Improvements in Drilling Machines.
Year: 1892

page_text: Date of Application, 13th Apr., 1892
Complete Specification Left, 13th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Drilling Machines.
I, DANIEL JONES of 62 Albion Street, Birmingham, in the County of Warwick,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to multiple drilling machines constructed with two
or more spindles adapted to drill, simultaneously or alternately, holes having some
determined relative positions in the work to be operated upon. One object of the
invention is the placing of the spindles closer together than heretofore has been
usual and dispensing with gearing and frictional contact in connecting such spindles.
For this purpose any desired number of spindles are fixed (with their axes
parallel) in a suitable frame at distances apart agreeing with those of the holes to
be drilled in the work to be operated upon. Euch spindle is provided with a crank
and crank pin at the reverse end to that which carries the drill, these cranks
having a common throw. Over the crank pins is placed a wrist plate having holes
or bearings formed in it, whose positions correspond with those of the crank pins
on the ends of the drill spindles. With this arrangement if one of the spindles be
rotated, the wrist plate will cause all the cranks connected to it to rotate in the
same direction and at the same speed. Instead of driving all the spindles by
rotating one of their number, I consider it advantageous to provide an independent
crank (having the same throw), engaging with the wrist plate at or about the centre
of the system or group of cranks. This independent crank is fixed on a spindle
carried in a frame and is provided with a pulley adapted to receive motion by
means of a belt or otherwise. The several drill spindles being thus connected
together, will be driven from what I have called the independent crank. In cases
where only two working spindles are needed it will be advantageous to provide
idle cranks so that there may be at least three cranks driven from the one driving
crank in the manner described.
Another object of this invention is the operating of the feed motion. By means
of a single shaft one or more pairs of drill carrying heads is or are caused to
advance and retreat, the second pair being at right angles to the first pair. For
this purpose a shaft is fixed in bearings parallel with one pair of the drill carrying
heads. One end of this shaft is formed with a right hand screw, and the other
with a left hand screw. Each end of the screw is provided with a suitable nut,
and these nuts are fixed to one pair of drill carrying heads. When this shaft is
rotated in one direction, the heads constituting a pair connected to the nuts on the
screws formed on the said shaft are caused to approach each other, and when the
motion of the said shaft is reversed, the heads recede from each other. A second
pair of drill carrying heads may be arranged to move on ways at right angles to
the shaft; these heads are caused to advance and recede from each other, by a
crown wheel fixed on the shaft and partaking of its motion, as it is rotated backward
and forward; these last mentioned heads are connected to the crown wheel by a
rack, or a pair of racks, in gear with opposite sides of the crown wheel, thus the
heads are caused to advance and recede in the same manner as those constituting
the pair operated by the nuts on the ends of the same shaft. A friction disc and
crank with connecting rods, can be advantageously substituted for the crown wheel
and racks; the arrangement being such as to produce a similar effect.
Furthermore this invention has reference to a method of tripping and reversing
the motion of the drill carrying heads, so that the drills are caused to advance, and
after completing their work to return automatically to their starting point. To
this end there is provided at each end of the screw shaft a band pulley able to
rotate on the shaft, and to be connected therewith by means of friction discs or

page_text: jaw clutches so as then to rotate with the shaft. By suitable means these pulleys
are driven in opposite directions; one may be driven by an open belt, the other
by a crossed belt. The pulleys are made to alternately engage with and rotate
the shaft. An arrangement for this purpose is as follows:-In the frame of the
machine is a bearing adapted to carry a toggle joint that is in alignment with the
axis of the beforementioned screw shaft. When the toggle joint is straightened
the friction discs of the pulleys, or the jaws of the clutch are pressed into contact,
and the screw shaft is rotated in the same direction as the pulley that is connected
to the shaft for the time being. When the toggle joint is bent, the clutch is released
and the pulley ceases to communicate its motion to the shaft. The toggles at cach
end of the shaft are connected together by a connecting rod, in such a manner that
when one pulley is engaged the other is cut of gear. The action of the toggle is
to cause the clutch to remain in gear until it is tripped by a rod and catch
connected with the drill carrying heads running on the ways. In order that the
trip motion shall act completely, a third toggle or pair of toggles is connected to
the connecting rod. A spring is attached to this third toggle joint, so that the
toggles can be forced from a bent position on the right to a bent position of a
similar angle on the left. In passing from one position to the other it will be
evident that the effort of the spring will be exerted in opposite directions, and this
effort of the spring toggles will operate to strike the clutch toggles completely in
or out of gear as they or the connecting rod is struck by the trip rod from one
side of its centre to the other.
As will be evident apparatus according to my invention may be variously
arranged. In practice the various parts would be arranged to suit the require-
ments of the special work intended to be done. In setting forth the nature of my
invention I have described it as it would be applied in the construction of a
machine having two pairs of heads adapted to move at right angles to each other
but it might be desirable to construct machines with several pairs of heads at
various angles to one another.
Dated this 13th day of April 1892.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Drilling Machines.
I, DANIEL JONES, of 62 Albion Street, Birmingham, in the County of Warwick,
Engineer, 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 has reference to multiple drilling machines constructed with two
or more spindles adapted to drill, simultaneously or alternately, holes having some
determined relative positions in the work to be operated upon. One object of the
invention is the placing of the spindles closer together than heretofore has been
usual, and dispensing with gearing and frictional contact in connecting such
spindles. For this purpose any desired number of spindles are fixed (with their
axes parallel) in a suitable frame at distances apart agreeing with those of the
holes to be drilled in the work to be operated upon. Each spindle is provided with
a crank and crank pin at the reverse end to that which carries the drill, these
cranks having a common throw. Over the crank pins is placed a wrist plate
having holes or bearings formed in it, whose positions correspond with those of the
crank pins on the ends of the drill spindles. With this arrangement if one of the
spindles be rotated, the wrist plate will cause all the cranks connectel to it to
rotate in the same direction and at the same speed. Instead of driving all the

page_text: spindles by rotating one of their number. I consider it advantageous to provide an
independent crank (having the same throw), engaging with the wrist plate at or
about the centre of the system or group of cranks. This independent crank is
fixed on a spindle carried in a frame and is provided with a pulley adapted to
receive motion by means of a belt or otherwise. The several drill spindles being
thus connected together, will be driven from what I have called the independent
crank. In cases where only two working spindles are needed it will be advan-
tageous to provide idle cranks so that there may be at least three cranks driven
from the one driving crank in the manner described.
In the accompanying drawings,
Figs. 1, 2 and 3 are respectively front, plan and end views of a multiple drilling
machine constructed according to this invention, Fig. 3 being drawn to a larger
scale than Figs. 1 and 2.
Figs. 4 and 5 are enlarged detail views showing one of the wrist plates and the
corresponding set of cranks carried by the drill carrying head 2.
Figs. 6 and 7 are similar views to Figs. 4 and 5 showing like parts carried by the
drill carrying head 4.
1, are the drill carrying spindles arranged in sets and mounted to rotate in
drill carrying heads of which there are three in the example shown, viz. 2, 3 and 4.
These spindles may be of different lengths and be arranged with their axes at
equal or unequal distances apart to suit the nature of the work to be done. In the
example shown the set of drills carried by the head 4 are arranged with their axes
at equal distances apart, the sets carried by the heads 2 and 3 being arranged with
their axes at unequal distances apart. Each of the drill spindles 1 is provided
with a crank 5 the cranks being all of equal throw. Each set of drill spindles is
provided with a wrist plate 5 in which are formed bearings for the crank pins of
the several cranks of the set. When the drill spindles are arranged at unequal
distances apart, idle spindles such as 1ª and 1° may advantageously be used, each
provided with a crank the pin of which is journailed in the corresponding wrist
plate (Figs. 4 and 5). These idle spindles and cranks serve to balance the wrist
plate. 5 is a driving spindle carrying a crank 6 of the same throw as the cranks 5
and the pin of which is also journalled in the wrist plate 5". The crank 6 may, when
required, be provided with a balance weight 6 as shown in Figs. 6 and 7 to
counterbalance the wrist plate. 7 is a driving pulley fast on the driving spindle 5b.
With the arrangement described it will be seen that all the drill spindles of a set
can be simultaneously rotated in the same direction and at the same speed from &
single driving shaft, thereby simplifying the construction of multiple drilling
machines as compared with such machines as heretofore usually constructed.
The drill carrying heads 2 and 3 are mounted to slide on fixed longitudinal guide
rods 8 and the drill carrying head 4 is arranged at right angles to the others and is
similarly mounted to slide on fixed transverse guide rods 8°. These heads, between
which the work to be drilled is fixed in any convenient manner, are caused to
advance and retreat in an automatic manner and in directions at right angles to
each other by feed mechanism constructed and operating as follows
9 is a shaft mounted in bearings 10 in the frame of the machine and arranged
parallel with the guide rods 8 supporting the pair of the drill carrying
heads 2 and 3. One end of this shaft is formed with a right hand screw 9" and the
other with a left hand screw 9b. On these screws work nuts 2 and 3 respectively
that are fixed to the drill carrying heads 2 and 3. When this shaft is rotated in
one direction the heads 2 and 3 connected to the nuts 2 and 3ª will be caused to
approach each other, and when the motion of the said shaft is reversed, the heads
will recede from each other. The drill carrying head 4 which in the construction
shown is arranged to move on guide bars at right angles to the shaft 9 is caused
to automatically advance and recede at the required times by means operated from
the shaft 9. A simple and convenient means for this purpose comprises a lever 11
pivoted at 12 and formed with a slot 13 having an inclined portion 13ª and into
which takes a pin 14 carried by the head 2, the arrangement being such that whilst

page_text: the said pin is moving in the straight portion of the slot, the lever and consequently
the head 4 with which it engages are stationary, but when the pin enters the
inclined portion 13" of the slot the lever will be operated in one direction or the
other, according to the direction in which the head 2 and pin 14 are for the time
being moving, and will cause the head to then advance or recede simultaneously
with the forward or backward movement of the heads 2 and 3.
To trip and reverse the motion of the drill carrying heads, so that the drills will
be caused to advance, and after completing their work to return automatically to
their starting point, there is provided at each end of the screw shaft 9 a band
pulley 15 free to rotate on the shaft, and to be connected therewith by means of
friction discs or jaw clutches so as then to rotate with the shaft. By suitable means
these pulleys are driven in opposite directions; thus one may be driven by an open
belt and the other by a crossed belt. An arrangement for causing the pulleys to
alternately engage with and rotate the shaft is as follows:-
At opposite sides of each pulley 15 are arranged two clutch plates 16 and 16
that are keyed upon the shaft 9 and whereof 16 is capable of slight endways
movement on such shaft. Corresponding to each clutch 16 is a lever 17 journalled
in brackets 18 carried by the framework of the machine and provided with a toggle
arm 19 in the form of an adjustable screw socket. Between each toggle arm 19
and the corresponding clutch plate 16 is another toggle arm 20 the ends of which
are suitably mounted in the toggle arm 19 and clutch plate respectively. 21 is a
link connecting the lower ends of the levers 17. 22 and 23 are adjustable stops
carried by a fixed bar 24 and between which a block 25 carried by the upper end
of the left hand lever 17 is arranged to work.
The arrangement is such that when both levers 17 are in the positions shown in
Fig. 1 so that both toggle arms 20 are equally inclined to the horizontal, both
pulleys 15 will be free to be rotated in opposite directions without rotating the
shaft 9. If however the bar 21 be moved to the right by the handle 17 until the
block 25 comes in contact with the stop 22, the toggle aims 19 and 20 at the left
hand side of the machine will become more inclined to the horizontal, whilst the
toggle arms at the right hand side will be caused to become horizontal or practically
so thereby causing the corresponding clutch plate 16 to press the right hand
pulley 15 against the clutch plate 16" with the result that the pulley will be gripped
between the clutch plates and its motion transmitted to the shaft 9 so as to rotate
it in a direction to move the heads 2 and 3 towards each other. When the bar 21
is moved in the opposite direction so as to bring the block 25 in contact with the
stop 23 the right hand toggle will be put out of action and the left hand one
brought into action so that the shaft 9 will then be rotated in the opposite
direction by the left hand pulley 15 and the heads 2 and 3 will be moved apart.
The head 4 is during these operations actuated at the required times from the
head 2 by the lever 11 in the manner herein before described.
To cause the bar to be moved to the left at the required times to automatically
effect the return movement of the heads, the following mechanism may be
employed. 26 is a bell crank lever pivoted at 26" to the left hand brackets 19.
The lower depending arm of this lever is connected by a pin or slot connection 27
to the link 21, The other arm of the lever carries a pin or roller 28 adapted to
travel upon a bar or shelf 29 fixed to the nut 2". 29 is a spring encircling a rod 30
carried by a projecting part 21" of the link 21. One end of the spring acts against
this projection and the other end against an extension 3 of the nut 3" through
which the rod 30 works when the extension moves endways with the said nut.
a rod fixed to the head 2 and adapted when the head moves to the left, to act
against the upper end of the left hand lever 17 and move this lever as well as the
right hand lever into the inoperative positions shown in Fig. 1. As will be seen
the arrangement is such that when the link 21 is moved to the right by the
handle 17 to cause the heads 2 and 3 to approach each other in the manner
hereinbefore described, the pin or roller 28 will be raised above the bar or shelf 29
which will then prevent the bell crank lever and the link 21 being moved in the
31 is

page_text: opposite direction by the spring 29 which will be compressed by the extension 3b
whilst the heads 2 and 3 are approaching each other. When these heads have
completed their forward movement the pin or roller will slip off the outer end of
the bar or shelf 29 thereby leaving the spring 29 free to move the link 21 to the
left and cause the heads to make their outward or return movement as herein before
described. When this movement has been nearly completed the rod 31 will act
against the upper end of the left hand lever 17 and upon continued movement of
the heads will move both levers 17 in the positions shown in Fig. 1 in which both
clutches are rendered inoperative and the heads will be brought to rest.
To enable the shaft 9 to be driven when necessary at a slower rate than can be
obtained by the pulleys 15, it is or may be provided with a worm wheel 32, (Figs. 1
and 3) gearing with a worm 33 on a shaft 34 journalled in the frame work of the
machine and provided with a pulley 35 by means of which it can be driven by a
band from a corresponding pulley 36 fixed on the driving shaft 5 carried by the
head 4. 37 is a hinged work plate to which the article to be drilled is secured.
As will be evident apparatus according to my invention may be variously
modified. In practice the various parts would be arranged to suit the require-
ments of the special work intended to be done. The multiple drilling machine
shown, is adapted for drilling holes in the bed and fixed parts of a sewing machine,
but it can obviously be adapted for drilling other articles. In explaining the
nature of my invention I have described it as it would be applied in the construc-
tion of a machine having three heads one of which is adapted to move at right
angles to the other which constitutes a pair, but it might be desirable to arrange
the heads to work at other angles to each other and to construct machines with two
or more pairs of heads.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
1. A multiple drilling machine in which drill spindles are mounted in a drill
carrying head with their axes parallel and are each provided with a crank and
crank pin, the cranks being of equal throw and the crank pins being journalled in
a common wrist plate, so that by rotating one of the drill spindles or by operating
the wrist plate by a crank of the same throw as the cranks on the drill spindles,
the wrist plate will cause all the drill spindles to rotate in the same direction and
at the same speed substantially as herein described.
2. A multiple drilling machine constructed with reciprocating drill carrying
heads arranged to move to and from each other or in directions inclined to each
other, and reciprocated from a single shaft that is caused to rotate alternately in
opposite directions by moving wheels that are brought into action alternately by
clutch mechanism substantially as herein described for the purpose specified.
3. In a multiple drilling machine the combination with a pair of drill carrying
heads, of a rotary shaft formed with right and left handed screw threads engaging
with nuts carried by the respective heads, driving wheels or pulleys mounted to
freely rotate on the said shaft and adapted to be rotated in opposite directions,
clutches adapted to connect each of the said driving wheels or pulleys to the shaft,
and toggle mechanism for bringing each of said clutches alternately into action
substantially as hereinabove described for the purpose specified.
4. In a multiple drilling machine of the kind referred to in the preceding
claim, the combination with connected levers for operating the toggle and clutch
mechanism of a tripping device carried by one of the drill carrying heads,
a spring, and means for holding the toggle and clutch mechanism stationary
during the advancing movement of the said heads, the arrangement being
such that the spring will be gradually compressed until the heads have com-
pleted their advancing movement whereupon the holding device will be released
and permit the spring to actuate the toggle and clutch mechanism in such a manuer
as to reverse the motion of the said drill carrying heads, and when the heads have

page_text: nearly completed their return movement the tripping device will act to move the
toggle and clutch mechanism into such a position as to throw the driving mechanism
out of action and bring the heads to rest substantially as herein described.
5. My improved multiple drilling machine constructed, arranged, and operating
substantially as described and shown.
D: 19th dex of Jonry 1893
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Applicant's Agent.