Improvements in or applicable to Cork-sorews.
Year: 1893

page_text: COM LEID
Improvements in or applicable to Cork-sorews.
I, ANDERS LUDVIG QVARNSTRÖM, of Sundbyborg, noar Stockholm, in the
Kingdom of Sweden, Iron-worker, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
My invention chiefly relates to that kind of cork-screw in which a screw threaded
epindle can be rotated in order that it may be screwed into or out of a cork by
means of a tube fixed to a handle in which tibe the screw spindle can be displaced,
a screw-slot, groove or worm on the tube or on the spindle and having a quick
thread being traversed by a pin on the spindle or the tube as the case may be for
the purpose of compelling the spindle to rotate. The worm of the tube or of the
spindle has an opposite direction to that of the worm on the extreme end of the
spindle constituting the cork screw, and the tube or the spindle can be provided
with one or more worms. When using this kind of cork screw the spindle is pulled
out of the tube and its point is placed against the cork when by pressing the handle
the spindle is pushed into the tube so as to be put into rotation by the latter and
thus screwed into the cork.
The objects of my invention are—
Firstly, to allow of the pressure in the longitudinal direction of the spindle being
greatest when beginning to insert the cork-screw in a cork so as to ensure the cork-
scrow engaging in the cork, the turning force then increasing in proportion as the
cork-screw enters the cork.
Secondly, to enable the cork-screw, after having been screwed in, to be
automatically fixed in the tube so that the cork may be pulled out in the usual
manner without the screw spindle rotating back and coming out of the cork.
Thirdly, to render the cork-sorew as short as possible, so that it may be easily
carried in the pocket.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawing, in which—
Figure 1 is a section of a simple construction of cork-screw embodying my
improvements.
Figure 2 is a similar view illustrating a somewhat modified construction of cork-
screw the parts being extended.
Figure 3 is an elevation of Figure 2 but shewing the parts of the cork-Borew
contracted.
Referring first to Figure 1, A is the screw-threaded spindle, B the tube and C the
handle of the cork-screw. The tube B is provided with a sorow-thread-slot, groove or
worm D in which a pin E fixed to the spindle engages but the slot can instead
evidently be located in the spindle and tho pin fixed to the tube. Further there
may if required in both cases be several of such slots and corresponding pins. In
order that the cork-sorew may be pressed into the cork with considerable force the
pitch of the screw-slot, groove or worm is not the same throughout, that is to say it
is smaller at the outer end of the tube and increases towards the handle. By this
means when pressing the screw with the aid of the handle against the cork, the
pressure in the longitudinal direction of the spindle will be greatest at the beginning
of the screwing in of the cork-screw and at the same time the turning force will be
the least, but in proportion as the sorewing in proceeds, the longitudinal pressure
decreases and the turning force increases. This last mentioned force thus increases
in the same proportion as the resistance increases, whoreby the screwing in is
facilitated. This construction of screw-slot, groove or worm may also be used when

page_text: Dated this Ist any of January 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.