posted in Asklemmy
Where you live, Combination-Head Screws are widely used?
I wonder why this kind of screws are not more popular? Is it really that much harder to produce them or there is some other reason for not being used everywhere? You can use them either with flathead or Phillips head screwdriver, looks like win-win solution?
It’s juts a way to strip the same screw head twice
Replying to @Ariselas@piefed.ca
rightly so!!! those slippery ass mf-er’s have cut/bruised my hands more times than i care to remember.
Replying to @Ariselas@piefed.ca
Good comment to add some more info here. I wasn’t trying to claim superiority of this screw. As an afterthought I figured that adding that additional cut for flathead screwdriver compatibility, could have been helpful with stripped heads recovery. I’m gonna try to buy some of those canadians screws, looks hard to strip.
those Canadians screws
you mean Robertson, yeah, they are the best.
Replying to @Ariselas@piefed.ca
Robertson’s efficient manufacturing technique using cold forming for the screw’s head is what made the idea a commercial success, so it looks like Canadian popularized it, even though it was patented by US earlier but not commercially manufactured.
Replying to @solbt@feddit.org
P. L. Robertson invented the Robertson screw and screwdriver in 1906 and received the Canadian patent in 1907 (CA103387, U.S. patent CA103387A) and US patent in 1911 (U.S. patent 1,003,657) for a manufacturing machine. The cold forming was a separate patent.
Roberston refused to license to the US and Henry Ford because Ford was being a dick.
