Improvements in connection with Steam Boilers.
Year: 1899

page_text: Date of Application, 27th July, 1899-Accepted, 21st Oct., 1899
COMPLETE SPECIFICATION.
Improvements in connection with Steam Boilers.
I, WILHELM LUIS, of 11, Colnischestrasse, Cassel, Germany, 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 follow-
ing statement:-
My invention relates to improvements in connection with steam boilers, and
especially water-tube ones and is intended for use in facilitating the removal
of mud, scale, and other matters which may have collected in the tubes. The
covers heretofore applied to boilers require a considerable expenditure of labour,
time and packing material in removing and freshly packing them. Moreover,
in all such cases there is an amount of uncertainty as to whether the fresh pack-
ing will hold when the boiler is again put in use, and if only one of the packings
fail the boiler must be put out of work to rectify matters. All the above dis-
advantages are obviated by my invention which is put in practice in or in about
the following manner reference being had to the accompanying drawings in
which Fig. 1 is a front view of part of a tube plate and Fig. 2 a section
through A B Fig. 1, this section showing various forms of the covering devices
which are the subject matter of my invention. a are the covers and 6 the pack-
ings, all of which remain undisturbed when the boiler tubes are to be washed
out. This washing out is performed by a spray pipe e introduced into the boiler
or tubes. The pipe c can be inserted in more than one way. For instance the
cover a can have attached to it a tubular shank d outwardly screw-threaded and
closable after the pipe c is withdrawn, by the cap e, or by a screw plug.
Another mode of providing for the insertion of the pipe I sometimes employ
is to dispense with the shank d and to pass the pipe through the internally screw
threaded hole f which can be closed by a plug g. The hole may either be in
the centre or outside the centre of the cover a. In use the cap e or plug g as
the case may be is removed, the spray tube c inserted and after use withdrawn
and the cap or plug replaced. In order to prevent, during any of these opera-
tions, damage to the packing b a part of d may be "squared" as at h so that it
can be held by a key or spanner.
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. In covers for steam-boilers (and more especially for water tube boilers)
the provision of a suitably situated and closable opening for the insertion and
withdrawal as and when required of a spray pipe for clearing the boiler or tubes,
substantially as described in the above specification and exemplified in the accom-
panying drawings.
2. In covers for steam boilers (and more especially for water-tube boilers)
providing the said covers with a tubular shank for the insertion of a spray pipe,
the said shank having a screwed cap for closing the said cover when the spray

page_text: pipe is withdrawn, the whole substantially as described in the above specification
and exemplified in the accompanying drawings.
3. In covers for boilers (and particularly water-tube boilers) providing the
said covers with a central opening for the insertion of a spray pipe, the said
opening being closable with a screw-plug, substantially as described in the
above specification and exemplified by the accompanying drawings.
4. In covers for boilers (& particularly water tube boilers) providing the said
covers with an other than central opening for the insertion of a spray tube, the
Baid opening being closable with a cap or a screw plug, substantially as described
in the above specification and exemplified by the accompanying drawings.
Dated this 17th day of July 1899.
HUGHES & YOUNG,
23, Coleman Street, E.O., Agents.