Who Invented the Square Head?
Inventor Peter Lymburner Robertson Came up with the Idea in 1908 After Cutting His Hand with a Slotted Screwdriver. the Head Features a Slightly Tapered Square...
Inventor Peter Lymburner Robertson came up with the idea in 1908 after cutting his hand with a slotted screwdriver. The head features a slightly tapered square socket making it self-centering, easier to drive one-handed, and slip-resistant.
Who invented the Robertson bit?
The solution was found by a 27-year old Canadian, Peter L. Robertson. He was a pitchman for a Philadelphia tool company, a traveling salesman who sold goods at trade fairs and on street corners throughout eastern Canada.
Who was PL Robertson?
Peter Lymburner Robertson – also known as P.L. Robertson – was a Canadian business mogul, author and inventor. He popularized the square-socket version of the screw and the corresponding screwdriver in the early 1900s. His products are still named after him today.
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
