Ornamental turning device

A tool drive means comprising:

• a driven cog driveably connected to a driving cog;
• at least one cam rotatable with the driven cog, which cam comprises a plurality of lobes;
• a moveable cam follower adapted to follow the surface of the at least one cam;
• and
• a flexible cable for connecting a tool to the cam follower, said tool including a reciprocating blade, whereby reciprocation of the blade is determined by movement of the cam follower over the cam surface and whereby in use, the rate at which the blade reciprocates is proportional to the rotation speed of the shaft, and whereby when the cam follower tracks a lobe surface of the cam, the tool is in contact with an object to be worked, and when the cam follower tracks a non-lobe surface, the tool is out of contact with the object.

A cutting tool comprising:

• a housing having a front open end and a back open end;
• a cutting blade movably positioned within the housing and having a cutting position in which the blade protrudes through the front end of the housing, and a noncutting position in which the blade retracts a distance within the housing;
• means for connecting the tool to a drive means;
• means for biasing the tool in the cutting position.

An ornamental turning device comprising:

• a shaft adapted to receive a chuck at a first end and being rotatable about an axis of rotation;
• a tool for engraving an object attachable to the chuck and comprising a reciprocating blade;
• a driving cog connected to the shaft;
• and
• tool drive means driveably connected to the shaft of the driving the tool, the drive means comprising:
• a driven cog driveably connected to the driving cog;
• a plurality of cams, each rotatable with the driven cog and each comprising a plurality of lobes;
• a moveable cam follower adapted to follow the surface of any one of the plurality of cams;
• and
• means for connecting the tool to the cam follower, whereby reciprocation of the blade is determined by the movement of the cam follower over the cam surface and whereby in use, the rate at which the blade reciprocates is proportional to the rotational speed of the shaft, and whereby when the cam follower tracks a lobe surface of the cam, the tool is in contact with an object to be worked, and when the cam follower tracks a non-lobe surface, the tool is out of contact with the object.