IMPROVEMENTS IN MACHINERY AND APPARATUS FOR " BORING
Year: 1871

page_text: LETTERS PATENT to William Sumner and Eric Hugo Waldenström,
both of Manchester, in the County of Lancaster, Engineers, for
the Invention of " IMPROVEMENTS IN MACHINERY AND APPARATUS FOR
"
BORING"
Sealed the 5th January 1872, and dated the 24th July 1871.
.
PROVISIONAL SPECIFICATION left by the said William Sumner and
Eric Hugo Waldenström at the Office of the Commissioners of
Patents, with their Petition, on the 24th July 1871.
We, WILLIAM SUMNER and ERIC HUGO WALDENSTRÖM, both of Man-
chester, in the County of Lancaster, Engineers, do hereby declare the
" IMPROVEMENTS IN MACHINERY AND
nature of the said Invention for
APPARATUS FOR BORING," to be as follows:-
This Invention consists in the method of employing the boring tool
for which former Letters Patent were granted to us on the 24th day of
December 1869, No. 3726.
Our present Invention is not only applicable for boring copper, and
its alloys, but it may be used for boring other metals and materials.

page_text: Our Invention consists in the application of a current of water, or
other liquid under pressure passing through the centre of the spindle
and boring tool, so as to keep them cool and to remove the borings.
The speed and production of the machine can thus be increased without
injuring the boring tool. The other parts of the boring machinery are
made in the ordinary manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Sumner and Eric Hugo Waldenström in
the Great Seal Patent Office on the 20th January 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
SUMNER and ERIC HUGO WALDENSTRÖM, both of Manchester, in the
County of Lancaster, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of July, in the year
of our Lord One thousand eight hundred and seventy-one, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said William Sumner and Eric Hugo
Waldenström, Her special licence that we, the said William Sumner
and Eric Hugo Waldenstrom, our executors, administrators, and assigns,
or such others as we, the said William Sumner and Eric Hugo Walden-
ström, 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 AND APPARATUS FOR BORING," upon the con-
dition (amongst others) that we, the said William Sumner and Eric
Hugo Waldenström, our executors or administrators, by an instrument
in writing under our, or their, or one of our or their hands and seals,
should particularly describe and ascertain the nature of the said Inven-
tion, 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 William Sumner and Eric Hugo
Waldenström, do hereby declare the nature of our said Invention, and

page_text: in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement (that is to say) :-
This Invention consists in the method of employing the boring tool for
which former Letters Patent were granted to us on the Twenty-fourth day
of December One thousand eight hundred and sixty-nine, Number 3726.
Our present Invention is not only applicable for boring copper and
its alloys, but it may be used for boring other metals and materials.
Our Invention consists in the application of a current of water or
other liquid under pressure, passing through the centre of the spindle
and boring tool, so as to wash out the borings produced, which other-
wise would clog the drill, and also to prevent the tool from heating.
The speed and production of the machine can thus be increased without
injuring the boring tool.
And in order that our Invention may be fully understood and readily
carried into operation, we will proceed to describe the two accompanying
Sheets of Drawings, reference being had to the figures and letters marked
thereon.
Fig. 1 is an elevation partly in section of our improved machinery
and apparatus for boring; Fig. 2 is a plan; Fig. 3, an end view; and
Fig. 4, a transverse section of the same.
a is the crown drill similar to that described in the Specification of
former Letters Patent granted to us on the Twenty-fourth day of
December One thousand eight hundred and sixty-nine, Number 3726;
this crown drill is rivetted to the tube b, which is connected by metal
The centre bar with the tube
straps and pins to the centre bar c.
and drill are caused to revolve rapidly with the hollow spindle d,
which is driven from a pulley on a countershaft, the strap from which
passes round the fast pulley e; the bar c is connected to the hollow
spindle d by the key f fixed to the bar and fitting in a groove in the
hollow spindle which revolves in the bearings 9, 9, fixed to the bed h.
The copper ingot or other article to be bored marked i is supported
in the blocks j, which can be moved up and down in the stands k
fixed to the bed h by the screws 1, worm wheels m, worms n, and hand
wheels or other equivalents; by this means the centre of the article to
be bored can be brought in a line with the centre of the boring tool.
The article to be bored is held by the bridles ¹, which are jointed to
the stands k. The boring tool is caused to advance towards and into

page_text: the article to be bored by means of the rack p, which is driven from the
hollow spindle d in the following manner :-The worm d' fixed on
the hollow spindle gears into the wheel r, which is keyed on the same
shaft as the bevel pinion ¹ gearing into the wheel s¹ which is loose
on the side shaft s, but connected to it when required by the sliding
clutch box s³, to the side shaft s is fixed the worm gearing into the
wheel t, which is fixed on the same shaft as the pinion t¹ gearing into
the rack p. It is evident that the advance of the boring tool can be
varied according to the nature of the article to be bored, by altering
the number of teeth in the wheels and pinions, which transmit the
motion from the hollow spindle d to the rack p. The rack p is con-
nected to the centre bar c by the head p¹ screwed to the end of the
rack; this head fits in a recess in the end of the bar c and is held
in position by the cap c¹ screwed to the end of the bar c, the metal
washers c² are placed between the head p¹, and the end of the recess in
the bar c, and they are lubricated through the oil holes shewn to reduce
the friction of the pressure of the head p¹ when forcing the boring
tool forward. The water under pressure or other liquid for clearing
away the borings, and for preventing the heating of the boring tool is
supplied through the pipe x which passes through the rack p and through
the centre bar c and is supplied by the pipe x¹ which is furnished with
a stop-cock. The rod u and strap fork are for moving the driving
strap from the fast to the loose pulley, and the rod w and lever y are
to throw the sliding clutch box s² in and out of gear.
When the boring
tool has pierced through the ingot or other article the attendant stops
the machine and shuts the tap in the pipe x', he then removes the plug
or bar of metal which is cut out by the boring tool, and throws the
clutch box s² out of gear, then by turning the hand wheel on the shaft s
he causes the pinion t¹ to move the rack p back, thereby drawing the
boring tool out of the ingot or other article, he then loosens and
throws back the bridles k¹ to release the bored out ingot or other article,
which is removed and a solid one put in its place, after which the
boring tool is brought forward again till it touches or nearly touches
the end of the ingot or other article, and when the machine is started
it continues its work automatically until the boring tool is again
through.

page_text: be understood that we do not intend to limit ourselves to the details
given, but what we claim is,—
First. The improved method of employing the crown boring tool above
referred to as shewn and described.
Secondly. Forcing water or other fluid under pressure into the interior
of a crown boring tool for the purposes described.
And, lastly. The general arrangement of the machinery and appa-
ratus for boring as shewn and described.
In witness whereof, I, the said Eric Hugo Waldenström for myself
and on behalf of the said William Sumner, have hereto set my
hand and seal, this Nineteenth day of January, One thousand
eight hundred and seventy-two.
ERIC HUGO WALDENSTRÖM. (L.S.)