Improvements in and relating to Machines for Drilling or Forming Holes in Woodwork and the like.
Year: 1894

page_text: Date of Application, 1st July, 1894
Complete Specification Left, 1st Mar., 1895-Accepted, 11th May,
1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Machines for Drilling or Forming
Holes in Woodwork and the like.
I, JOHN MACDONALD of 32 Watson Street in the City and County of Glasgow,
Engineer, do hereby declare the nature of my invention to be as follows:-
This invention has reference to and comprises a new or improved construction
of machine or arrangement and combination of mechanism for drilling or forming
holes in woodwork and the like, and specially applicable for forming the holes in
which are secured the bristles or hairs of brushes.
In carrying my invention into practice under one arrangement I mount a
transverse horizontal rotating shaft in bearings in a vertical frame, and drive same
through a pulley and belt from an adjacent parallel shaft.
On the aforementioned shaft I mount two grooved cams and a pin with anti-
friction roller on the lower forked end of a vertical rod or bar gears into the
groove of one of the cams and receives a raising and lowering motion from same.
This bar is connected through pins and slots to a parallel rod and a spiral or other
spring is interposed between them.
The upper end of this latter rod is connected through a pin or other joint to
the one end or arm of a transverse beam lever fulcrumed at its centre on the
transverse projecting arm of a bracket carried on an upper bed plate supported on
machine framework.
The other end or arm of transverse beam lever is connected through a pin and
link or like joint to the upper end of a vertical acting reciprocating spindle
guided through collars carried on the ends of projecting arms supported from
aforesaid bracket.
The other grooved cam on the transverse shaft operates through a pin and
antifriction roller the lower forked end of a vertical bar to which it gives a raising
and lowering motion, and this bar is in turn adjustably connected through pins and
slots to a parallel rod, with a spiral or other compensating spring interposed or
connected between them.
A kneed arm on this latter bar is connected to the lower end of a vertical
headstock sliding in guides on an under hung bracket carried by machine
framework.
In this headstock is carried a vertical spindle with a chuck or socket holder at
its upper end for inserting any required size of drilling tool.
This spindle has a pulley mounted round it which is driven by a belt and guide
pulley from the adjacent counter shaft, so that the spindle may receive a combined
rotating and raising and lowering motion.
A template formed with a series of parallel rows of holes has the wood work to
be perforated or drilled mounted over it and secured between guide pins and a
spring hand operated lever.
This template is placed over the upper bed plate of machine and portably
manipulated by hand for the rows to be punched under the upper vertical
reciprocating guide spindle.
The machine being set in motion the upper reciprocating spindle will come down
over the holes in template and the lower rotating drilling tool will move upwards
and drill the hole in woodwork desired to be pierced.

page_text: Should the template not be brought with one of its holes in line with the upper
spindle the latter will press on top of solid part of plate, and a projection on lower
end of slotted bar will act on the one arm of a kneed lever to press its other arm
on top of headstock of lower tool and prevent the latter from reciprocating upwards
the aforementioned springs and slotted arms allowing of this compensation.
By a modified arrangement the template is carried on an oscillating frame so
that it can be placed by hand in any desired angled position between the drill and
guide pointer so as to drill the holes through the wood at any desired angle or
throw. This would be effected by forming the oscillating frame of two side bars,
jointed to the ends of template at their lower end and at their upper end secured to
a transverse bar.
This transverse bar is secured at its centre to an upright short bar projecting
above and below it, and formed with a slot at its lower end to oscillate on a fixed
pin projecting from a plate secured to a bracket arm on machine frame. While
the top end of the upright bar has a stud and antifriction roller which travels on
concave or cam top surface of aforesaid plate, and by this means the template
is always kept at same distance from drill as well as being set at any desired
angle.
Dated the 1st day of May 1894.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Machines for Drilling or Forming
Holes in Woodwork and the like.
I, JOHN MACDONALD of 32 Watson Street in the City and County of
Glasgow, Engineer, do hereby declare the nature of my invention to be as
follows:-
This invention has reference to and comprises a new or improved construction of
machine or arrangement and combination of mechanism for drilling or forming
holes in wood work and the like and specially applicable for forming the holes in
which are secured the bristles or hairs of brushes.
In order that this invention and the manner of carrying the same into practice
may be properly understood, there are hereunto appended two sheets of explanatory
drawings, in which the same reference letters are used to indicate the same or
equivalent parts in all the figures where shewn.
Figure 1 on Sheet 1 is a front elevation of a complete machine, and Figure 2.
on Sheet 2. is a side elevation of same.
Figures 3, 4 and 5 on Sheet 1 show details of parts of the mechanism.
Figure 6 on Sheet 2. shows a view partly in section of the guiding spindle,
Figures 7 & 8 show another arrangement of template and carrier to be used for
curved work, and
Figure 9 is a plan view of the headstock carrying the drilling tool.
Referring to these drawings, in carrying this invention into practice a
transverse horizontal rotating shaft A is mounted in bearings in a vertical frame
consisting of side_standards A₁ and a table or bed plate A', which shaft A is
driven by a belt B2 passing round the large pulley A, and the small pulley B'
mounted on the shaft B carried on an extension A of the frame and which latter
shaft is driven from any first motion shaft by the belt C and the fast and loose
pulleys C, C. On the shaft A are keyed or otherwise secured two cams D, E,
and a pin with antifriction roller d' on the lower end of a duplex compensating
vertical rod or bar d d¹, shown in Figures 1 and 2, and detached in Figure 5,

page_text: engages with the groove of the cam D and receives a raising and lowering motion
from same.
This duplex bar is formed in two parts d d loosely connected by bolts and nuts
through slots d³ and a spiral or other compensating spring d causes the two parts
to work in unison so long as no obstruction prevents the movement of the upper
part d but when such obstruction occurs from the failure of the guiding spindle S
to enter a perforation in the template T when the lower part d can by the
arrangement of slots and bolts move upwards by itself.
The lower end of this bar d d is bent round and upwards and formed at its eud
as a fork which passes over the shaft A and may be retained in place by flanges on
same. The upper part d'engages by means of a pin d with one end of a horizontal
bean levers fulcrumed on the upper part of a bracket R. mounted on the table A³
of the vertical frame of machine. The rotation of the cam D thus by means of the
mechanism described causes the guiding spindle S to reciprocate vertically over the
template T.
The other end or arm of the horizontal beam levers is connected by means of
links s or such like joint to the upper end of the vertical reciprocating spindle S
carried and guided in eyes or collars R' ou the ends of arms projecting from the
Buid bracket R.
The groove of the other cam E on the shaft A by engaging with a pin and
antifriction roller e² on its lower end operates a compensating duplex rod or bar e el
formed and fitted with slots and bolts and a coinpensating spring all in an
analogous manner to the rod dd described. The upper part e' of this duplex bar
is formed as a fork, one arm of which is jointed at f to a vertical headstock F.
sliding in guides f' on an underhung bracket f2 carried on the underside of table A
of machine frame, all so that this headstock F is reciprocated vertically by the
motion of the cam E by means of the bar e e¹.
This headstock F carries by a vertical spindle a chuck or socket holder f³ for
inserting any required size of drilling tool, and this spindle is rotated at a high
speed by the belt FI passing round the small pulley and the large pulley F' on
the shaft B and passing over the large guiding pulley F.
The template T shown detached in Figures 3 and 4. Figure 3 being a side view
and Figure 4 an inverted plan view, is perforated with the required number of holes
and carries the wood t, to be operated upon by means of studs t' against which it is
firmly held by a projection on a lever the pressure being supplied by the
spring the wood being at same time held apart from the template T by the studs to.
This template T may be placed over the upper bed plate of machine, and be portably
manipulated by hand, but is preferably secured to the lower part of a rectangular
carrying frame G, so as to be capable of oscillation on the bolts G, and which
frame is suspended by an antifriction roller G resting on the curved top of a
plate G carried on the top of an arm H projecting from and above the bracket R.
The carrying frame G oscillates on the bolt G as a centre, and the roller G'
acting on the curve of the plate G causes the template T and the wood carried by
same to be presented to the drilling tool so as to ensure the drilling of the holes at
the angle desired; different curved plates being used for different styles of work.
For drilling holes in wood for the backs of curved brushes the rectangular
carrying frame G is removed and a curved template T such as illustrated by
Figures 7. and 8. Figure 7 being an end view and Figure 8 a front view, is used to
the under face of which the wood t, to be drilled is secured by the studs t¹ to and
the catches t* at each end.
This template is carried by a frame G suspended by an antifriction roller G' on
the curved top of plate G2 secured to the portable bracket H which may be bolted
or clamped to the table A' of the machine frame in front of the guiding spindle S.
This template and carrying frame oscillates on the bolt G³ in one direction and in
the bolts G in the other direction so as to present the wood to the drilling tool at
the desired angle.
The machine being set in motion and the template T manipulated to bring each

page_text: perforation in turn under the guiding spindle S as this spindle descends into each
perforation, the drilling tool ascends and instantly drills the required hole. Should
the template however not be manipulated so as to bring one of the perforations
in line with the point of the guiding spindle, this spindle is prevented from
descending, by the solid metal of the template and the compensating spring d' of
its actuating bar allows the lower part of same to rise without affecting the upper
part. At the same time a projection d on the upper part of duplex bar engages
with one end J' of a bent lever J and causes its other end J³ to press down on the
upper part of headstock F and prevent it rising with the drilling tool while the
spring allows the lower part e of the bar e e¹ to rise without affecting the upper
part, a stop K being secured to underside of table A' to sustain the side pressure
and prevent the bar bending or being displaced. In this manner all shock to the
machine is obviated. As shown in Figure 6 the point S₁ of the guiding spindle S
is made easily removeable for change.
Having thus 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 I
claim is :-
1. A machine for drilling or forming holes in woodwork and the like constructed
and operated substantially as and in the manner herein described in reference to
and shown in the accompanying drawings.
2. In a machine for drilling or forming holes in woodwork and the like, the
arrangement in combination of the various essential parts, substantially as herein
described in reference to and shown in the accompanying drawings.
3. In a machine for drilling or forming holes in woodwork and the like, the
arrangement and use of a perforated template vertically reciprocating guiding
spindle, rotating and vertically reciprocating drilling tool and stop mechanism and
cam actuating mechanism, substantially as herein described in reference to and
shown in the accompanying drawings.
4. In a machine for drilling or forming holes in woodwork and the like, the
arrangement and use of cam actuated compensating bars for vertically reciprocating
the guiding spindle and drilling tool, all substantially as herein described in
reference to and shown in the accompanying drawings.
5. In a machine for drilling or forming holes in woodwork and the like, the
arrangement and use of an oscillating frame carrying a perforated template
substantially as herein described in reference to and shown in the accompanying
drawings.
Dated the 28th February 1895.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.