IMPROVEMENTS IN STEAM BOILERS OR GENERATORS
Year: 1882

page_text: LETTERS PATENT to John Imray of No. 28 Southampton Buildings Chancery
Lane in the County of Middlesex for an Invention of IMPROVEMENTS IN
STEAM BOILERS OR GENERATORS Communicated to him from abroad by
Claus Heinrich Ferdinand Russmann of Hamburg in the German Empire.
PROVISIONAL SPECIFICATION left by the said Jolin Imray at the Office of
the Commissioners of Patents on the 14th August 1882.
"
JOHN IMRAY of No. 28 Southampton Buildings. Chancery Lane in the County
of Middlesex "IMPROVEMENTS IN STEAM BOILERS OR GENERATORS [Commu-
nicated to him from abroad by Claus Heinrich Ferdinand Russmann of Hamburg
in the German Empire]
This invention relates to a construction and arrangement of steam boiler or
generator consisting of a number of sets of pipes, each set forming a section of the
generator which can be cut off from the rest when required and all the sets when
the boiler is in use, having common water and steam connections and being
enclosed within a fire box. Each section consists of a pipe which begins from an
external valve box situated below the fire door extends backwards within the fire-
box sloping a little upwards, then zigzags several times always maintaining an
upward slope, and finally comes out at the upper part of the firebox to an external
valve box. A Dumber of these pipes are placed side by side in the fire box, all of
them connected to the valve box below and also to the valve box above, their lower
limbs forming the firegrate and their zigzag upper limbs being exposed to the
heat of the products of combustion within the firebox which is lined with
refractory material and has a chimney at the top. In order to accommodate the
mouths of the pipes in the valve boxes and to give better passage for the products
of combustion among their zigzags the pipes are placed alternately at somewhat
different levels. Within each of the valve boxes facing the mouth of each pipe is
fitted the plug of a stopcock governing ports to two passages one above the
mouths of the pipes and one below, either or both of which can be shut off from
any pipe by turning the plug belonging to that pipe. The upper passage of the

page_text: Jower valve box serves for supply of feed water to the pipes, the upper passage of
the upper valve box receives the steam from the pipes, the lower passage in each
case can be used as a blow out passage for clearing out sediment.
From the upper
passage of the upper valve box there are branches one for each pair of pipes some
of which can be used for connecting steam pipes, safety valves, pressure or tempera-
ture gauges, the others being plugged. A pipe connects the feed passage of the
lower valve box to the steam passage of the upper valve box, this pipe having near
its upper end a check valve to prevent water from rising to the steam passage, and
a safety valve.
About the middle of this pipe is connected to it a water-gauge
and a cock is provided governing two ports the one to the upper and the other to
the lower part of the pipe, so that by turning the cock in the one way or the other,
either steam or water can be blown out, or issue of both can be stopped.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Inray in the Great Seal Patent Office on the 7th February
1883.
"
JOHN IMRAY of N° 28 Southampton Buildings, Chancery Lane in the County
of 'Middlesex "IMPROVEMENTS IN STEAM BOILERS OR GENERATORS A commu-
nication to me from abroad by Claus Heinrich Ferdinand Russman of Hamburg
in the German Empire.
This invention relates to a construction and arrangement of steam boiler or
generator consisting of a number of sets of pipes, each set forming a section of the
generator which can be cut off from the rest when required, and all the sets when
the the boiler is in use, having common water and steam connections and being
enclosed within a fire box. Each section consists of a pipe which begins from an
external valve box situated below the fire door, extends backwards within the fire
box sloping a little upwards, then zig-zags several times always maintaining an
upward slope, and finally comes out at the upper part of the fire box to an external
valve box. A number of these pipes are placed side by side in the fire box, all of
them connected to the valve box below and also to the valve box above, their lower
limbs forming the firegrate and their zig-zag upper limbs being exposed to the heat
of the products of combustion within the fire box, which is lined with refractory
material and has a chimney at the top. In order to accommodate the mouths of
the pipes in the valve boxes and to give better passage for the products of combus-
tion among their zig-zags, the pipes are placed alternately at somewhat different
levels. Within each of the valve boxes facing the mouth of each pipe is fitted the
plug of a stopcock governing ports to two passages one above the mouths of the
pipes and one below, either or both of which can be shut off from any pipe by
turning the plug belonging to that pipe. The upper passage of the lower valve
box serves for supply of feed water to the pipes, the upper passage of the upper
valve box receives the steam from the pipes, the lower passage in each case can be
used as a blow out passage for clearing out sediment. From the upper passage of
the upper valve box there are branches one for each pair of pipes, some of which
can be used for connecting steam pipes, safety valves, pressure or temperature
gauges, the others being plugged. A pipe connects the feed passage of the lower
valve box to the steam passage of the upper valve box, this pipe having near its
upper end a check valve to prevent water from rising to the steam passage, and a
safety valve. About the middle of this pipe is connected to it a water-gauge and
a cock is provided governing two ports, the one to the upper and the other to the
lower part of the pipe, so that by turning the cock in the one way or the other,
either steam or water can be blown out, or issue of both can be stopped.
DESCRIPTION OF THE DRAWINGS
Fig. 1 is an external side view partly in section, Fig. 2 is a front view partly in
section, Fig. 3 is a longitudinal section and Fig. 4 is a sectional plan of a steam
boiler or generator according to this invention. The lower limbs a, b, of the zig-
zag pipes a b c &c form the firegrate on which fuel is fed through the fire door S.
The products of combustion rise through the interstices of the upper zig-zags and
pass away by the chimney T. In order to give more free passage to the products
of combustion and the better to accommodate the fittings in the valve boxes H H',
the alternate pipes b, d &c and their zig-zags are at a level higher than the inter-
mediate pipes a c &c. The upper valve box H to which all the upper limbs of

page_text: number of branches & some of which may be plugged, and some employed for
leading away steam, or communicating with pressure gauges or safety valves; it
has also a lower passage o¹, and between the two passages are situated the cocks i,
one for each of the zig-zags pipes. The plug of each of these cocks is made with
passages so that the pipe which it governs can be closed, or can be put in commu-
nication with either o or o¹ or with a transverse passage m. The lower valve
box H¹ is of the same construction, having corresponding passages o² and o³ and
connections and cocks i for the lower limbs of the zig-zag pipes ab &c. A pipe R
connects the passages o and o², the lower limb r serves as the feed pipe. The
upper part of the pipe leads by a passage D to a valve box in which is a check
valves covering a passage e to the channel o of the upper valve box H. A spring
valye allows escape of water or steam when the pressure exceeds the force to
which the spring is adjusted. A cock g can be used for blowing off either steam
or water by the outlet x, the lower channels o' and o³ of the valve boxes H H' can
also be used for blowing out from the pipe of any section by turning the cock i
belonging to that section. A glass gauge 2 is fixed at the side of the pipe R.
Having thus described the nature of the said invention and in what manner the
same is to be performed as communicated to me by my foreign correspondent, I
claim:
First. The combination of the zig-zag pipes a b c &c of a sectional steam boiler
or generator with the valve boxes H H provided with cocks i whereby the several
sections can be made to act in connection with each other, or any one or more
sections can be disconnected, substantially as herein described.
Second. In combination with the valve boxes H H¹ the pipe R with its feed
branch and the passages D and e and valves s and l, substantially as and for
the purposes herein described.
Third. The arrangement of the lower limbs of the pipes a b c &c in relation to
the fire door and ashpit so as to act as the firegrate, substantially as herein
des ribed.
In Witness whereof, I the said John Imray have hereunto set my hand and
seal this Seventh day of February in the year of our Lord One thousand
eight hundred and eighty three.
JOHN IMRAY
(L.S.)