Improvements in Breech Loading Ordnance.
Year: 1899

page_text: Date of Application, 26th May, 1899
Complete Specification Left, 22nd Feb., 1900-Accepted, 24th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in Breech Loading Ordnance.
We, ARTHUR TREVOR DAWSON, Superintendent of Ordnance Works, and
GEORGE THOMAS BUCKHAM, Engineer, both of Messrs. Vickers, Sons & Maxim,
Limited, of No. 28, Victoria Street, Westminster, in the County of London, do
hereby declare the nature of this invention to be as follows:-
This invention relates to means of extracting the cartridge case from a breech
loading gun, the breech closing of which, is effected by an interrupted breech
screw.
For this purpose a bar is fitted to slide longitudinally between stops in one
of the interrupted parts of the female thread formed in the breech to receive
the breech screw.
The front end of the sliding bar has an upturned lip, which engages in front
of the flange of the cartridge case, a recess being formed in the gun to permit
this. At the rear of the sliding bar is formed a socket containing a vertical
spring latch which engages behind a projection on the rear face of the flange of
the breech screw.
A slanting gap, having a land in it, is formed in the flange of the breech screw
allowing it to swing clear of the latch when the unscrewing is completed, and
the breech screw is partly swung out of the gun.
A handle is formed on the rear-most part of the sliding bar.
When unscrewing the breech screw to open the breech, the sliding bar is
forced powerfully by the action of the screw a little to the rear, and by completing
the unscrewing the slanting gap is brought to face the latch of the sliding bar,
and the plug may now be swung out of the gun.
Owing to the slanting gap the sliding bar is further withdrawn until it receives
a "kick" occasioned by the land formed in the slanting gap, by continued
swinging out of the breech screw it eventually clears the latch whereupon the
cartridge case can be completely extracted by further withdrawing the sliding
bar by means of the handle.
When the cartridge case is pushed into the chamber of the gun the flange
engages with the lip on the sliding bar and carries it along with it into a recess
formed in the gun to receive it.
When closing the breech, should the vertical latch not be opposite the entrance
to the slanting gap in the flange of the breech screw, owing to the longitudinal
position of the sliding bar, then the flange of the breech screw will force the
latch down owing to the bevel on its rear face and allow the breech screw to
enter the gun.
Doted the oth
£1000
ABEL & IMRAY,
Agents for the Applicants.

page_text: Limited, of No. 28, Victoria Street, Westminster, in the County of London, 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 means of extracting the cartridge case from a breech
loading gun, the breech closing of which is effected by an interrupted breech
screw.
For this purpose we arrange an extractor, as we shall describe referring to
the accompanying drawings.
Fig. 1 is a part longitudinal section shewing the breech closed and the cart-
ridge in the gun, Fig. 2 is a similar section, the breech plug being removed and
the cartridge drawn back. Fig. 3 is an end view and Fig. 4 is a plan.
A bar a is fitted to slide longitudinally as far as permitted by a stop screw b
between guides in one of the interrupted parts of the female thread formed in the
breech to receive the breech plug
The front end of the sliding bar a has an upturned lip d which engages in
front of the flange e of the cartridge case, a recess being formed in the gun
to receive the lip d. At the rear end of the sliding bar there is fitted a vertically
sliding spring latch f which engages behind a projection g on the rear face of the
flange of the breech plug c. A slanting gap h having a land i in it, is formed
in the flange of the breech plug, this gap allowing it to swing clear of the latch f
when the unscrewing of the plug is completed, the plug being then partly swung
out of the breech. A handle is formed on the rear-most part of the sliding
bar a.
When the breech plug c is being unscrewed to open the breech the projection g
acting on the latch f causes the sliding bar to be forced powerfully a little to the
rear, moving back the cartridge, and when the unscrewing of the plug is com-
pleted the slanting gap his brought to face the latch f, so that the plug can be
swung quite out of the gun.
As the slanting gap h passes the latch f, the sliding bar receives a "kick" by
the action of the land i, by continued swinging out of the breech plug it even-
tually clears the latch f, whereupon the cartridge case can be completely extracted
by withdrawing the sliding bar by means of the handle k.
When the cartridge is pushed into the chamber of the gun the flange e of the
cartridges engages with the lip on the sliding bar and carries it along with it
into the recess formed in the gun to receive it.
When the breech is closed should the latch f not be opposite the front entrance
to the gap h, owing to the position longitudinally which the sliding bar a may
occupy then the flange of the breech plug acting on the slope of the latch, forces
it down and allows the breech plug to enter the gun.
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 :-
A cartridge extractor for a breech loading gun, arranged and operating in
combination with the breech plug, substantially as described.
Dated this 22nd day of February 1900.
ABEL & IMRAY,
Agents for the Applicants.