An Improved Steam Generator.
Year: 1893

page_text: Date of Application, 13th June, 1893
Complete Specification Left, 13th Mar., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
An Improved Steam Generator.
I, GEORGE A. CRANE, of No. 180 Luther Street, Cleveland, Ohio, U.S.A.,
Inventor, do hereby declare the nature of this invention to be as follows:-
This my invention relates to an improved steam generator in which great
efficiency is attained with a small consumption of fuel.
The
By my invention, I secure centrally within the outer shell of a boiler, a series of
tubular sections, each of which is dovetailed and makes a steam-tight joint with the
other when placed end to end. Two concentric rows of holes are made in each
section, one row being out of line vertically with the holes of the other row.
sections are held together by stay-bolts which connect plates at each end of the
highest and lowest section. Suitable bent tubes have one end secured in the upper
and the other end in the lower row of holes, which throws them at an angle to the
horizontal plane. The tubes extend to the inner surface of the outer shell.
By the arrangement of tubes herein before described a large heating surface is
provided and a continual circulation of water is kept up within the tubes.
Dated this 13th day of June 1893.
W. H. MUNNS,
Agent for Applicant.
An improved Steam Generator.
I, GEORGE A. CRANE, of 180 Luther Street, Cleveland, Ohio, U.S.A.,
Inventor, 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 :-
The object of this my invention is to provide a steam generator which is more
economical than those at present in use.
My invention may be described as follows; reference being had to the
accompanying drawings and to the letters and figures of reference marked thereon ;
like letters referring to similar parts throughout.
'
Fig. 1., is a vertical central section of a generator constructed according to my
invention: Fig. 2., is a plan thereof; the outside casing being removed.
Fig. 3., is a side elevation of one of the generator sections in which the
arrangement of the tubes is shewn :
Fig. 4., is a plan of the base section of the generator.
The base portion A has three tubular arms a, preferably formed integral
therewith, and three tubular supporting legs a'; the whole forming a tripod upon
which the structure rests. The legs a¹ have suitable flanges at their lower ends by
means of which the generator is bolted to its foundation. In each leg, and below
the grates is a "blow-off" outlet a² for removing any sediment or deposit that may
accumulate in the generator. By the construction herein shewn & described the
sediment will gravitate, to the bottom of the water space, and inasmuch as the
legs open into the bottom of the generator, the sediment will gravitate in the legs
below the boiling water point and below the place where it would be carried up
by the boiling water. By this arrangement the water is kept clear & free from
sediment.

page_text: any
The portion of the base A with which the arms a, are immediately connected,
forms the lowest section of the generator and is inclined at a³ to facilitate the fall of
sediment into the legs a'. By means of other sections B made of suitable
metal, a column is formed of any desired dimensions. These sections are preferably
cylindrical and rest one upon the other throughout the structure. Each section
has a rabbet formed upon its lower edge, and a flange b upon its upper edge; said
flange being adapted to engage in the rabbet of the section immediately above it.
Between these sections a copper or other suitable packing-ring is placed to prevent
leakage. The several sections are held together by bolts or rods C, which extend
through perforated lugs c on each section as shewn.
Each section has a series of holes; one series being above the other and parallel
to each other. In these holes tubes D are secured, and which are similar in shape
to a horse-shoe and having their ends fitted in the upper and lower series of holes
respectively. The arrangement of tubes is clearly shewn in Figs. 1 and 3. By
reference to Fig. 2. it will be seen that the tubes overlap, instead of one being
directly above the other. When viewed in side-elevation, the tubes run on spiral
or inclined directions. By this arrangement, all the tubes are exposed to the heat
and are not sheltered by each other.
A wall or casing E constructed around the generator encloses the heating space.
The casing may be of iron or masonry as desired.
If desired, the legs a' may be dispensed with and the generator be supported upon
a pedestal represented by broken lines in Fig. 1. The pedestal may have a suitable
man-hole or "blow-off" outlet to permit of the removal of sediment, as will be
readily understood.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
A steam generator consisting of a series of sections seated one upon the other;
each section having two concentric rows of holes; the holes in one row being out
of line vertically with the holes of the adjacent row; tubes, each having one end
secured in the upper and the other end in the lower row of holes of the same
section of the generator, said tubes arranged radially and out of line vertically,
thereby throwing each tube at an angle to the horizontal plane, all substantially as
and for the purposes herein before set forth.
Dated this 13th day of March 1894.
W. H. MUNNS,
55, Chancery Lane, W.C., Applicant's Agent.