Improvements in Machinery for Multiple Boring in Brush Stocks and other Articles.
Year: 1893

page_text: Date of Application, 13th Feb., 1893
Complete Specification Left, 13th Nov., 1893-Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Multiple Boring in Brush Stocks
and other Articles.
I, ALFRED FOSTER, of Boxmoor Saw Mills, Hemel Hempstead, in the County
of Hertford, Timber Merchant, do hereby declare the nature of this invention to
be as follows:-
This invention relates to improvements in machinery by which a number of
holes may be simultaneously bored in brush stocks or other articles.
According to my invention in boring holes in a brush stock, for instance, I
arrange either vertically or obliquely as required, the necessary number of drills,
in a perforated form or bearing plate which gives to each its correct position and
which is fixed immediately over the article to be bored. To each drill is attached
the lower end of a bar or rod forming a drill stem, the upper end of which
carries a wheel or pulley connected to the drill stem by a feather. This wheel is
caused to revolve and consequently to rotate the drill stem to which it is attached,
by being in frictional contact with a conical driving wheel which is supported upon
a shaft and is caused to revolve by any convenient means for conveying power
thereto; the whole being carried by a suitable framing.
Each wheel or pulley may be covered with india-rubber or other suitable
material (preferably in the form of a ring of round section) to secure effective
frictional driving power. In order to keep the friction wheels up to their work I
arrange bars transversely on the framing of the machine and surrounding the
conical drum and to these bars I attach rods in any required position or angle
the said rods being slotted longitudinally and carrying at their ends bearings to
fit the drill steins the said bearings being mounted on universal joints. These
bearings being placed ou the drill stems immediately beneath the friction wheels
will hold the latter firmly in place and prevent them from falling or slipping
downwards on the drill stems. Similar bearings may be placed in a lower position
on the respective drill stems if required to steady the latter.
The drill stems and consequently the drills to which they are attached may be
caused to advance to or recede from their work, each in the true line or angle of
the hole in the article to be bored by any suitable means. Preferably I affix on
each drill stem a collar with a flange at each of its ends and into the groove thus
formed I insert as a lever the end of a rod suitably shaped, the other end of such
rod being fixed upon a bar forming an axis and held as nearly as possible at right
angles with the drill stems, and which bar upon being partially rotated in either
direction will actuate the levers by elevating or depressing them.
It will be seen that according as I place my drill stems more or less obliquely
and as I bring my friction wheels into contact with the conical driving wheel
either nearer to or more distant from the point of the same, I may vary the angles
of the holes to be bored; and may also arrange the friction wheels and drill
stems in such a position that vertical and parallel holes may be bored.
In order to equalize the speed of the revolution of the drill stems I may use
friction wheels varying in diameter according to the position in which they come
into contact with the couical driving wheel.
It is to be understood that my apparatus may be arranged in either a vertical,
horizontal or oblique position.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Multiple Boring in Brush Stocks
and other Articles.
I, ALFRED FOSTER, of Boxmoor Saw Mills, Hemel Hempstead, in the County
of Hertford, Timber Merchant, 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 relates to improvements in machinery by which a number of holes
may be simultaneously bored in brush-stocks or blocks or other articles and
particularly the oblique holes arranged in a curved form for what are known as the
wings of brushes.
In the accompanying drawings,-
Figure 1 is a plan of a horizontal multiple boring machine constructed according
to my invention for boring the oblique holes for the wings of brushes:
Figure 2 is a front elevation partly in section on the line 2-2 Figure 1; and,
Figure 3 is a side sectional elevation of the same:
Figures 4, 5, 6 and 7 are details drawn to an enlarged scale and hereinafter
described.
a is the frame of the machine having a front extension a and b, b the drills or
bits for boring the work, which drills are supported at their points in a suitable form
or bearing plate c. d is the work-holder which may be of any suitable construction,
arranged in front of and carrying the form plate c but adapted to be clamped in any
required position on the part a of the frame a. e indicates a brush-block held
therein to be bored.
In carrying out my invention I arrange the necessary number of drills b, b in the
perforated form or bearing-plate, the holes in which are bored so as to give to each
drill the correct oblique position and arranged in a semi-circle or similar curved
form. Each drill is attached by a clamping screw 61 to a hollow bar or rod f
forming a drill-stem, one end of which carries a wheel or roller g connected to the
drill-stem by a feather key g' as shewn clearly in Figure 4 which is a sectional
elevation of the said wheel, drill-stem and drill and parts connected therewith.
The wheel is caused to revolve and consequently to rotate the drill-stem to which
it is attached by frictional contact with a conical driving-wheel or drum / which is
supported upon a shaft h' and is caused to revolve by either of the pulleys i, i' or
by any other convenient means.
Each wheel or pulley g is advantageously provided with a covering g² of india-
rubber or other suitable material (preferably in the form of a ring of round section)
so as to ensure effective frictional grip on the driving drum h.
In order to support
and keep the friction wheels g, g in position on the drum I arrange a series of
bars, supported on the frame a of the machine by curved frames j, j², the said
bars partly surrounding the conical drum as shewn, the frames j, j being bent to a
semi-circle. To these bars j, j I attach rods k, k by means of universal joints 1, 1 in.
any required position or angle, the said rods carrying at one end bearings k¹, k¹ to fit
the drill-stems, as shewn clearly in Figure 4.
Each universal joint, as shewn in Figure 5 which represents a detached view of
the same, comprises a socket l' embracing and adapted to be turned or moved
along to any required position on one of the bars j, and another socket 12 formed
integral with the socket but at a right angle thereto, the said socket l' embracing
a pin connected to one of the rods k, whereby the latter can be turned to any
required angle relatively with the said double sockets, and consequently with
the bars j. The sockets 1, 2 are advantageously split so that they can be clamped
in position by means of bolts and nuts . The pin 13 is advantageously connected
to the rod k by a split socket adapted to be clamped thereon by a bolt and, nut l

page_text: whereby the said rod can be adjusted relatively with the said pin and consequently
with the universal joint and supporting bar j.
Similar bearings to the bearings
may be placed in a lower position on the
respective drill-stems if required to steady the latter.
The drill-stems and consequently the drills 6 to which they are attached are
caused to advance to or recede from the work, each in the true line or angle of the
hole in the article to be bored by any suitable means. Preferably I form on each
drill-stem a groove m into which I insert the forked end of a lever n fulcrummed
upon the rod k at n' so as to be as nearly as possible at right angles with the drill-
stems, the said lever n being operated in one direction to put the drills into work
by means of a cord o passing over a pulley on the frame j' and connected to a
counterweighted forked lever 7 depressed by the foot of the operator.
When the
foot of the operator is removed from the lever the drills are caused to recede from
the work by springs ", " connecting the rods k, k and levers n, n. Instead of the
springs, I may in some cases cause the drills to recede from the work by means
of cords connected to the levers n, n passing over pulleys on the frame j² and
operated by depressing another foot-lever. The pulleys p, p, one of which
is shewn detached in Figures 6 and 7 which are elevations at right angles,
are advantageously connected to the frame j¹ by universal joints s, s, each of which
consists of a sockets embracing the frame and adapted to be turned or moved
along to any required position between the bars j, j and another socket s embracing
a pin s on the socket s¹ so that it can be turned relatively with the latter the
socket 2 carrying a pin s upon which the pulley p is mounted. The said sockets
are advantageously split and provided with bolts and nuts so, s so that they can be
clamped in position.
By the arrangement of bars j, j forming a semi-conical frame it will be seen that
by varying the position of my drill-stems along the said bars and also the position
of the form-plate on the frame a¹, the obliquity or angle of the drills can be
altered and consequently of the holes to be bored, the friction wheels 9 being
brought into contact with the conical driving drum h either nearer to or more
distant from the smaller end of the same; the cords o are also disconnected from
the lever q and lengthened or shortened as required and reconnected to the said
lever. As the variations in position of the said wheels upon the said drum
surface would cause them to revolve at different speeds I equalize to a certain
extent the speed thereof by employing driving pulleys of different diameters
as shewn or I may use friction wheels of different diameters.
The operation of the machine is as follows:-
The required number of drills are arranged in connection with the bars j, j at the
required angle by clamping thereto their drill-stems by means of the sockets l' of
the universal joints and by arranging their points in the form or bearing-plate
corresponding to and in front of the block e to be bored as shewn in Figure 3. The
shaft is then set in motion by either of the pulleys i, according to the speed
required for the drills. By now depressing the foot-lever q the cords o will be
caused to operate the levers n, n and move the drills b, b forward into the work.
By releasing the foot-lever y the drills will be withdrawn from the block e by the
springs r, and the brush-block e can then be removed from the work-holder å and
another block substituted, the machine being operated again in the manner described
and so on.
Although I have described the machine as arranged with a drum having a
horizontal axis it will be obvious that it can be arranged vertically if required.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
claim is :-
1. In a multiple boring machine for boring brush-stocks or other articles, the
combination of a conical drum and friction wheels for rotating the drills, a series of
bars for supporting the rear ends of the drills in any required position and a

page_text: movable form or bearing-plate for supporting the points of the drills, substantially
as described.
2. In a machine of the kind herein described, the combination with the series of
bars such as jj of rods having bearings for supporting the ends of the drills and
levers for moving the drills into and out of work, the said levers being operated in
one direction by a foot-lever and in the other direction by springs (or by a foot-
lever) substantially as described.
3. The improved multiple boring machine for boring brush-stocks and other
articles constructed and operating substantially as hereinbefore described and.
illustrated in the accompanying drawings.
Dated the 13th day of November 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.