This Wired article also mentions the Canadian Roberts variation. When I was living in Canada, I remember being annoyed at having to buy special screwdrivers for furniture that I bought there. I actually came across a set of Roberts power tool heads that someone had thrown into a gutter. True story.
The Phillips screw and screwdriver were patented this day in 1936.
Courtesy U.S Patent and Trademark Office1936: Henry F. Phillips receives patents for a new kind of screw and the new screwdriver needed to make it work. It changes the worlds of mass production and machine repair, not to mention your home toolbox. (Randy Alfred, Wired)
Other, screw-related blog entries:
Post was last modified on 2 Jul 2020 2:24 pm
A quick Sunday visit to #fortligonier with my history-loving son.
The choreographer daughter is doing a thing.
No interior yet. Getting there. Gotta start somewhere. Low-poly background detail for a medieval theater…
This is manageable. Far better than some semesters.
Creating textures for background buildings in a medieval theater simulation project. I can always improve…