Improvements in or for Machines for Drilling or Boring Variously Shaped Holes, applicable also for Shaping or Trueing the Exteriors of Nuts or for analogous Operations.
Year: 1892

page_text: Date of Application, 13th Aug., 1892
Complete Specification Left, 12th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in or for Machines for Drilling or Boring Variously
Shaped Holes, applicable also for Shaping or Trueing the
Exteriors of Nuts or for analogous Operations.
We, ANDREW KING of 100° Queen Victoria Street, Engineer and ALBERT
CHARLES OAKES of 34 Aldermanbury, Merchant, both in the City of London do
hereby declare the nature of this invention to be as follows:-
This invention relating to machinery or attachments for machinery for drilling
or boring variously shaped holes and shaping or trueing nuts and for analogous
operations is more especially applicable to machines of the class described in the
Specification of Letters Patent No. 3850 dated the 11th March 1890 granted
to Alfred Hugh Tyler and John Stuart Ellis de Vesian. According to our
present invention the tool carrying spindle being capable of lateral displacement in
a driving collar or support as described in the said former Specification has the
lateral motion imparted to it by means of adjustable guides or surfaces capable of
radial adjustment which causes them to act upon a roller fixed upon the spindle and
cause the tool to deviate from a circular path at any desired number of points and
to any required extent corresponding to the shape or configuration of the hole or
other surface or surfaces to be formed by the said tool.
These adjustable guiding surfaces or templates may be formed by one or more
guide plates or dies sliding in radial grooves or guides and capable of being readily
removed in order to enable the number employed to be changed in accordance with
the number of angles or sides in the figure to be described by the cutting edge of
the tool. These guide plates are also arranged to admit of being displaced radially
by any suitable mechanism or preferably by means of inclined slots acted on by
studs or pins carried by a cover plate or ring to which a circular motion is imparted
by means of a key lever or by a worm engaging with worm teeth provided on the
periphery of the said ring or by any other suitable combination of mechanism.
By rotating this ring the pins act upon the inclined slots in the radially sliding
guide plates and cause to approach or recede from the centre of rotation according
to the direction in which the cover plate is rotated. When the guide plates have
been adjusted in the required positions corresponding to the area of the figure
described by the tool they are firmly fixed in position by means of set screws. The
tool carrying spindle being acted on by a spring or springs and being supported by
a collar and capable of oscillating in a spherical bearing as described in the afore-
said Specification is caused to deviate from the circular path by the action of the
adjustable guide plates and describes a figure of the required form.
In place of oscillating in a spherical bearing the hollow shaft containing and
driving the tool carrying spindle may be provided with a spring at the upper and
lower extremities which springs constantly tend to force the tool carrying spindle
to one side. By providing radially adjustable dies or guide plates operating as
hereinbefore described at the lower end as well as at the upper end of the spindle
the latter is caused to move parallel with itself in accordance with the adjustment
of the guide plates or dies the spherical bearing being dispensed with. When this
arrangement is employed, the mechanism for adjusting the guide plates or dies is
arranged to act simultaneously upon the guides at the upper and lower extremities.
of the spindle.
According to our present invention the tool carrying spindle being arranged to
rock or move laterally in a slot formed in the driving collar and being driven
directly from the latter is provided with a squared portion or parallel sides working
against corresponding surfaces formed in the driving spindle and is acted on by a .

page_text: spring or springs arranged in recesses provided for their reception in the said
driving spindle, which springs are thus enabled to act directly on the tool carrying
spindle in place of acting on it through the intervention of the sliding piece
employed in the machine constructed according to the said former Specification
No. 385000
Dated the 13th day of August 1892
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in or for Machines for Drilling or Boring Variously
Shaped Holes, applicable also for Shaping or Trueing the
Exteriors of Nuts or for analogous Operations.
We ANDREW KING of 100° Queen Victoria Street Engineer and ALBERT
CHARLES OAKES of 34 Aldermanbury Merchant both in the City of London
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:-
This invention relating to machinery or attachments for machinery for drilling or
boring variously shaped holes and shaping or trueing nuts and for analogous
operations is more especially applicable to machines of the class described in the
Specification of Letters Patent No. 3850 dated the 11th March 1890 granted to
Alfred Hugh Tyler and John Stuart Ellis de Vesian some improvements upon
which are also described in the Specification of Letters Patent No. 10923 granted
to them and dated the 26th June 1891.
According to our present invention the tool carrying spindle (which is capable of
lateral oscillation in a driving collar or support as described in the said former
Specifications) has the required deviation in a lateral direction imparted to it by
means of adjustable guides or surfaces capable of radial adjustment which causes
them to act upon a roller fixed upon the spindle and cause the tool to deviate from
a circular path at any desired number of points and to any required extent
corresponding to the shape or configuration of the hole or other surface or surfaces
to be formed by the said tool.
These adjustable guiding surfaces or templates may be formed by a guide plate
or die or guide plates or dies sliding in grooves or guides and capable of being
readily removed in order to enable the number employed to be changed in
accordance with the number of angles or sides in the figure to be described by the
cutting edge of the tool. These guide plates are also arranged to admit of being
displaced towards and from the centre by any suitable mechanism preferably by
means of inclined slots acted on by studs or pins carried by a cover plate or ring to
which a circular motion is imparted by means of a key lever or by a worm engaging
with worm teeth provided on the periphery of the said ring or by any other suitable
combination of mechanism.
By rotating this ring the pins act upon the inclined slots in the radially sliding
guide plates and cause them to approach or recede from the centre of rotation
according to the direction in which the cover plate is rotated. Or the pins may be
in the plate and the slots in the dies. When the guide plates have been adjusted in
the required positions corresponding to the area of the figure described by the tool
they are firmly fixed in position which may be by means of set screws.
The tool
carrying spindle is acted on by a spring or springs and is supported by a collar or
bearing in such a way as to allow of oscillatory movement of the spindle (for
instance by means of a spherical bearing as described in the aforesaid Specifications)
to deviate from the circular path by the action of the adjustable guide plates and
cause the axial line of the spindle to describe a figure of the required form.
In place of the spindle being mounted to oscillate it may have a reciprocating

page_text: lateral motion which may be effected by making the device by which the tool
carrying spindle is driven in the form of a long bearing provided with a spring or
springs preferably one at the upper extremity and one at the lower extremity
which spring or springs constantly tends or tend to force the tool carrying spindle
to one side. By providing adjustable dies or guide plates operating as hereinbefore
described at the lower end as well as at the upper end of the spindle the latter is
caused to reciprocate laterally in the path governed by the guide plates or dies.
When this arrangement is employed the mechanism for adjusting the guide plates
or dies may be arranged to act simultaneously or separately upon the guides at the
upper and lower extremities of the spindle.
And in order that our said invention may be fully understood we shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures of the accompanying drawings the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 represents in sectional elevation a machine head constructed according
to this invention, the parts being arranged for drilling hexagonal holes.
Figure 2 is a plan corresponding to Figure 1 but with the slotted plate for
adjusting the dies removed.
Figure 3 is a plan of the slotted plate detached and Figure 4 is a horizontal
section on the line 1-2 Figure 1.
Figure 5 is an elevation partly in section of the slide or head carrying the spindle
or tool holder when arranged to receive a parallel movement.
Figure 6 is a plan of the die holder and Figure 7 a section on the line 3-4
Figure 5.
Referring to Figures 1 to 4. A is the spindle or tool holder provided at a with
a squared or flat surface or surfaces to slide in an opening b formed in a toothed
wheel C by which the spindle is driven from any suitable motor. The wheel C is.
formed with a boss c and an annular recess c in which recess is inserted the lower
end of the collar piece D forming part of or attached to the head stock of the
machine the wheel C being secured to the said collar piece D by a collar or ring d
screwed onto or otherwise secured to the upper end of the boss c and engaging in
an annular recess formed in the collar piece D. On the collar piece D is a
plate E provided with radial slots or guides e in which slide dies F which in
combination with an antifriction wheel or pulley G carried on the upper end of the
spindle A govern the shape and size of the holes to be drilled. The dies are
adjusted and held in position in the slots or guides e by a cover plate H having
therein concentric slots through which and through slots in the dies F pass
screws g which screw into the plate E and collar piece D and admit of the cover
plate H being turned axially relatively to the plate E. In the plate H are also
provided inclined or tangential slots h which receive the ends of studs i carried by
the dies F so that by moving the plate H through a partial rotation around its axís
the inclined slots acting on the studs i will cause the dies F to be moved nearer to
or further from the axis of the head according to the direction in which the plate H
is turned. Of course the slots raay be in the dies and the pins in the plate H if
so desired.
Projecting from the underside of the wheel C is a lug I against which bear
springs as at K the opposite ends of the springs bearing against a bar or frame L
connected to the spindle A by a screw M and adjusted in position by nuts k to
regulate as required the pressure of the springs K which tend to move the spindle A
in the slot 6 so that the pulley G comes into contact with the dies F.
With the spindle in the position shewn in Figure 1 round holes will be drilled,
as the pulley G will be held out of contact with the dies F but by screwing the
screw N out from the spindle A the springs K will operate as aforesaid to move
the pulley G into contact with the dies and thereby cause the drilling tool
carried by the spindle to drill holes with sides or angles corresponding to the dies
employed. If it be desired to prevent sharp angles being formed in the hole the
head of the screw N may be adjusted so that when the pulley G is passing from

page_text: one die to another the head of the said screw by coming into contact with the lug I
prevents the drill spindle from moving too far by the power of the springs K so
that while the pulley is passing from one die to another the drill will round the
-angles or corners of the hole. The spindle A is provided with a spherical pro-
jection A by which it is mounted in a corresponding bearing in the drill frame so
as to admit of the spindle inclining in any direction after the manner shewn in
Messrs. Tyler and De Vesian's aforesaid Specification.
If the spindle is required to retain a vertical position while at work the guiding
arrangements herein before described will be duplicated and the spherical bearing
be dispensed with as shewn in Figures 5, 6 and 7.
e
In these figures A. is the spindle carrying the cutting tool which spindle has flat
or square surfaces a fitting corresponding slots or openings b in the ends of a
rotating outer spindle or sleeve e the spindle A being rotated with the said spindle
or sleeve c by the wheel C. At each end of the spindle A is a washer or plate.
to prevent the spindle A from moving endways in the sleeve c. The plates e are
fastened to the spindle A and have each a lip e¹ projecting within the slots or
openings in the ends of the spindle or sleeve c. Against this projection el
springs K bear and act to press the wheels or pulleys G on the spindle A against
the dies F. These dies of which four are shewn for each end of the spindle have
inclined slots in them and are covered by plates, H having pins i projecting into
the slots h so that when the plates H are moved round, the dies F are drawn in or
out according to the direction in which the plates H are moved and thereby
regulate the size of the holes to be drilled. The springs K are contained within
the ends of the spindle or sleeve c as are also the screws M for holding the
spindle off the dies F.
Although we have referred to the formation of holes it is evident that by
properly arranging the tool the machine will operate upon and true external
surfaces as is made clear in the aforesaid Specification No. 3850*0.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
-
1. In machines for boring or drilling variously shaped holes and for shaping or
trueing the exteriors of nuts or for analogous operations, adjustable guides or
surfaces against which a roller mounted on the tool carrying spindle is caused to
bear and thereby cause the tool to deviate from a circular path at any desired
number of points and to any required extent corresponding to the shape or
configuration of the hole to be drilled or the surface to be shaped substantially as
herein before described.
2. In machines of the kind referred to adjustable guiding surfaces, templates or
dies adjustable in grooves or guides and capable of being readily removed in order
to vary as required the number employed in accordance with the number of angles
or sides in the figure to be described by the cutting tool substantially as herein-
before described.
3. In a machine of the kind referred to guiding plates or dies adjustable in
grooves or guides and a slotted plate for operating on the guiding plates or dies to
adjust them in position to vary as required the size of the hole to be formed or the
surface to be shaped by the cutting tool substantially as hereinbefore described.
4. The combination and arrangement of parts constituting improvements in
apparatus for drilling or boring variously shaped holes and for shaping or trueing
surfaces substantially as hereinbefore described and illustrated by Figures 1 to 4,
and Figures 5, 6 and 7 of the accompanying drawings.
Dated this 12th day of June 1893
J. H. JOHNSON & 'Co.,
Agents.