Improvements in and relating to Steam Boilers.
Year: 1893

page_text: Date of Application, 24th Aug., 1893
Complete Specification Left, 4th May, 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Steam Boilers.
We, FREDERICK THOMAS RODWELL, of 16 East Street, Southampton, in the
County of Hampshire Boiler Maker and GEORGE DEER, of Halfway House,
Wareham, in the County of Dorset, Farm Bailiff, do hereby declare the nature of
this invention to be as follows:-
Our invention relates to marine steam boilers, more especially to the internal
longitudinal steel stays of same.
Our improved boiler stays are so constructed that they can be very readily
fitted in a boiler even when the space at ends of same is somewhat limited.
Steel longitudinal stays as now usually fitted in marine boilers are made in one
piece or length, thus it is often found very inconvenient and sometimes impossible
to renew these stays without removing the smoke boxes and beams, and cutting
bulkheads, and the like.
Instead of making steel longitudinal boiler stays in one length, we propose to
make them in two lengths, the joint being made at any convenient part of the
length, and for the purpose of firmly securing the two lengths together; we screw
thread the meeting ends of the stay, and provide a long ferrule, or nut, with a
female screw thread in same for its whole length; the two lengths forming a stay,
are connected together inside of the boiler by means of the aforesaid screw ferrule
into which the threaded ends of the two lengths are screwed until they butt at its
centre thus forming a complete stay of the total length required which can be
secured in place to the ends of boiler by nuts in the usual manner. We also
provide upon the threaded end of each stay-some distance back from the end-
an ordinary screw nut, and when a stay is secured in position these nuts are screwed
up close to the ends of ferrule making a tight joint, thus preventing steam or
water, getting at the screw threads within the ferrule and damaging them.
It is obvious that our invention is applicable to boiler stays of ordinary sizes and
that we can arrange for the diameters of the stays and ferrules and number of
threads per inch to be that best suited to the pitch of the stays and working
pressure of boiler.
Dated this 23rd day of August 1893.
HERBERT P. BLAKE, M.I.N.A.,
70, High Street, Southampton, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in and relating to Steam Boilers.
We, FREDERICK THOMAS RODWELL of 16 East Street, Southampton, in the
County of Hants, Boiler Maker, and GEORGE DEER, of Halfway House,
Wareham, in the County of Dorset Farm Bailiff, 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 :-
Our invention relates to marine steam boilers more especially to the internal
longitudinal, steel stays of same.
Our improved boiler stays are so constructed that they can be very readily fitted
in a boiler even when the space at ends of same is somewhat limited.

page_text: In the accompanying drawings :—
Fig. 1. is a part longitudinal elevation, of a boiler stay, constructed and fitted
according to our invention.
Fig. 2. is a plan view of the same partly in section.
Steel longitudinal stays, as now usually fitted in marine boilers, are made in one
length, thus it is often found very inconvenient and sometimes impossible to renew
these stays, without removing the smoke boxes, and beams and cutting bulkheads,
and the like.
When it is found inconvenient to fit longitudinal stays in one length in a boiler,
we propose to join two lengths of steel bars, in manner hereinafter described,
together forming a complete stay.
Like letters indicate corresponding parts throughout the accompanying drawings,
in which A, A', represents part of the ends of a boiler; B, B', the stay consisting
of two lengths, which may be of any desired diameter for the strength required,
the meeting ends of the two lengths are screw threaded. C, is a long ferrule or
nut with a female thread.
The two lengths B, B', are connected together and supported inside of the
boiler, by means of the nut C, the two inner ends of stay being screwed into the
nut until they butt at the centre of same, thus forming a complete stay of the total
length required, the opposite ends being secured at the ends A, A', of boiler by
nuts D, D, in the usual manner.
E, E, are ordinary screw nuts, which are screwed on the inner ends of the stays
before the latter are screwed into the nut C, and after a stay is secured in position
these nuts E, E, are screwed up close to the ends of the nut C, making tight
joints, thereby preventing steam or water getting into the screw threads within the
nut C, and rusting same.
We have shewn and described our improved stays to consist of only two lengths,
but it is obvious we may make them up of three or more lengths, if found more
convenient each length being connected together and supported where butted in
:similar manner as herein before described.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
.claim is
1st. The improved boiler stays made in two or more lengths of steel bar, and
connected and supported where butted by a screw ferrule or long screw nut C, all
constructed and combined substantially as described with reference to the
accompanying drawings, and operating as and for the purpose specified.
2nd. The combination with the ferrule C, of the nuts E, E, arranged substantially
as described for the purpose specified.