An Instrument for Clearing out Key Barrels.
Year: 1891

page_text: Date of Application, 9th Feb., 1891
Complete Specification Left, 20th June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
An Instrument for Clearing out Key Barrels.
1, JOHN HENRY MONTAGUE, of 108, New Bond Street, in the County of
London, Surgical Instrument Maker, do hereby declare the nature of this invention
to be as follows:-
This invention relates to an improved instrument for clearing out the dust and
matter which collects in the barrels of keys from the pocket of the person carrying
the same and which accumulation frequently renders a key temporarily useless.
My improved instrument consists of a rod or stem made of suitable material such
as steel one end of the stem being advantageously formed or provided with an
eye by which the instrument can be placed on an ordinary key-ring. The other
end of the stem is bifurcated, the bifurcations being formed into a double-twist-
screw.
By means of this improved instrument it will be obvious that if a key barrel
become choked it will be simply necessary to introduce my instrument into the
barrel and by turning the same the double-twist-screw will pass into and collect
the accumulated matter which can be immediately withdrawn by pulling out the
instrument.
I advantageously provide my instrument with a protecting sheath.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applican
COMPLETE SPECIFICATION.
An Instrument for Clearing out Key Barrels.
I, JOHN HENRY MONTAGUE, of 108, New Bond Street, in the County of
London, Surgical Instrument Maker, 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:-
This invention relates to an improved instrument for clearing out the dust and
matter which collects in the barrels of keys from the pocket of the person
carrying the same and which accumulation frequently renders a key temporarily
useless.
My improved instrument consists of a rod or stem made of suitable material such
as steel, one end of the stem being advantageously formed or provided with a knob
by which the instrument can be manipulated. The other end of the stem is
bifurcated, the bifurcations being formed into a double-twist-screw.
I advantageously provide my instrument with a protecting sheath, provided with
a ring or eye to allow of the instrument being attached to an ordinary key-ring.
In the accompanying drawing,-
Figure 1 is an elevation of my instrument for clearing out key barrels ; and,
Figure 2 is a similar view of the instrument in a protecting sheath or case which
is shewn partially in section.
a is the rod or stem of the instrument made of suitable material such as steel;
b is the knob formed or provided at one end of the rod or stem a, the said knob
being milled to facilitate the manipulation of the instrument; c, care the bifurcations
at the other end of the rod or stem a, such bifurcations being formed into a double-
twist-screw as shewn.

page_text: d (Figure 2) is the protecting sheath or case with which I advantageously pro-
vide my instrument; e is the ring or eye by means of which it can be placed on an
ordinary key-ring.
It will be obvious that, if a key barrel become choked, it will be simply necessary
to introduce my instrument into the barrel and, by turning the same, the double-
twist-screw will pass into and collect the accumulated matter which can be
immediately withdrawn by pulling out the instrument.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. An instrument for clearing out key barrels consisting of a stem or rod, one
end of which is bifurcated, the bifurcations being formed into a double-twist-screw
for the purpose set forth and substantially as hereinbefore described and illustrated
in the accompanying drawing.
2. The combination of an instrument constructed in the manner referred to in
Claim 1 with a protecting sheath or case as hereinbefore described and illustrated
in Figure 2 of the accompanying drawing.
3. The instrument for clearing out key-barrels hereinbefore described and illus-
trated in the accompanying drawing.
Dated the 20th day of June 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.