CERTAIN IMPROVEMENTS IN MACHINES FOR DRILLING, BORING, AND CUTTING METALS
Year: 1856

page_text: LETTERS PATENT to Andrew Shanks, Engineer, 6, Robert Street, Adelphi,
Westminster, for the Invention of "CERTAIN IMPROVEMENTS IN MACHINES
FOR DRILLING, BORING, AND CUTTING METALS."
Sealed the 9th December 1856, and dated the 27th June 1856.
PROVISIONAL SPECIFICATION left by the said Andrew Shanks at the
Office of the Commissioners of Patents, with his Petition, on the 27th
June 1856.
I, ANDREW SHANKS, Engineer, 6, Robert Street, Adelphi, Westminster, do
hereby declare the nature of the said Invention for "CERTAIN IMPROVEMENTS IN
MACHINES FOR DRILLING, BORING, & CUTTING METALS" to be as follows:-
Figs. 1 & 2 represent the machine; Fig. 1 is an end view of the machine;
Fig. 2 is a side elevation of the same. (p. p.) Fig. 2, shews the article
operated on, and which is placed between the centres (a, a); (c, c,) are the
headstocks, carrying the cutting tools (b, b); these headstocks are moved by a
screw, on which is placed the handle (i); (g) is the carriage, on which is
placed the 2 headstocks (c, c), and which is traversed by the screw (s),
Fig. 2; (e) the bed; (f,f,) the standards; (d, d,) moveable supports.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Andrew Shanks in the Great Seal Patent Office on the
27th December 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ANDREW
SHANKS, Engineer, 6, Robert Street, Adelphi, Westminster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of June, in the year of our Lord
One thousand eight hundred and fifty-six, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Andrew Shanks, Her special licence that I, the said Andrew Shanks,
my executors, administrators, and assigns, or such others as I, the said Andrew
Shanks, 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 Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "CERTAIN IMPROVEMENTS IN
MACHINES FOR DRILLING, BORING, AND CUTTING METALS," upon the condition
(amongst others) that I, the said Andrew Shanks, 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 im-
mediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Andrew Shanks, 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 state-
mant
Figs. 1, 2, and 3, represent my machine for making cotter holes and
grooving generally. The same letters refer to the same parts in the three
views....
The whole is supported by the legs s,s; r,r, r, r, is the bed on which the
carriage f,f, is placed, having a horizontal sliding movement given it by the
variable crank j through the connecting rod q and the traverse bar p. The
length of the cotter hole or groove is determined by the length of the variable
crank j. The headstocks b, b, with their mandrills a, a, carry drills c, c, which
cut out the holes, operating on both sides of the article at the same time;

page_text: f, f, is the carriage on which are placed the two headstocks, they having a
simultaneous feed movement given them by the operation of the tappets 1, 1, on
the ratchet wheel t, by turning slightly the right and left-handed screw z;
the vice e, has a right and left handed screw for fastening the articles
operated on centrically to the machine; and headstock g is likewise used for
the same purpose; u, u, the driving apparatus for the two headstocks; k, the
pulley for producing rotary motion to the variable crank.
Fig. 4 is a hand apparatus for boring cotter holes. a, the shaft operated
on; d, the drill; h, the handle; s, the screw for forcing up the drill; j,j, the
jaws for grasping the shaft by the screw b.
1st, the use and application of two headstocks, each having a drill or tool,
and operating simultaneously on the same article, thereby doing the work more
expeditiously.
2nd, the application of cam plates and pins, as shewn, fixed on the axes of
the elliptical wheels, to retain them in gear during their entire revolution.
3rd, the application of a concentric vice, to fix the articles.
In witness whereof, I, the said Andrew Shanks, have hereunto set my
hand and seal, this Twenty-seventh day of December, in the year of our
Lord One thousand eight hundred and fifty-six.
ANDREW SHANKS. (L.S.)