An Improved Drilling Machine, specially applicable for Drilling the Wire Holes in the Sides of Sieves, Riddles, and the like.
Year: 1899

page_text: Date of Application, 9th Sept., 1899
Complete Specification Left, 9th June, 1900--Accepted, 11th Aug., 1900
An Improved Drilling Machine, specially applicable for Drilling the
Wire Holes in the Sides of Sieves, Riddles, and the like.
I, JAMES HENRY ATKINSON, of Hunslet Road, in the City of Leeds, in the
County of York, Ironmonger, do hereby declare the nature of this invention
to be as follows:-
This invention refers to a construction of drilling machine specially applicable
for drilling the holes to receive the ends of the wires forming the bottom of
sieves, riddles and the like; and is discribed hereunder with reference to such;
though as will be evident from the discription, it is suitable for drilling one or
more rows of holes in other articles, the holes being at a uniform distance apart,
and the axial directions of the holes respectively at right angles or other angles
to each other as may be desired.
A drilling machine constructed in accordance with my invention comprises
a compound sliding table surmounted with a turntable to receive the work, a
slide mounted or formed on the bed or frame of the machine, a drilling spindle,
mechanism for moving the table intermittently at right angles to the spindle,
and means for centering and holding the cylindrical wooden sides of the sieve
on the turntable.
The means for centring the cylindrical wooden sides of the sieve on the turn-
table consists of a vertical spindle, fixed centrally to and projecting above the
turntable. This spindle is screwed at its upper end, and carries a nut attached
to a hand wheel, by means of which it can be rotated, and thus raised and lowered
on the spindle. Immediately below this nut is a loose collar, which is pressed
upwards against the underside of the nut by a spiral spring, which surrounds
the vertical spindle. Three or more (conveniently two pairs of) arms uniformly
placed round the spindle, are attached at their upper ends by pin joints to the
said loose collar, and the outer lower ends of these centring and holding arms
A link is centred
are sharpened or serrated as desired for holding the work.
to a point below the centre of each of these arms, and passes down and is
hinged to lugs cast on the upper side of and close to the centre of the turn-
table. It will be evident that when the nut is rotated to move it downwards that
the arms open out, the lower or gripping ends moving uniformly outwards
from the centre of the spindle and at the same time in a downward direction:
so that they first of all move the cylindrical wooden side of the sieve to a central
position, and then draw and hold it tightly down on the table.
As in the case of sieves the wires running in one direction are situated
slightly above, (respectively below), the wires running at right angles to them,
it is necessary on finishing drilling the wire holes in one quadrant, to raise or
lower the table slightly before commencing to drill the holes in the next adjoin-
ing quadrant. For this purpose I arrange two vertical cams and corresponding
recesses on and in the top of the cross sliding table and the underside of the
turntable respectively; so that when the turntable rides upon the cams it is

page_text: correspondingly higher than when the recesses come over the cams and drop
on to them.
A notch and spring catch serve to retain the turntable in the
exact position.
The means for moving the table intermittently forward consist of a pin or
other suitable rack attached to the slide bed or frame of the machine close to
the bottom or longitudinal sliding table, (that is the lower part of the com-
pound sliding table), a spring pressed bolt having a bevelled end, a disengaging
pin or projection attached to the top or cross sliding table which carries the
turntable, and a weight attached by means of a cord passing over a pulley to
one end of the bottom sliding table, and tending to pull the table longitudinally
along the bed or frame slide of the machine. The direction of this slide is at
right angles to the drilling spindle.
The direction of the cross slide is parallel to the drill, and on drawing it
back with the work, the above mentioned disengaging pin or projection bumps
up against and pushes the spring bolt so far back, that the latter just clears the
rack pins or teeth; on which the before mentioned weight pulls the table
slightly forward. until stopped by the disengaging pin, (which is considerably
narrower than the spring bolt) catching against the rack pin which the spring
bolt has just cleared. This movement however is sufficient to ensure the spring
bolt entering the next space between the rack teeth when the disengaging pin
is withdrawn by the moving forward of the cross slide with the work up to the
drill. In this manner, the movement of drawing back and then pushing for-
ward the work from and up to the drill ensures the advance of the work by the
pitch of the rack pins at one time. Racks of corresponding pitch are used for
sieves of different mesh.
Where the wires of the sieve are required to cross one another at other than
right angles, say at 60 degrees, the positions of the cams on the top of the cross
slide and of the recesses in the underside of the turntable are correspondingly
altered.
Dated this 8th day of September 1899
J. CLARK JEFFERSON.
30, Park Row, Leeds, Agent for Applicant.
An Improved Drilling Machine, specially applicable for Drilling the
Wire Holes in the Sides of Sieves, Riddles and the like.
I, JAMES HENRY ATKINSON, of Hunslet Road, in the City of Leeds, in the
County of York, Ironmonger, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention refers to a construction of drilling machine specially applicable
for drilling the holes to receive the ends of the wires forming the bottom of
sieves, riddles and the like; and is described hereunder with reference to such:
though as will be evident from the description, it is suitable for drilling one or
more rows of holes in other articles, the holes being at a uniform distance apart,
and the axial directions of the holes respectively at right angles or other angles
to each other as may be desired.
A drilling machine constructed in accordance with my invention, comprises
a compound sliding table surmounted with a turntable to receive the work, a
slide mounted or formed on the bed or frame of the machine, a drilling spindle,
mechanism for moving the table intermittently at right angles to the spindle,

page_text: and means for centring and holding the cylindrical wooden sides of the sieve
on the turntable.
The means for centring the cylindrical wooden sides of the sieve on the turn-
table consists of a vertical spindle, fixed centrally to and projecting above the
turntable. This spindle is screwed at its upper end, and carries a nut attached
to a hand wheel, by means of which it can be rotated, and thus raised and lowered
on the spindle. Immediately below this nut is a loose collar, which is pressed
upwards against the underside of the nut by a spiral spring, which surrounds
the vertical spindle. Three or more (conveniently two pairs of) arms uniformly
placed round the spindle, are attached at their upper ends by pin joints to the
said loose collar, and the outer lower ends of these centring and holding arms
are sharpened or serrated as desired for holding the work. A link is centred
to a point below the centre of each of these arms, and passes down and is
hinged to lugs cast on the upper side of and close to the centre of the turn-
table. It will be evident, that when the nut is rotated to move it downwards,
the arms open out, the lower or gripping ends moving uniformly outwards
from the centre of the spindle and at the same time in a downward direction;
so that they first of all move the cylindrical wooden side of the sieve to a central
position, and then draw and hold it tightly down on the table.
As, in the case of sieves, the wires running in one direction are situated
slightly above, (respectively below), the wires running at right angles to them,
it is necessary on finishing drilling the wire holes in one quadrant, to raise or
lower the table slightly before commencing to drill the holes in the next adjoin-
ing quadrant. For this purpose I arrange two vertical cams and corresponding
recesses on and in the top of the cross sliding table and the underside of the
turntable respectively; so that when the turntable rides upon the cams it is
correspondingly higher than when the recesses come over the cams and drop
on to them. A notch and spring catch serve to retain the turntable in the
exact position.
The means for moving the table intermittently forward consist of a pin or
other suitable rack attached to the slide bed or frame of the machine close to
the bottom or longitudinal sliding table, (that is the lower part of the com-
pound sliding table), a spring pressed bolt having a bevelled end and a dis-
engaging pin or projection, both carried by the longitudinal sliding table, a
bumper or pusher attached to the cross sliding table, and a weight, attached by
means of a cord passing over pulley to one end of the bottom sliding table,
and tending to pull the table longitudinally along the bed or frame slide of the
machine. The direction of this slide is at right angles to the drilling spindle.
The direction of the cross slide is parallel to the drill, and on drawing it back
with the work, the above mentioned disengaging pin or projection bumps up
against and pushes the spring bolt so far back, that the latter just clears the
rack pins or teeth; on which the before mentioned weight pulls the table.
slightly forward, until stopped by the disengaging pin, (which is considerably
narrower than the spring bolt), catching against the rack pin which the spring
bolt has just cleared. This movement however is sufficient to ensure the spring
bolt entering the next space between the rack teeth when the disengaging pin
is withdrawn by the moving forward of the cross slide with the work up to the
drill. In this manner, the movement of drawing back and then pushing for-
ward the table f by hand, that is when moving the work from and up to the
drill ensures the advance of the work by the pitch of the rack pins at one time.
Racks of corresponding pitch are used for sieves of different mesh.
Where the wires of the sieve are required to cross one another at other than
right angles, say at 60 degrees, the positions of the cams on the top of the cross
slide and of the recesses in the underside of the turntable are correspondingly
altered.
And in order that my invention and the manner in which the same is to be

page_text: performed may be more readily and clearly understood I have annexed hereto
the accompanying drawings illustrating a drilling machine constructed in
accordance with my invention.
In these Fig. 1 is a plan, Fig. 2 is a half side elevation and half longitudinal
section, Fig. 3 is an end elevation with parts shewn in cross section. Fig. 4 is
a plan to a larger scale of the feed device. In all the figures the same reference
letter refers to the same or corresponding part.
a indicates the frame of the machine, formed with two longitudinal parallel
vee slides b.
c is a longitudinal sliding table, mounted on wheels d, arranged to run in
the slides b.
The table c is formed with cross vee slides e on its upper side.
f is a cross sliding table, mounted on wheels g, arranged to run in the
slides e.
his a turn table, fitted with its boss i in the boss j cast on the cross sliding
table.
indicates the sieve to be drilled.
7 is the drill spindle, carried in the boss of a bracket m, which latter is secured
to the frame a of the machine at the back. The drill spindle is rotated by a
rope or cord passed round the grooved pulley at the back of the machine.
o is a fixed vertical spindle, secured centrally in the boss of the turntable,
and screwed over its upper half. is a hand wheel, the boss of which is formed
as or carries a nut q, fitting the screwed part of the spindle o.
is a loose collar, fitting over the screwed part of the spindle o, so that it can
slide vertically up and down over the screw threads. is a spiral spring which
constantly tends to press the collar against the underside of the nut q.
are the radial arms, hinged to lugs on the loose collar . and the lower
ends of which may be sharpened or serrated to assist in holding the work.
are links, hinged to the centring and holding arms t, at a point slightly
below the centre of the arms t. and at their opposite lower ends to lugs w, cast
on the top of the turntable. The object of attaching the links to the centring
and holding arms at a point below the centre of the latter, is to obtain not only
an outward centring movement of the ends of the arms t, but also a slowly down-
ward holding movement.
indicate the curved raised cam surfaces on the upper side of the top cross
traversing table, and y indicates the corresponding recesses in the underside of
the turntable h. When the turntable is placed as shewn in the drawing, so
that the recesses y are not immediately over the raised surfaces c, then the turn-
table h is in its higher position, that is resting with its under surface on the
top of the raised cam surfaces; whilst if the turntable his moved round
90 degrees so as to bring the said recesses and cams directly opposite, the turn-
table drops so as to rest with its under surface on the upper surface of the
cross sliding table f. In this manner provision is made for drilling the row of
holes for the wires (of the sieve) running in one direction at a slightly higher or
lower level than those for the wires running at right angles to the first.
1 is a pin rack, secured to the front side of the machine. 2 is a curved
bracket, secured to a projecting lug at one of the front corners of the bottom
or longitudinal traversing table c. and carrying a spring pressed bolt 3. the
front portion of which is hevelled as shewn at 4 Fig. 4. 5 is a small knob
handle, so as to be enabled to draw back the bolt 3 out of contact with the
pins of the rack, which is necessary when it is desired to move the longitudinal
sliding table by hand. Immediately in line with the spring pressed bolt 3, and
likewise attached to the longitudinal sliding table e. is a second spring pressed
bolt 6 the front end of which is formed as a deep flat pusher 7: which at the
proper time pushes against the bevelled end 4 of the bolt 3. The tendency of
the spring behind the bolt head 3 is to keep the bolt head pressed up against
or towards the pin rack, whilst the tendency of the spring behind the second
bolt or flat pusher 6 is to keep this out of contact with the pin rack.

page_text: 8 is a hanging lug, bolted to the side of the cross traversing table f, and
coming deep enough to catch the projecting end of the bolt 6.
10 is a weight, suspended by means of a cord 11, passed over the guide
pulley 12, carried by a bracket 9: the opposite end of the cord being attached
to the longitudinal traversing table c, so that the weight pulls forward the
longitudinal traversing table c, whenever the latter is freed.
The direction of the movement of the cross traversing table f being parallel
to the axis of the drill; on drawing the table f, and with it the work, from the
drill, the bottom of the hanging lug 8 bumps against the projecting end of the
bolt 6, and causes the flat pusher 7 to strike against the bevelled face 4 of the
bolt 3; forcing back the latter beyond the rack pin 13; and at this moment
the weight 10 draws forward the longitudinal sliding table c, until the rack
pin 13 catches against the flat side of the pusher, 7. This longitudinal movement
is sufficient to bring the point of the bevel of the bolt 3 into the next space
between the rack pins, and on moving forward the cross slide f with the turn-
table h and work thereon up to the drill, the pressure of the spring behind the
bolt, 3, forces this up; and the bevelled side 4 of the bolt 3 pressing against
the rack pin forces the longitudinal sliding table e to complete the longitudinal
pitch movement or feed.
In this manner the mere moving up of the work to the drill and its with-
drawal causes the intermittent automatic feed of the machine.
By means of notches 14 in the edge of the turntable, and a flat spring 15
attached to the cross sliding table, the turntable is locked in position during the
drilling operation.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is: -
1. The combination of compound sliding and turning table, linked radial arms
for centring and holding the work on the table, rack engaging and disengaging
device and suspended weight connected to the longitudinal traversing table for
feeding forward the work, and drill spindle carried in fixed bearings, all sub-
stantially as and operating as and for the the purpose or purposes set forth.
2. In machines for drilling holes for the wires of sieves and the like, the
combination of, a longitudinal and cross sliding table, a turntable fitted in the
latter, and a vertical spindle with linked centring and holding arms, the cross
sliding table and the turntable having respectively raised cams and recesses,
and the centring and holding arms attached to links, so that the outer ends of
the arms are moved uniformly not only outwards but downwards, all substan-
tially as and operating as and for the purposes herein set forth.
3. In machines for drilling the holes for the wires of sieves and the like, the
device for obtaining an intermittent feed merely by the movement of the table
carrying the work to and fro, up to and from the drill, substantially as herein
set forth and illustrated more particularly by Fig. 4 of the accompanying
drawings.
4. The means for centring and holding down the work substantially as set
forth and illustrated.
J. CLARK JEFFERSON,
30, Park Row, Leeds, Agent for Applicant.