Year: 1895

page_text: Date of Application, 19th Aug., 1895
Complete Specification Left, 15th May, 1896-Accepted, 20th June, 1896
I, ARTHUR GEORGE MUMFORD, of Culver Street Iron Works, Colchester, in
the County of Essex, Engineer, do hereby declare the nature of this invention to
be as follows :--
This invention relates to an improved construction of water tube boiler, and is
particularly applicable to the water tube boiler described in the Specification of
Letters Patent No 8729 of 1893.
The boiler may be of the well-known type, consisting essentially of a steam
collector, two water chambers, a series of tubes connecting the water tubes with
the steam collector and of one or more return tubes connecting the steam collector
with the water chamber.
The present invention has for its object to keep a definite and determined
quantity of water in the bottom of the steam collector.
One method of carrying my invention into effect consists in lengthening or
fitting a thimble or ferrule into the top end of the return tube or downcast in
such a manner as to project a certain distance above the bottom of the steam
collector, and so prevent the water from draining away and leaving the bottom
of the steam collector uncovered.
It will be understood the depth of water required on the bottom of the steam
collector will determine the height or length of the inwardly projecting portion of
the downcast.
Or in a modified arrangement the downcast may enter the steam collector at
the end or side thereof at any suitable height from the bottom instead of through
the bottom.
11
.
100-
I, ARTHUR GEORGE MUMFORD, of Culver Street Iron Works, Colchester, in
the County of Essex, 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 improved construction of water tube boiler, and is
particularly applicable to the water tube boiler described in the Specification of
Letters Patent No. 8729 of 1893.
The boiler may be of the well-known type, consisting essentially of a steam
collector, two water chambers, a series of tubes connecting the water tubes with
the steam collector and of one or more return tubes connecting the steam collector
with the water chamber.

page_text: The present invention has for its object to keep a definite and determined
quantity of water in the bottom of the steam collector.
I will now particularly describe my invention making reference to the accom-
panying drawings in which :-
:-
Figure 1 Sheet No. 1 is a view in end elevation-partly in section-of a boiler
fitted with one form of my invention.
Figure 2 Sheet No, 2 is a similar view showing modified arrangements, and
Figure 3 Sheet No. 2 is a broken view in side elevation--partly in section-of a
boiler fitted with another modification.
Throughout the views similar parts are marked with like letters of reference.
Referring to Figure 1, X designates the steam collector and X'X' the two
water chambers which are connected to the steam collector X by a series of
tubes not shown on the drawing-and a return tube or downcast A.
The top
end a of this return tube or downcast is lengthened or made to project a certain
distance above the bottom of the steam collector as shown so as to prevent the
water draining away and leaving the bottom of the steam collector uncovered.
In Figure 2. Sheet No. 2 the boiler is furnished with two return or down-
casts A, A the end a of the tube on the left hand side of the figure is lengthened
so as to project a certain distance into the collector as described with reference to
Figure 1. The upper part of the return tube or downcast A on the right band.
side of the figure is fitted with a projecting thimble or ferrule a¹ for the same
purpose as above described.
In Figure 3 Sheet No. 2 the return tube or downcast A is shown entering the
end of the steam collector A a certain distance above the bottom of the collector.'
It will be understood the depth of water required on the bottom of the steam
collector will determine the length or height of the inward projecting portion or
portions of the return tube or tubes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
(1.) The improvements in steam generators, substantially as hereinbefore
described and shown.
(2.) In a steam generator consisting essentially of a steam collector, two water
chambers, a series of tubes connecting the water chamber with the steam collector
and of one or more return tubes or downcasts connecting the steam collector
with the water chambers, lengthening, or otherwise making the top end of one
or both of the said return tubes within the steam collector in such a manner as
to prevent the water from draining away and leaving the bottom of said steam
collector uncovered.
Datel this 15th der of Nov 1202
i this 15th day of May 1206.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.