Year: 1888

page_text: I, CHARLES ALBERT KNIGHT of 107 Hope Street, Glasgow in the County of Lanark,
Scotland, Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by the
following statement :—
This invention relates to the class of feed water heaters (which are also applicable as
condensers) described in the Specification of Letters Patent Number 7622 of 1887;
and the present improvements have for their objects to make better provision for
obtaining access to the interior of the apparatus for cleaning and to freely permit
of elongation and contraction of the tubes and other parts under variations of
temperature.
The improved feed water heater is illustrated in the accompanying drawings under
one modification in which the shell of the apparatus is composed of cast metal in
elevation, vertical section and horizontal section at figures 1, 2 and 3 and under
another modification in which the shell is constructed of wrought metal in corre-
sponding views at figures 4, 5 and 6. The apparatus comprises the usual upper and
lower chambers A and B connected by a series of tubes C through which the feed
water flows, and a cylindrical or other shell D surrounding said tubes and through
which passes the exhaust steam or other fluid whose waste heat is to be communicated
to the water flowing through the tubes, the water and steam entering and passing
out by the usual inlet and outlet pipe connections. When the shell D is composed
of cast metal it is made a shown in figures 1, 2 and 3 in two parts being divided
vertically and formed with flanges d where the parts are bolted together. At the
lower end the shell D is bolted to the tube plate B₁ constituting the crown of the
chamber B but at the upper end, which is or may be flared as shown, the shell instead
of being connected to the base of the chamber A as usual has bolted over it an
annular cap or flanged ring E and in a groove or recess formed between said ring
and the upper end of the shell D is fitted a packing ring F of vulcanised rubber or
other elastic material which bears at a on the outer periphery of the flanged base of
the chamber A and constitutes a tight roller packing between said chamber and the
shell D which permits of free elongation and contraction of the tubes C and shell D

page_text: relatively to each other. To obtain access to the tubes C for cleaning, the ring E is
removed the bolts of the vertical flanges d as well as those in the bottom flange
unscrewed and the two parts of the shell D separated. This construction of the shell
may also be effected in wrought metal.
In the modification represented at figures 4, 5, and 6 the shell D is made in one
piece or of plates rivetted together and in order that it may be removed bodily to
give access to the tubes C it is made of greater diameter throughout than the upper
chamber A. Its lower end has rivetted to it a cast or angle iron flange D¹ by which
it is secured to the chamber B and on its upper end is rivetted a similar flange D²
over which is fitted the annular cap or flanged ring E which in conjunction with the
flange D² serves to retain the packing ring F which bears on the flanged periphery
of the chamber A the action of said packing ring being the same as in the modifica-
tion first described.
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. A feed water heater or condenser constructed substantially as hereinbefore
described with reference to figures 1, 2 and 3 of the annexed drawings.
2. A feed water heater or condenser constructed substantially as hereinbefore
described with reference to figures 4, 5, and 6 of the annexed drawings.
3. In a feed water heater or condenser the arrangement of the packing ring (E)
interposed between the shell and the periphery of the tube plate or water chamber
substantially as and for the purpose' set forth.
Dated this Eighteenth day of September 1888.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.