Improvements in and relating to Machinery for Cutting Metal Blanks into Cutters" and for Grinding the same, which Improvements may be applied to Milling or Drilling Machines and other Machines, also Applicable for Cutting Gear Wheels and Bevel Wheels, and for Fluting Taps and such like.
Year: 1891

page_text: Date of Application, 12th Mar., 1891
Complete Specification Left, 10th Sept., 1891-Accepted, 5th Dec., 1891
66
PROVISIONAL SPECIFICATION.
Improvements in and relating to Machinery for Cutting Metal Blanks
into Cutters" and for Grinding the same, which Improvements
may be applied to Milling or Drilling Machines and other
Machines, also Applicable for Cutting Gear Wheels and Bevel
Wheels, and for Fluting Taps and such like.
I, JOHN WILLIAM TAYLOR of 85 Sycamore Road Aston Birmingham in the
County of Warwick, Engineer do hereby declare the nature of this invention to be
as follows:-
My machine consists of a horizontal cast iron table, upon which is fixed a
vertical pivot, capable of turning on its vertical axis, & having in it a horizontal
slot through which there passes a bar; this bar moving over the surface of the
table from the pivot as centre, & with a radius which can be varied by adjusting
the position of the bar in the pivot. At one end of the bar is an enlarged part,
into which is fitted a horizontal slide, capable of moving at right angles to the bar
& carrying a bracket; this bracket has a hole bored at right angles to the bar
to receive the mandrels on which the cutters or blanks to be operated upon are
placed, the plane of the cutter thus lying in the direction of the axis of the bar.
By means of the slide at the end of the bar, the cutter may be placed directly
To secure the
over the bar or at any distance (within limits) on either side of it.
first position a V shaped gauge is made to move in a slide cut in the top of
the enlarged part of the bar, & directly over the centre of it (the bar), so that
To
when both sides of the V touch the cutter, it is also central with the bar.
regulate the radius through which the cutter mandrel swings, there is marked on
the side of the bar a scale, which reads zero when the centre of the mandrel is
directly over the centre of the pivot. The cutter is divided into the required
number of teeth by means of a dividing plate placed on the cutter mandrel & a
catch fixed to the mandrel bracket & engaging with the notches in the rim of the
dividing plate. The table, together with the pivot, arm or bar etc., can be moved
bodily in a horizontal direction by a slide cut on the top of a short pedestal & a
stop is provided on the table to set the axis of the arm parallel to the travel of
this slide when it is not required to cut a radius. The bottom of this pedestal
fits into a base plate but is capable of being rotated into & fixed at any angle up
to 90°, the base plate being clamped to the table of any drilling or vertical
milling machine.
Supposing it be required to tooth a radius cutter, having a cutting edge of in.
radius & an outside diameter of 5 ins., the blank is fixed on the mandrel and
adjusted as described by the V shaped gauge, until the centre of the cutter
coincides with the axis of the bar; the scale on the side of the bar being placed
at 2 ins., the centre of the radius to be cut is brought directly over the centre of
the pivot & the tooth can be cut to any required depth by rotating the bar round
the pivot. Stops are placed on the sides of the table to prevent the bar rotating
too far in either direction.
In order to tooth a cutter of rectangular section the bar is fixed at right angles
to the main slide of the machine for cutting the rim & then is rotated until the
side of the cutter is almost parallel with the slide, a slight angle being allowed
for the customary taper tooth.
By using suitable mandrels & chucks I am enabled to cut small gear wheels &

page_text: to flute taps & reamers & by the addition of a special mandrel bracket to cut the
teeth of bevel wheels.
Dated this 11th day of March 1891.
JOHN WILLIAM TAYLOR.
Edward J. Payne & Son,
104, Colmore Row, Birmingham, Agents for the Applicant.
66
COMPLETE SPECIFICATION.
Improvements in and relating to Machinery for Cutting Metal Blanks
into Cutters" and for Grinding the same, which Improvements
may be applied to Milling or Drilling Machines and other
Machines, also Applicable for Cutting Gear Wheels and Bevel
Wheels, and for Fluting Taps and such like.
I, John William Taylor of 85, Sycamore Road Aston, Birmingham in the
County of Warwick, Engineer, 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, reference being had to the drawings
hereunto annexed and to the letters and figures marked thereon:―
Figure 1, is a side elevation of the improved machine.
Figure 2, a frout elevation.
Figure 3, a plan of the machine.
Figure 4, 1 side elevation of the additional back centre bracket.
My machine consists of a horizontal cast iron table (A) and main slide (A'),
upon the table is fixed a vertical pivot (B) capable of turning on its vertical
axis and having in it a horizontal slot (C) through which there passes a bar (D)
this bar moving the surface of the table from the pivot as centre and with a
radius (E) which can be varied by adjusting the position of the bar (D) in the
pivot.
This pivot that gives the rotating motion may be worked by a worm and worm
wheel or other suitable means if preferred.
At one end of the bar is an enlarged part (F) into which is fitted a horizontal
slide (G) capable of moving by suitable screw (G') at right angles to the bar and
carrying a bracket (H) this bracket has a hole bored at right angles to the bar
to receive the mandrels (J) on which the cutters or blanks (J¹) to be operated
upon are placed the plane of the cutter thus lying in the direction of the axis of
the bar.
By means of the slide (G) at the head of the bar, the cutter (J¹) may be placed
directly over the bar (D) or at any distance within limits on either side of it."
To secure the first position a V shaped gauge (K) Figure 3, is made to move
in a slide (K) Figure 1, cut in the top of the enlarged part (F) of the bar (D)
and directly over the centre of it (the bar) so that when both sides of the V
touch the cutter it is also central with the bar.
To iegulate the radius through which the cutter mandrel (J) swings there is
marked on the side of the bar (D) a scale (D¹) which reads zero when the centre
of the mandrel (JJ) is directly over the centre of the pivot (B).
The cutter (J) is divided into the required number of teeth by means of a
dividing plate (L) placed on the cutter mandrel (J) and a catch (L') fixed to the
mandrel bracket (H) and engaging with the notches in the rim of the dividing
plate (L).
The table (A) main slide (A') together with the pivot (B) arm or bar (D) etc.
can be moved bodily in a horizontal direction by a suitable handle and screw (M)
in a slide (M) cut on the top of a short pedestal (N) and a stop is provided on
the table (A) to set the axis of the arm parallel to the travel of the slide when
it is not required to cut a radius.

page_text: The bottom of this pedestal (N) fits into a base plate (N¹) but is capable of
being rotated into and fixed at any angle up to 90° the base plate (N¹) being
clamped to the table of any drilling or vertical milling machine.
Supposing it be required to tooth a radius cutter having a cutting edge of inch
radius and an outside diameter of 5 inches, the blank is fixed on the mandrel (J)
and adjusted as described by the shaped gauge (K) until the centre of the
cutter coincides with the axis of the bar the scale (D¹) on the side of the bar (D)
being placed at 2 inches, the centre of the radius to be cut is brought directly
over the centre of the pivot (B) and the tooth can be cut to any required depth
by rotating the bar round the pivot.
Stops are placed on the sides of the table to prevent the bar rotating too far
in either direction.
In order to tooth a cutter of rectangular section the bar (D) is placed in a line
with the slide (A') and is made secure by the screw or bolt (A") through the end
of the bar (D) the pins that secure the machine to the base plate (N') are then
slackened so that the machine may be fixed to the required angle, then by
actuating the slide (G) the blank is operated upon by the cutter and the required
taper tooth given to the wheel being produced, from the blank.
By using suitable mandrels and chucks I am enabled to cut such articles as the
following viz., side and face cutters, spiral cutters, angle cutters of any degree,
radius cutters both inside and out, small gear wheels, worm wheels, and also to
flute taps and reamers; and by the addition of a spiral mandrel bracket to cut the
teeth of bevel wheels etc.
For spiral cutting or for fluting taps and reamers the back centre bracket (P)
Figure 4 will be attached to the machine for the purpose of receiving the end of
the mandrels so as to obtain a rigid bearing for the same and thus to give
additional strength when cutting heavy work.
I will describe more fully the process of fluting taps and reamers and cutting
bevel and worm wheels.
For fluting taps and reamers a special mandrel is used which will receive the
square end of the tap, this mandrel having a square hole into which the end of
the tap or reamer fits, the dividing plate which is fixed upon the mandrel is then
66 set to the required number of flutes upon the tap or reamer.
The operation
of cutting is then effected by actuating the top slide (G) at right angles with the
machine and the flutes are thus enabled to be cut by the cutter.
When required to cut bevel or worm wheels it is necessary to change the top
slide (G) and substitute therefor the slide as shewn in Figure 4 with the mandrel
bracket (P) the object of this is to obtain the required angle for the teeth of the
bevel wheel being cut.
The angle required for the tooth is given by setting the bracket (P) at the
desired angle when the bracket itself is already at right angles with the machine
the angle for the tooth being determined by means of the scale shewn in Figure 4,
that being done by loosening the screw pins that secure the machine to the base
plate upon the table the whole machine may be adjusted and is then ready for the
cutting operation.
It is obvious that by placing an emery wheel instead of the toothing cutter on
the spindle of the drilling or vertical milling machine to which this machinery may
be applied the teeth of any cutter may be ground.
I am fully aware that other machines have been made for cutting and grinding
radius cutters etc. but what I claim as a novelty is that the machine herein
described being fixed upon any ordinary drilling or vertical milling machine table
or such like it is able to cut a radius of from 2 inches to th part of an inch and to
cut any number of teeth required without the aid of a "Former' which other
machines call for and also that it is positive in its action.
"
The machinery can also be placed upon the saddle of a lathe for turning
radiuses by applying a tool rest to work from the pivot or any angle within its
limited reach.

page_text: When the machine is used for any other purpose besides radius cutting it is
locked by means of the screw or bolt (A") at the end of the bar (D).
I wish it to be understood that I do not confine myself to the more precise
details herein set forth, as I may vary the details of same without departing from
this the general principle of my invention.
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 I
claim is,
First. The manner in which I construct my improved machinery and the
different parts constituting the same, and the manner in which i employ the said
machinery for cutting metal blanks into "cutters," such machinery being also
applicable for grinding the same, also applicable for cutting side and face cutters,
spiral cutters, angle cutters, of any degree, radius cutters, small gear wheels and
worm wheels and such like, also the teeth of bevel wheels, such improved machinery
being also applicable for fluting taps, and reamers all substantially as and for the
purposes herein set forth and specified.
Secondly. I claim the manner in which I adapt my improved machinery for use
in connection with drilling or vertical milling machines or such like machines
whereby any radius or blank may be cut from a fixed centre without the need of
using a "Former " substantially as and for the purposes herein set forth and
specified.
Thirdly. I claim generally the improvements in and relating to machinery for
cutting metal blanks into cutters and for grinding the same which improvements
or any mere equivalents thereof may be applied to milling or drilling machines
and other machines for the several purposes and in manner substantially as herein
set forth and specified.
D
T 1001
EDWARD J. PAYNE & SON,
104, Colmore Row, Birmingham, Agents for the Patentee.