Dear ade3ada-ga;
Thank you for allowing me an opportunity to answer your interesting question.
?Henry F. Phillips, of Portland, OR, invented the X-shaped socket head
screw for car makers who needed a screw that could be driven with more
torque and that would hold more tightly than slotted screws. Car
makers also needed a screw that would center quickly and easily, and
could be used efficiently on an assembly line.
The invention was initially rejected, but eventually accepted by the
American Screw Co., who in 1936 persuaded General Motors to use the
Phillips head screw in manufacturing Cadillacs.
Phillips lost the patent to his eponymous invention in 1949?
TEACHERVISION.COM
http://www.teachervision.fen.com/askeds/10-20-01askeds.html
?Cross-head, or Phillips screw has a "+"-shaped slot and is driven by
a cross-head screwdriver, designed originally for use with mechanical
screwing machines. The Phillips screw drive has slightly rounded
corners in the tool recess, and was designed so the driver will slip
out, or cam out, under strain to prevent over-tightening. The Phillips
Screw Company was founded in Oregon in 1933 by Henry Phillips, who
bought the design from J. P. Thompson. Phillips was unable to
manufacture the design, so he passed the patent to the American Screw
Company, who were the first to manufacture it.?
WIKIPEDIA
http://en.wikipedia.org/wiki/Screw
The Phillips head was named after its owner, Henry F Phillips, though
the inventor was actually J P Thompson. It?s a simple as that. I
suppose it probably came very close to being forever memorialized as
the ?Thompson head?. That seems a weird possibility to consider
doesn?t it? Actually, not really, because what most people don?t
realize is that there is also a Robertson head (it has a square hole
and is driven by a special power-tool bit or screwdriver, and not
nearly as popular).
Robertson? Yeah, I know?don?t ask.
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Tutuzdad ? Google Answers Researcher
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Phillips screwdriver
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