Chat with our AI personalities
John Thompson invented the recessed cruciform screw in 1932 and the driver in 1933.
The function of a Philips head screwdriver is to turn Philips head screws.
The Phillips screwdriver was invented in Portland, Oregon in the eary 1930's by Henry F.Phillips.
It can be used to tighten or loosen the screw as well. Flat head screwdriver is hard to turn the screw with quarter inch wide head. The thickness of the slot of the screw and the thickness of the screwdriver should match. The perfect match of thickness enables you tighten it tightly.
an inventor is a designer but a designer is not an inventor
inventor of fiberglass