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| The original intent of dominating fastener manufacture
became sidetracked by the offering of a different type
of screwdriver branded with the Robertson name. The answer was to invent a new type of screw. Papers requesting
a patent were filed on October 18, 1930, and that patent
(#1,910,182) was granted on May 23, 1933. The new fastener
was called "the slotted socket screw". It is
questionable whether this screw was ever manufactured. |
| The
screwdriver shown here is conspicuously marked with
a patent date of 1930, along with the full name,
"ROBERTSON COMBINATION SOCKET AND SLOT SCREW
DRIVER" (note the name reversal) along with,
"PAT. - 1930", "P.L. Robertson Mfg.
Co. Limited" and "Milton Ont.". It
has the traditional red-colored wooden handle associated
with the early Robertson-manufactured screwdrivers.
The reversible tool bits are of the socket type
on one end, and the slot type on |
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the other end. They represent three common Robertson sizes
and three sizes of slot. They are an even straw color,
indicating that they have been hardened and drawn to a
good workable temper.
Psst…can you pass me that green-handled screwdriver?
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