Improved Means for Use in Drilling and Tapping Standards and Fittings for Windows and Show Cases.
Year: 1893

page_text: Date of Application, 5th June, 1893
Complete Specification Left, 5th Mar., 1894-Accepted, 5th June, 1894
PROVISIONAL SPECIFICATION.
Improved Means for Use in Drilling and Tapping Standards and
Fittings for Windows and Show Cases.
FREDERICK FRANCIS SMART of 42 Slaney Street Birmingham Shop Fitter do
hereby declare the nature of this invention to be as follows:-
My invention consists of a machine designed to drill and tap holes which have to
be formed along the whole length of the said standards or tap bar at equal distance
apart and its object is to drill and tap these holes in a more exact and speedy
manner than by the usual method of setting out and centre punching before
drilling.
In constructing a machine according to my invention I use for preference a
vertical drilling machine with lever feed motion. On the table of such machine I
fix an adjustable guide and also a spring. In this said guide I work a division strip
of metal or other suitable material which has notches along its whole length formed
at equal distances apart, the said spring fitting in these notches as the division strip
is moved through the guides. On this division strip I fix the standards or tap bar
that I wish to drill and tap. As the division strip together with the standards or
tap bar is worked through the guide of the drilling machine it is arrested and held
in position by the said spring while the hole is drilled or tapped or both so that the
boles are certain to be equal distance with the division strip. I also form the drill
used with the drilling machine with its top end formed as a tap so that the tapping
and drilling may be accomplished at one operation.
Dated this 1st day of June 1893.
FREDERICK FRANCIS SMART.
COMPLETE SPECIFICATION.
Improved Means for Use in Drilling and Tapping Standards and
Fittings for Windows and Show Cases.
I FREDERICK FRANCIS SMART of 42 Slaney Street Birmingham Shop Fitter
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:-
My invention relates to an improved machine or means for drilling equidistant
holes in the standards and fittings of windows and show cases.
It is essential that the holes in these said fittings and standards should be at
exactly equal distances apart, and the object of my invention is to ensure the equal
and exact spacing of such holes, and also to economise the cost of this drilling
operation.
Heretofore it has been necessary to determine the points at which holes are to be
drilled by marking them off from a gauge or standard, and centre-punching the
same prior to drilling. By my invention this laborious and costly process is entirely
dispensed with, and a bar to be drilled is intermittently traversed, and arrested at
the proper points and subjected to the drilling tool.
Figure 1 of the accompanying drawing represents in front elevation, a machine
for drilling standards and tapped bars, fitted or provided with work-carrying,
traversing and arresting means constructed and arranged according to one form of
my invention.

page_text: Figure 2 represents a topside plan of the said machine; whilst
Figure 3 represents a transverse vertical section of the same, upon the dotted
lines A B Figure 1.
The same letters of reference indicate corresponding parts in the several figures
of the drawing.
I prefer to use, in connection with a machine constructed according to my
invention, a vertical drilling machine, fitted with spindles for carrying one, two or
a indicates the spindle
more drills, and provided with lever feed or other motion.
and a' the drill of such a machine.
b is the general framing of such an appliance, which is made of any suitable
length, and is mounted at its ends upon legs or standards, whilst is the bed,
having an open ended guide slot 6, running longitudinally throughout its full
length. Fitted and sliding within this slot 3, is a rack c, having teeth upon its
underside, which rack is traversed by means of a pinion cl, mounted upon a shaft c³,
running within bearings c³, and turned by a hand-wheel c
Bolted or otherwise fixedly secured to the topside of this said rack c, is a work-
carrying and dividing bar d, (which constitutes the primary feature of my invention)
having upon its front edge d', a series of angular stop teeth ds, with each of which,
the nose e', of a spring bolt or catch e, carried by an extension 4, of the bed 2, is
adapted to successively engage, on the said work-carrying dividing bar being
traversed by the rack and pinion aforesaid.
The dividing bar is pierced with a series of holes d³, forming clearances for the
point of the drill on the same piercing the work, whilst its back edge has a
groove d', and its frout edge an undercut recess or rabate d³, formed below the
teeth, which groove and rabate are adapted for the reception of the respective
ends, f, of the cramps f, by which the work g, is secured to the carrying,
bar d.
Now assuming that it is required to drill a standard or bar with a series of holes
exactly one inch apart, then a work-carrying and dividing bar is taken, having the
stop teeth, upon its front edge d', situated at one inch from one another, that is
to say, the distance between the shoulders or straight parts d', of the teeth is equal
to the space which it is desired to have between the holes in the work.
Such a bar as above described is affixed to the top and plain face of the rack
by any suitable means, and then the length of metal to be drilled is clamped
centrally along the upper face of the said carrying bar, either by cramps f, f', f³,
as represented, or by any other securing device, and this done, the work is ready
for drilling.
Assuming then, that the work is clamped in its proper position, then the hand-
wheel c, is turned in the direction of the arrow, from right to left which, through
the medium of the pinion c¹, traverses the rack c, together with the bar d, and
work 9, carried by it, until that part of the work which is to receive the first hole
is brought under the drill, in which position it is held by the nose e¹, of the spring
bolt or catch e, snapping behind the shoulder de, of one of the stop teeth d³, on the
front edge of the carrying bar d. The drill then descends, forms the hole, and
ascends again, clear of the work, which is now traversed forward, to the extent of
one tooth of the carrying bar, by giving the hand wheel a slight rotation, causing
the rack, the carrying bar and the work to move forward to the required extent,
and as the same are traversed collectively along, the nose of the bolt wipes over the
inclined face d', of the next stop tooth d, and then snaps behind its shoulder d
thus again holding the work during the drilling of the next hole, and so on the
carrying bar and work are together alternately traversed by the rack and pinion,
and arrested and held for drilling by the spring catch, until the length of metal
under operation has been provided with the requisite number of holes.
If preferred, the rack, pinion and hand wheel may be dispensed with, and the
work-carrying bar, which may run between suitable guides bolted to the bed-plate,
may be simply traversed or pushed along by hand.
It is obvious that any number of drills may be arranged to act simultaneously

page_text: upon the work, and that the carrying and dividing bar may be traversed to the
extent of any number of its teeth by turning the hand wheel to a greater or less
extent.
If it is required to drill holes at irregular or unequal distances apart, then the
notches on the edge of the bar are arranged in positions corresponding to the points
where the holes are to come.
In conclusion, I wish it to be clearly understood that I do not limit myself to the
precise means herein described for traversing the carrying bar and holding the same
in position during the drilling of the holes, nor to the means set forth for securing
the work to the carrying bar, as any well-known mechanism or means may be
employed for these purposes; but
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 I
claim is :-
:-
First. A hole-spacing means for use in machines for drilling holes in the
standards and tapped bars of window fittings and show cases, consisting of a work-
carrying dividing bar, having formed upon or cut within the front edge or other
part of it, a series of equi-distant notches, stop teeth or equivalents, with which the
nose or equivalent part of a spring bolt or catch engages, substantially as and for
the purpose as described and set forth.
Secondly. In means or machinery for drilling equi-distant or other holes in
standards and tapped bars, the combination with a drill a', of a work-carrying
dividing bar d, having teeth d², upon its front edge, which bar is intermittently
traversed by a rack and pinion c, c', or similar arrangement, and arrested and held
by a spring bolt e, e¹, substantially as and for the purpose as described and set
forth.
Thirdly. In means or machinery for drilling equi-distant or other holes in
standards and tapped bars, the general construction, arrangement and combination
of the several parts of the same, substantially as and for the purpose as described
and set forth in the several figures of the drawing.
Dated this 1st day of June 1894.
FREDERICK FRANCIS SMART.