Woodworking – Tenoning machine – Rotary gaining cutter
Reexamination Certificate
2003-02-26
2004-10-05
Ostrager, Allen (Department: 3725)
Woodworking
Tenoning machine
Rotary gaining cutter
C144S198100, C144S085000, C144S134100
Reexamination Certificate
active
06799615
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to tenon cutters and more specifically it relates to a tenon maker for making a cylindrical-shaped tenon on a wood end utilizing the power of a router.
2. Description of the Prior Art
Five thousand years ago, the throne of Egyptian king Tutankhamen was assembled using mortise-and-tenon joints pinned in place with dowels. Ancient Greek shipwrights assembled hulls by drilling holes and cutting mortises in abutting planks, inserting a drilled plate in the mortises, and driving a dowel home through slightly offset holes to draw the planks tight. The draw-tenon, as this joint is known, is now used only by a small group of traditional artisans, mainly in post-and-beam timber-framing and in the reproduction of historical furniture.
While it can be appreciated that tenon cutters have been in use for years, typically modern tenon cutters are comprised of power tenon cutters, woofer tenon machines, Tenonizer, and router jigs.
Some components of the draw-jointing process have been mechanized. Mortise-and-tenon joints, for example, were originally cut entirely by hand.
Prior art U.S. Pat. No. 224,752, issued Feb. 17, 1880 to White, provides a machine for producing tenons of elliptical or other variable forms. The tenoning machine includes cutters to which variable motions are imparted by means of a sliding rod operating at a right angle to the line of the sliding motions of the cutter-heads. The tenoning machine also comprises a connected cam and a key, by which movements of the cutter-heads are controlled and the cutters caused to advance and recede to and from the piece of wood or bolt to be tenoned.
Prior art U.S. Pat No. 737,450, issued Aug. 25, 1903 to McNaul, shows a tenoning machine for making tenons in one or both ends of timber adapted for use in shoring mines and for other purposes. The machine embodies a carriage adapted to automatically load itself with a log and equipped with a dog which at one end of the machine is operated automatically to clamp the log, while at the other end of the machine the dog is released in like manner and prior to the discharge of the finished log from the machine. As the loaded carriage moves through the machine the log is presented to a gang of four saws, which operate in two directions to remove slabs from the ends of the log, after which the carriage is rocked or turned in a way to give a quarter turn to the log. The continued movement of the carriage presents the log to a second gang of saws, which operate on the partially finished log to remove the other pieces or slabs therefrom and to complete the tenons on the ends of the log. The carriage is now reversed or restored to its initial position, and as it approaches the delivery end of the machine the dog is retracted and finally the log, with completely formed tenons on its ends, is discharged automatically.
Prior art U.S. Pat. No. 1,844,057, issued Feb. 9, 1932 to Buchan, claims a tenoning machine from which tenons may be quickly and accurately cut on the ends of large timbers such as are commonly employed in the building of cribs, docks and framing.
Prior art U.S. Pat. No. 2,167,082, issued Jul. 25, 1939 to Morris, describes a tenon cutting device that may be applied to a work bench. The device provides means by which a board or the like may be held and an end thereof cut to form a tenon which may be a straight tongue or of dovetail formation.
Prior art U.S. Pat. No. 2,715,924, issued Aug. 23, 1955 to Norris, discloses a manually controlled device for turning integral dowels. The device is adapted for use in connection with a table-type circular saw unit, for turning an integral dowel on the end of a wooden work piece, as for example, on the end of a chair leg or chair rung.
Prior art U.S. Pat. No. 4,593,735, issued Jun. 10, 1986 to Wirth, Jr., indicates an apparatus for woodworking which functions include boring, mortising, tenoning, forming dovetails, duplicating a three dimensional object, and the like. The invention embodies means for providing movement of a workpiece in a horizontal plane or X-Y direction, and means for providing vertical cutting tool movement.
Prior art U.S. Pat. No. 5,494,089, issued Feb. 27, 1996 to Lubbe, puts forth a mortise and tenon jig for a router device that includes a base structure; and a mounting member joined to the base structure, being attachable to a support structure such as a table. The invention further includes first spaced apart parallel elongated guiding members; second spaced apart parallel elongated guiding members; a router support member for operatively supporting a router device; first sliding members attached to the second guiding members for slidingly supporting these relative to the first guiding members; and second sliding members slidingly mounted on the second guiding members. An attachment member is provided for attaching the router support member to the second sliding members. Clamping plates are slidably joined to the base structure. Stop means for limiting movement of the first and second sliding members are provided. Finally a tenon template support member is connected to the second sliding members; and a template guide member for moving along a tenon profile template is joined to the template support member.
Prior art U.S. Pat. No. 5,123,463, issued Jun. 23, 1992 to Grisley, concerns a jig for guiding a power tool that has a cutter bit to cut joint members in workpieces. The jig includes a base frame having a tool support surface and a workpiece support surface. A pair of guide arms are releasably attachable to the power tool. A track is formed on the tool support surface adapted to slidably receive one of the guide arms. A template is releasably securable to the tool support surface having guide surfaces engagable by the other of the guide arms. The track and template co-operate to guide movement of the power tool atop the tool support surface. A clamping system is provided for securing workpieces to the workpiece support surface in a position to be cut by the power tool slidably supported on the tool support surface and guided by the track and the template to provide a joint member in one workpiece and a complementary joint member in another workpiece.
Prior art U.S. Pat. No. 5,025,841, issued Jun. 25, 1991 to Totten, illustrates a table that includes a support member having a work surface with an opening extending through the support member and the work surface. A first mechanism for mounting a router with the support member is provided. A router bit extends generally vertically through the opening and beyond the work surface. A second mechanism for mounting the router with the support member is provided so that the router bit extends generally parallel with the work surface. A mechanism for adjusting the dimension between the router bit and the work surface when the router is mounted with the second mechanism is also provided. The support member has a recess for receiving at least a portion of the router bit below the level of the work surface when the router is mounted with the second mechanism.
Prior art U.S. Pat. No. 4,741,370, issued May 3, 1988 to Heaton, is for a woodworking apparatus that comprises a support table having a flat, circular table surface. The apparatus also includes a first power driven cutting tool mounted below the table surface having a spindle adapted to project upwardly through an orifice in the center of the table surface, and a second power driven cutting tool mounted off-center from the first cutting tool below the table surface and having a spindle adapted to project upwardly through an orifice in the table surface. A guide fence is mounted above said table surface on a chord thereof, means for adjusting said guide fence relative to said cutting tools radially of the circular table surface between a position substantially central of the table surface diametral thereof to a retracted chordal position; and means for adjusting said guide fence angularly about the table surface, whereby the effective distanc
Meeker Donald W.
Ostrager Allen
Self Shelly
LandOfFree
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