Machine for Drilling the Firing Holes in Cartridge Cases.
Year: 1894

page_text: Date of Application, 25th Dec, 1894
Complete Specification Left, 3rd Sept, 1895-Accepted, 26th Oct., 1895
PROVISIONAL SPECIFICATION.
[Communicated from abroad by DEUTSCHE METALLPATRONENFABRIK, of
Karlsruhe, Baden, Germany.]
Machine for Drilling the Firing Holes in Cartridge Cases.
I, CHARLES DENTON ABLL, of 28 Southampton Buildings, in the County of
London, Consulting Engineer and Chartered Patent Agent, do hereby declare the
nature of this invention to be as follows:-
This invention relates to an improved machine for drilling the hring holes in
cartiulge cases, which operates quite automatically. The attendant only requires
to introduce the cartridge cases into the feed channel, whereupon all the necessary
operations, such as the feed of the cartridge cases to the place of operation, the
gripping or holding of the same, the actuation and advance and retreat of the
drills, and the ejection of the cases, aic effected consecutively and automatically
The said machine is constructed as follows
The catrudge cases are introduced into an inclined or vertical feed channel; in
front of the lower opening of this there is a reciprocating horizontal shide which is
actuated from a diving shaft by means of a cam and elbow lever, which is pressed
continuously against the cam by a spring.
At the advance motion the slide seizes the bottom case and pushes it forward in
the axis of the gripping device.
During thus motion the spring at the lower end of the channel holds the case on
the shde so that it cannot fall off For holding c gripping the case, there is
provided a fixed abutment support and opposite this a spring centering bolt with
Coned end, both of which must be exactly in the same axis. The support has a
The
central projection which fits into the cap chamber of the cartridge case.
centering bolt is acted upon by a spring which presses it continuously towards the
fixed support while the bolt is at certain times pushed back by means of a cam ou
the diving shaft, acting on an elbow level. This latter movement takes place
during forward feed of the cases. But as soon as the case has arrived at its
forward position, the centering bolt spings forward, so that the case is then held
between the support and the conical end of the bolt, which projects somewhat into
the front end of the case.
After securing the case, the dulling of the holes is effected by means of the
following device.
Two dill spindles are placed at au augle to each other and the drills pass through
correspondingly forined passages in the beforementioned support, the drill spindles
receive their rotary motion fiom pullies thereon driven by belts and at the same
time they are advanced by the following means
The spindles can move in the axial direction in bearings which are fixed on the
fraining. In the latter there is also a slide receiving a to and fro motion from a
cam on the driving shaft. For this purpose the slide has a downward projecting
arm with a roller which is made to hear continuously against the cam by springs
acting upon the slide
The motion of the slide is transmitted to the drill spindles
by means of an intermediate part carried by the slide and having a double fork,
which embraces the two spindles so that these are moved to and fio in a corresponding
manner to the slide.
The slots of the fork at the same time allow the ends of the spindles in moving
backward and forward to approach to and recede from each other without being
thereby disconnected from the slide

page_text: It is of importance that the advance of the spindles shall not be a rigidly confined
motion, but shall take place in accordance with the momentary pressure of the
springs and the resistance of the material to be bored through.
The cam only serves for limiting the extent of the advance
The backward motion of the drill spindles is effected on the other hand by the
positive pressure of the cam against the roller beforementioned on the slide
It is preferred that the said forks do not directly engage with the spindles,
because, in consequence of the high speed of rotation, the parts would become
heated and wear too rapidly, there are consequently inter posed small bushes which
contain a lubricant and do not revolve, thus serving, as it were, as bearings for the
spindles, but they partako of the longitudinal motion and also slide to and fro
laterally in the forks in following the motion of the spindles, the bushes having
grooves into which the forks take.
All the motions are derived from the one driving shaft; the several cams have
of course to be so shaped that the separate devices perform their functions in the
proper sequence
After the forward feed of the cartridge case, the centering bolt is released so as
to secure the case to position, the spindles then advance so as to dull the case and
then ceede, whereupon the bolt is withdiawo and the case is set fice and diops
down; another case is then fed for waid and the operations are repeated.
With regard to the drilling operation, it is of importance that by the described
arrangement a slow and uniform advance can be effected, entirely independent of
any action of the attendant. The latter simply has to supply the cases to the feed
channel.
Dated this 28th day of December 1894.
ABEL & IMRAY,
Agents for the Applicant.
Machine for Drilling the Firing Holes in Cartridge Cases.
I, CHARLES DENTON ABEL, of 28 Southampton Buildings, in the County of
London, Consulting Engineer, and Chartered Patent Agent, 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 :-
This invention relates to an improved machine for dulling the firing holes in
cartridge cases, which operates quite automatically. The attendant only requires
to introduce the cartridge cases into the feed channel, whereupon all the necessary
operations, such as the feed of the cartridge cases to the place of operation, the
gripping or holding of the same, the actuation and advance and retreat of the drills,
and the ejection of the cases, are effected consecutively and automatically.
The said machine is constructed as will descube with reference to the
accompanying drawing in which Fig. 1 shens a longitudinal section, Fig. 2 a
sectional plau, Fig. 3 a cross section Figs. 4 and 5 enlarged views of the dulling
apparatus, and Fig. 6 a separate view of the fork for advancing the drill.
The cartridge cases H are introduced into an melined or vertical feed channel A
in front of the lower opening of this there is a reciprocating horizontal slide B which
1s actuated as shewn at Fig. 3 from a diving shaft W by means of a cain M and.
elbow lever Q which is pressed continuously against the cam by a spring S.
At the advance notion the slide B seizes the bottom case and pushes it forward
in the axis of the gripping device. During this motion the spring Fat the lower
end of the channel holds the case on the slide so that it caunot fall off.

page_text: For holding or gripping the case, there is provided a fixed abutment support G
the face of which is formed as n vertical plane surface and opposite this a spring
centering bolt with coned end C both of which must lie exactly in the same axis.
The support has a central projection Fig. 4 which fits into the cap chamber of
the cartiidge case
But as
The centering bolt C Fig 2 is acted upon by a spring D which presses it
continuously towards the fixed support G while the bolt is at certam times pushed
back by means of a cam N on the driving shaft W acting on an elbow level T.
This latter movement takes place during the forward feed of the cases I
soon as the case has arrived at its forward position, the centering bolt C springs
forward so that the case is then held between the support G and the conical end of
the bolt (which projects somewhat into the front end E of the case as shewn at
Figs. 2 and 4.
After securing the case, H the drilling of the holes is effected by means of the
following device, shewn to a larger scale at Figs. 4 and 5.
Two drill spindles K. with drills I are placed at an angle to each other and the
drills pass through correspondingly formed passages the beforementione
support G; the drill spindles K receive their rotary motion from pullies K' thereon
driven by belts, and at the same time they are advanced by the following means.
The spindles can move in the axial direction in bearings L which are fixed on
the framing P. In the latter there is also a slide U receiving to and fro motion
from a cam on the diving shaft W For this purpose the slide has a downward
projecting arm with a roller X which is made to bear continuously against the
oain by springs V acting upon the slide U. The motion of the slide is trans-
mitted to the drill spindles by means of an intermediate pait Z carried by the slide
and having a double fork Y which embraces, with its prongs Y Figs 2 and 6, the
two spindles, so these are moved to and fro in a corresponding manner to the
slide U
The prongs of the fork at the same time allow the ends of the spindles in
moving backward and forward to approach to aud recede from each other without
being thereby disconnected from the slide U.
It is of importance that the advance of the spindles shall not be a igidly
confined motion. but shall take place in accordance with the momentary presque
of the springs V and the resistance of the material to be bored through.
The cam only serves for limiting the extent of the advance.
The backward motion of the drill spindles 18 effected on the other hand by the
positive pressure of the cam against the roller X beforementioned on the slide.
It is preferred that the said forks Y' do not directly engage with the spindles,
because, in consequence of the high speed of rotation, the parts would become
heated and wear too rapidly; there are consequently inter posed small bushes d
which contain a lubricant and do not revolve, thus serving, as it were, as bearings
for the spindles, but they partake of the longitudinal motion and also slide to and
fro laterally in the forks in following the motion of the spindles, the bushes having
grooves into which the forks take
All the motions are derived from the one driving shaft W, the several
coms M NO have of course to be so shaped that the separate devices perform their
functions in the proper sequence.
After the forward feed of the cartridge case, the centering bolt C is cleased so
as to secure the case in position; the spindles then advance so as to drill the case
and then accede, whereupon the bolt C is withdrawn and the case 11 is set fico
and drops down, another case is then fed forward and the operations are
repeated.
With regard to the drilling operation, it is of importauce that by the described
arrangement a slow and uniform advance can be cílected, entirely independent of
any action of the attendant. The latter simply has to supply the cases to the feed
cbannel.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
-
1. An automatic machine for drilling the fing holes in cartridge cases, wherein
the car tudge case is advanced by means of a slide B and is held during the drilling
in an accurately axial position between a fixed abutment G and a centering bolt C
entering the opening of the case and capable of moving to and fro, the fixed
abutment being provided with openings for the passage of the drill spindles which
are thus guided directly in front of the place where they operate, substantially as
described.
2. In a machine for drilling the firing holes of cartridge cases such as is referred
to in the first claim, the use for actuating the dull spindles K situated at an angle
to each other, of a slide U carrying the advancing fork and receiving its forward
motion by means of springs V, while a cam O serves to control such forward motion
aud to effect the backward motion of the slide, substantially as described.
3 In a machine for drilling the firing holes of cartiidge cases such as 19 referred
to in the first claim, the use, for facilitating the advance of the drills, of beatings or
bushes that can shift laterally between the prongs Y' of forks Y bat do not rotate
with the dill spindles, substantially as described.
4. In a machine for dilling the fiing holes of cartridge cases such as is referred
to in the first claim, the use of a reciprocating slide B in combination with the
plane surface of the abutment G which slide sei ves to hung the cartridge case in
front of the plaue surface of the abutment and to hold it there until it is gripped by
the centering bolt C, whereupon the slide moves backwards, and after the drilling
of the case has been effected the centering bolt C is withdrawn for allowing the
case to fall freely substantially as described.
Dated this 3rd day of September 1895,
ABEL & IMRAY,
Agents for the Applicant.