Improvements in Cartridge Cases.
Year: 1890

page_text: Date of Application, 2nd Dec., 1890
Complete Specification Left, 2nd Sept., 1891-Accepted, 10th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Cartridge Cases.
We, JOHN COPE BUTTERFIELD, of 13 Westminster Chambers, F.I.C., F.C.S.,
Analyst, and TELFORD CLARENCE BATCHELOR, of 8 Baron's Court Road,.
Engineer, both in the County of Middlesex, do hereby declare the nature of our
invention to be as follows:-
This invention is designed for the protection, especially from damp, of explosive
cartridges used more particularly for mining and similar purposes, where they are
liable to be exposed for a longer or shorter period to the effects of damp or
moisture, or in some cases to be absolutely submerged in water. Previously we
have made these cases of thin metal closed at one end by a cap in various ways,
but while these cases have proved exceedingly satisfactory for the larger sizes and
may be used satisfactorily for the smaller sizes we have nevertheless found that the
expense of them for small sizes is in proportion much greater than for the larger
sizes, and the present invention is more particularly directed towards the reduction
in the cost of manufacture for the smaller sizes. Notwithstanding, the improved
case now to be described may be used for larger sizes as well as smaller ones.
The two
The chief cause of the expense of the cases constructed hitherto appears to lie
in the great length of the case in proportion to its diameter and in the present
invention we get over this difficulty by making the junction in the centre or there-
abouts instead of at one end or in other words the cap instead of being merely a
short piece to close up one end is as long as the other part of the case.
halves or portions of the case after being filled with the explosive powder are
placed together preferably telescopically, one extending for a short distance over
the other, and are then secured together in any suitable manner it being of course
preferable that the junction should be damp-proof as well as the material of which
the case is made. In the case of solid cartridges the cartridge can be placed in
one portion of the case, and the other portion or cap placed on top of it and the
junction then effected. Some ways of making this junction are to run a screw-
thread upon each portion in manufacturing it and screw them together with a little
paraffine or paint between; or, after screwing together the joint may be protected
by paint paraffine or the like.
Or, instead of screwing the two parts together they may be simply placed one
inside the other and "choked " or grooved together. Many other means for
connecting the two parts will readily suggest themselves to those conversant with
such matters.
Another advantage of these cases is that they may be formed of conical or taper
shape which facilitates the manufacture; and instead of being parallel the two
parts may be made larger at their open ends.
Dated this 28th day of November 1800.
W. P. THOMPSON & BOULT,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Cartridge Cases.
We, JOHN COPE BUTTERFIELD of 13 Westminster Chambers, F.I.C., F.C.S.,
Analyst, and TELFORD CLARENCE BATCHELOR of 8 Baron's Court Road,
Engineer, both in the County of Middlesex, do hereby declare the nature of our
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 is designed for the protection, especially from damp, of explosive
cartridges used more particularly for mining and similar purposes, where they are
liable to be exposed for a longer or shorter period to the effects of damp or
moisture, or in some cases to be absolutely submerged in water. Previously we
have made these cases of thin metal closed at one end by a cap in various ways,
but while these cases have proved exceedingly satisfactory for the larger sizes and
may be used satisfactorily for the smaller sizes we have nevertheless found that the
expense of them for small sizes is in proportion much greater than for the larger
sizes, and the present invention is more particularly directed towards the reduction
in the cost of manufacture for the smaller sizės. Notwithstanding, the improved
case now to be described may be used for larger sizes as well as smaller ones.
The chief cause of the expense of the cases constructed hitherto appears to lie
in the great length of the case in proportion to its diameter and in the present
invention we get over this difficulty by making the junction in the centre or there-
abouts instead of at one end or in other words the cap instead of being merely a
short piece to close up one end is as long as the other part of the case.
The two
halves or portions of the case after being filled with the explosive powder are
placed together preferably telescopically, one extending for a short distance over
the other, and are then secured together in any suitable manner it being of course
preferable that the junction should be damp-proof as well as the material of which
the case is made. In the case of solid cartridges the cartridge can be placed, in
one portion of the case, and the other portion or cap placed on top of it and the
junction then effected. Some ways of making this junction are to run a screw-
thread upon each portion in manufacturing it and screw them together with a little
paraffine or paint between; or, after screwing together the joint may be protected
by paint paraffine or the like.
Or, instead of screwing the two parts together they may be simply placed one
inside the other and "choked " or grooved together. Many other means for
connecting the two parts will readily suggest themselves to those conversant with
such matters.
Another advantage of these cases is that they may be formed of conical or taper
shape which facilitates the manufacture; and instead of being parallel the two parts
may be made larger at their open ends.
In the accompanying drawings,
Figure 1 represents a complete case or shell closed up,
Figure 2 represents a similar case but with a particular manner of closing, and
Figure 3 represents one half of the case.
A are the half cases or shells each of which is practically of the same length and
size but adapted to fit one within the other forming a junction at B the centre of
the complete case, which thus has a central swell or bulge and assumes somewhat
of the shape of a cask. As already explained various means may be adopted for
making this junction tight as for example screwing the one into the other or by
merely running a line round the junction (choking it) as indicated in Figure 2
where C is a line or groove formed around the case after the two parts have been
put together.
In Figure 3 the half case is shown screwed externally ready for fitting inside
the other half case which would be screwed internally. In Figure 1 a portion of

page_text: one of the cases A is shown broken away to show the end of the other case A
fitting inside it. All these cases A. are shown tapered being somewhat larger at
their open ends to facilitate the manufacture.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A. metallic cartridge case composed of two approximately equal shells or
cases such as A joined at about the centre of the complete case substantially as
described and illustrated in the accompanying drawings.
2. A metallic cartridge case formed of two approximately equal tapered shells
such as A joined at their larger ends and forming a case with a central bulge or
swell substantially as described and illustrated in the accompanying drawings.
3. A metallic cartridge case having the junction approximately in the centre of
its length substantially as described.
D
11 1
1001
JOHN COPE BUTTERFIELD.
TELFORD CLARENCE BATCHELOR.
W. P. Thompson & Boult,
Agents for the Applicants.
JOHN COPE BUTTERFIELD.
TELFORD CLARENCE BATCHELOR.
W. P. Thompson & Boult,
Agents for the Applicants.