Improvements in Non-explosive Hot Water Circulating Boilers for Domestic and other Purposes.
Year: 1896

page_text: Date of Application, 18th Dec., 1896-Accepted, 20th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in Non-explosive Hot Water Circulating Boilers for
Domestic and other Purposes.
I, CHARLES BODDY, of 1, Osborne Street, Didsbury, in the County of
Lancaster, Builder, 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 that class of non-explosive boilers for domestic and
other purposes, wherein a closed high pressure boiler is employed inside an open or
low pressure boiler exposed to the kitchen fire and the water circulated through the
former is heated by that in the latter.
The object of my invention is to simplify and render the said type of boilers
universally applicable, more easy to fit or repair and more durable than those
hitherto in usc.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
: Fig. 1 is a longitudinal section, Fig. 2 a cross section, Fig. 3 a plan and Fig. 4
an end view. of my improved construction of kitchen boiler. Figs. 1, 5, 6, 7 & 8
are sectional views of some modifications thereof.
In carrying out my invention and referring to the figures generally a is the outer
or low pressure boiler and b the inner or high pressure boiler. The outer boiler a
I may provide with an overflow pipe (not shown) and with vent holes a¹ at the
back for the escape of steam as described in Specification belonging to Letters
Patent No. 11111 of 1896 granted to me. The outer boiler a may be supplied
with water by hand by forming in its top a² a loose lid a³ or the supply of water
may be effected automatically by means of a ball tap ex employed inside thereof
which obviates the necessity of a separate supply cistern and the front I form
with projections at which in connection with the drop bar dx form a rest for the
pans.
When employing a ball tap I form the top a¹ removable to fit loosely or be
secured by means of screws, so as to give ready access to the ball tap c when
needed.
The high pressure boiler 6 extends right through the low pressure boiler a and
may be arranged therein horizontally as shown in Figs. 1, 2, 3, 4, 5 & 8, vertically
as shown in Fig. 6, or diagonally as shown in Fig. 7, or be cast with the low pressure
boiler a as shown in Fig. 1. When arranging it separate from the boiler a I form
each end with a flange 61, 61, adapted to bear against annular recesses 63, 63, formed
respectively in the walls or top and bottom of the low pressure boiler a as the case
may be.
The ends of the high pressure boiler I close by means of plugs c c', which fit
direct into the said annular recesses or against the said flanges as the case may be,
and are secured to the high pressure boiler b by means of a bolt c. One of the
said plugs, say c¹, is formed with a water inlet and outlet d, d', respectively into
which are screwed the circulating pipes e, e¹, leading to the cylinder (not shown).
As will be readily seen from Fig. 4, that by turning the plug c', the inlet and
outlet d, d', thereon can be set in any position convenient for connection with the
circulating pipes e, e¹.

page_text: In lieu of screwing the latter into the said inlets they may be secured directly to
the plug o' as shown in Figs. 6 & 7, and the inlet piped project a suitable distance
into the high pressure boiler b.
The latter I form of any suitable metal and may be of any suitable section
preferably round whilst the inner sides of the plug c, c¹ I face with copper or other
suitable metal to prevent corrosion.
I wish it to be understood that I do not confine myself to the section or position
of the high pressure boiler 6 or shape of the low pressure boiler a shown in
Figs. 1, 3, 4 & 6, as the same may be varied without departing from the nature of
my invention, for instance I may form the bottom of the low pressure boiler a semi-
circular or of similar shape, which provides a greater heating surface and causes
the flame to more readily impinge upon the same.
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―
1st. In hot water circulating boilers for domestic and other purposes of the type
hereinbefore referred to, a high pressure boiler b the ends of which are socketed in
or cast with the walls, or top and bottom of the low pressure boiler a respectively,
all substantially as and for the purpose set forth.
2nd. In combination with the high pressure boiler, specified in the preceding
claim, plugs c, c¹, one of which serves for the reception of the circulating
pipes e, e¹, and is capable of rotary adjustment, all substantially as set forth.
3rd. In a boiler of the type specified in the preceding claims, a ball tap valve c*
employed inside the low pressure boiler a, all substantially as and for the purpose
set forth.
4th. The general construction and combination of parts constituting my
improvements operating substantially as and for the purpose set forth.
Dated this 17th day of December 1896
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.