CERTAIN IMPROVE- MENTS IN PORTABLE DRILLING MACHINERY, PARTS OF WHICH ARE APPLICABLE TO MACHINES FOR OTHER PURPOSES
Year: 1869

page_text: LETTERS PATENT to James Spencer and James Consterdine, of the
Firm of James Spencer & Co., of Hollinwood, near Manchester, in
the County of Lancaster, for the Invention of "CERTAIN IMPROVE-
MENTS IN PORTABLE DRILLING MACHINERY, PARTS OF WHICH ARE APPLICABLE
TO MACHINES FOR OTHER PURPOSES."
Sealed the 25th February 1870, and dated the 28th August 1869.
PROVISIONAL SPECIFICATION left by the said James Spencer and
James Consterdine at the Office of the Commissioners of Patents,
with their Petition, on the 28th August 1869.
We, JAMES SPENCER and JAMES CONSTERDINE, of the Firm of James
Spencer & Co., of Hollinwood, near Manchester, in the County of
Lancaster, do hereby declare the nature of our said Invention for
"CERTAIN IMPROVEMENTS IN PORTABLE DRILLING MACHINERY, PARTS OF WHICH
ARE APPLICABLE TO MACHINES FOR OTHER PURPOSES," to be as follows:-
The Invention relates more particularly to improvements in that class
of tool known as a portable drill, and is designed for the purpose of

page_text: effecting a more ready adaptation of such tool to the work it is required
to operate upon, and also at the same time to facilitate and expedite the
process of drilling by the novel employment and adaptation thereto of a
self-acting feed motion.
The improvements consist in mounting upon a standard supplied with
clamps or holdfasts for securing the tool to the work it is desired to
perform upon an adjustable bracket or clip, which supports a horizontal
journal that can be made to slide or swivel therein. To one end of this
journal a bracket is constructed for supporting the drill spindle in any
position at right angles to the horizontal journal forming the sliding or
swivel bearing before mentioned. The horizontal shaft of this journal
when actuated by handle or other equivalent gives the rotary motion to
the drill through the medium of a bevil wheel and pinion in the ordinary
manner, but in order to transmit a self-acting feed motion to the same at
the time of drilling we employ the novel and peculiar adaptation of
different gearing to the drill spindle, the arrangement of which con-
sists in mounting two wheels, one of which is secured to and revolves
with the spindle itself, the second or upper one being keyed to a screw
working in the interior of the drill spindle, which when in action gives a
feed motion to the drill through the medium of two other wheels
arranged as follows:-The wheel on the drill spindle gears into another
wheel forming one of two which arre carried by a bracket, and work
upon a stud which has an eccentric movement for the purpose of
throwing the wheels in or out of gear when required. The upper
and lower tier of wheels differ slightly in their proportion or relative
number of teeth, so that when- driven by the wheel keyed upon and
revolving with the drill spindle they impart to the second or upper
wheel keyed upon the screw for the self-acting feed a slightly accelerated
or differential motion to that of the drill spindle containing the nut in
which the screw works, thereby transmitting a uniform feed to the
drilling tool when at work.
The arrangement of geering herein described for giving a feed motion
to the drill may also be adapted in a like manner to the spindles of other
boring or drilling machinery not portable, and in order that the feed may
be altered to suit the class of work to be performed discs or frictional
surfaces, which can be adjusted so as to act with greater or less. "drag"
or frictional contact may be substituted, for or used in conjunction with

page_text: geering, whereby the operative can adjust the amount of "feed" given to
the drill according to the class of work or nature of the material being
acted upon.
filed by the said James Spencer and James Consterdine in the
Great Seal Patent Office on the 28th February 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
SPENCER and JAMES CONSTERDINE, of the Firm of James Spencer & Co.,
of Hollinwood, near Manchester, in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her.
Letters Patent, bearing date the Twenty-eighth day of August, in the year.
of our Lord One thousand eight hundred and sixty-nine, in the thirty-.
third year of Her reign, did, for Herself, Her heirs and successors, give.
and grant unto us, the said James Spencer and James Consterdine, Her
special license that we, the said James Spencer and James Consterdine,
our executors, administrators, and assigns, or such others as we, the
said James Spencer and James Consterdine, our 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 PORTABLE
DRILLING MACHINERY, PARTS OF WHICH ARE APPLICABLE TO MACHINES FOR OTHER
PURPOSES," upon the condition (amongst others) that we, the said James
Spencer and James Consterdine, our executors or administrators, by an
instrument in writing under our, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Inven-
tion, 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 we, the said James Spencer and James Conster-
dine, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and

page_text: ascertained in and by the following statement and accompanying
Drawings (that is to say) :-
Our Invention is designed for the purpose of producing a portable
self-acting adjustable feed drilling tool 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 class of drill and work acted upon. :
The improvements may be described as follows:-A suitable frame is
provided for the purpose of supporting the drill spindle and holder,
which is secured to and forms part of a long projecting horizontal boss
or journal, in and through which the shaft driving the said drill spindle
is supported and is caused to give a revolving motion to the drill spindle
through the medium of bevil gearing, the said horizontal boss or journal
being supported by means of a bearing that will allow of the said
horizontal journal and frame supporting the drill to be turned and
placed at any angle that will adjust it to the work it is required to
operate upon. The said bearing supporting the horizontal journal is
provided with a clip or jaw formed at right angles, that will allow of its
being secured at any height upon a vertical bar, the bottom end of
which is provided with adjustable jaws, by which the tool is attached to
the piece of work to be operated upon. The feed to the drill when
revolving may be accomplished by means of differential wheels, the
carriers of such wheels being mounted upon an excentric stud that will
admit of the wheels being thrown into and out of gear; this arrangement
of driving gear will give one regular feed to the drill, but in order to
give a feed to the drill when revolving according to the class of hole and
work it is operating upon we actuate the internal screw, giving the
downward motion to the drill by means of a disc secured to the internal
screw, and against the periphery of which whilst revolving a yielding
pressure is exerted that can be adjusted by a set screw or other equi-
valent to give any amount of frictional resistence desired according to
the work in hand, thus enabling the feed to be diminished or accelerated
in accordance therewith.
In order that the Invention may be better understood and explained
in detail, we have here no attached a Sheet of Drawings, in which
Fig. 1 is made on a scale of about half size, and Figs. 2, 3, and 4,
full size.

page_text: Fig. 1 represents in elevation the improved portable drill supported by
its swivel bearing on the vertical rod, supplied with "clamps" for
securing the drill and adapting it to the metal it has to operate upon;
Fig. 2 represents in vertical section the drill spindle and its actuating
screw employed through the medium of the differential gearing to give a
uniform feed to the drill when revolving; Fig. 3 represents a detached
front section of the top portion of the framing and feed screw, in which
is shewn an arrangement of friction wheel secured to the actuating feed
screw; and Fig. 4 represents a sectional plan view of the same.
In these Figures a, a, is the frame of the drill, from which the journal
or long boss b projects for the purpose of being supported by the
adjustable boss c secured to the vertical rod or bar d, the bottom of
which is provided with adjustable clamps e employed for securing the
portable drill to the work it has to perform upon. The shaft f supplied
with the handle g passes through and freely revolves in the long boss b,
its extremity projecting through the frame a is supplied with a bevil
wheel gearing into and driving the pinion i secured to and giving
motion to the sleeve k and drill spindle 2. The sleeve k in Figs. 1 and 2
has secured to its upper end a wheel m, that gears into the carrier
wheel n, which transmits motion through the second carrier wheel o to
the wheel p secured to the actuating feed screw q; the difference in the
number of teeth in these wheels slightly reduce the speed of the screw q,
thereby effecting a uniform downward feed to the drill spindle during
the time it is at work on a piece of metal. The carrier wheels m and o
are thrown into and out of gear with the wheels m and p by the handle r
and excentric position of the stud 8.
The modification of self-acting feed shewn in Figs. 3 and 4 consists in
securing to the actuating feed screw q a friction wheel or disc t. Against
the periphery of wheel a, yielding pressure is exerted through the
medium of the sliding piece n and set screw v, thus according to the
amount of pressure the piece u is caused to exert against the periphery
of the disc t the screw q will be retarded in accordance with the amount
of pressure so exerted, consequently giving more or less feed to the drill
in accordance with the amount of pressure so exerted.
Having now described the nature of our said Invention, together with
the method of carrying the same into practical effect, we wish it to be
distinctly understood in conclusion that we claim the novel employment,

page_text: use, and adaptation to portable drilling machines of a differential motion
for giving a uniform feed or downward action to the drill according to
the work such drill is operating upon, together with the general arrange-
ment, construction, and adaption of the parts constituting these present
improvements, or any slight modification thereof, as herein-before
described, set forth, and fully illustrated in the Drawings attached.
In witness whereof, we, the said James Spencer and James Conster-
dine, have hereunto set our hands and seals, this Twenty-fifth day
of February, in the year of our Lord One thousand eight hundred
and seventy.
JAMES SPENCER.
(L.8.)
Witness to the signatures,
THOMAS WRIGLEY,
JAMES CONSTERDINE. (L.S.)
Agent to the Patentees,
Imperial Chambers,
Manchester.