IMPROVEMENTS IN MACHINERY FOR DRILLING AND BORING
Year: 1875

page_text: LETTERS PATENT to James Dodge, of the City of Manchester,
Engineer, for the Invention of "IMPROVEMENTS IN MACHINERY FOR
DRILLING AND BORING."
Sealed the 20th December 1875, and dated the 31st July 1875.
PROVISIONAL SPECIFICATION left by the said James Dodge at the
Office of the Commissioners of Patents, with his Petition, on the
31st July 1875.
I, JAMES DODGE, of the City of Manchester, Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINERY
FOR DRILLING AND BORING," to be as follows:—
My Invention consists in an improved compound machine by which
four or other convenient number of holes can be drilled or bored at the
same time, and by which the spindles of the drilling or boring tools at
opposite sides of the machine are set simultaneously and in unison with
each other, thereby ensuring accuracy in the work and great economy
of labour in setting or adjusting the tools.

page_text: My improved machinery consists of a foundation plate, and of four
standards, two at each end, the distance between which can be varied.
The standards are connected by cross slides supporting the boring head-
stocks. The cross slides are raised or lowered and the boring headstocks
aro traversed to and fro on the cross slides by screws, all of which are con-
nected together by gearing, and so that by turning one handle all or any
number of the tools are moved simultaneously. The cross slides and
boring headstocks are connected to their screws by segments of screw
nuts or other equivalents, so that by turning a handle each slide or pair
of headstocks can be connected to or disconnected from its screw.
The boring tools are all driven by horizontal and upright shafts con-
nected together by bevel gearing, and capable of being disconnected if
required, so that any number can be worked together. The shafts aro
driven by a set of speed pulleys and the articles to be drilled or bored
are secured to the foundation plate or to suitable brackets fixed to the
same.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Dodge in the Great Seal Patent Office on
the 28th January 1876
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
DODGE, of the City of Manchester, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of July, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
ninth year of Пer reign, did, for Herself, Her hens and successors,
give and grant unto me, the said James Dodge, Her special licence,
that I, the said James Dodge, my executors, administrators, and
assigns, or such others as I, the said James Dodge, my 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 Britam and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY
FOR DRILLING AND BORING," upon the condition (amongst others) that I, the

page_text: said James Dodge, my excutors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should par-
ticularly 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 James Dodge, do hereby declare
the nature of my said Invention, and 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) :-
My Invention consists in an improved compound machine by which
four or other convenient number of holes can be drilled or bored at the
same time, and by which the spindles of the drilling or boring tools at
opposite sides of the machine are set simultaneously and in unison with
each other, thereby ensuring accuracy in the work and great economy of
labour in setting or adjusting the tools.
And in order that my Invention may be fully understood and
readily carried into operation, I will proceed to describe the accom-
panying Sheet of Drawings.
Fig 1 is a side elevation and Fig. 2 an end view of my improved
compound boring and dilling machino provided with four boring head-
stocks, but the number of beadstocks may be varied.
a is the foundation plate which is provided with longitudinal grooves
to receive the heads of the clamping down bolts and of the bolts for the
four standards b, two of which are secured at opposite ends of the
foundation plate. The distance between the two pairs of standards can
be varied according to the work to be done by means of the screws p, p,
which take into nuts or portions of nuts connected to the standards, and
which are thrown out of gear when required. The cross slides care
connected to the standards by the upright screws d, which take into
screw nuts or segment screw nuts let into the ends of the slides. The
boring headstocks e with the driving gear fit upon the cross slides C,
and'
are moved to and fro longitudinally by the screws f, and corresponding
headstocks without driving gear, as shewn in Fig. 3, are placed on the cross
sides at the other end of the machine. Each headstock is connected to
the screw
by a segmental screw nut or other equivalent, which can bɖ

page_text: Having thus stated the nature of my Invention, and described tho
manner of performing the same, I wish it to be understood that I do not
limit myself to the details given, as the number of the boring bars
and the modes of supporting and driving them may be varied to suit
the particular class of work to which the machine is to be applied, I
claim,―
First. The improved compound machine shewn and described by
which two or other convenient number of holes can be bored or drilled
simultaneously, and so arranged that the boring headstocks can be
moved either perpendicularly or horizontally to the foundation plate.
Secondly Connecting or coupling the several cross slides and their
respective boring headstocks together, so that any one pair of headstocks
can be set simultaneously, while the boring bar remains at all times
parallel to the foundation plate.
In witness whereof, I, the said James Dodge, have hereto set my
hand and scal, this Twenty-seventh day of January, One
thousand eight hundred and soventy-six.