Improvements in Machinery for Boring Holes in Brush Stocks and Boards.
Year: 1889

page_text: Date of Application, 23rd Nov., 1889
Complete Specification Left, 23rd Aug., 1890-Accepted, 18th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Boring Holes in Brush Stocks
and Boards.
I, ALFRED WILLIAM NASH, of 5 Bow Lane, in the City of London, Brush Maker,
do hereby declare the nature of said invention to be as follows:-
This invention has for its object improvements in machinery for boring holes in
brush stocks and boards, whereby I am enabled to simultaneously bore or drill the
entire number of parallel, or parallel and oblique, holes, with which the stock or
board is to be furnished.
For this purpose, and according to one arrangement, I provide a suitable number
of drills arranged, by preference, in rows parallel to each other, and carried by
spindles whose rear ends are fluted or grooved to form pinions. These spindles are
driven by reciprocating racks engaging with the said pinions. The racks receive
their reciprocating motion by means of pivotted levers, actuated by say a crank and
connecting-rod driven by any suitable prime motor. The pivotted levers are formed
with grooves in which travel rollers or blocks carried by the racks.
The drills are arranged in such a way that their points are all in the same plane,
while the rear ends of each row of spindles carrying the drills are progressively pro-
longed so that each of the reciprocating racks may drive its respective row of pinions
without interfering with the movements of the others. The reciprocating racks are
kept in gear with their pinions by any convenient means, as for example by plates or
blocks controlled by set screws.
When parallel holes only are to be bored the brush stock or board is secured in a
holder which is advanced either by hand or by mechanical means and maintains the
stock or board against the drills.
In another arrangement and when oblique holes as well as parallel ones have to be
bored, the machine is provided with additional drills which are arranged obliquely
around the parallel drills. The spindles carrying these additional drills are also of
varying lengths and are likewise provided with pinions and racks, as before. The
spindles are carried in bearings which slide on inclined planes. In this arrangement
the spindles carrying the drills are moved forward towards the brush stock or board
which is stationary.
COMPLETE SPECIFICATION.
Improvements in Machinery for Boring Holes in Brush Stocks
and Boards.
I, ALFRED WILLIAM NASH, of 5 Bow Lane in the City of London, Brush Maker,
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, reference being had to the accompanying drawings and to the letters and
figures marked thereon, that is to say :-
This invention has for its object improvements in machinery for boring holes in
brush stocks and boards, whereby I am enabled to simultaneously bore or drill the
entire number of parallel, or parallel and oblique, holes with which the stock or board
is to be furnished.
For this purpose, and according to one arrangement, I provide a suitable number
of drills arranged, by preference, in rows parallel to each other, and carried by

page_text: spindles whose rear ends are fluted or grooved to form pinions. These spindles are
driven by reciprocating racks engaging with the said pinions. The racks receive
their reciprocating motion by means of pivotted levers actuated by, say, a crank and
connecting rod driven by any suitable prime motor. The pivotted levers are formed
with grooves in which travel rollers or blocks carried by the racks. But I prefer
to arrange all the racks in a moveable frame which receives a reciprocating motion
from the driving shaft in any convenient manner.
The drills are arranged in such a way that their points are all in the same plane
while the rear ends of each row of drill spindles are progressively prolonged so that
each of the reciprocating racks may drive its respective row of pinions without inter-
féring with the movements of the others. The reciprocating racks are kept in gear
with their pinions by any convenient means, as, for example, by plates or blocks
controlled by set screws.
When parallel holes only are to be bored, the brush stock or board is secured in
a holder which is advanced towards the drills, either by hand or by mechanical
means, and thereby maintains the stock or board against the drill- during the drilling
operation.
In another arrangement, and when oblique holes, as well as parallel ones, have to
be bored, the machine is provided with additional drills which are arranged obliquely
around the parallel drills. The spindles carrying these additional drills are likewise
provided with pinions and racks as before. The spindles are carried in bearings
which slide on inclined guides. In this arrangement the spindles carrying the drills
are moved forward towards the brush stock or board which is helt stationary.
In order that my said invention may be fully understood and readily carried into
effect, I will proceed to describe the same with reference to the accompanying
drawings.
Fig. 1 is a plan; and Fig. 2 is a vertical transverse section, on the line A. B. of
Fig. 1, of a machine constructed according to my invention and intended for drilling
parallel boles.
a, a, are the drill spindles arranged in rows; their front ends carry the drills or
bits whose points are all in the saine vertical plane, but their rear ends are pro-
gressively prolonged, and fluted or grooved to form pinions a³, a', which engage with
the racks b, b. The drill spindles are carried in a fixed framing c which is provided
with plates e forming bearings for the rear ends of the spindles, said spindles being
held in place by pins and collars a².
The racks b are secured at their ends to a moveable frame d which receives a
reciprocating motion from the driving shaft of the machine by means of a crank and
rod connected to the frame at d'. All the spindles are thus caused to revolve first in
one direction and then in the other as the moveable frame d is driven to and fro.
ee, are guide bars secured to the fixed framing c by the screws e³; these screws
carry rollers e, e; and the moveable frame d works between the guide bars e² and
rollers e¹.
The racks are kept in gear with their pinions by means of the adjustable set screws f¹,f¹,
carried by the cross bars f,f, and they are provided at their lower ends with friction
rollers ff, which bear upon the upper surface of the racks. By turning these set
screws, more or less pressure may be put upon the racks, as required.
The brush stock or board to be acted upon is carried in a moveable holder g
which can be caused to slide to and fro along the guides g', g¹, by means of the
hand lever . This lever is pivotted at ¹ to the base C of the machine and is arc
shaped at its upper end where it is provided with a slot h' in which works a pin or
bolt 3 carried by the holder g. By raising or lowering the handle of this lever the
pin or bolt is caused to travel in the slot h² and the holder is thereby advanced to
or receded from the drills. The brush stock or board is retained in place within
the holder by the studs gx, gx, and guides g², g².
Fig. 3 shows a modified arrangement for simultaneously drilling both parallel and
oblique holes. In this arrangement the spindles a, a, are disposed parallelly as
before it instead of being carried in a fixed frame, as in the construction shown by

page_text: Figs. 1 and 2, they are carried in a moveable frame B, so as to permit of their being
fed forward towards the brush stock or board D, which is held stationary. c, c, are
other drill spindles arranged obliquely around the parallel ones and carried in move-
able frames or bearings c', c', which can be fed forward along fixed guides c², c²,
towards the brush stock. The feeding forward of the frames carrying the spindles
may be effected by means of rods connecting the rear ends of each of the moveable
frames with a vertical lever which may be actuated by hand or by any suitable
mechanical contrivance.
Although in Fig. 3 I have shown only one row of oblique spindles arranged around
the parallel ones, I may, if preferred, employ several rows of spindles and arrange
them with their rear ends progressively prolonged in a similar manner to the parallel
ones.
Having now particularly described and ascertained the nature of my invention and
in what manner the same is to be performed, I claim :-
1. In a machine for simultaneously boring parallel holes in brush stocks and boards,
and in which the stock or board is advanced to the drills, the use of progressively
prolonged drill spindles having their rear ends fluted to form pinions and arranged
in rows step-wise, said spindles being adapted to engage with racks likewise arranged
step-wise and carried in a reciprocating frame together with adjustable pressure
rollers for keeping said racks to their work, substantially as described and shewn
with reference to Figs. 1 and 2 of the annexed drawings.
2. The modified arrangement of machine for boring parallel and oblique holes in
brush blocks and boards, wherein certain of the progressively prolonged and fluted
drills are arranged obliquely around the parallel drills and the said spindles are
carried in bearings adapted to slide on inclined planes, and advanced towards the
brush block or board, substantially as described and shewn with reference to Fig. 3
of the annexed drawings.
DL:
ERNEST DE PASS,
78, Fleet Street, London, Agent for the Applicant.