An Improvement in File-edged or Serrated Spiral Cutters for Cropping or Shearing Cloth, or for other purposes.
Year: 1894

page_text: Date of Application, 2nd July, 1894
Complete Specification Left, 26th Mar., 1895-Accepted, 24th May, 1895
PROVISIONAL SPECIFICATION.
An Improvement in File-edged or Serrated Spiral Cutters for
Cropping or Shearing Cloth, or for other purposes.
HENRY SMITH 83 Thirlwell Road Heeley Sheffield Engineer JAMES DICKSON,
Waverley Works Sheffield Steel and File Manufacturer, do hereby declare the
nature of this invention to be as follows:-
This invention has for its object to provide "reversible" file-edged or serrated
spiral cutters in any known form, such as are used in the manufacture of linen
jute cotton velvet or any other fabric where a file-edged or serrated spiral cutter
is preferred for the purpose of cropping, shearing, or cleaning the cloth or other
purposes so that when the said "reversible" file-edged or serrated spiral cutters
are mounted or fixed upon the cylinder or spindle upon which they are revolved,
they can in practice, (when the working or cutting edges become dull or impaired
and require re-sharpening) be reversed, by turning the cylinder upon which they
are mounted, round in its bearings-i.e. lifting it from its bearings or the bushes
in which it revolves or rotates & putting the end which has been working or
running in the right hand bearing, into the left hand bearing, or the reverse,
thus bringing the back edges of the spiral cutters (which it is proposed to file-cut
or serrate, as well as the front edges), and which have been left sharp, into the
front or cutting position, while the dull or impaired edges are put to the back so
that during the process of working they will re-sharpen, and so avoid the cost and
time occupied in re-grinding independently.
By constantly or repeatedly changing or reversing the cutting edges as they
become dull or impaired in working the whole of the revolving spirals is kept true
and the wear is equalised from end to end.
To accomplish this purpose we file-cut or serrate the form or section of spiral
cutter to be used on both sides of the web or flange or flanges wherever it presents
a cutting edge, so that in practice whichever side is presented to the work, the
cutting or operating edge is file-cut or serrated.
In all forms of file-edged or serrated spiral cutters now in use, one side only
is file-cut or serrated, therefore one edge only is available for work as a file-edged
spiral cutter, and therefore cannot be turned round or reversed, but in practice
must frequently be re-sharpened to do its work effectively.
Having particularly described and ascertained the nature of this invention,
what we claim is :-
I. A bayonet form of spiral having both sides of the web or cutter file-cut or
serrated.
II. A single flange form of spiral cutter having both sides or cutting edges file-
cut or serrated.
III. A double flange form of spiral cutter i.e. a spiral cutter having two flanges
or cutters with one base common to both, having four sides, i.e. two sides of each
flange or cutter file-cut or serrated.
IV. Any known form of spiral cutter with or without base or such as are
caulked in grooves of the cylinder upon which they are mounted, having both
sides file-cut or serrated and for whatever purpose used.
Dated the 2014 day of June 1904
TIT
HENRY SMITH.
JAMES DICKSON.
[Price Ed.]
HENRT
JAMES DICKSON.

page_text: An Improvement in File-edged or Serrated Spiral Cutters for
Cropping or Shearing Cloth, or for other purposes.
HENRY SMITH 83 Thirlwell Road, Heeley Sheffield Engineer JAMES DICKSON
Waverley Works Sheffield Steel and File Manufacturer 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 has for its object to provide "reversible" file-edged or serrated
spiral cutters in any known form, such as are used in the manufacture of linen,
jute cotton, velvet, or any other fabric where a file-edged or serrated spiral cutter
is preferred for the purpose of cropping, shearing or cleaning the cloth or other
purposes so that when the said "reversible" file-edged or serrated spiral cutters
are mounted or fixed upon the cylinder or spindle upon which they are revolved,
they can in practice (when the working or cutting edges become dull or impaired
and require re-sharpening) be reversed by turning the cylinder upon which they
are mounted round in its bearings i.e. lifting it from its bearings or the bushes
in which it revolves or rotates and putting the end which has been working or
running in the right hand bearing, into the left hand bearing, or the reverse
thus bringing the back edges of the spiral cutters (which it is proposed to file-cut
or serrate as well as the front edges) and which have been left sharp, into the
front or cutting position while the dull or impaired edges are put to the back so
that during the process of working they will re-sharpen, and so avoid the cost and
time occupied in re-grinding independently.
By constantly or repeatedly changing or reversing the cutting edges as they
become dull or impaired in working the whole of the revolving spirals is kept
true and the wear is equalised from end to end.
To accomplish this purpose we file-cut or serrate the form or section of spiral
cutter to be used, on both sides of the web or flange or flanges F, wherever it
presents a cutting edge, so that in practice whichever side is presented to the
work the cutting or operating edge E, is file-cut or serrated as at S.
In all forms of file-edged or serrated spiral cutters now in use one side only is
file-cut or serrated, therefore one edge only is available for work as a file-edged
spiral cutter, and therefore cannot be turned round or reversed without losing the
advantage of the file-cut edge but in practice must frequently be re-sharpened to
do its work effectively.
The annexed sheet of drawings will illustrate our invention as applied to several
forms of spiral cutters.
""
Fig. 1, represents the cross sectional shape of what is known as the "bayonet"
form of spiral cutter, the serrations being cut upon each side of the flange or
blade F. as indicated.
Figs. 2 and 3, show the file cutting or serration upon the obverse and reverse
sides of the flange.
Fig. 4, represents a short piece of a single flange spiral cutter, and its reverse
side, showing the serrations on both sides.
Fig. 5, represents a short length of double flange spiral cutter, and its reverse
side, showing the serrations on both sides.
Fig. 6, represents a section of spiral cutter which is let into a groove in the
cylinder, and which is cut or serrated on both its sides.
Similar letters of reference indicate similar parts in any of the figures.
F, is the web, blade or flange of the cutter; B, is the base, which is curved to
fit upon the periphery of the cylinder C, to which the cutters are attached. S is
the file-cut or serrated part of the flange F, and E, is the cutting edge.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is,
I. A bayonet form of spiral having both sides of the web or cutter file-cut or
serrated.
II. A single flange form of spiral cutter having both sides or cutting edges file
cut or serrated.
III. A double flange form of spiral cutter i.e. a spiral cutter having two flanges
or cutters with one base common to both, having four sides, i.e. two sides of each
flange or cutter file cut or serrated.
IV. Any known form of spiral cutter with or without base, or such as are
caulked in grooves of the cylinder upon which they are mounted, having both sides
file cut or serrated and for whatever purpose used.
Dated this 25th day of March 1895.
HENRY SMITH.
JAMES DICKSON.