IMPROVEMENTS IN PISTONS
Year: 1884

page_text: I JAMES AMBLER 13 West Parade Spring Bank Hull Yorkshire Engine Fitter
do hereby declare the nature of my invention for IMPROVEMENTS IN PISTONS to be
as follows:
The Metallic Ring is in two or more sections and is concave in form, the edges
of which lap over the internal Junk Ring see A. Fig 1. The sections are joined
together by T tongue peices let into the internal edges of the Metallic Ring see A
Fig 2.
These Tongues serve to prevent the steam passing through the piston at the
openings of the Metallic Ring, and the T ends check the undue pressure of the ring
against the sides of the Cylinder.
The Junk Ring is placed inside the Metallic Ring and composed of two parts,
one of which is bolted to the body of the piston see B Fig 1. and the lower part B
is bolted to the upper one by smaller bolts, to allow of lining up when worn.
When Junk Ring is detached from the body of the Piston, both Metallic, and Junk,
Rings can be lifted out together for the purpose of adjustment.

page_text: COMPLETE SPECIFICATION. .
I, JAMES AMBLER, 13 West Parade, Spring Bank, Hull, Yorkshire, Engine Fitter,
do hereby declaro the nature of my invention for IMPROVEMENTS IN PISTONS, and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The Metallic Ring is made of any required strength, in two or more sections, and 5
is concave in form, the edges of which lap over the internal Junk Ring; see A fig 1.
The sections are joined together by T tongue pieces, see A fig 2. let into the body
and inside of the edges of the Metallic Ring, and the part of the tongue next to the
Junk Ring, is flattened to fit upon it see D. fig 1. These tongues serve to prevent
the steam passing through at the openings of the Metallic Ring, and the T ends 1
check any undue pressure of the Ring against the sides of the Cylinder.
The Junk Ring is placed inside of the Metallic Ring, and is composed of two
parts; see B. C. fig 1. one of which is bolted to the body of the piston see fig 1. B
and the lower part C fig 1. is bolted to the upper one by smaller bolts, the heads of
which are recessed into the upper part, and thus lie level under the edges of the 1
Metallic Ring. When the Junk Ring is detached from the body of the piston, it
can be lifted out along with the Metallic Ring both coming out together. In
Engines however, where the piston rod can be easily lifted out, the upper part of
the Junk Ring can be cast on, and form part of the body of the piston.
If Cylinders are in bad condition when this piston is first adopted, I recommend 2
that springs be temporally used, to assist the ring in bringing them into a proper
state, for which provision is made by a groove in the lower part of the Junk Ring
see E fig 1.
Having now particularly described and ascertained the nature of my said
invention and what manner the same is to be performed I declare that what 2
I claim, is
1 That the Metallic Ring being on the outside gives the maximum of available
rubbing surfare.
2 The pressure of the steam being directly upon the Metallic Ring, where the
rubbing friction is, the Metallic Ring is also kept to the face of the Cylinder 3
without the aid of springs.
3 The Tongue pieces being let into the body and inside of the edges of the
Metallic Ring with the T ends to restain any undue pressure when the Metallic
Ring is in the widest part of the Cylinder.
4 The placing of the Junk Ring inside the Metallic Ring, and forming it of upper
and lower parts.
Dated this the twenty first day of January eighteen hundred and eighty five.