Improvements in Adjustable Rotary Milling Cutters and the Method of Setting Tools for the same.
Year: 1898

page_text: Improvements in Adjustable Rotary Milling Cutters and the Method
of Setting Tools for the same.
ALFRED GOZZARD, 41, Wolseley Road, Sheffield, Yorkshire, Engineer, do
hereby declare the nature of this invention to be as follows....
To insure the correct working of my invention, I construct two circular
plates, with pockets or slots capable of receiving the tools for accomplishing the
work to be done, the said tools to be secured in position by wedges, screws, or
other convenient means I then construct a mandril or spindle of suitable
dimensions provided with a flange or collar, at a convenient distance from one
end, against which one of the aforementioned plates locks itself with a left hand
thread or screw at the short end of the mandiil from the said flange or collar,
at this end of the mandril there is also a removeable taper pin or cotter, or other
means, for revolving the said mundiil or spindle in any ordinary lathe or machine
On the other or long end of the mandril, which is also provided with a left hand
thread, is placed a similar circular cutter holder or plate, held in position by a
lock nut, between which and the plate is a suitable washer, this washer is pro-
vided with a lug or projection on the inside, which fits into a grove or channel of
suitable length and depth cut in the long end of the spindle, allowing the washer
to be moved along without turning round, so that by unscrewing, or screwing up
the said lock nut and screwing back the circular plate or cutter holder against
the washer various sizes or thickness of work may be done on both sides at one
operation or, by removing one of the said circular plates on one side only
And further, to enable me to place all the cutting edges of the tools in both
the said circular plates or cutter holders at an exact equal distance from the
inside face of the cutter holders I provide a setting plate, which 18 constructed in
the following manner; On the upper side of the setting plate 18 a perfectly
smooth flat surface and through the centre is a bolt, nut and washer, to fasten
down the cutter holder on this plate, in operation I remove the cutter plates from
the mandril; remove all the cutters, gind on sharpen the cutters, place the
cutter holder on the setting plate with the bolt through the centie hole; insert
a thickness of waiting paper, or other suitable material between the cutter holder
and setting plate, to cause the cutters to project the required distance for work-
ing, fastening down the cutter holder with the bolt, I then replace the cutters
into the pockets or slots, pressing down the tting edge on the setting plate, and
fasten them by the wedges, or screws or other means provided, replace the cutter
DQ27

page_text: I repeat this operation
holders or plates on the mandril in the required position
from time to time, as the cutting edge of the tools wears away
Dated thin 6th day of Tune 1908
Improvements in Adjustable Rotary Milling Cutters and the Method
of Setting Tools for the same.
ALFRED GOZZARD, Engineer, 41, Wolseley Road, Sheffield, 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:-
To ensure the correct working of my invention, I construct two circular
plates, (a, a) with pockets or slots (b) capable of receiving the tools (c) for accom-
plishing the work to be done, the said tools to be secured in position by wedges
screws or other convenient means I then construct a mandril, or spindle (d) of
suitable dimensions, provided with a flange or collar (e) at a convenient distance
from one end against which one of the aforementioned plates locks itself with a
left hand thread or screw at the short end of the mandril from the said flange or
collar, at this end of the mandril there 18 also a removable taper pin or cotter, (f)
or other means for revolving the said mandiil or spindle in any ordinary lathe or
machine On the other or long end of the mandiil, which is also provided with
a left hand thread, 18 placed a similar encular cutter holder or plate, held in
position by a lock nut (g) between which and the plate is a suitable washer (h)
this washer is provided with a lug or projection, on the inside, which fits into a
grove or channel (2) of suitable length, and depth, cut in the long end of the
spindle (d), allowing the washer (h) to be moved along without turning round,
so that by unscrewing or screwing up the lock-nut (9) and screwing back the
circular plate, or cutter holder (a) against the washer (h) various sizes, or thick-
ness of work may be done on both sides at one operation, or, by removing one of
the said circular plates (a) on one side only
And further, to enable me to place all the cutting edges of the tools (c) in
both the said circular plates or cutter holders, (a a) at an exact equal distance
from the inside face of the cutter holders, I provide a setting plate () which 18
constructed in the following manner; on the upper side of the setting plate (7) 18
a perfectly smooth flat surface and through the centre is a bolt, (k) with a nut
and washer () to fasten down the cutter holder on this plate: in operation I
remove the cutter plates (a a) from the mandril (d) remove all the cutters (c)
grind or sharpen the cutters; place the cutter holder on the setting plate with
the bolt through the centre hole, insert a thickness of writing paper, or other
suitable material (m) between the cutter holder and setting plate, to determine
the distance the cutters shall project from the face of the cutter holder, by
using thicker material I cause more eager, or rougher cuts to be taken, or by
using thinner material smoother, or less eager cuts, foi very fine cuts, I use no
paper or material, fastening down the cuttei holder with the bolt I then replace
the cutters into the pockets or slots (b) pressing the cutter back into the slot,
with the cutting edge down on the bare setting plate (2) and in this position I
fasten them by the wedges or screws or other means provided, replace the cutter
holders on the mandril (d) in the required position I repeat this operation with
both plates, from time to time as the cutting edge of the tools wears away

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim 18..
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1. The manner and method of constructing and working the tool holder, plates