IMPROVE- MENTS IN OR RELATING TO BREECH LOADING ORDNANCE to be as follows
Year: 1884

page_text: I JOSIAH VAVASSEUR of the London Ordnance Works Southwark in the County
of Surrey Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN OR RELATING TO BREECH LOADING ORDNANCE to be as follows:-
"
This Invention has for its object improvements in or relating to breech loading
ordnance.
The improvements relate to the protection of the elastic pad of the obturator
known as the De Bange.
The canvas exterior of the pad gets cut through very quickly at the exterior
particularly at the front part.
}
I form the obturator with a thin metal casing instead of canvas employing as a
filling material either the present mixture of asbestos and mutton suet or other
suitable plastic material-or a liquid such as mercury.
CARPMAEL & Co.,
Agents for the Applicant.
"
I JOSIAH VAVASSEUR of the London Ordnance Works Southwark in the County
of Surrey Engineer do hereby declare the nature of my invention for "IMPROVE
MENTS IN OR RELATING TO BREECHLOADING ORDNANCE 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 or relating to breech loading

page_text: The improvements relate to the construction or protection of the elastic pad of
the obturator known as the De Bange.
The canvas exterior of the pad gets cut through very quickly at the exterior
particularly at the front part.
I form the pad of the obturator with a thin metal, casing instead of canvas
employing as a filling material either the present mixture of asbestos and mutton
suct or other suitable plastic material-or a liquid such as mercury.
Figure 1 shows an end view and Figure 2 a side elevation of an obturator fitted
with an elastic ring or pad constructed with a thin metal casing as above described.
The casing I form of two rings united together preferably at the points marked c. c.
The two parts of the metallic casing are first moulded approximately to form and
are then united together by solder or otherwise leaving openings through which
the material with which the casing is to be filled can be inserted. Preferably I use
as the filling material a mixture of asbestos and mutton suet such as commonly
employed in the manufacture of the elastic pads heretofore used. When the casing
has been filled with such filling material it is moulded to form and compressed by
heavy hydraulic pressure. The final closing of the case may be completed either
before or after submitting it to bydraulic pressure.
If in place of using a filling of asbestos and mutton suet or other such like
filling I use a liquid such as mercury I first make the casing of the form required
and afterwards fill it with liquid through a small hole left in it for the purpose
which hole can be subsequently closed when the casing has been filled.
In the drawings A is the metallic head of the obturator. Bits stem which passes
back through the centre of its breech piece to its rear end. C is the elastic pad
which is inserted between the head A and the front face of the breech piece as is
usual. D is a divided metallic ring interposed as is also usual between the head A
and the outer portion of the front face of the elastic pad-E is the outer casing of
the elastic pad.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. Enclosing the elastic pad of obturators used for making a tight joint at the
breech of breech loading ordnance within a casing of sheet metal substantially as
described.
2. The construction of the pads of obturators used for making a tight joint at
the breech of breech loading ordnance of a metallic casing filled with liquid
substantially as described.
3. The construction of the pads of obturators substantially as described and
illustrated in the drawings annexed.