IMPROVEMENTS IN BORING ROCKS AND IN THE APPARATUS EMPLOYED THEREFOR
Year: 1874

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company,
Patent Agency, of Frankfort-on-the-Main, in the Empire of
Germany, for the Invention of "IMPROVEMENTS IN BORING ROCKS AND
IN THE APPARATUS EMPLOYED THEREFOR."-A communication from the
Machines Manufacturing Company "Humboldt," of Kalk, near
Cologne, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the
Office of the Commissioners of Patents, with his Petition, on the
10th October 1874.
I, FRANK WIRTH, of the Firm of Wirth and Company, Patent
Agency, of Frankfort-on-the-Main, in the Empire of Germany, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
BORING ROCKS AND IN THE APPARATUS EMPLOYED THEREFOR," a communication,
to be as follows:-
Rock boring or drilling machines working with a reciprocating move*
ment or stroke as hitherto constructed require frequent repairs. I have

page_text: devised a rotary steel implement working under high pressure, and by
means of which hard rocks, as basalt and the like, can be bored without
any appreciable wasting of the bit of the said implement.
The following is a description of the said rotary boring implement,
reference being had to the drawing, of which.—
G
devised a rotary steel implement working under high pressure, and by
means of which hard rocks, as basalt and the like, can be bored without
any appreciable wasting of the bit of the said implement.
The following is a description of the said rotary boring implement,
reference being had to the drawing, of which,
Figure 1 is a longitudinal vertical section through the line a, b, of
Figure 5.
Figure 2, a horizontal cross section through the line c, d, of Figure 1.
Figure 3, a vertical longitudinal section through the line e, f, of
Figure 5.
Figures 4, 5, 6, are horizontal cross sections through the lines g, h,
i, k, and l, m, of Figure 1.
The boring bar n is connected to the steel implement o by means of
its square
end 9,
h. The boring bar and the steel implement are per-
forated by the holes p, through which the cooling water is carried to the 1
bit of the steel implement, the latter by this means is rendered cool and
clean from stone dust, which then through the grooves g arranged in the
circumference of the vessel recedes with the water to the upper part of
the bore hole.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 2
filed by the said Frank Wirth in the Great Seal Patent Office on
the 8th April 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANK
WIRTH, of the Firm of Wirth and Company, Patent Agency, of
Frankfort-on-the-Main, in the Empire of Germany, send greeting.
2
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of October, in the year of our Lord
One thousand eight hundred and seventy-four, in the thirty-eighth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Frank Wirth, Her special licence that I, the g
said Frank Wirth, my executors, administrators, and assigns, or such
others as I, the said Frank Wirth, my executors, administrators, and

page_text: 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 BORING ROCKS AND IN THE
APPARATUS EMPLOYED THEREFOR," a communication from the Machines
Manufacturing Company "Humboldt," of Kalk, near Cologne, in the
Empire of Germany, upon the condition (amongst others) that I, the
said Frank Wirth, my executors or administrators, by an instrument in
writing under my, 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 I, the said Frank Wirth, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying Drawing
forming a part of this Specification:-
Rock boring or drilling machines working with a reciprocating move-
ment or stroke as hitherto constructed require frequent repairs. I have
devised a rotary steel implement working under high pressure, and by
means of which hard rocks, such as basalt and the like, can be bored
without any appreciable wasting of the bit of the said implement.
--
The following is a description of the said rotary boring implement :-
Figure 1 is a longitudinal vertical section through the line a, b, of
Figure 5.
Figure 2 is a horizontal cross section through the line c, d, of
Figure 1.
Figure 3, a vertical longitudinal section through the line e, f, of
Figure 5.
Figure 4, a horizontal cross section through the line g, h, of Figure 1.
Figure 5, a
"
• "
Figure 6, a
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"
"
i, k,
""
"'
39°
1, m, 13
"
'">
39'
»
The boring barn is connected to the steel implement o by means of

page_text: forated by the holes p through which the cooling water is.carried to the
bit of the steel implement, the latter by this means is rendered cool and
clean from stone dust, which then through the grooves q (arranged in
the circumference of the vessel) recedes with the water to the upper
part of the bore hole.
Having now described the said Invention, what I claim and desire to
secure by Letters Patent is, the boring bar n and steel implement o per-
forated by the longitudinal holes p and connected with a conical steel
bit, the implement o being at the outer surfaces provided with grooves q,
all in the manner and for the purpose mentioned.
·
In witness whereof, I, the said Frank Wirth, have hereunto set
my hand and seal, this Second day of April, in the year of our
Lord One thousand eight hundred and seventy-five.