antiques

Pristine 1838 “Rose Engine” Lathe

Pristine 1838 “Rose Engine” Lathe

A rose engine is a type of geometric lathe used to produce complex radial engravings called Guilloché, which are used both for decorative and security (i.e. anticounterfeiting) purposes. Those of you with more than $238,000 of disposable cash lying around may be irked to discover that the auction for this stunningly beautiful antique specimen is long closed. At least we can all still enjoy the gorgeous photographs…

Tool Tales: The Pump Drill

Tool Tales: The Pump Drill

A pump drill is an ancient tool traditionally been used to generate friction heat for starting fires, as well as for boring holes. The principle of a pump drill’s operation is similar to the button spinner or whirligig, in which rotational momentum is built and maintained by repeated twisting and untwisting of a cord. After reading about them in a book about primitive technology, I got interested in the idea of a “modern” pump drill, operating on the same principle as the ancient tool but manufactured from industrial-age materials instead of wood, stone, and bone.