Improvements in Machinery for Manufacturing Metal Cartridge Cases.
Year: 1889

page_text: Date of Application, 5th Sept., 1889
Complete Specification Left, 5th June, 1890-Accepted, 19th July, 1890.
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PROVISIONAL SPECIFICATION.
Improvements in Machinery for Manufacturing Metal Cartridge
Cases.
1
I ARTHUR GREENWOOD, of Albion Works, Leeds, in the County of York, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to a novel arrangement of mechanism for finishing metal
cartridge cases, that is to say, forming on the head of the case a flange or an extractor
the case.
groove, and reaming the open end
To this end I provide a chuck for the reception of the case, and for imparting
rotary motion thereto, as the grooving or flanging cutter and the reamer are brought
into action. The chuck is mounted in a pair of cheeks, between which it is fitted
with a pulley for imparting rotation thereto.
The cases are fed to the machine down an inclined curved shute, and deposited one
by one onto a travelling slide, which carries them within reach of a pair of spring
tongs mounted on a rock shaft carried by standards. These tongs, on descending,
seize the case, and place it in line with the axis of the chuck. A plunger then cones
forward, drives the case into the chuck, and projects its open end beyond the chuck.
This movement of the plunger is controlled by a grooved cam, the rotation of which
advances and withdraws the plunger.
A second cam, on the same cam shaft, serves to operate a second plunger, which
drives out the case, when finished, from the chuck.
While the plunger which thrusts the case into the chuck, is still retaining it in
position, a cutter is advanced at right angles to the axis of rotation of the chuck, to
form an annular groove in the head of the case, or turn down the solid metal to form
a flange; this cutter is carried by a slide, which is advanced by a tension spring
controlled by an edge cam on the cam shaft. While this cutter is acting, a reamer,
advanced simultaneously with it, is caused to operate on the edge of the case, and take
off the arrises. This tool is mounted on a double slide, which advances it at right
angles to its work, and when opposite, by a lateral movement, brings it into contact
therewith. These movements of the compound slide are obtained from tension springs
controlled by edge and face cams on the cam shaft. Cams are also provided on the
same shaft for advancing and retracting the feed slide, and for working the rock shaft
which carries the spring tongs.
When the finishing of the case is effected, the tools are withdrawn, the plunger
first mentioned is retired, and the second plunger is simultaneously advanced, and
caused to thrust the case out of the chuck, when it will fall into any suitable
receptacle.
COMPLETE SPECIFICATION.
Improvements in Machinery for Manufacturing Metal Cartridge
Cases.
I ARTHUR GREENWOOD of Albion Works, Leeds, in the County of York, 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:-
This invention relates to a novel arrangement of mechanism for finishing metal
cartridge cases, that is to say, forming on the head of the case a flange or an extractor
groove. and reaming the open end of the case.

page_text: To this end provide a chuck for the reception of the case, and for imparting
rotary motion thereto, as the grooving or flanging cutter and the reamer are brought
into action.
The cartridge case to be operated upon is thrust into the chuck, and held therein
while the operation is proceeding, by the advance of a horizontal pusher or plunger,
and simultaneously with the withdrawal of this pusher, a second pusher or plunger
advances, presses against the open end of the case, and thrusts it out of the chuck.
The cases are fed one by one into a travelling slide, from which they are taken by
a pair of tongs, and presented to the chuck ready to be thrust therein.
In the accompanying drawings,
Fig. 1 is a plan view of the improved machine, the chuck containing the case to be
operated upon, and the cheeks which carry the chuck, being shewn in section.
Fig. 2 is a side elevation of the machine.
Fig. 3 is a cross section, taken in the line 1, 2 of Figs. 1 and 2, and looking in the
direction of the arrow.
Fig. 4 is a cross section, also taken in the line 1, 2 of Figs. 1 and 2, and looking
in the opposite direction.
In these Figures, A is the bed plate of the machine, carrying a pair of box
castings A' A'*, in which is mounted a cam shaft B. is a chuck mounted in a
pair of gun metal cheeks C', carried by a standard A³, bolted to the bed plate, and
forming a third bearing for the cam shaft. This chuck is fitted between the cheeks
with a band pulley C, for imparting rotation thereto.
Dis an inclined curved shute, down-which-the-cases are fed, and deposited one by
one on to a travelling slide E, for transference to the chuck. The shute D is
mounted upon a standard A³, bolted to the bed plate, and immediately below the
shute a channel is cut in the head of the standard, to receive the slide E, and guide
it in its course.
This slide is recessed transversely at its front end to receive the
foremost of the cases e, delivered from the shute when in its back position, as shown
at Fig. 3. A retaining strip of metal d, fixed across the end of the shute, serves to
arrest the progress of the of the cases, and prevent their rolling out from the shute,
except when the slide is in its back position.
The standard A³ is divided vertically below its head, and within it is mounted a bell
crank lever E', the upper arm of which projects through the head of the standard, and
enters a notch made to receive it in the under side of the slide.
The shorter arm of this bell crank lever carries a bowl which bears upon the edge
of a cam E2, on the cam-shaft B, shewn in side view at Fig. 3.
A tension spring E³, connected with the lever E', and pendent from the head of
the standard A³, serves to thrust forward the slide with its load, when not restrained
by the retarding action of the cam E².
The advance of the slide E, under the action of the spring E³, brings the case
which it carries within reach of a pair of spring tongs f, carried by a lever arm F.
This arm is keyed to a rock shaft F1, mounted in bearings in short standards bolted to
the bed plate.
A short arm F, also keyed to the rock shaft F', is connected by a link rod F³, to a
rock lever F, pivotted to the box casting A¹. This rock lever is furnished with a
bowl which bears upon a cam F on the cam shaft, B.
A spring F, attached to a standard of the rock shaft F1, is connected to the joint
pin of the rock lever F, and serves to draw down the spring clips f, and cause
them to grip the case e presented to them by the slide E, when a depression of the
cam F is presented to the bowl of the rock lever.
This cam F (see Fig. 3) is so shaped as to ensure the lifting of the spring clips,
with their load, clear of the slide, then permit of their presenting the case to the
chuck, and holding it in position for a pusher g to thrust it into the chuck, and
lastly, effect the lifting of the clips out of contact with the case, into their normal
position, ready to descend again under the pull of the spring F6, and seize another
case presented to them by the slide E.
The pusher g is carried by a slide G, which works in a guide formed for it on the

page_text: box casting A. This slide carries a bowl which works in a grooved cam G', keyed to
the cam shaft B, and situate within the box casting. The rotation of this cam imparts
the required reciprocating motion to the pusher g, causing it to drive out the case e
from the spring clips f, and take up the position in the clutch shown in Fig. 1, the
pressure upon the head of the case being maintained during the grooving and reaming
operation.
To maintain this pressure without friction on the case, the end of the pusher is made
free to rotate with case, the pusher rod being drilled to receive the rounded shank
with which the rotating piece is formed.
is the grooving cutter, carried by a sliding tool holder H, which moves in guides.
formed on the standard A, bolted to the bed plate. This slide H is recessed at its
under side to receive the head of a rock lever H', fulcrummed on the standard.
H2 is a tension spring for drawing the cutter slide away from its work, and holding
the tail of the rock lever against an edge cam H³, keyed to the cam shaft B. This
cam, the cut of which is shewn in the section Fig. 3, serves to advance the tool h, and
cause it to turn an annular groove in the solid headed case, or, in the case of a flange
headed case, trim the flange into shape. While this operation is proceeding, the
reaming tool i is brought into action. This tool is carried by a slide I, which is
mounted on, and moves transversely of a slide 1', which slide tits in guides set
at right angles to the cam shaft. These slides are controlled by their respective
cams I*, *, keyed to the cam shaft B. The slide I, is held in contact with its
cam by a compression spring, shewn by dots in Figs. 1 and 4, and the slide I
is held by a compression spring in contact with the head of a rock lever 12,
fulcrummed on the slide 1', and bearing against the face cam I*.
As, therefore, the cam shaft rotates, the reaming tool i will be advanced into line
The
with the case e, and then pressed into contact with the open end of the case.
rapid rotation of the case at this moment will cause the tool, by reason of its
The tool will then retire
double cutting edge, to remove the arriss from the case.
from, as it advanced to, its working position, and leave room for the advance of
the discharging pusher. This pusher is shewn at kas carried by a slide K, which
works in a guide formed for it in the box casting A*. This slide, like the slide G,
carries a bowl which works in a grooved cam K³, keyed to the cam shaft B, and
situate within the box casting. This cam is so timed with respect to the grooved
cam G¹, that it will impart a reciprocating motion to the pusher k in reverse
order to the motions of the pusher g. Thus, when the action on the case is
complete, and the pusher g retires, the pusher k will advance, and thrust the case
out of the chuck, discharging it into a receiver below.
On one end of the cam shaft B, is keyed a spur wheel B¹, into which gears a
spur pinion B², carrying on its boss a band wheel B³. This pinion is mounted
loosely on a stud axle projecting from the end of the bed plate.
As, therefore, the band pulley is driven, the cams on the cam shaft will be rotated,
and the movements of the feed slide, spring tongs, plungers, and cutting tools, will
proceed in order above indicated.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The improved machinery above described for simultaneously grooving or flange-
finishing and reaming cartridge cases.
1000