A Multiple Brush-boring Machine.
Year: 1893

page_text: Date of Application, 20th Oct.. 1893
Complete Specification Left, 29th Dec., 1893-Accepted, 3rd Feb., 1894
PROVISIONAL SPECIFICATION.
A Multiple Brush-boring Machine.
GEORGE ANDERSON, Machine Brush Maker, Catlin Street, Boxmoor and
FREDERICK MARGRAVE Engineer, Catlin Street, Boxmoor do hereby declare the
nature of this invention to be as follows:-
Constructed upon a suitable frame the machine consists of one shaft with pulley
fixed in centre of two bearings that carry the said shaft; on one end of the latter a
crank pin revolves the driving plate with all the multiple drills or bits, the whole
action being satisfactorily regulated and adjusted by two upright rods or spindles
on either side of the plate & by a journal bearing in centre of the driving plate for
receiving the said crank pin; the said rods being firmly bolted to the frame and to
allow of two slippers sliding up and down. To each end of the driving plate which
is of an oblong shape are fixed two pins and for receiving these, two corresponding
holes are made in the two slippers; thus keeping the driving plate in a horizontal
position. The bits have on the one end a crauk equal to the crank on the machine
shaft. These bits are placed into the pattern form & plate specially prepared
& bored in the shape of the brush intended to be produced, the said plate being in
turn fixed in the driving plate of the machine by means of 4 bolts, one at each
corner; the said pattern form being on the other hand bolted solidly down on the
frame of the machine. A suitable capstan block is attached for firmly securing
the wood which is being drilled & this is worked by a lever with the foot.
Dated this Twentieth day of October 1893.
GEORGE ANDERSON.
FREDERICK MARGRAVE.
COMPLETE SPECIFICATION.
A Multiple Brush-boring Machine.
We GEORGE ANDERSON, Machine Brush Maker, and FREDERICK MARGRAVE,
Engineer, both of Catlin Street Boxmoor Herts 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 :—
Constructed upon a suitable frame the machine consists of one shaft with pulley
fixed in centre of two bearings that carry the said shaft, on one end of the latter a
crank pin revolves the driving plate with all the multiple drills or bits, the whole
action being satisfactorily regulated and adjusted by two upright rods or spindles
on either side of the plate and by a journal bearing in the centre of the driving
plate for receiving the said crank pin, the said rods being firmly bolted to the
frame and to allow of two slippers sliding up and down. To each end of the
driving plate which is of an oblong shape are fixed two pins and for receiving
these, two corresponding holes are made in the two slippers, thus keeping the
driving plate in a horizontal position. The bits have on the one end a crank equal
to the crank on the machine shaft. These bits are placed into the pattern form
and plate specially prepared and bored in the shape of the brush intended to be
produced the said plate being in turn fixed in the driving plate of the machine by
means of bolts one at each coruer, the said pattern form being on the other hand
bolted solidly down on the frame of the machine. A suitable capstan block is
attached for firmly securing the wood which is being drilled and this is worked by
a lever with the foot.

page_text: Keterring to the annexed drawings
Figure 1 is a plan view of
my invention.
Figure 2 sectional elevation through line x-y.
Figure 3 front elevation of jaws & chuck.
Figure 4 rear elevation of same.
Figure 5 side elevation of chuck & capstan head.
Figure 6 side elevation of guides and slippers.
Referring to Figures 1 & 2 a is a plate which has rods b which slide in bearings
in the slippers c. These slippers slide upon pillars or rods d and have controlling
springs e encircling said rods d and bearing upon the slippers c. This plate is given
a circular motion by means of a crank pin which engages in the bearing g and is
driven by the pulley wheel carried in the bearings i. is a rectangular frame in
which the pattern form carrying the drills is fixed by means of bolts k the ends / of
these drills are cranked to the same degree as the pin f which drives the plate a
and engage in a block of wood or the like m which is secured to the plate a by any
convenient means such as bolts in the screw holes n (Fig. 2). By this arrangement
it will be seen that by rotating the pulley the drills o will be caused to rotate.
The back of the brush to be bored is held in the jaws p working in the face
plate q which is swung upon the capstan head r so that the same may be set at an
angle if desired. The face plate and jaws or chuck g is feed up to the drills by
means of the toggle joints (Figure 5) the levert being operated by the foot through
any well known means of connection.
The jaws p of the chuck are operated by a plate n having inclined grooves v
(Fig. 4) in same which engaged on pius attached to the jaws p; this plate is so
connected if desired by any well known means to the foot pedal operating the
toggle joints, so that when the chuck is removed from the drills the jaws are
opened but as the chuck approaches the drills the jaws p will close upon and hold
the work through the medium of the plate aforesaid, which slides in grooves on
the face plate q. The stroke or play of the toggle joint s may be adjusted by the
screw pin entering or being screwed out of the lever y or such convenient
arrangement.
Having now particularly described and ascertained the nature of our said inven-
tion & in what manner the same is to be performed we declare that what we
claim is:
1. The combined construction and arrangement of the various parts substantially
as herein described and illustrated,
2. In multiple brush boring machines a metal plate having bearings at its four
corners said bearings sliding in slippers which move up and down upon rods or
guides and are controlled by spiral springs, said plate operating the cranks of the
drills through the medium of a perforated plate of wood or such suitable material
in which the cranks of the drills engage & which is secured to the metal plate
aforesaid said metal plate having a circular or rotating motion communicated to
same by means of a suitable driven crank pin substantially as described and
illustrated.
3. In brush boring machines of the class herein described, a movable chuck for
holding the work to the bored and having jaws operated by a slotted plate said
chuck being operated by a toggle joint and being carried upon a capstan head or
swivel in order that it may be set at a desired angle substantially as herein
described and illustrated.
Dated this 28th day of December 1893.
E. EATON,
Agent for Applicants.