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Hollweg Knife
On October 19, 1886, the Hollweg Brothers of
Barmen, Germany patented a pocket knife
with a corkscrew (German Number 39,829).
In the design there are no finger notches on
the blades. They are moved into position by
lifting rings on the outside of the knife and
turning them. When a blade is fully
extended, it can be locked in place by
lowering the ring.
Carl Hollweg patented the knife in England
on November 10, 1886 (Number 14,560)
under the title
―
Improvements relating to
folding knives, cork-screws, and other
folding articles.
‖
Although the patent does not show a corkscrew, the example in
the photograph has one. When not in use, it is held in place by a pivoting locking
bar behind it on the backside. By sliding the bar to the side, the worm can be
lifted and locked in place by sliding the bar back.