AN IMPROVED MANUFACTURE OF ROTARY OR ROSE CUTTERS
Year: 1881

page_text: LETTERS PATENT to Charles Denton Abel, of No. 28, Southampton
Buildings, Chancery Lane, in the County of Middlesex, for an Invention of
"AN IMPROVED MANUFACTURE OF ROTARY OR ROSE CUTTERS." A com-
munication from abroad by Wilhelm Lorenz, of Carlsruhe, Baden, in the
German Empire.
PROVISIONAL SPECIFICATION left by the said Charles Denton Abel at the
Office of the Commissioners of Patents on the 29th December 1881.
CHARLES DENTON ABEL of No. 28 Southampton Buildings Chancery Lane
in the County of Middlesex. "AN IMPROVED MANUFACTURE OF ROTARY OR
ROSE CUTTERS." [A communication from abroad by Wilhelm Lorenz, of
Carlsruhe, Baden, in the German Empire.]
The improved construction of rotary or rose cutters shewn in the accompanying
Drawing have the peculiar property that :-
"
1, With this form of cutter as shewn at Figs 1 and 2 termed "face-cutter
dovetail or undercut grooves can be cut, while by duplicating the cutters as at
Figs 3 and 4, and also the four shapes at Fig: 6, 'grooves of any desired form may
be cut.
2, The holding stem b and h. is, contrary to the usual construction, formed at the
smaller part of the cutterhead.
3, The formation of these cutters is effected by pressing or stamping in corre-
spondingly formed dies whereby they are enabled to be manufactured by
machinery.
This manufacture is effected as follows:-A cutter is first accurately formed to
act as a pattern from which others are to be produced, it is then hardened and
pressed with considerable pressure in a matrix the cone or recess of which corre
sponds to the actual height of the teeth of the pattern, or in other words, whose
general configuration corresponds to the form of the pattern. The configuration
of the teeth having been sharply impressed in the matrix, this is hardened so as to
CD C

page_text: constiute a die (for which purpose the hardening process described in the Specifi-
cation to Patent No. 115 of 1879, being a communication to me from Wilhelm
Lorenz, is by preference employed), and blanks b b¹ for rose-cutters, previously
moulded in dies are pressed in such dies a as shewn at Fig 1.
The head b³
serves to enable the teeth to be sharply formed and is afterwards turned off.
Fig: 2 shews the mode of securing the face-cutters, and of their operation, & being
the cutter spindle b b the cutter, c the clamping socket, e the clamping nut and
f the object to be cut, which in this case is having a dovetail or undercut groove
formed on it, as shewn in plan at Fig: 2a.
f
In Fig: 3 is shewn the mode of forming a surface-cutter, the dios i and g having
been formed with teeth by pressure as previously described; the two dies i and g
are slid over the stems of the previously formed blank h h¹ and are forced together
by strong pressure.
Fig: 4 shews the application of the surface-cutter, K being the cutter-spindle,
Z the lathe centre and m the article to be cut, which in this case is shewn having
an angular groove cut in it, as indicated in plan at Fig: 4a.
At Fig: 5 is shewn the form of the teeth of the cutter to an enlarged scale.
Fig: 6 shews various other configurations of the cutters, either for face-cutters, or,
when duplicated, similarly to Fig: 4 as surface-cutters, such cutters being formed
of any desired size by pressure in dies as above described.
Although I have shewn and described the cutters as being formed with a stem
in one piece therewith they may also be formed with a central hole either
cylindrical or tapering, into which a stem is afterwards fixed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Denton Abel in the Great Seal Patent Office on the
19th June 1882.
CHARLES DENTON ABEL of No. 28 Southampton Buildings Chancery Lane in
the County of Middlesex. "AN IMPROVED MANUFACTURE OF ROTARY OR
ROSE CUTTERS." A communication from abroad by Wilhelm Lorenz of Carlsruhe
Baden, in the German Empire.
The improved construction of rotary or rose cutters shewn on the accompanying
Drawing have the peculiar property that :-
"
1, With this form of cutter as shewn at Figs 1 and 2, termed "face cutter
dovetail or undercut grooves can be cut, while by duplicating the cutters as at
Figs 3 and 4 and also the four shapes at Fig 6, grooves of any desired form may.
be cut.
2, The holding stem b and h is, contrary to the usual construction, formed at the
smaller part of the cutter head.
3, The formation of these cutters is effected by pressing or stamping in corre-
spondingly formed dies, whereby they are enabled to be manufactured by
machinery.
This manufacture is effected as follows :-A cutter is first accurately formed to
act as a pattern from which others are to be produced, it is then hardened and
pressed with considerable pressure in a matrix the cone or recess of which corre-
sponds to the actual height of the teeth of the pattern, or in other words whose
general configuration corresponds to the form of the pattern. The configuration of
the teeth having been sharply impressed in the matrix this is hardened so as to con-
stitute a die (for which purpose the hardening process described in the Specification
to Patent No. 115 of 1879 being a communication to me from Wilhelm Lorenz is
by preference employed) and blanks 6 b¹ for rose cutters, previously moulded in
dies are pressed in such dies a as shewn at Fig 1. The head be serves to enable
the teeth to be sharply formed and is afterwards turned off.
Fig 2 shews the mode of securing the face cutters and of their operation d, being
the cutter spindle, 6 b' the cutter, c the clamping socket, e the clamping nut and
f the object to be cut, which in this case is having a dovetail or undercut groove
formed on it, as shewn in plan at Fig 2a. In Fig 3 is shewn the mode of forming
a surface cutter, the dies i and g having been formed with teeth by pressure as
previously described; the two dies i and g are slid over the stems of the previously
formed blank h h¹ and are forced together by strong pressure.
Fig 4 shews the application of the surface cutter, K being the cutter spindle,
7 the lathe centre and m the article to be cut, which in this case is shewn having
an angular groove cut in it, as indicated in plan at Fig. 4a.
At Fig 5 is shewn the form of the teeth of the cutter to an enlarged scale.
Fig 6 shews various other configurations of the cutters, either for face cutters, or,
when duplicated similarly to Fig. 4, as surface cutters, such cutters being formed of
any desired size by pressure in dies as above described.
Although I bave shewn and described the cutters as being formed with a stem
in one piece therewith they may also be formed with a central hole either
cylindrical or tapering, into which a stem is afterwards fixed, as shewn at b b¹
Figs 7 and 8.
Having thus described the nature of the said Invention and in what manner

page_text: the same is to be performed as communicated to me by my foreign correspondent, I
claim:
The herein described improved manufacture of rotary or rose cutters produced by
pressing in dies.
In witness whereof I the said Charles Denton Abel have hereunto set my
hand and seal this Nineteenth day of June in the year of our Lord One
thousand eight hundred and eighty two.
CHAP. D. ABEL. (L.S.)