Improvements in Kitchen Boilers and in Apparatus connected therewith for Heating Water.
Year: 1891

page_text: Date of Application, 20th June, 1891
Complete Specification Left, 19th Mar., 1892-Accepted, 18th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Kitchen Boilers and in Apparatus connected
therewith for Heating Water.
JAMES WALKER 39 West Derby Street Liverpool in the County of Lancaster,
Plumber, do hereby declare the nature of this invention to be as follows:-
It consists of a boiler fitted with an inner chamber; the hot water circulation is
carried on through the inner chamber only; which has an action independent of
outer boiler or chamber.
The space which surrounds the inner chamber is supplied with water from a
separate cistern fixed for that purpose only.
There are two steam pipes or exhaust pipes in connection with the inner
chamber one always open the other automatic, the latter opening when required.
There are two steam pipes connected to the outer chamber also a tap fixed to
indicate at all times the quantity of water contained therein.
JAMES WALKER.
COMPLETE SPECIFICATION.
Improvements in Kitchen Boilers and in Apparatus connected
therewith for Heating Water.
I JAMES WALKER of 39 West Derby Street Liverpool in the County of
Lancaster, Plumber, 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 is to so construct and fit kitchen boilers that a good supply of hot
water is obtained for baths and domestic uses without danger of explosion if any or
all of the connecting pipes become blocked by ice or otherwise.
The invention consists essentially in providing any usual or. suitable kitchen
boiler fitted as hereinafter set forth with an inner chamber, when the inner
chamber is fitted with two pipes, one of which leads from near the bottom of the
said chamber to the usual supply cistern placed in any convenient or usual position
near the roof of the house, whilst the other commences near the top of the said
chamber and is open to the atmosphere at a higher level than the supply cistern.
Taps for drawing off cold water communicate with the pipe leading to the supply
cistern, or with any suitable cold water supply pipe, and taps for hot water supply
are in communication with the pipe opening to the atmosphere. The usual hot
water cylinder is advantageously incorporated with the said pipes, as shown in
drawing.
The kitchen boiler is connected by a pipe to a separate cistern provided with a
ball or float valve and fixed at such a height as to maintain the said kitchen boiler
nearly full of water and the said cistern is supplied with heated water through the
ball or float valve by means of a pipe connected to the pipe which leads from
the inner chamber to the atmosphere. One or more, preferably two, open ended

page_text: pipes rise from the top of the kitchen boiler to convenient height to allow of the
escape of steam from the said boiler and a pipe leads from just below the water
level in the said boiler to the usual tap so as to prevent water from being drawn
off' below the desired level.
The drawing hereunto annexed illustrates what I consider to be the most
approved method of carrying my invention into effect. a is a kitchen boiler of any
usual construction fixed in any suitable manner. b is the inner chamber preferably
of copper secured to the top of the said boiler by means of a lid c.
dis a pipe
which leads from near the bottom of the said chamber to a cylinder e, and is
continued at to the usual supply cistern, the cold water draw off taps being con-
nected to dat convenient places. is a pipe which leads from the top of the
chamber to the cylinder e and is thence continued at ¹ to the atmosphere above
the level of the supply cistern. The hot water taps are connected to f¹. If a
cylinder be not used the pipes would continue as shown by the dotted lines. The
boiler a is connected by a pipe g to a cistern / fitted with a ball or float valve i,
and a pipe connects the valve with the hot water pipe f. kare steam escape
pipes opening from the top of the boiler a to the atmosphere. Z is a pipe and tap
from which water can be drawn off from the kitchen boiler a.
It will be evident that no explosion can take place in the boiler a as it is in frec
communication with the atmosphere, & that if the pipes & f¹ become blocked as
they frequently are in the upper part of house generally near stove cistern where
..exposed to frost; there is no possibility of explosion taking place in the inner
chamber because, the water therein cannot be raised to boiling point until the
boiler a is completely empty, & as its contents cannot be drawn off by any tap it
will be seen that it can only be emptied by continued ebullition.
..
Assuming that this is the case & the boiler a is empty, there is still no possibility
of explosion, for should the inner chamber b be raised to boiling point there would
be now a free outlet from same through pipes,j, & small cistern having run dry,
the open ball valve gives free communication to the atmosphere.
It will be seen that in cases of long continued frost the back boiler a can be
conveniently filled by hand through small cistern h the indicating tap & pipe !
always shows when this is required, consequently the fire can be kept up through
all kinds of weather.
Having now described & ascertained the nature of my said invention & in what
manner the same is to be performed I would have it understood that the use of a
kitchen boiler with an internal chamber has been previously proposed and that I
am aware of the Specification of Smith's Letters Patent No. 520 of 1875, and of
the Specification of MacKenzie's Letters Patent No. 7776 of 1891, and that I lay no
claim to anything described and claimed in the said Specifications but I declare
what I claim is:
Kitchen boilers open to the atmosphere provided with an inner chamber, con-
necting pipes, supply cisterns & draw off taps substantially as set forth.
Dated the 18th day of March 1892.
JAMES WALKER.