Improvements in or relating to the Manufacturing of Iron-cutting- saws.
Year: 1896

page_text: Date of Application, 8th Apr., 1896
Complete Specification Left, 6th Jan.. 1897-Accepted, 27th Mar., 1897
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Manufacturing of Iron-cutting-
saws.
I, EUGEN GRAF, of 18 Gerlachstreet, Aix-la-Chapelle, Rhenish Prussia,
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
In order to have the blade of iron-cutting-saws easily passed at the notch of the
work-piece, the teeth of such saws must always be thickest on the outmost border
and their breadth must decrease by degrees to the thickness of the blade towards
the center of circular saws respectively to the back of longitudinal saws.
Until now such saws were manufactured in different ways; either by jumping
the teeth by means of a setter by handwork whereby, on account of the accumu-
lation of material, the teeth on their outer borders got thicker, or, also after having
made the teeth, by grinding the blade from the outmost border of the teeth to
the center of the blade of circular-saws, respectively to the back of longitudinal
saws.
The saws manufactured in the first named manner, do not answer to all require-
ments because, on account of the accumulation of material on the outer border of
the teeth, there has not arisen a perfectly conical shape of the teeth, but the
breadth of the latter is on a pretty large extension the same, for the jumping by
hand is made by fits; on the other side the shape of the different teeth, made in
this way, is quite irregular, so that these saws often suffer a fracture.
Moreover this way of manufacturing saws requires much time and a great deal
of handiness.
The second way of manufacturing saws, the grinding, does not answer too to
all requirements, as far as the same is not to be applied to saws of little thickness
and these saws also cannot be jumped.
Now, by the apparatus represented in the annexed drawings all iron-cutting-saws
of any thickness may be in a short time perfectly jumped so that the outer border
of the teeth'shows in all ways the greatest thickness and the teeth have perfectly
conical cross-section.
In the annexed drawing,
Fig. 1 represents the apparatus in side-view,
Fig. 2 shows in side-view and on a greater scale the broken part of a saw partly
provided with teeth, manufactured by means of this apparatus.
Fig. 3 represents the same saw-blade in front-view in order to show the conical
of the outer border of the blade, and finally
shape
Figs. 4 and 5 show the principal parts of the apparatus in front-view.
In the following I will describe the manner of manufacturing circular saws only,
the longitudinal saws being made in quite a similar manner.
In order to work the blade B by means of the new apparatus, the blade must
have a diameter little greater than the ready saw. The blade is pressed between
two circular steel-disks D mounted on the axle A. These steel disks have just as
great a diameter as the ready saw. The inner peripheries of said disks, turned to
the blade B, are according to the shape of the teeth, fashioned in the lathe as it is

page_text: seen in Figs. 4 and 5. After having arranged the blade B between the disks D,
the axle A is put into a dull rotation.
Above the blade there rests in an oblique direction the blunt setter S, the pivoted
shaft of which is connected with the springs (Fig. 1) whereby the setter is held
up. During the rotation of the blade B, the setter S is very quickly, but quite
softly put down by means of the tappet-hammer H so that the prominent border of
the blade is driven by degrees into the conical groove G (Fig. 5) formed by the
two steel-disks D. Naturally this groove has best the shape of a triangle, but may
also have, if desired, any other shape.
The blade mechanically jumped in this way has the shape represented by Figs. 2
and 3, in which blade the teeth are now cut or stamped.
In order to manufacture longitudinal saws in this way, I need instead of the
circular steel-disks longitudinal flat-irons, between which the blade is pressed and
showing in their combination the desired groove. After having brought the blade
between the flat-irons, the latter are slowly moved in a straight direction under the
setter S and the tappet-hammer H.
Instead of the setter and the tappet-hammer I may also arrange any other
usable mechanism to drive the prominent material into the groove. So I may
use a quickly rotating roller that approaches more and more to the disks and
drives the prominent material into the groove. Such a roller is shown by dotted
lines in Fig. 1.
Dated this 4th day of April 1896.
JOSEPH MOHLIG,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacturing of Iron-cutting-
saws.
I, EUGEN GRAF, of Aix-la-Chapelle, Rhenish Prussia, Germany, 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 improvements in manufacturing iron-cutting-saws; and
the objects of my improvements are to provide means for continuously jumping the
prominent border of the unworked saw-blade into the groove formed by two disks,
whereafter the teeth are made in the jumped blade.
I attain these objects by the mechanism illustrated in the drawings I filed with
the Provisional Specification.
In those drawings
Fig. 1 represents the new apparatus in side-view;
Fig. 2 shows in side-view and on a greater scale the broken part of a saw-
blade partly provided with teeth and manufactured by means of the aforesaid
apparatus.
Fig. 3 represents the same saw-blade in front-view in order to show the conical
shape of the outer border of the blade, and finally
Figs. 4 and 5 show the principal parts of the apparatus in front-view.
Similar letters refer to similar parts throughout the several views.
In order to give to the blade of iron-cutting-saws sufficient play to pass the
notch, the teeth of such saws must always be thickest on the outmost border and
their breadth must decrease by degrees to the thickness of the blade towards the
center of circular-saws respectively to the back of longitudinal saws.

page_text: Such saws were manufactured until now in different ways; either by jumping
the teeth by means of a setter by handwork whereby, on account of the accumulation
of material, the teeth on their outer border got thicker; or, after having mide the
teeth, by grinding the blade from the outinost border of the teeth to the center of.
the blade of circular saws, respectively to the back of longitudinal saws.
The saws manufactured in the first name manner, do not answer to all
requirements because, on account of the accumulation of material on the outer
border of the teeth, there has not arisen a quite conical shape of the teeth, but the
breadth of the latter is on a pretty large extension the same, for the jumping by
hand is made by shocks; on the other side the shape of the different teeth made in
this way is quite irregular, so that these saws still often suffer a fractare.
Moreover this way of manufacturing saws requires much time and a great deal of
haudiness.
The second way of manufacturing saws, the grinding, does not answer too to all
requirements, as far as the same is not to be applied to saws of little thickness, and
these saws also cannot be jumped.
Now, by the new apparatus all iron-cutting-saws of any thickness may be in a..
short time perfectly jumped so that the outer borler of the teeth shows in all ways
the greatest thickness and the teeth have perfectly conical cross-section.
The apparatus represented by the drawings is destined to the manufacturing of
circular saws only.
The circular steel-disks D are mounted on the slowly rotating shaft A and serve
for pressing between themselves the unworked saw-blade not yet provided with
teeth. The inner peripheries of said disks are, according to the prescribed conical
shape of the saw-teeth fashioned in the lathe as is seen in Figs. 4 and 5, so as to
form in their combination a conical groove. This groove naturally has best the
shape of a triangle, but also may have, if desired any other shape liked.
Above that groove there is arranged in an oblique direction the blunt setter S,.
the extremity of the pivoted shaft of which is connected with the spring.
Upon the blunt setter S rests the tappet-hammer H, the shaft of which is
supported in bearings and the extremity of that shaft is shaped to a can. Near
this cam is mounted on a very quickly rotating axle-tree a cam-ring.
Now, I will proceed to explain the operation of the apparatus.
When the saw-blade, the diameter of which is a little greater than the diameter.
of the disks, is arranged between the disks, the axle A is put into a slow rotation.
The setter S is, during the rotation of the blade, very quickly, but quite softly
put down by means of the tappet-hammer. H, so that the prominent border of the
blade is driven by degrees into the couical groove G formed by the two steel--
disks D.
The blade mechanically jumped in this way has the shape represented by:
Figs. 2 and 3, in which blade the teeth are now cut or stamped.
In order to manufacture longitudinal saws in this way, I need instead of the
circular steel-disks longitudinal flat-irons, between which the blade is pressed,...
showing in their combination the desired groove.
When the blade is brought in, they are slowly moved in a straight direction
under the setter S and the tappet-hammer H.
Instead of the setter and the tappet-hammer I also may arrange any other
usable mechanism liked to drive the prominent material into the groove. So I may
use a quickly rotating roller that approaches more and more to the disks and drives
the prominent material into the groove. Such a roller is shown by dotted lines in
Fig. 1.
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
claim is
In order to manufacture circular or longitudinal saws with perfectly conical
teeth, the combination of two slowly rotating steel disks, respectively of two.

page_text: flat-irons slowly moving in a straigt direction, between which the unworked saw-
blade of a greater diameter, respectively of a greater breadth, is pressed, the
peripheries of said disks, respectively the upper extremities of said flat-irons, are
fashioned in the lathe according to the conical shape of the saw-teeth, with a
pixoted spring-acted setter, a tappet-hammer supported in bearings, or, instead of
the setter and the tappet-hammer a quickly-rotating roller.
Dated this 5th day of January 1897.
JOSEPH MÖHLIG,
Aix-la-Chapelle, Germany, Agent for Applicant.