Improvements in Machines for Drilling or Boring Variously Shaped Holes, applicable also for Shaping or Trueing the Exteriors of Nuts, or for analogous operations.
Year: 1891

page_text: Date of Application, 26th June, 1891
Complete Specification Left, 8th Oct., 1891-Accepted, 25th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Machines for Drilling or Boring Variously Shaped
Holes, applicable also for Shaping or Trueing the Exteriors of
Nuts, or for analogous operations.
We, ALFRED HUGH TYLER and JOHN STUART ELLIS DE VESIAN both of
the firm of Tyler & Ellis of 5 Crown Court, Cheapside, in the City of London
Engineers do hereby declare the nature of this invention to be as follows:-
Our invention relates to machines wherein a tool carrying spindle is caused by
means of a template to have movement corresponding to the shape to be cut or
trued. Our invention is intended more especially for application to a machine such
as is described in the Specification of Letters Patent No. 3850 of 1890 granted to
us and we will describe it in connection therewith although it may also be applied
to machines otherwise constructed.
According to our present invention the tool is not carried in an internal tool
spindle vertically adjustable in an outer spindle but is secured in the lower end of
the outer spindle. This outer spindle is hollow and contains an internal spindle
which can be adjusted vertically in the outer spindle and carries the roller which
runs against the template. The said roller is made of conical shape and by
adjusting the internal spindle, carrying it, vertically relatively to the outer spindle
and template a portion of the conical roller of lesser or greater diameter is brought
opposite the template and consequently the tool describes a figure corresponding to
the template but varying in size according to the position of the roller and internal
spindle carrying it. The vertical adjustment of the internal spindle and roller can
be effected in any convenient way for instance by a spring pressing the spindle
upwards against an adjusting screw bearing upon a suitably formed bearing surface
on the upper end of the spindle so that by turning the screw in one direction the
spring forces the internal spindle and roller upwards and by turning the screw in
the other direction the spindle and roller are forced down against the upward
pressure of the spring. Or the inner spindle may be dispensed with and the conical
roller be carried upon the upper part of the tool spindle the whole spindle being
moveable vertically by a screw or other means acting upon the spherical bearing or
the template may be made capable of being raised and lowered upon a slide
relatively to the spherical joint. The invention is not limited to a tool carrier
having an oscillating movement about a centre but may be applied to one having a
parallel motion and to obtain this motion instead of the lower guide or guides or
spherical bearing at the lower end of the tool carrier the upper arrangement of
template, roller and means for keeping the roller in contact with the template may
be repeated below in place of the said guides or spherical arrangement.
71
ليوم
1
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1001
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Machines for Drilling or Boring Variously Shaped
Holes, applicable also for Shaping or Trueing the Exteriors of
Nuts, or for analogous operations.
We ALFRED HUGH TYLER and JoHN STUART ELLIS DE VESIAN both of
the firm of Tyler and Ellis of 5 Crown Court Cheapside in the City of London
Engineers do hereby declare the nature of this invention and in what manner the

page_text: same is to be performed to be particularly described and ascertained in and by
the following statement :-
Our invention relates to machines wherein a tool carrying spindle is caused by
means of a template to have movement corresponding to the shape to be cut or
trued. Our invention is intended more especially for application to a machine such
as is described in the Specification of Letters Patent No. 3850 of 1890 granted to
us and we will describe it in connection therewith although
may also be applied
to machines otherwise constructed.
According to our present invention the tool is not carried in an internal tool
spindle vertically adjustable in an outer spindle but is secured in the lower end of
the outer spindle. This outer spindle is hollow and contains an internal spindle
which can be adjusted longitudinally in the outer spindle and carries the roller
which runs against the template. The said roller is made of conical shape and by
adjusting the internal spindle, carrying it, longitudinally relatively to the outer
spindle and template a portion of the conical roller of lesser or greater diameter as
required may be brought opposite the template and consequently the tool is caused
to describe a figure corresponding to the template but varying in size according to
the position of the roller and internal spindle carrying it. The longitudinal
adjustment of the internal spindle and roller can be effected in any convenient way;
for instance, by a spring pressing the spindle upwards against an adjusting screw
bearing upon a suitably formed bearing surface on the upper end of the spindle so
that by turning the screw in one direction the spring forces the internal spindle and
roller upwards and by turning the screw in the other direction the spindle and
roller are forced down against the upward pressure of the spring. Or the inner
spindle may be dispensed with and the conical roller be carried upon the upper part
of the tool spindle the whole spindle being moveable vertically by a screw or other
means acting upon the spherical bearing, or the template may be made capable of
being raised and lowered upon a slide relatively to the spherical joint. The
invention is not limited to a tool carrier having an oscillating movement about a
centre but may be applied to one having a parallel motion and to obtain this
motion instead of the lower guide or guides or spherical bearing at the lower end
of the tool carrier, the upper arrangement of template, roller and means for keeping
the roller in contact with the template may be repeated below.
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 annexed drawings the same letters of reference indicating corresponding parts
in all the figures.
Figures 1 and 2 are vertical sections at right angles to each other of so much of
our improved machine as is necessary to illustrate our invention. Figure 3 is a
plan and Figure 4 an underside view of the same.
A is the tool carrying head fitted to slide in suitable grooves on the standard or
framing B and capable of being moved towards and from the work by a screw C
working in a nut or internally screwed bush D carried in a socket E in the
head A.
The screwed bush D is turned in the socket by means of gearing F operated by
a hand wheel G by turning which wheel in one direction or the other the head A
may be raised or lowered as required. The drill or cutting tool H is secured in
the lower end of the hollow spindle I by a fixing screw K and is preferably
arranged with its cutting edge in the axial line of the spindle. This spindle is
formed with a spherical part L mounted in a correspondingly formed bearing or
socket M in a projection N from the head A.
Fitted to slide longitudinally but not to turn in the hollow spindle I is a rod or
spindle O carrying a conical roller P which is free to turn on the spindle and bears
against a template Q which may be secured to projections R on the upper projecting
part S of the head A. by clips T as shewn or by any other convenient means so as
to admit of being rotated when desired. The spindle O and conical roller Pare

page_text: pressed upwards by a spring U contained in the hollow spindle I and bearing
against a shoulder on the spindle O. The distance to which the spindle and roller
are permitted to rise under the action of this spring U is governed by a screw V
the end of which bears upon a plate or projection W on the top of the spindle O.
The screw works in a nut or internal screw thread formed in the boss of a spur
wheel X carried between jaws Y of a bracket Z secured to the head A..
In gear with the wheel X is another wheel a fast on a vertical shaft or spindle >>
working in bearings c and provided with a handle or hand wheel d by turning which
wheel in one direction or the other the wheels X and a may be caused to rotate and
thereby raise or lower the screw V so as to admit of the spindle O with the conical
roller Prising more or less as required under the action of the spring U. The
screw V may be prevented from turning with the wheel W by any known or con-
venient means such for example as by a feather in the jaws of the bracket entering
a slot or key-way provided in the screw. The spindle I is rotated from a vertical
shaft e driven by any suitable prime mover this shaft carrying a pinion gearing
with a spur wheel fast on or formed in one with a collar
g
fitted to turn in a
socket in the projecting part S of the head A. The conical roller P is held in
contact with the template Q by springs as shown in Figure 7 hereinafter
referred to.
When the smallest diameter of the roller P is in position to bear against the
template Q the largest hole for which the machine is made will be drilled in the
work but by raising the screw V more or less the spindle with the conical roller
will rise under the action of the spring U so as to bring a part of the said roller of
larger diameter to bear on the template whereby holes of smaller size but of the
same shape may be drilled.
By raising the screw V so as to admit of the roller P being jammed by the
spring U into the template the spindle O will rotate in the roller like the journal
of an ordinary drill spindle and drill round holes in the work. The template is
preferably made circular on the exterior and provided with teeth with which gears
a worm carried in bearings and provided with a handles by means of which the
template may be rotated on its support when required.
The roller Pinay be kept out of contact with the template when required by a
screw screwing into the lug on the wheel y and bearing at its inner end against
the spindle I.
Instead of the drill H for boring or drilling holes as described a suitably formed
tool may be secured in the spindle I to act on external surfaces such for example
as on nuts for bolts, bolt heads and the like and for shaping or truing other
surfaces.
The template Q may be readily removed and replaced by another of different
form to suit the shape of the holes to be drilled or the articles to be shaped.
Instead of raising and lowering the conical roller to vary the size of the holes to be
drilled the roller may if desired be mounted directly on the tool holding spindle I
and be maintained at a fixed height relatively to the spherical bearing, and the
template be adjusted in position relatively to the roller as shewn in Figure 5 in
which figure the template Q is shewn as being secured to a bracket S¹ fitted to
slide in guides in the head A and operated by means of a screw V2 mounted in a
bearing and working in an internal screw thread provided in a lug 2 on the
bracket S. Or the spindle I together with the spherical bearing L in which it
oscillates may be adjustable in height on the head A so as to vary the size of the
holes to be drilled by altering the distance between the template Q and the conical
roller P carried on the spindle. For this purpose the spherical bearing may be
carried in a bracket N as shewn in Figure 6 fitted to slide in guides on the head A
and capable of being raised and lowered as required by means of a screw V2 working
in an internal thread in a lug n on the bracket N.
Figure 7 shews an arrangement for giving to the tool a parallel movement instead
of an oscillating movement as hereinbefore described, the spherical bearing L in

page_text: this case being dispensed with and the spindle 1 being fitted at its lower end with
an additional conical roller P arranged to bear against a template Q² which is the
same shape and size as the template Q. The spindle I is rotated by means of
gearing as in the arrangements before described and the rollers P P2 are held in
contact with the templates QQ by springs p surrounding rods or spindles n² carried
by frames through which the spindle passes. The frames are fitted to slide
between lugs or projections on the wheels g g² and the springs p bear at one
end on lugs or projections 3 on these wheels and at their opposite end against
nuts on the rods or spindles a so that they tend to force the frames in the
direction to cause the rollers P P to press against the templates and follow the
contour thereof as the spindle rotates the said spindle being caused to move in a
parallel direction and thereby drill holes in shape corresponding to the said
templates.
Having now described and particularly 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―
,"
1st. In machines for the purpose mentioned a tool holding spindle having a
variable oscillating motion given to it by a template acting on a conical roller the
said roller or the template or both being capable of being adjusted in position
relatively to each other so as to bring a greater or lesser diameter of the conical
roller opposite the template according to the size of holes required to be drilled or
the size of the articles to be trued or shaped substantially as hereinbefore
described.
2nd. In machines for the purposes mentioned a tool holding spindle having given
to it movements in a direction at right angles to its axis by means of duplicate
templates and rollers arranged substantially as hereinbefore described with reference
to Figure 7 of the accompanying drawings.
3rd. In a machine for the purpose mentioned the combination with a tool holding
spindle a template and an adjustable conical roller for giving oscillating motions to
the spindle of a spring and a screw for adjusting the position of the roller relatively
to the template substantially as and for the purpose hereinbefore described.
4th. The combinations and arrangements of parts constituting mechanism for
drilling or boring square or other shaped holes and for shaping or trueing the
exterior of nuts or for analogous purposes substantially as hereinbefore described
and illustrated severally by Figures 1 to 4, Figure 5, Figure 6 and Figure 7 of the
accompanying drawings.
Dated this 8th day of October 1891.