An Improvement in Firing Mechanism for Breech Loading Ordnance.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
An Improvement in Firing Mechanism for 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. 32, Victoria Street, Westminster in the County of London do hereby declare
the nature of this invention to be as follows:-
Our invention relates to firing mechanism of breech loading ordnance and con-
sists in a device whereby the primer is prevented from being jerked out, by the
shock of closing the breech.
This device is applicable particularly to firing mechanisms such as are described
in Specifications No. 10606 of 1896, No. 26,251 of 1896, No. 26,253 of 1896.
For this purpose, we fit above the primer extractor a retainer consisting of a
flat spring having its front end fixed and its rear end free, but urged downwards
by the spring towards the primer. The free end is formed with a head having a
flange projecting downwards behind the primer, and an inclined projection or
flange on either or on each side of the head, in the path of the arm or arms of
the extractor.
The action is as follows:-
In the act of inserting a primer, its head encounters the arm of the extractor,
and moves it on its pivot upwards and forwards. As the primer is advanced, the
extractor arm acting on the incline on the head of the retainer pushes up the head
of the retainer so that the downwardly projecting flange is raised out of the way
of the head of the primer, allowing it free passage as the primer is inserted.
When the primer is pushed home the extractor arm is clear of the head of the
retainer which descends bringing its flange down behind the head of the primer
and preventing it from being jerked out when the breech is closed, however
violently.
When the breech is opened the arm of the extractor again engages the incline
on the head of the retainer and lifts it with its flange leaving a clear passage
for the primer to be ejected.
Dal 10. Ja Dasambon 1000
ABEL & IMRAY,
Agents for the Applicants.
An Improvement in Firing Mechanism for 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. 32, Victoria Street, Westminster in the County of London do hereby declare
[Price 8d.1

page_text: 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:-
Our invention relates to firing mechanism of breech loading ordnance and con-
sists in a device whereby the primer is prevented from being jerked out, by the
shock of closing the breech.
This device is applicable particularly to firing mechanisms such as are described
in Specifications No. 10606 of 1896, No. 26,251 of 1896, No. 26,253 of 1896.
For the purpose above set forth, we fit above the primer extractor a retainer
consisting of a flat spring having its front end fixed and its rear end free, but
urged downwards by the spring towards the primer. The free end is formed with
a head having a flange projecting downwards behind the primer, and an inclined
projection or flange on either or on each side of the head, in the path of the
extractor.
Fig. 1 of the accompanying drawings is a section of part of the breech of a gun
fitted with a retainer according to this invention, Fig. 2 is a plan and Fig. 3
is an end view of the retainer.
Fig. 4 is a section of part of the breech of a gun fitted with a retainer some-
what modified in form, of which Fig. 5 is a plan. Fig. 6 is a front view of the
forked extractor employed.
is the primer and e the extractor of the usual form and worked in the usual
way by the vertical slide which carries the firing mechanism. The retainer.
according to this invention, consists of an elastic part a being a somewhat stiff
blade spring, two laterally projecting inclined flanges bb, and a downwardly pro-
jecting flange c. This retainer is fixed at its front end by a screw its spring
urging it downwards as low as permitted by the recess of the breech in which it
is accommodated.
The action is as follows:-
In the act of inserting the primer, its head encounters the arms of the
extractor e and moves the extractor on its pivot upwards and forwards.
As the primer is advanced, the extractor arms acting on the inclined
flanges of the retainer push up the head of the retainer
the downwardly projecting flange
SO that
C is raised out of the way of the
head of the primer, allowing it free passage as the primer is inserted. When
the primer is pushed home the extractor arms are clear of the side flanges of
the retainer which descends bringing its middle flange c down behind the head h
of the primer and preventing it from being jerked out when the breech is closed,
however violently.
When the breech is opened the arms of the extractor again engage the inclined
flanges on the head of the retainer and lift it with its flange c leaving a clear
passage for the primer to be ejected.
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:-
In combination with the breech and extractor of a breech loading gun a spring
retainer arranged and operating substantially as described.
Dated this 29th day of August 1900.
ABEL & IMRAY,
Agents for the Applicants.