Improvements in or connected with Drilling, Boring, and Rimering Machinery.
Year: 1899

page_text: Date of Application, 3rd May, 1899
Complete Specification Left, 5th Feb., 1900-Accepted, 24th Mar., 1900
PROVISIONAL SPECIFICATION,
5 Improvements in or connected with Drilling, Boring, and Rimering
Machinery.
I, THOMAS ANDERSON, of 3, Derby Road, Liverpool, in the County of Lancaster,
Consulting Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to machinery for boring, drilling, and rimmering;.
and it has mainly for its object to provide a machine of this type, by which
holes may be bored, drilled, or rimmered in flanges, rapidly, and with ease and
truth. The invention has also reference to the operation of machinery, as
hereafter described, by means of electrical (or equivalent convenient and handy)
power motors for working such machines. .
As an application of the invention, it may be employed with great advantage
in the boring out of holes in shaft coupling flanges for the reception of the
coupling bolts; and in the case of large shafts, such as exist on large steam-
ships, it is adapted also to bore these holes on a true taper throughout, for the
reception of the tapered fastening bolts employed; and for convenience of des-
cription, the invention will be described as applied to the boring out of such
holes in the coupling flanges or collars of the crank or propeller shaft lengths.
A machine according to this invention, adapted for the latter purpose, com-
prises a frame or saddle adapted to fit on or over the two flanges of the shaft
coupling, and is adjustable thereon both radially and longitudinally, and fixed
in the position when found, by stud bolts or the like, adapted to engage. the
sides of the flanges, and edges; and there is also provided, in some cases, in con-
nection with it, bolts and nuts at each edge, to which a chain or the like is
attached, which passes round the flanges or shaft, and by which an additional
fastening is provided. This frame or saddle projects at either side beyond
the flanges, and is provided at each of these parts with a bearing; and in these
bearings a boring bar, for supporting the cutting or boring tool is disposed and
works. This bar is hollow and carries within it a threaded rod; and carries also
a tool holder, through which the said rod. passes. And this threaded rod is
rotated through a star wheel, or the like, on a transverse spindle, passing through
the hollow end or head on the bar, and through a bevel wheel thereon, and one
on the tool shaft; the star wheel being actuated by a fixed stud or projection on
the frame, with which its arms come in contact as the whole boring or cutter
bar revolves and works. By this means the tool is fed longitudinally along
the bar.
The bar is arranged eccentrically in its bearings, so that the tool travels in
an angular direction in relation to the axis of the holes, that is, non-parallel
with such axis, so as to give a tapered bore or cut; and this may be adapted
to take place in either direction, by causing the tool holder to receive a tool at
either side, and by having a changeable stud adapted to cause the star wheel
spindle to revolve, and turn the tool holder actuating shaft in either direction.
For setting the machine in position, when fitting a new length of shaft to an
old, one, a true cylindrical shaft is placed in the bearings of the machine, and

page_text: a ring in it is moved into the existing bolt hole of the flange, and 'when this
ring touches and fits this hole, then the axis of the bearings are in the true posi-
tion; whereupon the frame or saddle is fixed in position by its screw studs, and
fastenings. After this, the parallel shaft is taken out and the eccentrically
arranged boring bar is introduced into the bearings. The bearings may be
provided with bushes formed to suit the different boring bars, and bars con-
structed to bore or cut with differing tapers.
The driving of the boring bar is effected through an electric motor (or an
equivalent portable motor) which operates a worm and shaft carried in bearings,
and a worm wheel on the boring shaft, through which gear, a suitable slow and
reduced rate of revolution of the boring bar is obtained. And this worm sup-
porting shaft is mounted by brackets upon a head or carrier which may be fitted
round the bearing, and adapted to be adjusted circularly about the axis of the
boring bar, and fixed in any position, so that this worm and shaft may be dis
posed in relation to the work of the motor in the most convenient position.
This worm shaft may have a universal joint jaw on it, and may be coupled to
a motor through a length of shaft with suitable universal joints, at the machine
end and motor end. At the motor end, this shaft may be revolved through
reducing tooth gearing from the armature of the motor.
The frame bearings for the boring shaft, at one end, may be provided with a
bush fitted endwise into the bearing, and fastened by bolts, and of such size
externally, that when removed end wise, the whole boring bar can be passed
into position, and taken out through it, as and when required.
It is to be stated that the invention is not restricted to the particular form
or construction of the parts described, nor is it restricted to all the parts referred
to in combination and in its application to different purposes and forms of
parts to be operated upon by it, it will be modified as to form, and in any other
necessary respects, to suit. or meet such differing or varying conditions and
purposes.
Dated this 2nd day of Ver 1800
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.
Improvements in or connected with Drilling, Boring, and Rimering
Machinery.
I, THOMAS ANDERSON, of 3, Derby Road, Liverpool, in the County of Lancaster,
Consulting 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:-
This invention has reference to machinery for boring, drilling, and rimmering;
.and it has mainly for its object to provide a machine of this type, by which
holes may be bored, drilled, or rimmered in flanges rapidly, and with ease and
fruth.
As an application of the invention, it may be employed with great advantage
in the boring out of holes in shaft coupling flanges, for the reception of the
coupling bolts; and in the case of large shafts, such as exist on large steam-
ships, it is adapted also to bore these holes on a true taper throughout, for the
reception of the tapered fastening bolts employed; and for convenience of des-
cription, the invention will be described as applied to the boring out of such
holes in the coupling flanges or collars of the crank or propeller shaft lengths.

page_text: coupling flanges of large shafts, such as ships' propeller shafts. Figure 2 is an
end outside view of the apparatus; and Figure 3-is a cross section at A A
Figure 1.
i
Referring to the drawings, the flanges of the shaft to which the apparatus is
applied and fixed for operating upon it, are shewn in dotted lines, and
marked a a. The frame or saddle which is connected to the couplings a as
hereafter described, is designated b; and from either end of this frame or saddle
are projecting parts c, d, carrying at their ends, the brackets e and f, respectively.
The brackets e and f support or carry the boring bar and other moving parts
of the apparatus, and these I will now describe.
h is the boring bar proper carrying the tool holder i. This bar h has a slot or
opening through it, and extending through this slot, and through a part of the
tool holder 2, a threaded rod j passes; the hole of the tool holder passed through
by j being threaded so as to cause the holder to move longitudinally, when i
is rotated. The bar h at each end has separate journal pieces k, in the sockets
of which the ends of the bar h are fixed; and these parts & are mounted in bear-
ing sleeves and m-to which they are suitably fixed, which are supported in
the brackets e and f, respectively. These sleeves or bushes I m are bored
eccentrically and diagonally, to give the inclined position and desired movement
of the boring bar.
The boring bar is driven from one end by a worm », supported by a shaft n¹
in the bracket 2, which fits over a concentric flange on the bracket f, and a worm
wheel fixed on the sleeve or bush m outside the bracket f. When the worm n
is rotated by the shaft n', the worm wheel and the bushes m and revolve,
carrying bodily with them the parts and the shaft h, causing it to revolve
eccentrically, and at an inclination to the axis of the hole being bored.
With regard to the opposite end of the frame, the shaft carrier piece is pro-
vided on its outer end with a bracket », and it is hollow, and within the bore
there is fitted a shaft p, the inner end of which is recessed, and engages with
the squared end of the screwed rod j. The outer end of p is provided with a
bevelled wheel and the bracket supports the shaft o, having upon it a
bevel wheel, meshing with p and one end of the shaft outside the
bracket o, is provided with a star wheel device 03, which, through the stationary
rod. fixed on the frame c, is caused to revolve when the apparatus is in motion.
The action is, that by the rotation of the bar and the carrier k as above des-
cribed, the bracket revolves: and in each revolution an arm of the star o³
comes in contact with the rod g, and so rotates the shaft o, bevel wheels o²,
and, the spindle and the screwed rod j, and so moves forward the tool
carrier i.
Thus, the effect of these actions is, that as the bar his revolved axially and
bodily in an inclined direction around the axis of the hole to be bored, and the
tool holder is moved longitudinally by the feeding mechanism described, the
hole in the coupling flanges a is truly bored on the taper required.
To fit the apparatus in relation to the axis of the hole to be bored, in such
a manner that the position on the coupling flanges is that desired, namely, so
that the centres of the sleeves or bushes and m are parallel and concentric
with the axis of the hole to be bored, the saddle or frame is placed on the coup-
lings a, and a cylindrical shaft is placed in the bearings e and f: and in some
cases a ring on the shaft is moved on this into the bolt hole of the flange. Then
by adjusting the saddle, until the bar is central in the hole, or the ring fits and
touches the surface of the hole all round, the axes of the bearings will be in
their proper and true position, and the saddle or frame is fixed in position on
the coupling after which this temporary shaft is taken out, and the boring
bar h and sleeves or bushes 7 m are introduced in place, and the boring effected
as described.
In the transverse flanges or ribs of the saddle b, stud bolts are provided;

page_text: and in setting it, these stud bolts are screwed up and made to bear on the surface
or face of the coupling flanges a.. By this, the frame or saddle is set in relation
to the coupling flanges; and then it is further held and supported by chains
or the like which pass round the periphery of the flanges a, and which_arc
secured to eye-bolts, or the like, in flanges on the under side of the edges
of the saddle plate. It will be plain that by screwing up the nuts of these eye-
bolts, tension is put on the fastening chain, and the saddle will be drawn up
firmly and rigidly.
The boring bar h, as stated, has a longitudinal slot through it between the
ends which are carried in the end pieces ; and the tool holder i slides along
the slot. The tool holder shewn consists of a block comprised of two pieces,
cach having flanges at either side, which work on the edges of the bar on either
side of the slot and these two pieces are fastened together by screws, or
equivalent means. One end of the block is provided with a ring which
slides over the outside of the bar h, and prevents the halves of the bar springing
outwards when in action. The tool fits in a recess in one of the blocks, and is
secured in position by a set screw ¿.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
-
1. The herein described improvement in apparatus for boring and similar
purposes, namely, an apparatus comprising a frame adapted to be set on and
fastened to the parts to be bored, and having a boring bar supported in bear-
ings at each end, and so arranged and adapted as to cause a tool carried thereon
to be moved in an inclined direction in relation to the axis of the hole to be
bored as it is fed or moved longitudinally thereon; for the purposes set forth.
2. Apparatus for boring and similar operations, comprising a frame b adapted
to be secured to the parts to be bored, as described; and a boring bar h having
a tool holder i, the axis of which is in an inclined direction to the axis of the
hole to be bored, and carried in bearings at either end; "substantially as set
forth.
"
3. In apparatus for the purposes described, a frame adapted to be fastened
or secured to the part to be operated upon, having a boring bar h, and a bear-
ing at either end, the ends of which bar are supported in bushes or sleeves 1 m,
and the said bushes being mounted and adapted to revolve in said bearings; and
having their axes coincident; the ends of the shaft or part carrying the shaft
fitting in the bushes or bearings, being eccentric and at an inclination; sub-
stantially as set forth..
4. The herein described improvement in apparatus for boring and similar
purposes, comprising a frame or saddle adapted to be secured to the parts to be
bored, and having a bearing at each end for supporting a bar; for the purposes
set forth.
5. A boring apparatus of the kind herein referred to, having driving gear at
one end for operating the boring bar, and feeding mechanism at the opposite
end, connected with the boring bar and revolving therewith, and adapted to
actuate an inner threaded rod for operating the tool holder; substantially as
set forth.
6. The boring apparatus for boring and similar operations, having parts
arranged and constructed, and adapted to operate particularly as set forth with
reference to and shewn in the drawings.
101010
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.