Improvements in Multiple Drills or Boring Machines.
Year: 1890

page_text: Date of Application, 9th Oct., 1890
Complete Specification Loft 6th Feb. 1891 Accented 14th Mar
1001
PROVISIONAL SPECIFICATION.
Improvements in Multiple Drills or Boring Machines.
CHARLES WALTER VOSPER, of 5. Woodland Terrace, Ashleigh Road,
Barnstaple, in the County of Devon, Engineer, and WILLIAM CLAUDE RAFAREL,
of the Barnstaple Foundry, Barnstaple, in the County of Devon, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention consists of a number of drills being fixed in a round frame with
the points directed from the outer edge towards the centre in such a manner that
all the holes in the hub of a bicycle or other work where holes are required in a
circle or a portion of a circle can be bored at one time.
The drills will be made to revolve by means of a bevelled gear wheel being
placed on each of them, these are driven by other gear wheels placed on the ends.
of spindles at a right angle to them. The latter spindles are passed through a
frame where the drills are fixed and receive their motion from one large cog wheel
placed in the centre at the back of the frame which will be fitted to as many spur
wheels on the ends of the spindles as there are drills, or it may be preferable to
drive them by means of bevilled cranks being placed on the ends of the spindles
which will be inserted in a crank plate or disc and secured to the main or driving
shaft of the machine. It may be preferable at times to use jointed spindles instead
gear wheels and we propose to do this where it is intended to work spindles or
drills in a semicircular position for the purpose of boring brush blocks &c., in the
latter it would not be necessary to make a complete circle but to impart motion to
spindles that cannot be made to work at the same augle with those in the same
group, whether they may be fixed in a frame as described above or in an ordinary
frame suitably adapted for the class of work for which it may be intended.
instance the group of spindles fixed for boring. brush blocks can by means of
those jointed spindles be made to work at various angles so as to give the
necessary spread to the brush and their position easily changed according to
requirements.
of
Din 01h date of October 1900
As an
C. W. VOSPER.
W. C. RAFAREL.
COMPLETE SPECIFICATION.
Improvements in Multiple Drills or Boring Machines.
We, CHARLES WALTER VOSPER, of Barnstaple, in the County of Devon,
Engineer, and WILLIAM CLAUDE RAPAREL, of the Town and County aforesaid,
Mechanical 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:—
Our present invention relates to multiple drills or boring machines and has for
its object to construct a new or improved machine which will drill a number of holes
radially towards a centre or at varying angles simultaneously in effecting the said
object therefore we employ any number of drills corresponding to the number of
holes required to be drilled or bored and we secure said drills to a corresponding
number of spindles which we support in either a circular or partly circular frame
in such a inanner that the points of the drills are directed or extend towards-
where desired-one common centre in such a manner for instance that all the radial
holes in the hub of a bicycle wheel or other similar article where such holes are

page_text: required may be drilled or bored at one operation. The several drills may be
revolved by means of a bevelled gear wheel being secured to a suitable part of each
drill spindle and each said bevel wheel is driven by another bevel gear wheel secured
to the end of a shaft which runs at right angles with the drill spindles each said
shaft being carried in a circular or partly circular frame. The several shafts afore-
said may be driven from one large cog or friction wheel which meshes or gears with
the smaller wheels or pinions one of which latter is fixed to the end of each
shaft which extends through the circular or partly circular frame.
The large cog spur or frictional wheel is carried at the back of the frame and
is supported upon a driving shaft which has keyed or otherwise secured thereto
either a fast and loose pulley or is arranged in any ordinary manner for receiving the
transmission of the power necessary to drive the whole of the spindles and work the
drills for the special purpose for which they may be employed. Where desirable
the, several shafts which drive the bevel gear may be driven by means of bevel
cranks one said bevelled crank being coupled or connected direct to each spindle
or shaft and the opposite end of each said bevelled crank bears in a crank plate or
disc which is caused to revolve by means of a crank, or eccentric which is secured
to the driving shaft at the back of the frame and in this arrangement the large
spur or friction wheel and pinions aforesaid are dispensed with. In cases where it is
desired to drill or bore holes radially but at varying angles we find it desirable to
use jointed drill spindles and flexible connections and to dispense with the bevel
gear wheels.
For instance where it is intended to work the drill spindles and
drills in a semicircular position for the purpose of boring brush blocks or backs or
for other similar purposes we drive the requisite number of spindles direct by
means of bevel cranks and we use a corresponding number of jointed spindles con-
nected thereto by the flexible connections aforesaid so that the said jointed spindles
may be set at varying angles.
We find that it is also desirable to allow the spindles to be easily adjusted from
time to time in accordance with the varying distances apart of the holes to be bored
or drilled and for this purpose we place the several, driving spindles parallel and
employ an expansion motion which will either move all said spindles, uniformly or
at varying distances to suit the special distances apart of the holes required as will
be well understood. In order that our present improvements may be more fully
understood and so that they may be readily carried into effect we will proceed to
further describe the same by the aid of the accompanying drawings.
Fig. 1 is a front elevation and Fig. 2 a cross sectional elevation of one form of
our improved machine which we employ for drilling a number of holes simul-
taneously in for instance the hub of a bicycle wheel or for other like purposes and
Figs. 2 and 3 are cross sectional elevations-the first two in detail-of modifi-
cations of said invention. Fig. 4 is a sectional elevation of our improved machine
modified so as to become adaptable for drilling a number of holes simultaneously
in a brush block for instance and for other similar purposes and Fig. 5 is a part
sectional elevation of a modification of a similar machine. Fig. 6 is a front
elevation and Fig., 7 a cross sectional plan taken on line . . of Fig. 6 of a modification
of the machine shown at Fig. 4 whereby the centres of the driving spindles may
be varied at uniform distances and Fig. 8 is a cross sectional plan or represents a
similar view to Fig. 7 but illustrates a means of varying the centres of the driving
spindles to different distances apart. Like letters of reference denote corresponding
parts in each view.
Referring to Figs. 1 and 2 the drill spindles A are carried radially within a
circular frame B which is preferably made in one casting as shown. The drill
spindles A pass through the threaded sleeves which latter screw through the
nuts C arranged in the grooves c¹. At the bottom of the said groove c¹ is arranged
or placed an annular rack D which meshes or gears with each nut C the latter
being constructed with suitable teeth on their outer peripheries for the purpose.
Each spindle A has a long keyway a³ and a key is secured to each bevel wheel E

page_text: and rests in said keyway a³ so that the bevel wheels E will drive the spindles A.
The shafts G are carried in the frame B either at right or any other suitable angles
to the spindles A and at one end of each said shaft G is secured a bevel wheel H
which drives and gears with the bevel wheel E. The several shafts G may be
driven by means of the pinions J and large cog wheel K as shewn at Fig. 2 or they
may be driven by means of bevel cranks g' as shewn at Fig. 3 or when desired the
spindles A and wheels E may be simultaneously driven from one large driving
wheel such as K¹ shown in detail view Fig. 2 in which case the wheels H and J
are dispensed with or the drill spindles A may be arranged with wheels such as
shown at E Fig. 2B in order that they will drive each other in which case it will
only be necessary to drive one of said wheels E¹ but the drills M will revolve in
opposite directions,
In order to give a simultaneous feed to the several drills M we arrange a spindle H³
which bears in or is carried by the frame B and which has secured at one end
thereof a suitable handle hand at the other end a bevel pinion ³ which latter
meshes or gears with the annular rack D. By turning the handle h¹ one way the
spindle His turned and the pinion will cause the annular rack D to revolve
and so simultaneously turn all the nuts C and thus cause the screwed sleeves a¹ to
force the drill spindles A and the drills M radially towards the centre of the
frame A so that the drills M are all fed to their work simultaneously and it will be
obvious that by turning the handle h in the opposite direction the several drills M
will recede from the centre of the frame A and may thus all be simultaneously
withdrawn from their work. Referring to Fig. 4 we carry a number of shafts or
spindles a in the frame B and drive the same simultaneously by means of the bevel
cranks g' the upper ends of which bear in the plate or disc g the said plate g² being
driven by an eccentric or crank plate g' which latter is pinned to the disc g³ the
said disc g being secured to the driving shaft O. The drill spindles A are jointed
as shown and are supported by the frames or carriers 3 and 6. Each said spindle A
is connected or coupled up to its corresponding vertical or other spindle or shaft a+
by means of a flexible connection a³.
This machine is inore especially adapted for drilling a number of holes at one and
the same time in a brush block or back for instance as by means of arranging the
spindles A to bear in the supports or carriers 6ª and connecting the said jointed
spindles A to the driving spindles or shafts a' in the manner shown the drills M may
be conducted to any required angle. In this machine no mechanical feed to the
spindles A is necessary as it is preferable to press the brush block or back up to the
drills M.
Referring to Fig. 5 the spindles A are carried in the segmental frame B and in
this arrangement each spindle A is constructed hollow and receives a rod a' which
is employed for adjusting the length of the drill M for which purpose the said
rod a is screwed into the upper part of the hollow spindle A and has a thumb
and finger head a for the purpose of adjustinent by the band of the operator.
The several shafts G may be driven from the back of the machine either in a
similar manner to that shown and described with reference to Fig. 2 or by means of
bevil cranks glas shown at Fig. 3. Each hollow spindle A receives a nut C which
rests or is supported in the segmentally formed groove c¹. In this case there is no
annular rack required but each nut is made in the form of a tapered cog wheel
and gears one with the other as shown. It will be obvious therefore in order that
the drills M may be fed simultaneously in one direction or similarly withdrawn in
another the screwei sleeves which surround each alternate hollow spindle A
must have a right handed thread and the screw sleeve a which surrounds each
intermediate hollow spindle A has a left handed thread.
The whole of the drills M. are therefore either ied or withdrawn simultaneously
by means of the handle, spindle H and pinion by manipulating the same in a
similar manner to that described with reference to Fig. 1.
Referring to Figs. 6 and 7 which represent modifications of the machine shown

page_text: at Fig. 4 which modifications consist of arranging the spindles A so that they may
be varied with respect to their distances apart from time to time to suit the special
purpose for which the drills may be required and in order to attain this we
arrange the frame B with two bearing portions and 6 respectively. The
bearing portion 1 carries or supports bosses or bearings b and the bearing
portion carries or supports bosses or bearings 63 the said bosses 6 and 63 being
secured to fixed positions by means of set screws S or where preferred merely by
the cover plates 6s in which case the screws S will not be required. Between the
bearing portions 61 and 62 we arrange and attach to the several spindles or shafts a
an expanding motion as follows: Each spindle or shaft a passes through a lever R
which is arranged with a deepened boss portion 1 for the purpose. The ends 2
of the rods or levers R are connected to a radial bar T by means of pins t¹ and the
ends of said bars I are connected to links Q by means of pins q'. The link Q
at one end is coupled up to the spindle or shaft a' in the manner shown and the
rod R at the opposite end is extended so as to form a suitable handle 4 in order
to manipulate the said expanding motion thereby.
The plate 2 in this machine is formed with a slot go and the ends of the bevel
cranks g which revolve thereby fit into suitable adjustable bushes g' which are
fixed in position by means of the set screws S or held in position by means of
a plate cover. When it be desirable to spread the centres of the spindles or
shafts the several set screws S are unloosened or the cover plates 68 released
then the lever R is pressed to the right. The several bosses and b and bushes g
may be caused to travel away from each other at equal distances and when the
required pitch or spread is attained the several set screws S or plates 68 may be
again screwed up and the machine safely used. Referring to Fig. 8 which represents
a modification of the machine shown at Figs. 6 and 7: In place of the expanding
arrangement as shown at Figs. 6 and 7 we employ a lever R and form the end,
thereof as shown so that each said end acts as an eccentric through which the
spindles or shafts at pass and are free to revolve. It will be obvious that in this
arrangement it is only necessary to press the lever R³ one way or the other in
order to move one spindle or shaft at from the other so that the centres of the
spindles or shafts a' may be varied to suit requirements.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
1. In multiple drills or boring machines the mounting of spindles A in a
circular frame B and revolving the said spindles simultaneously and radially by
means of shafts G driven by pinions J and wheel K in combination with screw
sleeves a¹ cog nuts C and annular rack D for feeding said spindles A simultaneously
substantially as described and shown at Figs. 1 and 2 of the accompanying
drawings.
2. In multiple drills or boring machines the mounting of spindles A in a
circular frame B and revolving said spindles A simultaneously and radially by
means of the shafts G and bevel gearing Hand E driven by the bevel cranks g
plate gand crank g substantially as described and shown at Fig. 3.
3. In multiple drills or boring machines the mounting of shafts in a frame B
the said shafts at being driven simultaneously by means of bevel cranks o¹ worked
by a plate g and eccentric g in combination with the spindles A carried in
supports and 6 connected by flexible or universal connections a substantially as
described and set forth at Figs. 4 and 6 of the drawings annexed.
4. In multiple drills or boring machines the mounting of hollow spindles A in a
seginental or curved frame B and revolving the said spindles A by means of
shafts G driven either by pinions J and wheel K or by hevel cranks plate g and
crank g in combination with the nuts C working in a recess c¹ and fed by the hand
spindle H substantially as described and partly set forth at Fig. 5.

page_text: 5. In multiple drills or boring machines the means for adjusting the pitch &
spread of the spindles a' and drills M substantially as described and represented at
Figs. 6, 7 and 8.
6. Driving two or more drill spindles A by means of bevelled cranks g¹ and
one common driving plate 72 in combination with the arrangement for adjusting
the centres of said spindles A one with the other substantially as described and
set forth at Figs. 6, 7 and 8 of the drawings annexed.
This 200my of reor
H. F, BOUGHTON, M.I. Mech. E.,
London, Sheffield, and Barnsley, Agent.
H. F, BOUGHTON, M.I. Mech. E.,
London, Sheffield, and Barnsley, Agent.