Woodworking – Shaping machine – Heel forming
Patent
1984-09-14
1986-02-04
Bray, W. D.
Woodworking
Shaping machine
Heel forming
144137, 144145A, 144154, 144371, 409179, 33 31, B27C 500
Patent
active
045679274
ABSTRACT:
An apparatus for forming elliptical shapes on a workpiece. The invention involves a support frame which includes a pair of uprights having cantilevered beams from which are suspended a support disk. A pair of mutually perpendicular trammel tracks are set into this support frame. A journaled block is mounted into each trammel track. A trammel beam is rotatably mounted to the two journaled blocks, and a tool attached to the trammel beam, so that as the trammel beam rotates, with the blocks restricted to slide each only in its own track, the tool is required to follow an elliptical path. A ring is caused to revolve about the support frame by a prime mover. Attached to the ring is a bearing block, which slideably holds one end of the trammel beam. Thus as the ring revolves, the beam is caused to automatically and continually rotate, with the tool following its elliptical path. A workpiece holder holds the workpiece stationary in facing relationship in front of the tool, so that the elliptical shape is traced onto the workpiece. The support frame is provided with means to move the cantilevered arms up and down, which in turn causes the tool to move toward and away from the workpiece, thus enabling a variability in the depth of cut if the tool is a cutting tool.
REFERENCES:
patent: 4306598 (1981-12-01), Peof
Bray W. D.
Kees Nicholas A.
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