IMPROVEMENTS MACHINERY FOR BORING SHAFT COUPLINGS, AND APPLICABLE FOR BORING CIRCULAR OR OTHER FLANGES
Year: 1872

page_text: LETTERS PATENT to John Tannett, of Leeds, in the County of York,
John Scott, the youngest, of Greenock, in the County of Renfrew,
and John Craven, and Samson Fox, of Leeds, in the County of
York, all Engineers, for the Invention of "IMPROVEMENTS
MACHINERY FOR BORING SHAFT COUPLINGS, AND APPLICABLE FOR BORING
CIRCULAR OR OTHER FLANGES."
IN
Sealed the 27th August 1872, and dated the 2nd March 1872.
PROVISIONAL SPECIFICATION left by the said John Tannett, John
Scott, John Craven, and Samson Fox, at the Office of the Com-
missioners of Patents, with their Petition, on the 2nd March 1872.
We, JOHN TANNETT, of Leeds, in the County of York, JOHN SCOTT,
5 the youngest, of Greenock, in the County of Renfrew, and JOHN
CRAVEN, and SAMSON Fox, of Leeds, in the County of York, all
Engineers, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY FOR BORING SHAFT COUPLINGS, AND APPLICABLE

page_text: FOR BORING CIRCULAR OR OTHER FLANGES," to be as follows, that is to
say :-
This Invention has for its object to obtain machinery capable of boring
shaft couplings whilst the two shaft lengths to be coupled are in juxta-
position, so that the boring of each bolt hole may be continued through
both discs or flanges without shifting the shafts, whereby perfect coin-
cidence of the holes is secured in the simplest manner. To effect this
the boring has to commence at what is the outer side of one of the
coupling flanges when the two flanges are united; and it will be obvious
that machinery capable of getting access to the flanges in this way will
be equally applicable for boring various circular or other flanges under
similar circumstances.
The improved machinery comprises the various parts usual in existing
boring machines, and simple steam engine details are by preference fitted
on the same framing, whilst an engaging and disengaging clutch is pro-
vided for throwing the crank shaft out of gear, and a pulley is fitted on one
of the shafts to receive a driving belt when it may be more convenient
to drive the machinery in that way. The bevil gearing and back
motion gearing usually fitted upon or in immediate connection with the
boring spindle are applied in connection with a shaft that is parallel to
the boring spindle, and a spur wheel on the parallel shaft gears with a
pinion formed on a tubular piece through which the boring spindle
passes. The pinion is made as small as possible, and by preference of
steel or gun metal, and the caps of the bearings in which the boring
spindle and tubular pinion piece revolve are made of brass, steel, or gun
metal so as to dispense with separate bushes, and so as to project to the
least possible extent, and thus admit of the boring spindle being placed
as close to the body of the shaft as may be required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Tannett, John Scott, John Craven and 3
Samson Fox, in the Great Seal Patent Office on the 31st August
1872.

page_text: of Greenock, in the County of Renfrew, and JOHN CRAVEN and SAMSON
Fox, of Leeds, in the County of York, all Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of March, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said John Tannett, John Scott, John
Craven, and Samson Fox, Her special licence that we, the said John
Tannett, John Scott, John Craven, and Samson Fox, our executors,
administrators, and assigns, or such others as we, the said John Tannett,
John Scott, John Craven, and Samson Fox, our executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY FOR
BORING SHAFT COUPLINGS, AND APPLICABLE FOR BORING CIRCULAR OR OTHER
FLANGES," upon the condition (amongst others) that we, the said John
Tannett, John Scott, John Craven, and Samson Fox, our executors or
administrators, by an instrument in writing under our, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that we, the said John Tannett, John Scott, John
Craven, and Samson Fox, do hereby declare the nature of our said
Invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following state-
ment in writing, reference being had to the accompanying Drawings,
that is to say :—
Our said Invention has for its object the constructing of machinery
capable of boring shaft couplings whilst the two shaft lengths to be
coupled are in juxtaposition, so that the boring of each bolt hole may be
continued through both discs or flanges without shifting the shafts,
whereby perfect coincidence of the holes is secured in the simplest
manner. To effect this the boring has to commence at what is the

page_text: outer side of one of the coupling flanges when the two flanges are
united; and it will be obvious that machinery capable of getting access
to the flanges in this way will be equally applicable for boring various
circular or other flanges under similar circumstances.
And in order that our said Invention and the manner of performing &
the same may be properly understood, we hereunto append two Sheets
of explanatory Drawings, to be herein-after referred to, and representing
two modifications of our improved machinery, as arranged for boring
shaft couplings. In these Drawings the same reference numerals are
used to mark the same or like parts wherever they are repeated, and the 1
positions of the shafts, the couplings of which are to be bored, are
indicated by dotted blue lines.
Figure 1 on Sheet 1 of the Drawings is a plan of a modification of our
improved coupling boring machine, having the engine for driving it upon
the same framing, and Figures 2 and 3 are elevations at right angles to 1
each other, corresponding to Figure 1.
The improved machinery comprises the various parts usual in existing
boring machines, which, with simple steam engine details, are carried on
a massive horizontal cast-iron bed frame 1, 2, 3, 4.
The engine details may be variously arranged, but in this example 2
comprise a single horizontal cylinder 5, bolted down to the bed frame,
and driving a crank shaft 6, provided with a fly wheel-7, and carrying a
pinion 8, which gears with a spur wheel 9 on a second motion shaft 10.
A bevil pinion 11 on the shaft 10 drives a bevil wheel 12, which
actuates a spur wheel 13 either directly or through the usual back 2
motion gearing, these parts not being on and in connection with the
boring spindle 14, as in ordinary machines, but on and in connection
with a horizontal shaft 15, that is, parallel to the boring spindle 14, and
is carried in housings or standards 16, cast on the bed frame. The spur
wheel 13 on the parallel shaft 15 gears with a pinion 17 formed on a 3
tubular piece 18, through which the boring spindle 14 passes, and to
which it is connected by a groove and key allowing it to move
longitudinally. This pinion, with the tubular piece 18, is made as
small as possible, and, by preference, of steel or gun metal, and is held
between the housings 16, which are formed with bearings for the boring 3
spindle 14 to revolve in. The caps 19 of these bearings are made of
brass, steel, or gun metal, so as to dispense with separate bushes, and so

page_text: as to project to the least possible extent; and this arrangement admits of
the shaft, the coupling of which is to be bored, being placed as close to
the boring spindle 14 as may be required.
The feeding details and other accessories in connection with the
boring spindle are not materially different from those of existing
boring machines, and need not therefore be minutely described.
Carrying blocks 20, 21, with angular sides, are provided for holding
the shaft, the couplings of which are to be bored. One of these, 20, is
made adjustable horizontally on a part 1 of the bed frame prepared for
the purpose. The other block 21 is also adjustable horizontally, but
upon a movable table 22, which latter is adjustable vertically by means
of a screw 23. The bed frame is formed with a faced flange or plate 24,
projecting downwards for the rising table 22 to be bolted to, and a
horizontal flange 25 formed at the bottom of the vertical flange 24
sustains the screw 23. The application of the rising table 22 makes the
machine suitable for boring various kinds of work when it may not be
occupied with shafting.
Figures 4 and 5 on Sheet 2 of the Drawings are respectively a plan
and an end elevation of a modification of our improved machinery, which
differs from that shown in Sheet 1, and herein-before described, simply
in being arranged to be driven by a belt instead of by a special engine
on the same bed frame, and in having the second motion shaft parallel
instead of at right angles to the boring spindle 14 and parallel shaft 15,
to which last it is geared by spur instead of bevil wheels.
The modification shown on Sheet 1 may be provided with clutch
details and belt pulleys, admitting of the crank shaft being thrown
out of gear, when it may happen to be more convenient to drive the
machinery by a belt.
In both modifications the boring spindle is shown in a horizontal
position, this being the most convenient position when the machine is
intended for boring the couplings of heavy shafts; but it is obvious that
the machine may be arranged with the boring spindle in a vertical or
inclined position when thought more suitable for the work intended to
be performed.
Having thus particularly described our said Invention, and the
manner in which the same is to be performed, we have to state that

page_text: we do not restrict ourselves to the precise details herein described or
delineated, but that what we believe to be novel and original, and
claim as the Invention secured to us by the herein-before in part
recited Letters Patent is, the adapting of machinery for boring shaft
couplings and circular and other flanges in the improved manner herein
described or delineated, or substantially so.
In witness whereof, I, the said John Tannett, on behalf of myself
and of the said John Scott, John Craven, and Samson Fox, have
hereunto set my hand and seal, this Thirtieth day of August, in
the year of our Lord One thousand eight hundred and seventy-
two.
JOHN TANNETT. (L.S.)