Improvements in Breech Loading Fowling Pieces or Sporting Guns and in Cartridges therefor.
Year: 1887

page_text: Date of Application, 24th Jan., 1887
Complete Left, 24th Oct., 1887
Complete Accepted, 24th Jan., 1888
Improvements in Breech Loading Fowling Pieces or Sporting Guns
and in Cartridges therefor.
I EDWARD WHITTRED ILTYD PETERSON of 26 Bury Street, St. James's in the
County of Middlesex Gentleman do hereby declare the nature of this invention to be
as follows:-
This invention relates to certain improvements in fowling pieces or sporting guns
and in cartridges therefor the object being to construct a chamber at the breech end
of the barrel so as to contract or choke the mouth of the cartridge case when it is
exploded and give greater resistance to the gases produced on the combustion of the
powder within the cartridge case and thereby materially increase the velocity and
penetration of the shot.
In carrying the invention into practice the breech of the barrel is bored so as to fit
the loaded cartridge exactly both in length and diameter. The cartridge of the
dimensions required has a portion of the case turned in at the outer end in such
manner and to such extent as that when the charge is exploded the turned in portion
will be extended beyond the shoulder oxisting between the chamber formed at the
breech end of the barrel and the remainder of the barrel. In this way when the
charge is exploded the folded end of the cartridge will be laid out over the said
shoulder so formed between the said breech chamber and the barrel and so reduce, the
thickness of the cartridge-case, the aperture through which the shot is discharged
and choke the gas chamber which said gas chamber consists at the moment of firing
of the cartridge case and the improved breech end of the barrel.
The Invention can be applied to existing guns by cutting off a portion of the barrel
or barrels and finishing it or them so as to make the chamber fit the loaded cartridge
or in some cases it will be desirable to fill into the chamber a ring piece of steel to
form the chamber required.
WALTER A. BARLOW.
6, St. Paul's Churchyard, E.C.

page_text: COMPLETE SPECIFICATION.
Improvements in Breech Loading Fowling Pieces or Sporting Guns
and in Cartridges therefor.
I EDWARD WHITTRED ILTYD PETERSON of 26" Bury Street St. James's in the
County of Middlesex, Gentleman 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 certain improvements in fowling pieces or sporting guns
and in cartridges therefor the object being to construct a chamber at the breech end
of the barrel so as to contract or choke the mouth of the cartridge case when it is
exploded and give greater resistance to the gases produced on the combustion of the
powder within the cartridge case and thereby materially increase the velocity and
penetration of the shot. This invention is designed for guns and cartridges in which
"small-shot" is used not bullets.
In carrying the invention into practice the breech of the barrel is bored so as to fit the
loaded cartridge exactly both in length and diameter. The cartridge of the dimensions
required has a portion of the case turned in at the outer end in such manner and to
such extent as that when the charge is exploded the turned in portion will be extended
beyond the shoulder existing between the chamber formed at the breech end of the
barrel and the remainder of the barrel. In this way when the charge is exploded
the folded end of the cartridge will be laid out over the said shoulder so formed
between the said breech chamber and the barrel and so reduce by the thickness of the
cartridge case the aperture through which the shot is discharged and choke the gas
chamber which said gas chamber consists at the moment of firing of the cartridge
case and the improved breech end of the barrel.
The Invention can be applied to existing guns by cutting off a portion of the barrel
or barrels and finishing them so as to make the chamber fit the loading cartridge or
in some cases it will be desirable to fill into the chamber a ring piece or bush of steel
to form the chamber required.
In the drawings annexed hereto the application of the Invention is illustrated.
Fig. 1 represents the cartridge loaded with powder and shot and the end of the
case turned in in the usual manner.
Fig. 2. shows in longitudinal section the breech end of the gun barrel as ordinarily
bored to receive the cartridge. The part a, allows of the turned-in end of the
cartridge case, after the firing has taken place, lying therein so that the interior of
the cartridge case is substantially in line with the bore of the gun.
Fig. 3. shows in like view to Fig. 2 the breech end of the gun bored according to
this invention so as that when the cartridge is fired the turned in end of the cartridge
case is laid out over the shoulder b, as shown at 61, so reducing by the thickness of
the cartridge case the bore or aperture through which the shot is discharged.
Fig. 4 shows the cartridge case removed after the firing has taken place.

page_text: Fig.
shows the application of the bush or ring-piece c, to form the required
chamber and shoulder b, in converting a gun of ordinary make.
Fig. 6 represents the gun barrel cut shorter to receive the cartridge and to choke
the same at the end of the case.
The cartridge case represented in Figs. 3 and 4 is an "Eley's No. 12" with
ordinary load of 3 drams of powder and 1 ozs. shot.
The point of novelty in this invention is that the cartridge chambers are so pre-
pared in relation to the cartridges to be employed that the turned-in part of the
cartridge which has always existed in shot cartridges is used to retard the gases
during combustion of the powder and not only to prevent the charge from shaking
out whilst the loaded cases are being carried about.
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 :-
In shot guns or fowling pieces the preparing of the cartridge chamber and
cartridges so that on firing the cartridge the end of the case b¹, will be laid out over
the shoulder b, to choke the cartridge case the same being constructed, combined and
operating as and for the purpose herein set forth.
WALTER A. BARLOW,
6, St. Paul's Churchyard, E.C.,
Agent for Applicant.