Improvements in or relating to Revolver Small Arms.
Year: 1893

page_text: Date of Application. 21st Oct., 1893
Complete Specification Left, 20th July, 14-Accepted. 25th Aug.. 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Revolver Small Arms.
I, JOHN FRANCIS LATHAM, of 27 Pall Mall, in the County of Middlesex,
Gun-maker, do hereby declare the nature of this invention to be as follows:-
This invention relates to pistols and other small arms of the revolving type the
object being to enable them to be used with smaller cartridges than those for which
the weapon is primarily adapted. In carrying out the invention I provide the
ordinary barrel of the pistol with a smaller removable or duplicate barrel which
can be applied or withdrawn as desired, and I prefer to connect this barrel with a
revolving cylinder the barrel and cylinder being so proportioned as to occupy in
the pistol the space usually occupied by the cylinder alone. Both the duplicate
cylinder and barrel are of the desired smaller bore. The extractor and the means
for securing revolving and detaining the duplicate parts in the pistol may be of the
ordinary construction excepting that the extractor is adapted to the smaller bore,
the new parts being adapted to operate in conjunction with the rest of the mechanism
of the pistol.
If desired the duplicate barrel may be arranged to fit the pistol independently of
the duplicate cylinder but it is more convenient to have the two connected together
so as to be applied or removed together as one fitting and I therefore prefer to fit
the duplicate barrel with a block or strap at its breech end into which block or
strap a portion of the cylinder may enter."
Dated this 21st day of October 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Revolver Small Arms.
I, JOHN FRANCIS LATHAM of 27 Pall Mall, in the County of Middlesex,
Gun-maker, 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 pistols and other small arms of the revolving type the
object being to enable these to be used with smaller cartridges than those for which
the weapon is primarily adapted. In an earlier Specification No. 17790 I have
described the application to a revolver of a smaller barrel so as to make the pistol
suitable for saloon firing, but this reduces the capacity of the pistol to a single shot
making it in effect a single shot pistol and not a revolver; in the present invention
the weapon is still a revolver although it fires smaller cartridges than those for
which its larger bore would suit it.
In carrying out the invention I provide the ordinary barrel of the pistol with a
smaller removable or duplicate barrel which can be applied or withdrawn as desired
and connect this barrel with a revolving cylinder the breech end of the barrel and
cylinder being so proportioned as to occupy in the pistol the space usually occupied
by the cylinder alone; both the duplicate cylinder and the barrel are of the desired
smaller bore. The extractor and the means for securing, revolving and retaining
the duplicate parts in the pistol may be of the ordinary construction, excepting that
Price 8d.1

page_text: the extractor is adapted to the smaller bore the new parts being adapted to operate
in conjunction with the usual mechanism of the pistol.
If desired the duplicate barrel may be arranged to fit the pistol independently of
the duplicate cylinder but it is more convenient to have the two connected together
so as to be applied or removed together as one fitting and I therefore prefer to fit
the duplicate barrel with a block or strap at its breech end into which block or
strap a portion of the cylinder may enter.
The invention will be best understood by reference to the accompanying drawings
in which :-
Figure 1 is a longitudinal section through the barrel and most of the working
parts of the apparatus.
Figure 2 a vertical cross section upon the line y—y of Figure 1.
Figure 3 is a side elevation and
Figure 4 a breech end elevation of the small bore barrel.
Figure 5 a view similar to Figure 1 but showing the pistol with its large bore
fittings, the muzzle end of the barrel being broken away.
Figures 6 and 7 are respectively end views of the cylinders for the smaller and
larger cartridges.
Like letters represent like parts throughout the drawings.
Figure 5 represents the breech portion of an ordinary break-down or hinged"
frame revolver pistol with the parts suited for the full sized cartridge the mechanism
for revolving the cylinder extracting the cartridge etc. being all of well known con-
struction. In Figure 1 the same mechanism is adopted throughout but the barrel A
is provided with the supplemental or small bore barrel B adapted to fit in any
convenient manner preferably by means of the two soft metal sleeves B'. The
barrel B is provided with the block or strap B' into the socket B³ of which fits the
small end C of the sinall bore cylinder C, the collar C fitting outside the strap
portion B so that the two small bore parts, the barrel and the cylinder, may be
inserted and withdrawn together as one fitting although they can be dealt with
separately if desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. Converting a pistol or other similar small arm of the revolver type from a
large bure to a small bore by the application of a small bore cylinder and barrel in
the manner substantially as described.
2. The combination with a pistol or similar small arm of the revolver type of a
small bore barrel such as B adapted to fit inside the large bore barrel of the pistol
and a cylinder such as C adapted to replace the large bore cylinder substantially
in the manner described and illustrated in the accompanying drawings.
3. In a pistol or similar small arm of the revolver type the employment of a
small bore barrel such as B having a block or strap such as B' at the breech end
for the reception of a small bore cylinder substantially as described and illustrated
in Figures 3 and 4 of the accompanying drawings.
Dated this 20th day of July 1894.