Year: 1899

page_text: Date of Application, 10th Nov., 1899-Accepted, 13th Jan., 1900
A communication by HALVARD FOLKESTAD LANDSTAD, of 2, Kort Adlersgade,
Christiania, in the Kingdom of Norway, Mechanical Engineer.
I, GEORGE CECIL DYMOND, M.I.M.E., of the Firm of W. P. Thompson & Co.,
Agents for Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank
Street, Manchester, both in the County of Lancaster, 118, New Street, Birming
ham, in the County of Warwick, and 322, High Holborn, in the County of
Middlesex, Patent Agent, 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 :-
In a revolver the following features are desirable:--
1. That the magazine be arranged for quick-loading so as to enable the opera-
lor to constantly keep the revolver in his right hand, while loading with his left.
2. That the hammer can be constantly held at full cock without being secured,
affording, however, the same safety against accidental discharge as is obtained
by securing meaus so as to avoid loss of time by releasing before the first shot
can be discharged and to avoid the necessity of cocking at the beginning of
the fire.
3. That the revolver can be used as a single loader while the magazine is
filled.
4. That the empty cartridges be ejected automatically at each shot.
5. That the pull be easy and pleasant the hammer being at the same time
cocked automatically.
6. That the mechanism be locked automatically after the last shot from the
magazine, thus warning the operator, that new cartridges must be put in.
Furthermore the elements of the mechanism ought to allow of their being easily
assembled, the connection being therefore preferably not effected by screws,
whilst the construction ought otherwise to be so simple as to allow of cheap
manufacturing.
All these advantages are embodied in the present invention, which has for its
object to construct a revolver in which the mechanism is operated automatically
by means of the recoil, and which is peculiar by having a cylinder with only
two chambers each of which communicates in turn with a magazine arranged
within the stock or butt of the revolver.
In the accompanying drawings: -
Figure 1 is a longitudinal sectional elevation of a revolver embodying the
present invention.
Figure 2 is a section along the line A-A Figure 1, and
Figure 3 is a cross section of the cylinder.
Figure 4 is a side view of the revolver, the mechanism being shown in dotted
lines and the hammer in the cooked position.
Figure 5 also shows a side view of the revolver with the breech block and
hammer in the rearward position, an empty cartridge being ejected.

page_text: 1 is the barrel, 2 the cylinder containing, only two chambers, 3, placed din-
metrically opposite to each other and revolving, on the pulling of the trigger,
through 1800 under the influence of a suitable mechanism connected with the
trigger 4. The upper chamber of the cylinder corresponds with the barrel, and
the lower ono with a magazine 6 arranged within the butt 5. The breech
block 7 is seated in suitable guides as to be thrown to the rear by the recoil,
thereby causing the hammer to be cocked, and on the following forward move-
ment under the influence of the recoil springs, 8, 9, it takes a cartridge from
the magazine into the lower chamber. The breach block is provided with a
guiding rod 11 placed parallel to the barrel and serving at the same time as the
arbor for the cylinder, and one recoil spring is mounted around this rod in front
of the drum, the other recoil spring being mounted on a tenon at the rear of
the breech block and having abutment against the breech piece 12, formed by
the breech covering 13. The hammer 14 is lodged within the breech block and
surrounded by the main spring 15. A spring extractor 10 is mounted on the
top of the breech block, the securing means of the same serving at the same time
to hold the hammer and main spring fairly home.
The sears 17 and 18 by means of which the hammer is kept on full cock, and
also released on the pulling of the trigger, are lodged in the compartment 19,
Figure 2, and suitably secured to the covering 13 so as to be dismounted in
common with the same. The said sears 17 and 18, by which the hammer is
operated are capable of swinging a little, the former being pivoted at 19 and the
latter at 20. The second sear 17, which is nearer to the hammer, is provided
with a nose 22 bevelled on its upper part, which is adapted to engage a stud 23
on the hammer in the cocked position of the same as shown in Figure 4. Fitted
into the same sear is also a spring, which has abutment downwardly on the
adjacent first sear 18 and constantly acts to press the second sear 17 upwards,
thereby causing the nose 22 to engage the stud 23 on the hammer. The spring
will act on the sear 18 in such a way, as to constantly press the front end, which
is directly acted upon by the trigger into its lowerniost position. Projecting
upwards from and fitted into the rear end of the scar 18 is a spring 24, the
oscillation of which is limited by a part of the piece 18 as shown in Figure 4.
It is provided with a hook 25 capable of catching over the rear corner of the
sear 17 and acts by pulling down the same to release the hammer, when the
trigger engages the front end of the sear 18, the movement of which is stopped,
however, by the end striking against a stop 38. The hook 25 of the spring 24
is adapted to cutch over the sharp edge of the sear 17, when the forward end of
the sear 18 is out of engagement with the trigger. Moreover the spring 24 is
provided with an upward projecting part 27 adapted to be acted upon by the
stud 23 of the hammer, whereby the spring on the hammer being thrown to the
rear by the recoil will be forced backwards so as to allow the sear 17 to turn
up, and by means of the nose 22 prevent the hammer from being uncocked,
until the trigger is pulled. The upward turn of the scar 17 is limited by a
rib 36 projecting from the breech covering.
It will be seen from the above description, that the hammer will be cocked
automatically at each shot, and that the breech block after recoiling will fly
forwards once more. During this movement, the descending projection 29,
the rear part of which inclines upwards will engage behind the uppermost cart-
ridge in the magazine and force it into the lower chamber of the cylinder.
31 is the follower of the magazine 32 the cartridge lifter and 33 a spring act-
ing to raise the same.
From Figure 4 it will be seen, that the trigger will have to travel some dis-
tance before striking with its projection 34 the sear 18, and during this part of
the movement the cylinder is revolved. The trigger guard 35 is formed as is
shown in Figures 4 and 5 as a trigger spring.
At the discharge, the breech block will recoil to the rear as stated above,
and the extractor being in engagement with the flange of the cartridge will drag

page_text: the same along with it out of the chamber, and on the breech block arriving
in its extreme rearward position, the empty cartridge is ejected by striking with
the lower part of its flange against a stud on the breech casing (Figure 5). The
breech block then flies forward under the action of the two recoil springs, there-
by cocking the hammer. The projection 29 on the under side of the breech
block once more engages the uppermost cartridge in the magazine and forces it
into the lower chamber of the cylinder. Because of this arrangement the ham
mer when at full cock, will be in line with an empty chamber, so that any accur-
ing means are not required.
The trigger will only have to revolve the cylinder through half a turn at
each shot, which causes no considerable resistance. The loaded chamber being
then brought in line with the barrel, the projection 34 of the trigger will strike
the sear 18 and release the hammer thereby discharging the shot.
When the breech block has been thrown to the rear by the discharge of the
last cartridge from the magazine, a spring stop projecting from the latter,
which is normally forced aside by the cartridge, will act to prevent the forward
movement of the breech block, thus providing for the operator a warning appara-
tus. The breech block is not allowed to move forward, again, until the magazine
has been filled with new cartridges,
The quickloading of the magazine is effected through an aperture uppermost
in the left side of the stock or butt, said aperture being closed by the cover-
ing 13.
When the revolver is to be used as a single loader the magazine is locked;
a short pull at the trigger then causes a reduced revolution of the cylinder,
whereby the lower chamber is moved to the left so much as to allow another
cartridge to be put directly into the cylinder.
If the revolver be loaded and it is desired to uncock the hammer, this may
be effected by pressing on the lug 36, whereby the stud 23 of the hammer will
be released from the nose 22. If the hammer be desired to be cocked once more
this is effected by forcing the breech block to tue rear, until the stud 23 engages
behind the nose 22.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is:
-
An automatic revolver having a cylinder with two chambers, the lower one
of which communicates with a magazine provided within the butt, and the cart-
ridges being translated from the magazine into the chamber by means of a
projection formed on the under side of the breech block, said projection on the
forward movement of the breech block, which is thrown to the rear by the
recoil, engaging and taking along with it the uppermost cartridge in the maga-
zine, and the hammer being cocked at the same time whereas on the pulling of
previously turned
the trigger the lower and loaded chamber of the cylinder
upwards, after which the hammer is released, substantially as hereinbefore
described.
1.
Ol
at Natambor 1800