more on the Robertson screw . .

Jim Kinnear jim@pianoguy.com
Fri, 6 Feb 2004 12:13:32 -0500


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The legend goes like this: Sometime around  the turn of the century,=20
Peter Lymburner Robertson was setting up a street booth from which=20
he planned to sell tools, when the  slot-headed screwdriver he was=20
using slipped out of the screw head and slashed open his hand.=20
"There must be a better way," he mumbled to himself before vowing=20
then and there, the story goes, to create the ultimate driver. P. L.=20
Robertson did  indeed patent his square-headed driver and screw=20
system in 1908.

And not long after, the Fisher Body Company (famous for constructing=20
the Ford Model T) decided to use his invention in its production=20
line.

Robertson's colour-coded screwdrivers ( yellow, green, red and black =
from=20
smallest to largest) -and square-headed screws have grown to dominate=20
the Canadian fastening market: Fully 85% of the screws sold in=20
Canada use the Robertson head.

About 10% of the screws sold in the U.S. are Robertson and This Old=20
House and New  Yankee Workshop guru Norm Abram suggests they could=20
dominate  the industry in 15 years.


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