Improvements in or connected with Water-tube Boilers.
Year: 1893

page_text: Date of Application, 23rd Jan., 1893-Accepted, 25th Feb., 1893
COMPLETE SPECIFICATION.
Improvements in or connected with Water-tube Boilers.
A communication by LAMBERT BERGMAN BATTIN, of Elizabeth, in the County of
Union and State of New Jersey, United States of America, Engineer, of The
Elizabethtown Water Company, of Elizabeth aforesaid.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Man-
chester, both in the County of Lancaster, and 323, High Holborn, in the County
of Middlesex, Civil 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 an improvement in boiler heads, in providing a frustum
shaped head or cover to the tubes of water-tube boilers, and providing in the end
thereof a manhole, or other suitable means of entrance, whereby access can be had
to the interior of the head, so that the boiler can be easily cleaned, or any part of
it can be removed or renewed with little difficulty.
The particular construction of the frustum shaped head will also more effectually
resist the internal pressure of steam boilers than where a flat or cylindrical head is
employed, and at the same time the large number of stay-bolts heretofore employed
in boilers of this kind can be dispensed with, as the frustum shaped head will serve
in lieu of such bolts.
This invention consists in novel features of construction hereinafter described and
claimed.
Referring to the accompanying drawing, which forms a part of this Specifi-
cation :-
Figure I represents a side elevation of one of the improved water-tube boilers;
Figure II represents a sectional view on the line 2, 2, Figure I; and
Figure III represents a detail view hereinafter referred to.
In this drawing-
A, represents one of a number of tubes of a water-tube boiler whose ends extend
through and are expanded over the tube sheets B. At C, is shown a frustum
shaped boiler head rivetted to the inbent flange 6 of the tube sheet, as shown in
Figure 3. These heads are provided at their outer ends with manholes D having
covers E. F is an asbestos packing lining between casings G and H. At J is
shown a fire box; at K, grate bars; and at L, the ash pit. The steam chamber
is shown at M and the steam outlet at N, the valve being shown at O. At P are
shown water introducing pipes. The steam chamber is connected by pipes m
with the heads.
It will be seen that, by means of the construction described, the particular form
of frustum shaped head will resist a more than ordinary interior pressure, and is
adapted to work more satisfactorily than the ordinary flat surfaces that are thrown
over boiler tubes. At the same time, this particular construction eliminates the
great number of stay-bolts heretofore employed for fastening the tube sheet to the
head. By dispensing with these stay-bolts, access can be had to the interior of
the tubes for repairs and cleaning much more readily than heretofore.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
The combination of a series of tubes, tube-sheets to which the tubes are secured,
having inbent flanges, frustum shaped heads secured to the inbent flanges having

page_text: suitable manholes and covers, a steam chamber and pipes by which the steam-
chamber is connected with the heads, substantially as described.
Dated this 21st day of January 1893
WM. P. THOMPSON & Co.,
Agents for the Applicant.