectively thereon for movement longitudinally thereof, means for connecting the second hydraulic cylinder to a cutter unit of a wood edging machine to cause movement of said unit, said movement enabling the cutter unit to cut into the edges of boards moving along a path in the edging machine past said unit, main control means connected to the first piston operable to reciprocate said piston in the first cylinder in a predetermined pattern, movement of said first piston causing corresponding relative movement through said hydraulic interconnection between the second piston and the second hydraulic cylinder, pneumatic control means connected to said second piston operable to cause movement of the second cylinder and thereby movement of the cutter unit unaffected by the first piston, and scanning means operatively connected to said pneumatic control means for detecting knots in the edges of the boards moving along said path to cause movement of the cutter unit respectively to avoid said knots.
Apparatus for automatically controlling the cutter unit of a wood edging machine to produce waney edges on boards moving along a feed path and leaving knots at said edges substantially uncut, comprising first and second hydraulic cylinders hydraulically interconnected, said first and second hydraulic cylinders having first and second pistons respectively therein for movement longitudinally thereof, anchoring means connected to said second piston normally preventing movement thereof, means for connecting the second hydraulic cylinder to a cutter unit of a wood edging machine to cause movement of said unit, said movement enabling the cutter unit to cut into the edges of boards moving along a path in the edging machine past said unit, main control means connected to the first piston operable to reciprocate said piston in the first cylinder in a predetermined sequence, movement of said first piston causing relative movement through said hydraulic interconnection between the second piston and the second cylinder, said hydraulic interconnection being such as to permit relative movement between the second piston and the second hydraulic cylinder only when the first piston moves in the first cylinder, pneumatic control means connected to said anchoring means to cause movement thereof and thereby movement of the second hydraulic cylinder and the cutter unit connected thereto unaffected by the first piston, and scanning means operatively connected to said pneumatic control means for detecting knots in the edges of the boards moving along said path to cause movement of the anchoring means and consequently the cutter unit to avoid respectively said knots.
Apparatus for automatically controlling the cutter unit of a wood edging machine to produce waney edges on boards moving along a feed path and leaving knots at said edges substantially uncut, comprising first and second hydraulic cylinders hydraulically interconnected in parallel by fluid lines connected to the opposite ends thereof, said first and second hydraulic cylinder having first and second pistons respectively therein for movement longitudinally thereof, means for connecting the second hydraulic cylinder to a cutter unit of a wood edging machine to cause movement of said unit, said movement enabling the cutter unit to cut into the edges of boards moving along a path in the edging machine past said unit, a rotatably mounted cam having a contoured cam surface, a cam follower against said surface and connected to the first piston, a first pneumatic cylinder having a piston thereon for movement longitudinally thereof, means rigidly connecting the first pneumatic cylinder piston to the first hydraulic cylinder piston, pneumatic means maintaining pressure in the pneumatic cylinder against the piston thereof and thereby against said first hydraulic cylinder piston while permitting movement of the first pneumatic cylinder piston by said first hydraulic cylinder piston, a second pneumatic cylinder having a piston therein for movement longitudinally thereof, means rigidly connecting the second pneumatic cylinder piston to said second piston of the second hydraulic cylinder, said hydraulic interconnection being such as to prevent relative movement between the second hydraulic cylinder and the second piston thereof only when the first hydraulic cylinder piston moves in the first hydraulic cylinder, pneumatic control means movably maintaining pressure in the second pneumatic cylinder to prevent movement of the piston therein thereby normally anchoring said second hydraulic cylinder piston, said pneumatic control means being selectively operable to release said normal pressure and to supply pressure to move the piston in the second pneumatic cylinder thereby moving the second hydraulic cylinder and the cutter unit connected thereto, and scanning means operatively connected to said pneumatic control means for detecting knots in the edges of the boards moving along said path to operate the pneumatic control means to cause movement of the cutter unit to avoid respectively said knots.
Dependencies are inferred from the claim text.