AN IMPROVED ROCK-DRILLING MACHINE, TO BE WORKED BY HAND
Year: 1878

page_text: LETTERS PATENT to Carl Pieper, of Dresden, Saxony, Civil Engineer, for the
Invention of "AN IMPROVED ROCK-DRILLING MACHINE, TO BE WORKED BY
HAND." A communication from Jacob Faber, of Barmen, Prussia, Engineer.
COMPLETE SPECIFICATION filed by the said Carl Pieper at the Office of the
Commissioners of Patents on the 5th July 1878.
CARI. PIEPER, of Dresden, Saxony, Civil Engineer.
DRILLING MACHINE, TO BE WORKED BY HAND."
Faber, of Barmen, Prussia, Engineer.
" AN IMPROVED ROCK-
A communication from Jacob
This Invention relates to a drilling machine for hard rocks, which is to be worked
by hand. The same can be used standing free in quarries, railway cuttings, shafts
of mines, &c., as well as fixed between walls in tunnels, galleries, &c., and it may be
placed in a horizontal or a vertical position, or at any desirable angle; more-
over, it is simple and portable, and may therefore be considered a machine for
universal use.
The annexed two Sheets of Drawings represent the machine in two different
arrangements. The Figures 1-4 show the same adapted for horizontal drilling;
the Figures 8 and 9, for working vertically. By suitably altering the combination
of frame parts, shown by Figs. 8 and 9, and adding a rod or pillar k¹ and either of
the parts, Fig. 7 or 7, the arrangement of Figs. 1-4 is produced.
Fig. 5 gives a view of an intermediate piece, by means of which the combination
of Figs. 1-4 may be adapted to drilling at any angle.
Fig. 6 is a prop for staying the top of the frame.
Figs. 10 and 11 represent the main part of the machine to a larger scale, and
Fig. 12 exhibits an arrangement for easily and quickly connecting and disconnecting
the fly wheel and its axle.

page_text: The drill a is held in the socket b by pressing down the die e by means of a
covering plate and screws d; in a similar manner the socket b is connected with the
driving spindle w. The fly wheel c is mounted on a axle, which carries at its other
end a disk provided on its face with one, two, or more cams i, k; g is a friction
pall for preventing the fly wheel to be turned the wrong way. When the disk h
revolves in the direction of the arrow f its cams i, k, act on a collar of the driving
spindle w, thereby lifting the latter and expanding the spring o, which causes the
drill to strike as soon as the collar is released. The said collar revolves on a
bush n, Fig. 10, to which the spring o is attached; at its other end this spring is
connected to the ratchet wheel by means of a split chuck p and a band q, which
firmly clamps the parts of the chuck to the spring, whilst the boss of the ratchet
wheel is allowed to revolve in the chuck; is a nut consisting of two parts, which
slide on tongues or in grooves of the collar, and which are besides kept in their
place by the screws u. The parts of the nut may be pressed, more or less, against
the thread w cut on the driving spindle to by means of a clamp v. When this
clamp is in its place and the collar is lifted the nut t will lift the rod w with it,
but if the clamp is released and drawn off from the nut halves they may be shifted
apart on the collar so that the drill can be pushed freely through the nut, which
becomes necessary when a new drill is to be. placed in. the machine in order to
avoid the slow process of turning the spindle back in the nut.
For causing the drill to revolve slightly after every stroke the end of the
spindle w passing through the ratchet wheel ", and which is square in section, is
twisted, as inay be seen from the different Figures; the other end of the spindle is
also square in section, but straight, and it passes through the boss of the ratchet
wheel 2. The two rateliet wheels r and revolve in the bearings s and y respectively,
and they are provided with spring palls, which allow them to turn in one direction
only. The consequence of this arrangement is that when the spindle w is lifted
(i. e., moved in the direction of arrow m) it will revolvo within the ratchet wheel 1,
which is prevented from turning in the opposite direction; the other end of the
spindle will, however, at the same time cause the ratchet wheel z to revolve with
it. When the spindle is propelled the other way by spring o the wheel z will
remain stationary; the spindle consequently, in this part of stroke, does not
revolve, but it turns wheel by means of its twisted end. The edges of the drill
are thus always made to strike on other points of the hole in the rock..
The advance or feed of the driving spindle is effected by the very operation of
its being raised, inasmuch as by the resistance of the spring o so much friction is
produced between the cam i ork and the collar 7 that the latter, together with the
nut on it, turns on the screwed part w₁ of the spindle, especially when the collar
is near the end of its outward stroke. By this arrangement the friction between
the cams and the collar is at the same time reduced. The screw thread on the
spindle has, of course, to be cut in such a manner that by the turning of collar
with nut tan advance of the drill is effected. It is apparent that by suitably
adjusting the pressure of the clamp v on the nut parts this forward movement can
easily be entirely prevented or regulated, according to desire.
The frame of the machine is so arranged that drilling can be done in any corner
close to the side walls of the rock. In vertical drilling it consists of a pillar b',
Figs. 8 and 9, by preference tubular, to which a transverse bar c² can be clamped
by the split T piece c'. The said bar c, which also may be hollow for sake of
lightness, is provided with a fixed leg d' and an adjustable leg e¹. The upper end
of the pillar b' is furnished with a revolving cap to which the clamp f¹ is jointed.
This clamp serves to hold the strut g', which by the described arrangement is made
movable in all directions, and adjustable with regard to length.
For horizontal drilling the strut g¹ is removed from the clamp f¹ and the cross
bare detached from the pillar b', whereupon the point h¹, Fig: 7, is fastened to b¹,
as shown by Figs. 1 and 4. - The clamp i¹ serves at the same time for attaching the

page_text: point to the pillar, and for allowing its length to be regulated. When the
pillar bis hollow the arrangement, Fig. 7a, may be used. The pillar (which
may also be hollow) is now pushed through the opening in the upper clamp of the
coupling piece on pillar b¹ (Figs. 3 and 4). m³, Fig. 3, is an adjusting ring by
which, in combination with the said clamp, the pillar b with the drilling apparatus
may be adjusted at the desired height on pillar 'k', the cross bar cl, with legs d
and e', being thereupon fixed to the pillar k, and the strut g' in the jointed
clumpf, the machine is ready for horizontal drilling, as shown by Figs. 1, 3, and 4.
It is apparent, however, that if the strut g¹ is removed and the machine inclined
until point h¹ touches the ground, so that it stands on this point and the legs d'
and e¹, holes may be drilled at an angle of 45 degrees, or somewhat more or less,
with this same arrangement of frame.
An entirely universal frame is obtained. If for the coupling piece 1, of Fig. 3
and 4, the piece shown in Fig. 5 is substituted, the pillar or bar b' may then be
turned around the socket n in which the axle of the fly wheel revolves. The
screw p¹ serves, in this case, to clamp the pillar at the desired angle to the
pillar .
The machine is ballasted by the weight of the man who works it. For this
purpose a bar q, Figs. 1 and 4, is put with its eye on the projecting top of leg d,
while its other end is made to rest in a notch of clamp attached to strut g'; the
board or platform s¹ is thereupon laid with its hook t' on the cross bar c¹, and with
the bars and v¹ attached to the same on bar q¹, and finally, the leg w¹ is suitably
adjusted and fastened in bar v¹. It will casily be seen that when a man stands on
the board & thus arranged his weight is mostly thrown on the three legs of the
frame.
If the machine is to be stayed against the roof of an excavation the prop ¹,
Fig. 6, is applied to the pillar k¹.
For rendering the machine more portable the fly wheel is removed from its
axle n. For this purpose the plate n³, Fig. 12, attached to the wheel, and 'tho
center notch of which grasps into a groove of the axle, is turned back after the
screw y¹ has been released, the fly wheel may then be drawn off.
Having thus described the nature and object of this Invention as communicated
to me by my correspondent, and the manner in which it is to be or may be put into
practice, I claim as new and important features of the same,-
1. The cam disk h provided with one or more cams i, k, the collar I, the divided
nut working on the screwed part w³ of the driving spindle, the bush n and
spring o, combined with each other, as and for the purpose described.
2. The driving spindle w, having one end spirally twisted, in combination with
the ratchet wheels rand z, as set forth and for the purpose specified.
3. The coupling piece l', Figs. 3 and 4, in combination with the two pillars or
rods b¹ and k¹, as stated and for the object in view.
4. The coupling picce, Fig. 5, consisting of two parts, which are angularly
adjustable with regard to each other, in combination with the pillars or rods b'
and k¹, as specified and for the purpose described.
5. The pillars or rods b' and ', Figs. 1, 3, and 4, the cross bar having legs d
and c', the clamping piece c¹, the jointed and revolving clamp ƒ³, and the strut g²,
combined with each other and with a rock-drilling apparatus, substantially as and
for the purpose stated.
6. The screwed prop ³, Fig. 6, in combination with pillar k' of the described
drilling machine.
7. The pillar or rod 61, Fig. 8 and 9, the cross bar e with legs d'and e', the
clamping piece c¹, the jointed and revolving clamp f¹, and strut g², combined with
each other and with a rock-drilling apparatus, as described and for the purpose set
forth.
8. The friction pall g in combination with the cam disk h of a rock-drilling
machine, as described.

page_text: 9. The platform s' resting on the cross bar c² and on clamp »¹ of strut g¹, in the
manner and for the purpose specified.
In witness whereof, I, the said Carl Pieper, have hereunto set my hand and
seal, this Eighteenth day of June, in the year of our Lord One thousand eight
hundred and seventy-eight.
CARL PIEPER (LS.)