An Improvement in Connection with Ordnance and Small Arms.
Year: 1888

page_text: Date of Application, 24th Aug., 1888
Complete Specification Left, 24th May, 1889-Accepted; 29th June, 1889
PROVISIONAL SPECIFICATION.
An Improvement in Connection with Ordnance and Small Arms.
1, WILLIAM SPEIRS SIMPSON, of 49 Battersea Park Road, Surrey, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in ordnance and small arms for
giving increased velocity to shot, without increasing the recognised charge of powder,
that is to say, that a well known standard of velocity is reached by a predetermined
charge of powder, either loose or compressed; but by this improvement I am enabled
to gain a much higher degree of velocity of shot with greater penetrating effect than
it is possible to get from the recognised charge of powder now used with ordnance
and small arms.
To gain this object I attach to the muzzle of ordnance or rifle, a tube of a
predetermined length, and bore, the bore in all cases being larger than the bore of
any ordnance or rifle io which it is attached.
In the matter of making new ordnance or rifles the addition of the tube will of
course be part and parcel of the barrel.
DL: oul
CA 1000
H. GARDNER,
166, Fleet Street, London, Agent for the said William Speirs Simpson.
COMPLETE SPECIFICATION.
An Improvement in Connection with Ordnance and Small Arms.
I WILLIAM SPEIRS SIMPSON of 49 Battersea Park Road, Surrey Civil Engineer, do
hereby declare the nature of my said 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 has for its object improvements in ordnance and small arms for
giving increased velocity and range to shot, without increasing the recognized charge
of powder; that is to say that a well known standard of velocity is reached by a
predetermined charge of powder either loose or compressed. But by this improve-
ment I am enabled to gain a much higher degree of velocity of shot with greater
penetrating effect than it is possible to get from the recognized quantity of powder
now used in the present charges with ordnance and small arms.
To gain this object I attach to the muzzle A of ordnance or rifle Pistol or like
firearm a tube of a predetermined length, bore and diameter as shown at Figure 1
of the annexed drawings by screwing it on or otherwise, the bore Cin all cases
being larger than the bore D of any ordnance or rifle to which it is attached.
For the matter of making new ordnance or rifles the addition of the tube will of
course be part and parcel of the barrel as indicated at Figure 2.
The annexed drawings indicate the nozzle A of a Martini Regulation Rifle of
true dimensions, the additional or extension tube B being of the exact length and
diameter ascertained after many trials to be that proper for such a rifle, all other
size small arms whether of the Pistol or rifle kind being proportionately correct
therewith as also Field Guns, Fort Guns, Naval Guns, and others in which flour,
grain, pebble or pellet or like powder is employed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what
I claim is :-
Fitting or arranging a tube B on or with the muzzle end of an ordinary rifled arm

page_text: or gun, said tube B having a larger internal diameter than that of the barrel
proper and constituting an extension of the barrel A as and for the purpose
described and substantially as indicated by the annexed drawings.
The 24th day of № 1880
H. GARDNER,
166; Fleet Street, London, Agent for the said W. S. Simpson.