Improvements in Gunpowder Charges for Sporting Fire Arms.
Year: 1890

page_text: Date of Application, 25th June, 1890
Complete Specification Left, 25th Mar., 1891--Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Gunpowder Charges for Sporting Fire Arms.
We, CHARLES WILLIAM CURTIS of 74 Lombard Street in the City of London,
Gunpowder Manufacturer and LEYSHON DAVIES, Assistant Manager of the
Kames Gunpowder Works, Argyleshire, do hereby declare the nature of this
invention to be as follows:-
:-
We make the charge in the shape of a cylinder to easily fit the cartridge case,
and with a central rear depression corresponding with the fulminate cap and with a
smaller recess in continuation of the said depression and reaching nearly to the
front end. The amount of compression would as an example be to almost half the
original bulk, but the quality, density, and amount of moisture in the sporting
powder used, are modifying elements to be considered; the powder used should, for
economy's sake be in the unfinished state before the final polishing processes. As
compared with the ordinary loose powder charge, our compressed charge has the
following advantages viz.: reduced lateral pressure on the bore of the gun, because
the explosion is rendered more gradual; an increased velocity without commensu-
rate increase in the kick of the gun; greater penetration; relative increase in the
length of barrel traversed by the charge because the latter is reduced in length;
less fouling; less inconvenience from smoke, because the latter is carried away
further from the shooter; increased facility and safety in loading and handling;
less hydroscopicity; greater portability, and decreased cost of transport because of
decrease in bulk; and economy in the manufacture because some of the final
processes of manufacture of the powder are dispensed with.
Dated this 25th der of Lune 1900
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Gunpowder Charges for Sporting Fire Arms.
We, CHARLES WILLIAM CURTIS of 74 Lombard Street, in the City of London
Gunpowder Manufacturer and LEYSHON DAVIES, Assistant Manager of the
Kames Gunpowder Works, Argyleshire, 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 :-
We make the charge in the shape of a cylinder to easily fit the cartridge case,
and with a central rear depression corresponding with the fulminate cap and with a
smaller recess in continuation of the said depression and reaching nearly to the
front end as shown in the example on the drawing in section by Fig. 1 and in plan
by Figure 2. The amount of compression would as an example be to almost half
the original bulk but the quality, density, and amount of moisture in the sporting
powder used, are modifying elements to be considered; the powder used should, for
economy's sake, be in the unfinished state before the final polishing processes. As
compared with the ordinary loose powder charge our compressed charge has the
following advantages viz.: reduced lateral pressure on the bore of the gun, because
the explosion is rendered more gradual; an increased velocity without commensu-
rate increase in the kick of the gun; greater penetration; relative increase in the
length of barrel traversed by the charge because the latter is reduced in length;
less fouling; less inconvenience from smoke because the latter is carried away
further from the shooter; increased facility and safety in loading and handling;
Price 11

page_text: less hygroscopicity; greater portability, and decreased cost of transport because of
decrease in bulk; and economy in the manufacture because some of the final
processes of manufacture of the powder are dispensed with.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. The application and use for sporting fire arms of compressed gunpowder
charges recessed in the rear substantially as set forth.
Dated this 25th day of March 1891
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.