Improvements in Machine Chaff Knives, likewise Applicable to Turnip Cutters and other Machine Knives.
Year: 1889

page_text: Date of Application, 12th Aug., 1889
Complete Specification Left, 12th May, 1890-Accepted, 14th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Machine Chaff Knives, likewise Applicable to
Turnip Cutters and other Machine Knives.
We, MATTHEW FURNESS of 19 Churchill Terrace, Chorlton on Medlock, Manchester,
in the County Palatine of Lancaster, Commission Agent, and JOHN PETER FORNESS
of Farmer Works, Bradway, in the County of Derby, Scythe and Machine Knife
Manufacturer, do hereby declare the nature of our Invention for "IMPROVEMENTS IN
MACHINE CHAFF KNIVES LIKEWISE APPLICABLE TO TURNIP CUTTERS AND OTHER
MACHINE KNIVES," to be as follows :-
The object of our Invention is to economise material in the manufacture of Machine
Chaff Knives, Turnip Cutters or other Machine Knives or Blades.
We effect this by employing thinner material in the formation of such knives,
cutters or blades and strengthening or stiffening the same by forming a rib or ribs, or
by forming a rib and groove or ribs and grooves or by forming an indent or indents
or series of indentations, by casting, forging, stamping, pressing, embossing, rolling or
otherwise manipulating the knives, cutters, or blades, or the material of which they
are constructed.
We arrange and distribute the ribs, grooves or indentations herein referred to in a
variety of ways as for example in a Machine Chaff Knife, we sometimes form them
longitudinally or parallel to the cutting edge of the blade or longitudinally in
continuous or intermittent wave lines or radially towards the cutting edge, or in some
cases a combination of the foregoing arrangement and distribution of the ribs, grooves
or indentations is adopted.
In some cases the ribs grooves or indentations may be made on one or both sides
but as it is more convenient to have one side of the knife with a flat surface for
grinding, we should by preference form the ribs or projections formed by the indenta-
tions so that they come to the back of the knive, cutter, or blade leaving the reverse
side plain for grinding the grooves and indentations formed on the grinding side not
interfering with the operation of grinding.
Dated this 10th day of August 1889.
R. HEBER RADFORD,
Agent for the Applicants."
COMPLETE SPECIFICATION.
Improvements in Machine Chaff Knives, likewise Applicable to
Turnip Cutters and other Machine Knives.
We, MATTHEW FURNESS of 19 Churchhill Terrace, Chorlton-on-Medlock, Manchester,
in the County Palatine of Lancaster, Commission Agent, and JOHN PETER FURNESS,
of Farmer Works, Bradway, in the County of Derby, Scythe and Machine Knife
Manufacturer, do hereby declare the nature of our Invention for "IMPROVEMENTS IN
MACHINE CHAFF KNIVES LIKEWISE APPLICABLE TO TURNIP CUTTERS AND OTHER
MACHINE KNIVES," and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :—
The object of our Invention is to economise material in the manufacture of Machine
Chaff Knives, Turnip Cutters or other Machine Knives or Blades.
We effect this by employing thinner material in the formation of such knives cutters
or blades and strengthening or stiffening the same by forming a rib or ribs, or by
forming a rib and groove or ribs and grooves or by forming an indent or indents or
series of indentations or corrugations by casting, forging, stamping, pressing, rolling

page_text: or otherwise manipulating the knives, cutters or blades, or the material of which they
are constructed.
We e arrange and distribute the ribs, grooves indentations or corrugations herein
referred to in a variety of ways as for example in a Machine Chaff Knife, we some-
times form them longitudinally or parallel to the cutting edge of the blade or
longitudinally in continuous or intermittent wave lines or radially towards the cutting
edge, or in some cases a combination of the foregoing arrangement and distribution of
the ribs grooves or indentations is adopted.
In some cases the ribs, grooves or indentations may be made on one or both sides,
but as it is more convenient to have one side of the knife with a flat surface for
grinding, we should by preference form the ribs or projections, formed by the indenta-
tions, so that they come to the back of the knife, cutter or blade leaving the reverse
side plain for grinding.
The grooves and indentations formed on the grinding side, not interferring with the
operation of grinding.
The nature of my Invention will be better understood on reference to the
accompanying sheet of drawings in which,
Fig. 1, is an illustration of a Machine Chaff Knife, Cutter or Blade, made of thin
material which has been strengthned and stiffened by forming a convex and concave
rib and groove longitudinally or parallel or nearly parallel to the cutting edge.
Fig. 2, is a section of the same.
Fig. 3, represents a similar knife, cutter or blade, with two such ribs and
grooves.
Fig. 4, being a section of the same.
Fig. 5, represents a similar knife, cutter or blade, with the ribs and grooves made
square instead of convex and concave.
Fig. 6, being a section of the same.
Fig. 7, represents a similar knife, cutter or blade, with the ribs and grooves formed
in longitudinal wave lines.
Fig. 8, being a section of the same.
Fig. 9, represents a similar knife cutter or blade, with the ribs and grooves formed
both longitudinally and radially.
Fig. 10, being a section of the same.
The same letters refer to similar parts throughout the several views.
a,
is the cutting edge of the knife cutter or blade.
b, b, is the longitudinal rib or groove or ribs and grooves.
c, c, is a longitudinal rib or groove formed in continuous wave lines.
d, is a longitudinal rib or groove and
e, e, e, are radial ribs or grooves in combination with the last named longitudinal
rib, d.
ff, are bolt holes by means of which the knife, cutter or blade, may be secured
to the arm or wheel of the machine.
Having now particularly described and ascertained the nature of our Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;
(1). In machine chaff knives, turnip cutters, and the like machine knives, cutters or
blades, the strengthening and stiffening of the same, by forming a rib or ribs, or by
forming a rib and groove, or ribs and grooves, indent or indents, or series of indenta-
tions or corrugations, by casting, forging, stamping pressing rolling or otherwise
manipulating such knives, cutters or blades, or the material of which they are
constructed, substantially as and for the purposes herein described and illustrated.
Dated this 10th day of May 1890.
R. HEBER RADFORD,
Agent for the Applicants.