IMPROVEMENTS IN MACHINES FOR DRILLING OR BORING METALS OR OTHER SUBSTANCES
Year: 1853

page_text: LETTERS PATENT to Joseph Porter, of the Salford Screw Bolt
Works, in the County of Lancaster, Engineer and Tool Maker,
for the Invention of "IMPROVEMENTS IN MACHINES FOR DRILLING
OR BORING METALS OR OTHER SUBSTANCES."
Scaled the 7th April 1854, and dated the 7th October 1853.
PROVISIONAL SPECIFICATION left by the said Joseph Porter at
the Office of the Commissioners of Patents, with his Petition, on
the 7th October 1855.
I, JOSEPH PORTER, of the Salford Screw Bolt Works, in the County
of Lancaster, Engineer and Tool Maker, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN MACHINES FOR DRILLING OR
BORING METALS OR OTHER SUBSTANCES " to be as follows:-
It consists in an improved construction and arrangement by which
machines for drilling and boring are rendered more simple and econo-
mical of construction than hitherto, and by which arrangement the
spindle will possess the same length of bearing in its outward as in its
inward positions. It is constructed in the following manner:-Upon
a spindle of suitable length is fitted a tube, upon which a thread is cut
equal in length to the distance the spindle is intended to travel, in

page_text: which tube the spindle is free to revolve. The tube is made so as not
to move longitudinally upon the spindle by a shoulder formed on the
outward end of the spindle, and a collar fixed on the inward end of the
spindle, which work against the ends of the tube. The male screw
thread which is formed on the tube is screwed into the boss of a wheel
formed with a female screw thread. The spindle, with the screw
tube upon it, is fitted into a hollow shaft so as to be free to slide
backwards or forwards longitudinally, but is connected by means of a
key or key groove or other suitable "means with the hollow shaft so as
to be revolved on its axis by it. Both ends of the hollow shaft may be
placed in the bearings or the inward end only, the screw tube sliding
in the bearing: The screw tube is prevented from revolving with the
spindle by a key secured_to_the_bearing which takes into a groove cut
in the screw tube. Motion for revolving the spindle may be imparted
to the hollow shaft by the usual means, and the wheel, which is pro-
vided with the female screw thread, and takes on to the screw tube,
may be retained in its position by the bearing in which the screw tube
slides on one side, and by the end of the hollow shaft on the other.
The wheel may be revolved for feeding the spindle for drilling or boring
by hand or by self-acting mechanism.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Porter in the Great Seal Patent Office
on the 7th April 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
JOSEPH PORTER, of the Salford Screw Bolt Works, in the County of
Lancaster, Engineer and Tool Maker, send greeting.
WHEREAS Hcr most Excellent Majester Queen Victoria, by. Her
Letters Patent, bearing dato. the Seventh day of October, in the year
of our Lord One thousand eight hundred and fifty-three, in the seven-
teenth year of Her reign, did, for Herself, Her heirs and successors;
give and grant unto me, the said Joseph Porter, Her especial licence
that T, the said Joseph Porter, my exécutors, administrators, and
assigns, or such others as I, the said Joseph Porter, my.exécutors,

page_text: 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 OR BORING METALS OR OTHER SUBSTANCES,"
upon the condition (amongst others) that I, the said Joseph Porter,
by an instrument in writing under my hand and seal, 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 nionths
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Joseph Porter, 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 (and accompanying Drawing), that is to say:
It consists in an improved construction and arrangement of drilling
or boring mechanism by which such machines or apparatus are ren-
dered more compact and simple than machines or apparatus hitherto
in ise for like purposes, and in which improved construction and
arrangement the spindle possesses the same hold of its bearings in its
outward as in its inward position. The peculiarity of its construction
consists partly in making the screw, generally employed to move the
spindle endways, hollow, that is, cutting the thread on a tube which is
fitted on the spindle so that it can freely revolve in it, being kept from
moving' endways on the spindle by shoulders or collars formed or fixed
on the spindle. This peculiarity may be retained with the nut (into
which the screw tube screws) arranged outside or inside the bearings
of the spindle; but the arrangement which I consider the most simple
and compact is that shewn in the Drawing annexed hereto, wherein
the peculiarities of my Invention are shewn applied to a pillar drilling
apparatus in combination with a moveable table by two 'views, Fig. 1,
and 2; Fig. 1, being aside, and Fig. 2, a front view. The parts in
which my Invention consists being represented by an enlarged
sectional view in Fig. 3, which I shall now proceed to describe, pre-

page_text: mising that the same letters, and figures will be used to denote corre-
sponding parts in each Figure of the Drawing. A, is the upper, A' the
lower bearing; B, the spindle; B', the screw tube fitted that the
spindle will revolve in it, and secured from end motion on the spindle
by the shoulder formed on the spindle at a, at one end, and by a
collar B² fixed on the spindle by a pin at the other end. The tube B¹
is also kept from 'revolving by the friction of the spindle by a koy G
fixed in or to the bearing A', which takes in a groove cut longitudinally
in the thread of the tube. The external part of the tube B' fits into the
bearing A', and into a hollow shaft D, the upper end of which is
placed in the bearing A. revolving in steps E, which retain it in
position by taking between shoulders formed in it. The hollow shaft
extends beyond the bearing to take hold of the groove c, on the end of
the spindle into which slides a key c¹ fixed or formed in the end of the
hollow shaft D. Revolving motion is conveyed to the spindle by the
bevel wheel F¹ working into that (D¹) fixed on or cast with the
hollow shaft, and by the hollow shaft it is transmitted by means of the
key and groove (c, and c) to the spindle (B). The hollow shaft D
may also serve when made to abutt against the boss of the wheel G,
(into which the thread of the screwed tube passes) to keep it in its
position against the bearing A', but this may be accomplished inde-
pendently by forming the boss of the screw wheel with a groove or with
a collar (G) to fit in a groove cut in the bearing A', and the cap A³.
When this wheel is revolved the spindle will be moved up or down.
The feeding of the drill is made self-acting as follows:-A worm
wheel E is fitted loose on the boss of the screw wheel G; it is revolved
by a worm I' (see Figs. 1, and 2,) on a shaft I, which may be fitted in
brackets fixed or formed in the bearings and supports of the drill. The
worm shaft I may have motion imparted to it by a strap passing over
pulleys F on the end of shaft (F) driving bevil wheels (F³ being the
driving pulleys), and the pulleys I on worm shaft J. It has been
said that the worm wheel is loose on the boss of the screw wheel,
therefore the wheel will revolve without turning the screw whcel; but
a provision is made by means of the short shaft J, fitted into the arm
of the screw wheel and having a click J¹ on one end, and a handle J³

page_text: at the other, by which the click can be brought in and out of ratchet
teoth formed in the inside of the worn wheel, by which means the
worn and screw wheel can be connected or disconnected at pleasure.
It will be obvious that the peculiarities of my Invention may be applied
to all classes of drilling machines.
I have now particularly described the nature of my Invention, and
in what manner it may be carried into effect, and wish it to be under-
stood that I do not claim all the parts shewn and described as of my
Invention, but claim,-
Firstly, the use in drilling and boring machines of a screw' tube,
similar and acting in like manner to B', for feeding the drill or giving
end motion to the spindle.
Secondly, I claim the combination, arrangement, and construction of
the parts for drilling or boring machines explained by Fig. 3.
In witness whereof, I, the said Joseph Porter, have hereunto set
my hand and seal, this Fifth day of April, in the year of our
Lord One thousand eight hundred and fifty-four.
Signed in the presence of
PETER J. LIVSEY,
of Manchester.
JOSEPH PORTER. (L.s.)