Improvements in Water Heaters and Surface Condensers.
Year: 1899

page_text: Date of Application, 27th Apr., 1899
Complete Specification Left, 3rd Oct., 1899-Accepted, 25th Nov., 1899
Improvements in Water Heaters and Surface Condensers.
I, JOHN JEFFREYS, Heating Engineer, 11, Old Queen Street, Westminster, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in water heaters & surface condensers
substantially as set forth in the following description.
The heater or condenser consists of a metal cylindrical external or water
casing with removeable dished ends for cleaning out, bolted to angle rings and
fitted with outlets or standpipes for the attachment of circulating water con-
nections & mountings.
Within this casing is fitted an internal metal cylindrical riveted multitubular
steam drum leaving an annular space all round between it and the external cas-
ing, & having a number of metal tubes of any convenient diameter expanded into
the end plates of same. The ends of these tubes being open, the water con-
tained in the external or water casing is free to circulate through them as well
as through the annular space before referred to.
The steam service pipe to the internal drum is carried through the external
casing near the top and made water & steam tight by flanged or welded joints.
The steam drum is held in position within the water casing by this junction
and also by angle lugs, & bolts in slotted holes, to allow the drum to expand
freely when heated.
The action of the apparatus when used for heating water is as follows.
The water to be heated is contained within the water casing, and steam is
admitted through the junction previously referred to, into the interior of the
steam drum where it surrounds the external periphery of the tubes, and the
internal periphery of the drum, through which the heat is communicated to the
water. The condensed water formed in the steam drum is discharged by a pipe
or pipes passing through the water space and connected with a steam trap. This
pipe may also be made to answer the purpose of blow off pipe for washing out.
"When used as a condenser or feed water heater the action of the apparatus is
similar with the exception that the water may if desired be pumped into or
from the water casing.
The object of the invention is to secure
1st. A heater or condenser containing a maximum amount of heating surface
in a small space, in conjunction with perfect access to every tube, and also the
interior of the water casing for cleaning out and replacing tubes without dis-
connecting any of the service pipes.
2nd. Equal rate of expansion of the tubes & shell forming the steam drum,
which is attained by surrounding the whole with water which rises in tempera-
ture in the same ratio as that of the steam drum.
3rd. To obviate the necessity of large steam joint surfaces, the only joints of
this kind being those of the service pipes.
Thoth to f 41 1000

page_text: The object of the invention is to secure-
(1). A heater containing the maximum amount of heating surface in a small
space, in conjunction with perfect access to every tube and also to the interior
of the water casing, for cleaning out and replacing tubes, without disconnecting
any of the service pipes.
(2). Equal rate of expansion of the tubes and shell forming the steam drum,
which is attained by surrounding the whole with water, which rises in tem-
perature in the same ratio as the drum itself.
(3). To obviate the necessity of large steam joint surfaces, the only joints of
this kind being those of the service pipes.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what i
claim is:-
1. The combination of a casing to contain the water to be heated with a
multitubular steam drum or container suspended within the casing.
2. The combination of a casing to contain the water to be heated with a multi-
tubular steam drum or container suspended within the casing, and welded or
flanged and rivetted junctions for steam connections between the casing and
steam drum.
3. The combination with the subject matter of Claims 1 and 2 of removable
ends for cleaning out the water casing and tubes.
4. The combination with the subject matter of Claims 1 and 2 of the diaphragm
plate or plates fixed vertically or horizontally, as the case may be, within the
steam drum to give direction to the steam, and assist in the expulsion of air and
separation of grease where exhaust steam is used.
5. The combination with the subject matter of Claims 1 and 2 of lugs to sup-
port the steam drum and secure it to the casing, the lugs being made with slotted
holes to allow the steam drum to expand.
6. Water heaters and surface condensers substantially as described and illus-
trated in the drawings.
Dated this 92nd day of Santamhar 1890