Martek Limited

Thomas Ketteringham

A tool sharpening device (11) has a rotary grindstone (14), a tool support (34) and linear guides (32, 33) along which the tool support (34) is displaceable in use of the device. The linear guides (32, 33) extend transversely of the axis of rotation of the rotary grindstone (14) and their location is such as to guide a tool carried by the tool support (34) so as to transit across the end face (15) of the rotary grindstone (14). The tool support (34) is releasably connected to the linear guides in such a way that the tool support (34) can be positioned on the linear guides (32, 33) with a tool support face (35) lying at one of two different inclinations to the plane defined by the end face (15) of the grindstone (14).

Multiple purpose tool grinding device

Apparatus for sharpening an edge tool having a linear cutting edge, such as a chisel, plane iron or gouge, comprises a rotary grindstone having a cylindrically curved surface mounted for rotation about an axis coincident with the axis of the cylinder, and tool mounting assembly on which an edge tool to be sharpened can be located, the tool mounting assembly including a guide assembly orientated such that relative movement between the tool and the rotary grindstone can take place substantially perpendicular to the plane including the point of contact between the edge tool and the stone and the axis of the grindstone. The tool mounting assembly includes a tool mount turnable about an axis orthogonal to the plane of a tool carried thereby, which is itself carried on a tool mount carrier turnable about an axis parallel to the axis of the rotary grindstone so that a tool to be sharpened can be positioned with its edge inclined to the axis of the grindstone but lying in a plane parallel to this axis and to the line of relative displacement between the tool mounting assembly and the grindstone.

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Mevagissey, United Kingdom

Thomas Ketteringham