Improvements in and relating to Drilling Apparatus.
Year: 1898

page_text: Date of Application, 22nd July, 1898-Accepted, 12th Nov., 1898
COMPLETE SPECIFICATION.
Improvements in and relating to Drilling Apparatus.
I, EMIL CAPITAINE, of 5, Gutzkowstrasse, Sachsenhausen, Frankfort on the Main,
in the Empire of Germany, Civil Engineer, 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:-
The apparatus which forms the subject of the present invention is intended to
render possible the drilling of holes arranged as may be desired in relation to one
another, in heavy parts of machinery, with the employment of so-called templates.
Hitherto, smaller parts have been drilled as follows:-The template or drilling
plate was fixed to the part to be drilled, or the latter was put in a so-called drilling
box or chamber, and the whole placed under a drilling machine, in which case
care had to be taken that the part to be drilled, together with the drilling plate was
brought exactly into that position which was intended for the drill and determined
by the direction of the hole in the ordinary brittle guide-box. A jambing or press-
ing of the drill to the side of the bush is, in the case of such small and, therefore,
in relation to the diameter of the drill, comparatively light parts, of no great
disadvantage. If, however, the weight of the object to be drilled and of the
templates or drilling plates belonging thereto, be very great in proportion to
the diameter of the drill, it is necessary to introduce the drill quite centrally in the
hole of the boring-bush or guide-box, and either to bring the drill of a radial
drilling machine above the box, or the box that is to say the object to be drilled.
with the drill plate, exactly under the drill, as otherwise the drill will be too much
jambed or pressed in the box.
The essential feature of the new apparatus, which permits or ensures the drill-
ing of larger or smaller holes as desired, arranged in any manner that may be
preferred, in relation to one another, in parts of machinery of any weight with
the employment of drilling plates, consists in the fact that so-called portable
(drill-presses) drilling apparatus are placed and secured, by means of a special
guiding arrangement in a position which agrees or conforms exactly and con-
stantly with the template or guiding box, and the fixing of such apparatus is
effected in such a manner that the drilling of a number of holes arranged closely
adjoining one another is rendered practicable.
The accompanying drawings illustrate various applications of the apparatus.
In Figure 1, A is the object to be drilled; it is fixed inside the drilling-box or
chamber B. This box B contains the guiding bushes 6 for the drills, in those
positions at which holes are to be drilled in the machine parts. Obviously such
guiding bushes are fixed in the nearest possible proximity to the object to be
drilled. The "
portable drilling apparatus C are so constructed that without

page_text: any trouble they take exactly that position above the templates, which is pre-
scribed (or determined) by the hole of the particular drilling bush, so that there
cannot be the least jambing or pressure of the accurately central running drill
in the drilling or guiding bush.
The drilling apparatus C consists of the casing s enclosing the driving gear-
wheels, the spindle i, which can be screwed higher or lower by means of the hand-
wheel h, as well as of the fastening or clamping apparatus v, w, y, z. On the drill-
ing box or chamber, moreover, above each hole, exactly at right angles to the
direction of the hole to be drilled, a surface is planed or prepared, on which the
drilling apparatus with the flange (the actual basis of the same)
is placed. The flange has on its under side, a central boss or pro-
jection z, which fits into the opening of a steel plate p fixed on to the drilling box
or chamber, and centrally with the hole of the guiding bush b. The whole drill-
ing apparatus, is now fixed to the drilling box or chamber and the flange with
its boss secured within the steel plate pin such prescribed position by means of
a bow or bent lever y, which engages at one end, under the projection or fulcrum v
on the drilling box and at the other end is held down by means of a locking
screw w arranged within a link pivoted on the drilling box in such a manner as
to be capable of being moved from its position for the purpose of releasing the
lever y when the operation of drilling has been effected.
As can be seen, this apparatus renders possible the drilling of holes in any
position; holes 1, 23 lying quite close to one another can be drilled, it being
only necessary to loosen the tightening screw w in the pivoted lever y', to permit
of the small boss or projectionz on the flange of the drilling apparatus being
removed from out of the hole in the plate p; and the drilling apparatus can then
be removed to the adjoining hole 2 or 3. As will also be seen the projection or.
fulcrum-piece in this case is in the form of the segment of a circle, the locking-
screw and pivoted link y' being arranged in the centre of the circle. If several
holes are to be drilled close together on a level plane, the fastening of the drill-
ing apparatus may be arranged as indicated in Figure 4. The fulcrum-piece v
for the bow or bent lever y may take the form of a straight bar, as also the fasten-
ing rails or link w¹. The binding or locking screw w for holding down the lever y
is here shown arranged within the outer end of the bow y. The latter, as will
be seen is formed with a long slot in which the drilling apparatus is free to move
backwards and forwards, from one end to the other of the drilling box surface,
that is to say, can be removed to and fixed at any desired point. The extended
fulcrum vand link w permit the drilling apparatus together with its locking
device to be moved to either side, right or left.
If larger holes are to be drilled, it is preferable first to drill a small hole 10, sec
Figure 1, and then to enlarge this by means of a pin-drill d see Figure 2, the
pin d' of which is guided in the smaller hole 10. In this case, the guiding bush
is made removable, being secured to a plate f, Figure 1. This latter is guided in
the hole of the plate p and at the same time determines the exact position of the
drilling apparatus. The small hole having been drilled (Fig. 1), the plate or body f
together with the guiding bush is taken out and a plate fl (Fig. 2) substituted
to permit the passage of the larger drill d. If an oblique hole, see Figure 3, is
to be drilled adjoining the direct hole it is necessary to replace the central guiding
plates f f by a guiding body f³.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
-
An apparatus for boring holes of any desired size and in any desired position,
consisting of drilling plates or drilling boxes on or in which the parts of machines
to be drilled are fixed, and of so-called portable drilling apparatus, the latter being
fixed to the drilling plates or drilling boxes absolutely central with the hole of the
guiding bushes for the drills, and this being effected with the aid of the plates p

page_text: and rz, as well as of the bow y, fulcrum-piece and binding screws w, with the
assistance in certain instances, of specially interchangeable guiding plates or
bodies f, f' f³.
GEDGE & FEENY,
Chartered Patent Agents, 60, Queen Victoria Street, London, E.C.