Improvements in Knife Blades.
Year: 1898

page_text: Date of Application, 6th Apr., 1898
PROVIDIONAL DIEVIFICATION
Improvements in Knife Blades.
I, GEORGE BARKER, Fellow of the Chartered Institute of Patent Agents, of
77, Colmore Row, Birmingham, in the County of Warwick, Consulting Engineer,
do hereby declare the nature of the said invention as communicated to me from
abroad by Adolphe Arbenz, of Avenue de Rumine, Lausanne, Switzerland,
Manufacturer, to be as follows:-
-
My invention has for its object improvements in knife blades which are
specially adapted for cutting or removing hard bodies from soft, ones such for
instance as cutting corns, paring potatoes carrots, or other roots or fruit.
In carrying my invention into practice I form my knife blades of any shape
or size one side of which is ground smooth or polished like an ordinary knife
blade and on the other side either on the whole surface or a portion of the sur-
face I cut or form a number of grooves or incisions or roughen the surface like
a file so that the cutting edge of the blade is uneven or serrated like a saw.
In some cases I may roughen parts of the surface of the blade on both sides
that is to say I may form a roughened portion on one side and on the other side
opposite this roughened portion I form the blade smooth so that there may be
one or more roughened portions on both sides in every case a roughened portion
on the one side coming opposite a smooth or polished portion on the other side.
Dated this 5th day of April 1898.
GEORGE BARKER.
Improvements in Knife Blades.
I, GEORGE BARKER, Fellow of the Chartered Institute of Patent Agents, of
77, Colmore Row, Birmingham, in the County of Warwick, Consulting Engineer,
do hereby declare the nature of the said invention as communicated to me from
abroad by Adolphe Arbenz, of Avenue de Rumine, Lausanne, Switzerland,
Manufacturer, and in what manner the same is to be performed to be particu-
larly described and ascertained in and by the following statement:-
My invention has for its object improvements in knife blades which are
specially adapted for cutting or removing hard bodies from soft ones such for
instance as removing corns, paring potatoes, carrots, or other roots or fruit.,
In carrying my invention into practice I form my knife blades of any shape
or size one side of which is ground smooth or polished like an ordinary knife

page_text: blade and on the other side either on the whole surface or a portion of the sur-
face I cut or form a number of grooves or incisions or roughen the surface like
a file so that the cutting edge of the blade is uneven or serrated like a saw.
In some cases I may roughen parts of the surface of the blade on both sides-
that is to say I may form a roughened portion on one side and on the other side
opposite this roughened portion I form the blade smooth so that there may be
one or more roughened portion on both sides in every case a roughened portion
on the one side coming opposite a smooth or polished portion on the other side.
In order that my invention may be more clearly understood and easily carried
into practical effect I have appended hereunto a sheet of drawings upon which
I have illustrated several examples of my knife blade or corn remover.
Figure 1 is a view of a portion of a double edge blade shewing a number of
grooves or incisions cut or formed on a portion of the surface of the lower edge.
Figure 2 is a view shewing the reverse side of the blade as shewn at Figure 1
with grooves or incisions cut or formed on a portion of the surface of the upper
edge.
Figure 3 is a cross sectional view of Figure 1.
I
Figure 4 is a similar view to Figure. I shewing a blade with a number of
grooves or incisions cut or formed at different angles at various intervals along
the surface.
.
Figure 5 shews the reverse side of the blade as shewn at Figure 4.
Figure 6 is a view of a portion of a blade chewing perpendicular incisions
or grooves cut or formed on the surface.
Figure 7 shews the reverse side of the blade as shewn at Figure 6.
Figure 8 is a view of a portion of a blade shewing a number of incisions or
grooves cut or formed on the surface of the blade at different angles crossing
one another.
Figure 9 shews the reverse side of the blade as shewn at Figure 8.
Figures 10 & 11 shewn, the reverse sides of a portion of a blade with perpen-
dicular incisions or grooves cut or formed so as to meet on the one side where
it is plain on the other making a continuous serrated edge.
**
Figure 12 is a view of a portion of a double edged blade shewing the incisions
or grooves cut or formed at different angles on the one side of both edges.
Figure 13 shews the reverse side of the blade as shewn at Figure 12.
Figures 14 & 15 shew the reverse sides of a portion of a blade with perpen-
dicular incisions or grooves cut or formed on the one side and angular incisions
on the other arranged so as to form one continuous serrated edge.
In carrying my invention into practice I form my blades A of any shape or
size required and in the case of a double edge blade as shown at Figures 1, 2,
& 3 the edge a¹ on the one side as shewn at Figure 1 is ground smooth or
polished and the edge a² on the other side is also ground smooth or polished as
shewn at Figure 2 but on a portion of the edge a³ Figure 1 which is the reverse
of the smooth or polished side a Figure 2 I cut or form a number of grooves
or incisions 6 or roughen the surface like a file so that the cutting edge of the
blade is uneven or serrated like a saw. In a like manner a portion of the
edge a Figure 2 which is the reverse of the smooth or polished side a¹ Figure 1
a number of grooves or incisions are cut or formed or the surface roughened 80
that both cutting edges of the blade are uneven or serrated. At, Figures 4 & 5
I have shewn a portion of a blade with the side a¹ (Figure 5) ground smooth or
polished and on the reverse side a³ (Figure 4) I cut or form a number of grooves
or incisions 61 62 and 63 at intervals and at various angles or roughen the surface in
these particular parts like a file so that at intervals the cutting edge of the
blade is uneven or serrated like a saw. Figures 6 and 7 show the serrated or
roughed and the smooth or polished sides respectively of a portion of a blade,
the grooves or incisions 62 being cut or formed perpendicular on a portion of
the blade only Figures 8 and 9 are similar views to Figures 6 and 7 with
the exception that the grooves or incisions are cut or formed so as to cross
5

page_text: one another at different angles. At Figures 10 and 11 I have shewn a portion
of the blade with a continuous serrated or uneven edge which is affected by
cutting or forming the grooves or incisions 62 on both sides exactly opposite and
to correspond with the smooth or polished portions that is to say the grooves or
incisions on the side as shewn at Figure 10 are exactly opposite to and cover the
same space of the blade as the smooth or polished portions shewn at Figure 11
and the grooves or incisions on the side as shewn at Figure 11 are exactly oppo-
site to and cover the same space of the blade as the smooth or polished portion
shewn at Figure 10. Figures 12 and 13 shew a portion of a double edged blade
serrated on both edges very similar to that shewn at Figures 1 and 2 but instead
of forming or cutting the grooves or incisions on opposite sides of the blade I
cut them on the same side and at opposite angles as shewn at Figure 12 the
sides as shewn at Figure 13 being both ground smooth or polished. Figures 14
and 15 shew the reverse sides of a portion of a blade formed with a continuous
serrated edge somewhat similar to that shewn at Figures 10 and 11 but in this
case I cut or form the serrations or grooves at an angle on the one side
(Figure 15) and perpendicular on the other side (Figure 14). In all the
examples shewn the roughed or grooved portion or portions on the one side come
opposite the smooth or polished portion or portions on the other side, but though
I prefer a smooth portion to come opposite a roughed portion, in some cases I
may cut or form grooves or incisions on both sides of the blade so as to make
the cutting edge of the blade uneven or serrated like a saw. Or I may in some
cases form the cutting edge uneven or serrated like a saw and grind or polish the
sides smooth when putting a cutting edge on the teeth.
Blades formed according to my invention are specially adapted for removing
hard bodies or substances from soft bodies such for instance as removing corns
on the feet, hard skin &c. for paring cheese, potatoes, carrots, or other roots or
fruit.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1
CLAIMS.
First: The improvements in knife blades, consisting essentially in forming
or cutting grooves or incisions either along the whole surface or a portion of the
surface or at intervals on one side of the blade, the other side being polished
or ground smooth or a portion of both sides may be roughed and a portion
polished or ground smooth so that the cutting edge of a portion of the cutting
edge of the blade is uneven or serrated like a saw in the manner and for the
purpose substantially as herein set forth and as shewn upon the accompanying
sheet of drawings.
Second: In knife blades which form the subject of the first claim cutting
or forming grooves or incisions on both sides of the blade either along the whole
surface, or at intervals substantially as herein set forth.
Third Forming blades for removing corns or other hard substances on the
feet or for paring cheese potatoes, carrots or other roots or fruit with the cutting
edge uneven or serrated like a saw in the manner substantially as herein set
forth and as shown