IMPROVEMENTS IN THE CONSTRUCTION OF PORTABLE DRILLING MACHINES
Year: 1881

page_text: LETTERS PATENT to Thomas Lees and Ralph Lees, both of Park Foundry,
Hollinwood, Manchester, Engineers, for an Invention of "IMPROVEMENTS IN
THE CONSTRUCTION OF PORTABLE DRILLING MACHINES."
PROVISIONAL SPECIFICATION left by the said Thomas Lees and Ralph
Lees. at the Office of the Commissioners of Patents on the 14th February
1881.
THOMAS LEES and RALPH LEES, both of Park Foundry, Hollinwood, Manchester,
Engineers. "IMPROVEMENTS IN THE CONSTRUCTION OF PORTABLE DRILLING
MACHINES."
This Invention relates to improvements in the construction of portable
drilling machines to facilitate the operation of drilling in difficult positions, as well
as the saving of time and labour.
These improvements consist in the application of a self-feeding arrangement, and
are effected by the employment of four wheels and a solid spindle, each wheel
differing in the number of teeth and working in connection with the solid spindle
of the drill, placed and working within the spindle-frame and connected together
by means of pins or keys, two of which wheels are connected together, one above
the other, on one pin forming the axle of the said wheels separate from the other
two, which are placed immediately in front, one over the other, so as to work above
the lower bevil wheel and in conjunction with the other two wheels when desired.
for the purpose of drilling.
When it is required to withdraw the drill from the work operated upon it is
done by lifting the pin upon which the two wheels revolve (or by an eccentric
detachment), thereby locking the lower wheel on the solid spindle and releasing the
ГД...

page_text: top wheel, also on the solid spindle, and by reversing the motion of the handle the
drill is speedily withdrawn from the work, and whilst the pin is in its raised
position it is only necessary to again reverse the motion of the handle in order to
bring the tool down quickly in position to the work to be operated upon, and by
lowering the pin with the two wheels into its former position the drill is self-feeding
and ready for work.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Lees and Ralph Lees in the Great Seal Patent Office on
the 12th August 1881.
THOMAS LEES and RALPH LEES, both of Park Foundry, Hollinwood, Manchester,
"IMPROVEMENTS IN CONSTRUCTION OF PORTABLE DRILLING
Engineers.
MACHINES."
Our Invention is designed for the purpose of producing a portable self-acting
adjustable feed drilling machine that can be readily adapted. and "clamped" to
heavy pieces of machinery or iron bridge work for the purpose of drilling or
boring holes in the same at a speed proportionate to the hole to be drilled.
The improvements may be described as follows:-A suitable frame supports the
drill spindle and accompanying driving apparatus, which are secured to a horizontal
arm, which arm when required will revolve so as to point the drill spindle to almost
any angle. The revolving motion of the drill spindle is obtained by the application
of a handle or pulley and a pair of ordinary bevil wheels, one of which is fixed to
the handle or pulley and the other to the drill spindle. The. stud carrying the
handle or pulley and its bevil wheel may with equal convenience occupy their
several positions in order to facilitate the drilling of the work at difficult angles.
The self-feed of the drill spindle is effected by the application of four small
differential spar wheels fixed above the bevil wheel on the drill spindle, two of which
revolve with and are on the drill spindle and the remaining two differential wheels
are on a stud parallel to it, which, with the wheels.keyed on it, it is lifted when the
drill is to be put out of gear. The lifting of the stud and the two wheels thereon
enables the operator to put the tool quickly to or to withdraw it speedily from its
work.
In order that the Invention may be readily explained and understood we attach
Drawing hereto for reference, which represents the drill elevated on its vertical
support and secured in position with its holding clamps ready for working, and the
drill spindle A, with its differential wheels, one of which B is pinned on the spindle
and revolves with it and drives the wheels C and D, which are keyed on the revolving
stud.
The wheel D drives the nut E, which fits on the thread of the drill spindle, and
which regulates the amount of the feed, and it is by raising the stud upon which

page_text: are the wheels C and D that the operator is enabled to speedily change the position
of the revolving tool.
Having now described and illustrated our said Invention, together with the
modes or methods of applying the same, we wish it to be distinctly understood that
what we claim is,--
The employment, use, or adaptation of a differential motion to portable drilling
machines for the purpose of providing a uniform feed action to the drill according
to the work to be operated upon, and controlled by the stud or pin upon which the
two wheels are keyed, together with the general arrangement or construction of
the parts constituting these present improvements, substantially as described and
illustrated and for the purposes as herein set forth.
In witness whereof, we, the said Thomas Lees and Ralph Lees, have
hereunto set our hands and scals, this Tenth day of August, in the year
of our Lord One thousand eight hundred and eighty one.
Witness,
W. H. SMITH,
Engineer & Patent Agent,
3, York Buildgs.,
Liverpool.
THUMAN LEED.
RALPH LEES.
(L.S.)
(L.S.)