IMPROVEMENTS APPLICABLE TO STEAM BOILERS
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by John Jordan at the Office" of
the Commissioners of Patents, with his Petition, on the 14th April
1866.
S,
I; JOHN JORDAN,, of Liverpool, in the County of Lancaster, Engineer,, do
hereby declare the nature of my said Invention for "IMPROVEMENTS APPLICABLE
TO STEAM BOILERS," to be as follows (that is to say):
This Invention consists in applying what I call "chemises," or "chemisettes"
to the heating surface of the fire-boxes, flues, or tubes of steam boilers in such
a manner that there is a space formed between the "chemise" or "chemisette"
and that portion of the boiler to which it is applied.. The water in the boiler
has free access to the space before described, into which it flows through
suitable openings, and is then separated from the bulk of the water by the
"chemise" or chemisette.
In applying my Invention to, say, an ordinary vertical boiler I surround
the, fire-box and flue, which passes upwards through, the.. boiler with a
"chemise," which extends from or near the bottom of the boiler to or
a little above the surface of the water, and on applying heat to the boiler
the water filling the space between the heating surface and the "chemise
becomes heated and rises up to or above the top of the "chemise," and
falls over into the body of water in the boiler, thus disengaging the steam

page_text: at a high temperature and causing an effective circulation of the water in the
boiler, preventing deposit on the heating surface and causing it to fall outside
the "chemise" to the bottom, where it may be removed in the ordinary
manner.
The application of my Invention to the heating surfaces of (say) horizontal
boilers consists in applying the "chemise" or "chemisette," or both, which
may enclose or be enclosed wholly or partially by the heating surfaces in such
manner that any required space may be formed between such heating surfaces
and the "chemise™" or "chemisette" as will readily be understood. The
inlets and outlets to the spaces between the "chemises" or "chemisettes"
and the heating surfaces are so arranged that the water shall enter at the
parts least heated and passing onwards with increasing temperature and
velocity over the parts more heated is finally discharged at the outlet, which
I prefer to be some distance above the level of the surrounding water in the
¡boiler.
The "chemise" or "chemisette," or both, may be applied to boilers in which
the heating surfaces are both vertical and horizontal, or inclined at any angle,
or curved to any shape. I call my application to the heated and heating
surfaces of boilers a "chemise" when it completely surrounds or is surrounded
by the heated or heating surface to which it is applied, so as to isolate the
water in contact with the heating surface from the bulk of the water in the
boiler. And I call my application to the heated or heating surface of boilers
a "chemisette" when it does not completely surround or is not completely
surrounded by the heated or heating surface to which it is applied, but so as
to isolate the water in contact with the heating surface from the bulk of the
water in the boiler.
The "chemise" or "chemisette" may be applied in some cases for the
purpose of staying the surfaces requiring to be stayed, as in boilers where
high pressures are to be withstood, the circulation of the water being between
the surfaces so stayed together. The surfaces of the "chemises" or "chemi-
settes" may be either plain or corrugated or indented, and may be placed
with regard to the heating surface parallel to, or inclined to, or from, or concentric
with, or excentric from the heating surfaces, and the "chemises" or chemisettes
may be of any required thickness and of any kind of metal suitable to the
construction of boilers.