IMPROVEMENTS IN MACHINES FOR DRILLING AND BORING METALS
Year: 1861

page_text: LETTERS PATENT to Andrew Shanks, Engineer, 6, Robert Street,
Adelphi, Westminster, for the Invention of "IMPROVEMENTS IN MACHINES
FOR DRILLING AND BORING METALS."
Sealed the 30th August 1861, and dated the 15th April 1861.
PROVISIONAL SPECIFICATION left by the said Andrew Shanks at the
Office of the Commissioners of Patents, with his Petition, on the 15th
April 1861.
I, ANDREW SHANKS, Engineer, 6, Robert Street, Adelphi, Westminster, 'do.
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINES FOR DRILLING AND BORING METALS," to be as follows, and to consist of.
a mode of driving a large number of drills in an easy and simple manner. Each
drill has its own separate crank to drive it. All the drills have their cranks of
exactly the same length and form, so that a connecting plate may be applied
having as many holes as there are crank pins or drills, so as to operate on
them all simultaneously; this connecting plate in its turn is driven by cranks
or excentrics of the same stroke as the drills themselves, thereby producing a
combined rotary motion.

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
15th October 1861.
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 Fifteenth day of April, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth 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 "IMPROVEMENTS IN MACHINES FOR
DRILLING AND BORING 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 immediately 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 per-
formed, to be particularly described and ascertained in and by the following
statement and accompanying Drawings, that is to say:-
I employ as many spindles or mandrils as there are holes requiring to be
drilled at once, each spindle having its own separate drill, with a crank to
drive it. In cases where the holes are in near proximity to each other, these
cranks have their arms slanted upwards, so as to partially pass over each other
during their rotation. By this arrangement cranks of any desirable length
may be employed. The whole of the crank pins are operated on by a con-
necting plate having as many holes as there are crank pins; this connecting
plate in its turn is acted upon by a strong crank or excentric having the same
throw as the spindle cranks. If desirable, the spindle frame and crank con-
necting plate may be made so that the distances between the individual hobs
or rows of hobs may be varied at pleasure, all the parts being adjustable.

page_text: The same letters refer to the same parts in Fig. 1 and 2. F, F, is the
foundation plate; K, the hydraulic cylinder; R, the ram that operates on the
table or platform T, moving the work upwards against the drills d, d, d, d, d,
d, d, d; 5, 8, 8, 8, 8, 8, s, the spindles; c, c, c, the cranks with slanting arms; P, P,
the connecting plate operated upon by the crank or excentric D.
In witness whereof, I, the said Andrew Shanks, have hereunto set
my hand and seal, this Fifteenth day of October, in the year of
our Lord One thousand eight hundred and sixty-one.
ANDREW SHANKS. (L.S.)