IM- PROVEMENTS IN PORTABLE DRILLING MACHINES, AND IN THE MODE OF DRIVING THE SAME, THE SAID IMPROVEMENTS IN DRIVING SUCH MACHINES BEING ALSO APPLICABLE TO DRIVING OTHER PORTABLE MACHINES, AND IN THE MACHINERY OR APPARATUS EMPLOYED THEREIN.
Year: 1871

page_text: ETTERS PATENT to John Sprague, of Nursery Street, Seedley Road,
Pendleton, in the County of Lancaster, for the Invention of "IM-
PROVEMENTS IN PORTABLE DRILLING MACHINES, AND IN THE MODE OF DRIVING
THE SAME, THE SAID IMPROVEMENTS IN DRIVING SUCH MACHINES BEING ALSO
APPLICABLE TO DRIVING OTHER PORTABLE MACHINES, AND IN THE MACHINERY
OR APPARATUS EMPLOYED THEREIN. "-A communication from abroad by
William H. Thorne, of Philadelphia, Pennsylvania, United States of
T
PROVISIONAL SPECIFICATION left by the said John Sprague at the
Office of the Commissioners of Patents, with his Petition, on the
27th July 1871.
I, JOHN SPRAGUE, of Nursery Street, Seedley Road, Pendleton, in the
3 County of Lancaster, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN PORTABLE DRILLING MACHINES, AND IN THE MODE OF
DRIVING THE SAME, THE SAID IMPROVEMENTS IN DRIVING SUCH MACHINES BEING
ALSO APPLICABLE TO DRIVING OTHER PORTABLE MACHINES, AND IN THE MACHINERY:

page_text: OR APPARATUS EMPLOYED THEREIN," a communication to me from abroad by
William H. Thorne, of Philadelphia, Pennsylvania, United States of
America, Engineer, to be as follows:-
The object of this Invention is to provide a portable drilling machine,
whose spindle can be set at any angle under thirty degrees with its base,
or with the side of its post, and which can be driven by the driving
apparatus hercin-after described at any distance or in any direction.
In carrying out this Invention the driving apparatus is bolted to the
ceiling of the workshop or other suitable place, and its shaft receives
motion through the fast and loose pullies by means of a flat belt from the
"line shaft" of the shop.
The drilling machine is clamped or bolted to the piece of machinery
or other metal object which is required to be drilled, and its spindle
receives motion through a cone pulley on the pinion shaft by means of
a round belt from the driving apparatus.
The Invention consists partly in the combination of a driving pulley
which revolves in a vertical plane on a shaft running in a fixed bearing
of two "idler" pullies revolving on journals held in a frame, which
frame can be rotated in a horizontal plane on a stud with a vertical
hole through its centre, and one "idler" pulley revolving on a journal
held in a moveable weighted frame in such manner that a continuous
cord or belt being properly passed around this series of pullies and
through the hole in the stud of the rotating frame can be used
to transmit power to any distance and in any direction, or to a
changeable distance and direction limited of course by the length of
the cord or belt.
The frame carrying the drill spindle, bevel gears, and cone pulley of
a drilling machine is provided with a ball-shaped journal fitted to and
held by a socket clamp on the supporting device, this clamp being made
narrow enough to permit the frame carrying the drill spindle, bevel
gear, and cone pulley, to be vibrated in any direction to an angle of
thirty degrees or less. This socket clamp also permits the frame
carrying the drill spindle to be rotated, so as to bring the cone pulley
in such position as to properly receive the driving belt.
The adjustment of the centre of the drill spindle to the point required
is accomplished by the use of a radial slotted arm clamped on the top
or side of a post by means of a stud passing through the slot in the

page_text: arm, with a nut and washer on its end, and for the adjustment of the
distance between the base and top of the post carrying the radial arm
of the drilling machine to suit different lengths of drills and chucks
which may be used in the end of the spindle is accomplished by making
the post in two pieces, one fitting into the other, so that the inside one
can be moved in or out of the other to shorten or lengthen this distance,
and then clamped and held at the position required. The outside portion
of the post is provided with a flat surface at an angle of ninety degrees
to its base, to which flat surface, by means of a stud in its centre the
radial arm can be bolted, so that the drill can be used parallel or at an
angle of thirty degrees or less with the base of the post.
The apparatus above described for driving the portable drilling
machine is equally applicable to driving other portable machines.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Sprague in the Great Seal Patent Office on
the 23rd January 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
SPRAGUE, of Nursery Street, Seedley Road, Pendleton, in the County of
Lancaster, send greeting.
.
1
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of July, in the
year of our Lord One thousand eight hundred and seventy-one, in the
35th year of Her reign; did, for Herself, Her heirs and successors, give
and grant unto me, the said John Sprague, Her special license that I;
the said John Sprague, my executors, administrators, and assigns, or
such others as I, the said John Sprague, my executors, administrators,
or 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 PORTABLE DRILLING
MACHINES, AND IN THE MODE OF DRIVING THE SAME, THE SAID IMPROVEMENTS IN
DRIVING SUCH MACHINES BEING ALSO APPLICABLE TO DRIVING OTHER PORTABLE
MACHINES, AND IN THE MACHINERY OR APPARATUS EMPLOYED THEREIN," a com-
munication to me from abroad by William H. Thorne, of Philadelphia,

page_text: Pennsylvania, United States of America, Engineer, upon the condition
(amongst others) that I, the said John Sprague, my executors or
administrators, by an instrument in writing under my hand and seal,
should particularly describe and ascertain the nature of the said In-
vention, 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 John Sprague, do hereby declare
the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Drawings, and to the letters and figures marked thereon, that is to
say:
My said Invention has for its object the providing a portable drilling
machine, whose spindle can be set at any angle under 30° with its base
or with the side of its post, and which can be driven by the driving
apparatus herein-after described at any distance or in any direction.
In carrying out my Invention the driving apparatus is bolted to the
ceiling of the workshop or other suitable place, and its shaft receives
motion through fast and loose pulleys by means of a flat belt from the
line shaft of the shop.
The drilling machine to be driven by this apparatus is clamped or
bolted to the piece of machinery or other object which is required to
be drilled, and its spindle receives motion through a cone pulley on the
pinion shaft by means of a round belt from the before-mentioned driving
apparatus.
My Invention consists partly in the combination with a driving pulley
which revolves in a vertical plane on a shaft running in a fixed bearing,
of two "idler" pulleys revolving on journals held in a frame, which
frame can be rotated in a horizontal plane on a stud with a vertical hole a
through its centre, and a third "idler" pulley revolving on a journal
held in a moveable weighted frame in such manner that a continuous
cord or belt being properly passed around this series of pulleys and
through the hollow or tubular stud of the rotating frame can be used to
transmit power to any distance and in any direction, or to or in a 3
changeable distance or direction,-limited of course by the length of the
driving cord or belt.

page_text: The frame which carries the drill spindle, bevel gears, and cone pulley
of a drilling machine, is provided with a ball-shaped journal fitted to
and held by a socket clamp on the supporting device, this clamp being
made narrow enough to permit the frame carrying the drill spindle with
its gearing and cone pulley to be adjusted in any direction to an angle
of 30° or less. This socket clamp also permits the frame carrying the
drill spindle to be rotated, so as to bring the cone pulley in such
position as to properly receive the driving belt.
The adjustment of the centre of the drill spindle to the point required
is accomplished by the use of a radial slotted arm clamped on the top or
side of a post by means of a stud passing through the slot in the arm
with a nut and washer on its end. The providing for the adjustment
of the distance between the base and top of the post which carries the
radial arm of the drilling machine, so as to suit different lengths of
drills and chucks which may be used in the end of the spindle, is
accomplished by making the post telescopic or in two pieces, one fitting
into the other, so that the inside one can be moved in or out of the
other to shorten or lengthen this distance, and then clamped and held
in the position required. The outside portion of the post is provided
with a flat surface at an angle of 90° to its base, to which flat surface,
by means of a stud in its centre, the radial arm can be bolted so that
the drill can be used parallel or at an angle of 30° or less with the base
of the post.
The apparatus above described for driving the portable drilling
machine is equally applicable to driving other portable machines.
And in order that my said Invention may be fully understood I
shall now proceed more particularly to describe the same, and for that
purpose shall refer to the several Figures on the annexed Sheet of
Drawings, the same letters of reference indicating corresponding parts
in all the Figures.
Figure 1 of my Drawings is a side elevation of my improved apparatus
for transmitting power to portable drilling or other machines; Figure 2
is a front elevation of the same; Figure 3 is a plan of the same; Figure 4
is a side elevation of the portable drilling machine; Figure 5 is a front
elevation of the same; and Figure 6 is a sectional plan of the same.
below the line 1-2.
-
A is the hanger of the driving apparatus; a (Figure 2) is the pulley:
to which the power is applied; b is the shaft upon which this pulley, as:

page_text: well as the grooved pulley c, are secured; B is the rotating frame sup-
ported by the hollow stud C, which has a vertical hole through its centre
in line with the receiving edge of the pulley c. The grooved “idler”
pulley d revolves on the journal e, so that its delivering edge is in line
with the centre of the hole in the stud C. The grooved "idler" pulley f
also revolves on the same journal e alongside of the pulley d. The
grooved "idler" pulley g revolves on the stud / held in the weighted
frame D.
The round driving belt or band is arranged as follows:-It passes
under the pulley g and supports it and the frame D, then up over the
pulley then down to the cone pulley K of the drilling or other
machine, then back under the pulley d, then up through the hole in
the stud C and over the pulley c, and finally down to the pulley g. The
pulley c rotates in the direction shown by the arrow.
It may be seen by inspection of Figure 3 that the frame B can be
rotated in a complete circle on the stud C and the deliving edge of the
pulley d being in line with the centre of this stud the round belt will
be properly delivered through the hole in the stud C to the pulley c,
no matter in what direction the pulley d may be adjusted. The weighted
pulley 9 being hung on the round belt between the pulley c and the
'idler" pulley f adjusts itself to the different positions of the pulley f.
when the frame B is rotated, and by its rise and fall permits the belt
to be led to different distances, as required, so that it can be seen that
the swivelling of the frame B permits the belt to be led in any direction,
and the rise and fall of the weighted pulley permits it to be led to any
distance.
As the frame B in rotating does not alter the relation between the
delivering edge of the "idler" pulley d and the receiving edge of the
driving pulley c, and as the suspended weighted pulley 9 accomodates
itself to the change in the relation between the deliving edge of the
driving pulley c and the receiving edge of the "idler" pulley f, it will
be understood that power can be transmitted through the round belt as
well in one direction from the hanger A as in another, and to different
distances variable to the amount of the rise and fall of the weighted
pulley g. The round belt is cut in sections of the length required for
this rise and fall, and each section is provided with a hook at one end
and an eye at the other end, so that when the variation in the distance
afforded by the rise and fall of the weighted pulley g is not sufficient

page_text: sections of belt can be added or removed, and the required distance be
obtained.
The portable drilling machine adapted to be driven by the above-
described apparatus is represented by Figures 4, 5, and 6. E is the
frame with the ball-shaped journal i; F is the radial slotted arm having
the socket clamp j on its end, which is shaped to conform with the ball-
shaped journal i, and made narrow enough to permit the frame E to
be vibrated to an angle of 30 degrees from the perpendicular in any
direction; G is the inside portion of the post fitted to slide in the
outside portion H, and held in any desirable position by the clamping
screw k. A vertical stud projects from the upper end of G, and a
horizontal stud m projects from the side of H. These are used for
clamping the radial slotted arm F, either on the top or side of the post,
as may be desired.
>
The outside portion of the post H has its base made in the shape of
a cross with bolt holes in it to facilitate its being clamped to the place
where drilling is required. The bevil gear wheel n revolves in a bearing
in the frame E and drives the spindle I by means of a groove and
feather. The bevel pinion O is driven by the grooved cone pulley K
through the shaft p.
The feet of the drill spindle I is accomplished by means of the screw r
working in the nuts by the hand wheel t. The screw r is coupled to
the spindle I by means of the yoke nut vand jam nut w. L is a half
collar (see Figures 4, 7, 8, and 10) bolted to the end of the arm F, and
fitting a shoulder on the bottom of the ball-shaped journal i, which
collar, when in its place, prevents the frame E from being vibrated, and
keeps the centre of the spindle I at an angle of 90 degrees with the base
of the post G. When it is desired to alter this angle the half collar L
should be removed.
>
It will be observed that the base of the post I can be clamped to any
piece of machinery, or in any place where drilling is required, and the
frame E rotated so as to bring the cone pulley in line with the belt
from the driving apparatus herein-before described. The slot in the
arm F permits the said arm to be swung completely around the post,
and moved radially to permit of the adjusting drill to the required
place, and of drilling several holes near together without moving
the post. When an angular adjustment of the drill is required it is

page_text: accomplished by removing the collar L, when the ball-shaped journal i
permits the frame E to be vibrated or adjusted in any direction.
In Figure 8 I have represented an arrangement which I prefer to
employ for adjusting the position of the drill by traversing the radial
slotted arm F longitudinally across the top of the inner support G by
means of a screw spindle M carried by the arm F and actuated by a
winch handle N, the said screw spindle working in a fixed nut O on the
top of the inner support G. A rotatory adjustment of the same arm F
is accomplished by means of the worm P, carried in brackets on the
under sider side of the arm F, and gearing into the worm wheel Q fast
on the upper end of the inner support G, a winch handle R serving to
rotate the worm.
I also propose in some cases to substitute the clamp bearing S formed
on the side of the outer support H for the horizontal stud m herein-
before referred to, the said clamp bearing serving to hold the inner post
or support G when drilling parallel with the base, which arrangement
will be found useful in box-shaped articles, such as safes,. lathe beds, and
the like.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe in conclusion that what I con-
sider to be novel and original, and therefore claim as the Invention
secured to me by the herein-before in part recited Letters Patent is,―-
First. The peculiar driving apparatus, consisting of the frame B
carrying the grooved "idler" pulleys d and f, and rotating on the
stud C, held by the hanger A in such manner that the delivering
edge of the "idler" pulley d will always be in line with the receiving
edge of the driving pulley c, substantially as and for the purposes
herein-before described.
Secondly. The combination of the weighted frame D carrying the a
"idler" pulley g, with the rotating frame B and the driving pulley c,
substantially in the manner and for the purpose herein-before described.
Thirdly. The adjustable frame E carrying the ball-shaped journal i in
combination with the socket clamp j and drill spindle H, substantially
as and for the purposes herein-before described.
Fourthly. The combination of the radial slotted arm F, the stud 1,
the inside post G and the outside post H, substantially as and for the
purposes herein-before described.
3

page_text: Fifthly. The combination with the outside post H of the side stud m
or its equivalent (the clamp bearing S) for the purpose of enabling the
drill to be used parallel to the base or at an angle of 30 degrees or less
thereto, substantially as herein-before described.
In witness whereof, I, the said John Sprague, have to this my
Specification set my hand and seal, the 19th day of January
One thousand eight hundred and seventy-two.