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US 4,306,598 AGranted
Ellipse cutting machine
AssigneeThe Singer Company
InventorDavid G. Peot
Life of this patent
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AssigneeThe Singer Company
InventorDavid G. Peot
Estimating the term…
A trammel beam carrying a pair of dove-tail shaped slider blocks rotatably carried on a pair of adjustable trammel points is attached to a workpiece support base which includes a pair of crossed right angle mutually perpendicular dove-tail tracks along which the slider blocks move as the trammel beam or workpiece support base are rotated relative one another. The trammel beam is provided with means permitting it to be mounted to a router or other cutting machine so that if the workpiece support base is attached to the surface of a workpiece, relative movement between the cutting machine and the workpiece will be restricted to an elliptical path as the movement is guided by the trammel. The means provided for mounting the trammel beam to the cutting machine permit either direct mounting of a machine such as a portable router for movement of the router around the workpiece or adjustably to a router table with the workpiece inverted between the trammel beam and the router table so that as the workpiece is rotated relative the trammel beam the workpiece will move along an elliptical path past the router cutter.
Ellipse cutting machine comprising a trammel beam carrying a pair of slider blocks rotatably carried on a pair of adjustable trammel points attached to a workpiece support base which includes a pair of crossed right angle mutually perpendicular tracks along which said slider blocks move as said trammel beam or said workpiece support base are rotated relative one another, said trammel beam being provided with means for permitting it to be mounted to a cutting machine such as a router so that when said workpiece support base is attached to the surface of a workpiece, relative movement between the cutting machine and the workpiece will be restricted to an elliptical path as the movement is guided by said trammel beam wherein said means provided for mounting said trammel beam to the cutting machine permit alternatively both direct mounting of such cutting machine for movement of said machine around the workpiece and adjustable mounting thereof to a router table with the workpiece inverted between the trammel beam and the router table so that as the workpiece is rotated relative said trammel beam the workpiece will move along an elliptical path past the router cutter.
Router attachment for cutting elliptical grooves in a workpiece comprising, in combination,
Dependencies are inferred from the claim text.