Improvements in the Manufacture of Files, Rasps, Rimers, and Articles having a Cutting or Grinding Surface.
Year: 1889

page_text: Improvements in the Manufacture of Files, Rasps, Rimers, and
Articles having a Cutting or Grinding Surface.
I, FORTUNE-EDOUARD LECLERCQ, of 74, Avenue de Ternes, Paris, in the Republic
of France. 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:-
My invention relates to the manufacture of files, rasps, rimers, and similar tools.
the object being to so make such tools that they shall have a rapid cutting action and
not be liable to become choked up or dirty,
1 is well known that files as hitherto made, whatever may be their cut, become
rapidly choked up with the filings from the recesses or grooves being cut. in rou-
sequence of there being no means for discharging or removing such filings.
By my invention a discharge of the filings takes place from between the rows of
teeth of files, rasps, rimers &c., thereby overcoming the before naved objections.
In order 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 an elevation, and
Figure 2 is a section on line M N of figure 1, of a flat file, and
Figure 3 is an elevation of a rat-tail file made according to my invention.
My invention consists in providing between the rows of teeth CD, oblique
grooves E F of concave form and of a width proportionate to the eut of the file or
the like.
It will be seen by reference to the section shown in figure 2, which is taken across
the said grooves ou the line MX Figure 1 that the edge of each row of teeth on the
side which acts on the object being filed is perpendicular to the face of the file,
whilst the opposite side of each row is inclined towards the bottom of the discharge.
groove. The said grooves may be of any other suitable shape.
The toothed tops CD and the grooves which run parallelwise are formed, as
shown in figure 1, obliquely in relation to the length of the file so as to ensure a
continuity of working surface while the tool is in use.

page_text: It will be evident that the filings produced when using these files readily escapo
from the two sides of each row of teeth and that consequently these teeth cannot
remain choked up, the filings no longer rolling about between the file and the object
being cut thereby,
:
Figure shows a rat-tail file on the surface of which I usually form a series of
helical grooves,
Lean however, if desired, take a bar of sirel of suitable shape and
cut teeth on the ridges thereof as shown in the drawing. In this manner
successive rows of teeth and grooves arranged obliquely to the axis of the rat-tail
file.
obtain
My invention enn obviously he applied to half round, square, triangular, and other
forms of files and rasps as well as to rimors, artificial grindstones, &c., and in general
to all tools of a like description employed for cutting or grinding the surface of
materials.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is:
The manufacture and use of files, rasps, rimers, &c., tormed of successive rows of
teeth separated by discharge-grooves arranged obliquely with relation to the axis
at the file or other tool, substantially as hereinbefore described and illustrated in the
aerompanying drawing.
10 8.9
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