Year: 1891

page_text: Date of Application, 13th Feb., 1891-Accepted, 4th Apr., 1891
8Të is a longitudinal section of the tube head for the same,
Figure 3 is a cross section through the boiler,
Figure 4 is a longitudinal section of a modified form of the boiler, and
Figure 5 is a longitudinal section of the tube head for the same, and
Figure 6 a cross section.
The improved water tube boiler consists of the upper chamber A. and of the tube.
head C divided by the partition B in which the circulation tubes consisting of one
inside the other are fixed.
The partition B is shewn of plates of venetian blind shape in Figures 1 and 2,
which leave an opening D, through which the steam formed in the circulating
water can escape upwards.
On the outer tubes F which are fixed in the plate E, the short tubes G which
are fixed to the partition B are fitted, these short tubes having an opening H below,
through which the water passes into the tubes J which pass through the tubes F
and are also provided with an opening below as shewn.
The openings H are provided with a flange, or sides, so that the water can only
enter the inner pipes J the outer ends of which are closed with stoppers K and
which at their other ends do not reach quite to the ends of the outer tubes F, so
that the water flowing into the tubes J through the openings H, goes at the back
into the tubes F, and at the front passes out into the tube head C, and the mixed
water and steam pass the bent plate L to the venetian blind shaped plates M,
below the water level, so that the steam generated passes through the openings
between the plates M into the steam space in the upper chamber A, whilst the
water is constantly driven back below the plates.
The feed water is pumped into the bottom of the upper chamber A, and passes
into the back part of the tube head C, so that only the plate E and the water
filled tubes F are exposed to the fire, whilst the front part of the tube head C,
which is intended for the steam is not exposed to the fire.
In the modifications shewn in Figures 4, 5, and 6, the partition B divides the
tube head C into two parts, of which the back one which is exposed to the fire com-
municates through the pipe N with the lower part of the upper chamber A which
is provided with a partition O the feed water Howing from this back part of the
chamber and through the openings H in the tubes J, whilst the mingled steam and
water pass from the tubes F into the front part of the tube head, and thence into
the upper chamber A.
By the arrangements described the evolution of the steam is promoted, and the
separation of the water rendered very easy.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed; I declare that what I
claim is :-
1. In water tube boilers, the arrangement of venetian blind shaped plates M
below the water level, in combination with the bent plate L which directs the
mingled water and steam flowing from the tube head C to the upper chamber A,
against the, plates M, so that the separation is effected, the steam passing through
the plates M, and the water being forced onward.
2. In water tube boilers the arrangement of a partition B, straight or venetian
blind shaped, in the tube head C, of which the back is exposed to the fire, whilst
the front or steam side does not come in contact with the fire, and the steam passing
through the tubes F and openings D into it passes to the upper chamber A, all
substantially as described and shewn in the drawing.
Dated thie 12th dow of February 1891
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.