>Robertson had licensed the screw design to a maker in England, but the party that he was dealing with intentionally drove the licensee company into bankruptcy and purchased the rights at a reduced price from the trustee, thus circumventing the original agreement. Robertson spent a small fortune buying back the rights, and subsequently refused to allow anyone else to make the screws under license. When Henry Ford tried out the Robertson screws, he found that they saved considerable time in Model T production, but when Robertson refused to license the screw design, Ford realized that the supply of screws would not be guaranteed and chose to limit their use in production to Ford's Canadian division. Robertson's refusal to license his screws prevented their widespread adoption in the United States, where the more widely-licensed Phillips head gained wider acceptance. The restriction of licensing of Robertson's internal-wrenching square may have sped the development of the internal-wrenching hexagon, although documentation of this is limited.
https://en.wikipedia.org/wiki/List_of_screw_drives#Robertson_.28square.29
Thank them for not letting the world use superior screw drives.
>>61892316
>literally a square inside a circle
How can shit like that be even licensed
>>61892316
> got backstabbed
> spend a small fortune
> never trust people ever again
>>61893080
welcome to capitalism with big gov
>>61893080
>American education
Why can't everything with screws just use the same kind of design in different sizes? Alan type on everything would be amazing in my opinion.
>>61893223
Differing requirements i think. Allen wrenches are nice but you can't use hexes larger than the screw itself (unlike Phillips head screws). Also they're easier to strip compared to torx ones