Improvements in Boilers for Hot Water Heating Apparatuses.
Year: 1893

page_text: Date of Application, 17th Mar., 1893
Complete Specification Left, 16th Dec., 1893-Accepted, 24th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Boilers for Hot Water Heating Apparatuses.
1, EDWARD WHITE ASTLE, of 3 Exeter Street, in the Town and County of
Derby, Hot Water Engineer do hereby declare the nature of this invention to be
as follows:-
My improved boiler is constructed in two parts, a slight vertical space or pocket
being left between the two halves to allow for the expansion and contraction of the
metal the two parts are bolted together with bolts according to the sizes made,
say from two bolts and upwards.
The space or pocket above mentioned is left open on the inside to allow for
expansion and contraction as already stated and is filled with cement or fire-clay on
the outside to seal it up.
The boiler rises from front to back in a sharp conical form and has a terminal
end and return the similar to the boiler described in Letters Patent granted to
Horatio Cade Simpson and myself and numbered 15861 of 1886.
The opening from the fire-box to the flue is a small circular or other conveniently
shaped flue which widens out into a broad oval shaped flue at the back end and upon
returning to the front end of the boiler the broad oval flue narrows sharply to
a small circular flue again before entering the chimney, this adds greatly to the
power and efficiency of the boiler.
I also effect an improvement by forming a slot between the return flue and the
front end of the fire box say about one third from the front end, the said slot to be
of any suitable dimensions and preferably tapering from the fire-box to the flue.
The fire burning brightly next the door, a great heat or flame enters the return Alue
through the slot in front of the smoke and unconsumed gas that passes from the
back end of the boiler a great portion of which will by this means be consumed
before it reaches the chimney.
I further effect an improvement by providing a water fire-bar of simple
construction. The framing for the bars may be in four pieces, the end frame
or head having say from six holes and upwards for tubes or fire-bars from one inch
bore according to the size of boiler made, the framing for the fire-bars when put
together answers as an ash-pan the said fire-bars or tubes being fixed with
bolts according to size.
The tubes may be of crucible steel, malleable, wrought or cast iron or copper each
one having a collar on each end which is faced and the joints being of light copper
rings, should there be any neglect regarding the water supply and the bars become
damaged they can be removed in a few minutes from the boiler by unscrewing the
two nuts, and each bar may be taken out singly by the same means and also these
bars can be attached to the flow and return pipes or they can be worked
independently of the boiler or pipes.
Dated this 16th day of March 1893.
W. SWINDELL,
Agent for the Applicant.

page_text: QUITIEM SITA INTATION.
Improvements in Boilers for Hot Water Heating Apparatuses.
1, EDWARD WHILE ASTLE of 3 Exeter Street, Derby in the County of Derby,
Hot Water 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 :—
In order that my invention may be the more readily understood I have caused
to be annexed to this Specification two sheets of drawings the different figures and
letter of reference marked upon which will be hereafter referred to.
Figure is a plan of my improved boiler through the return flue.
Figure 2 is a vertical longitudinal section of the same and Figure Bisa transverse
section of the same looking towards the time outlet and fire door.
The boiler rises from front to back in a conical form, less a terminal end and
return flue 3 similar to the boiler described in Letters Patent granted to
Hati Cab Simpson and myself and numbered 13stil of 1986; it is constincted
in fan put Band 6 a slight vertical space or purket D. being felt between the
two halves to allow for the expansion and contraction of the metal: the two parts
ane bolted together with bolts according to the sizes made from two bults and
upwards. The space or pocket D is left open on the inside to allow for expansion
and contraction as already stated and is filled with cement or five-clay on the
outside to seal it up.
The opening from the fire box E to the flue is a small circular or other
conveniently shaped opening which wilens out into a broad oval shaped the A
at the back end and upon returning to the front end of the boiler it narrows sharply
to a smaller circular or other conveniently shaped flue as at A before entering the
chimney, this adds greatly to the power and efficiency of the boiler.
I also effect an improvement by forming a slot G between the return thue and the
front end of the fire-box, the said slot to be of any suitable dimensions and
preferably tapering from the fire-box to the Rue in the form shewn on the
drawings and to vary in size according to the sizes of boilers male. The boiler
being in the conical form as shewn the fire always burns first at the front end of
the boiler next to the door so that a great heat or flame enters the return flue
through the slot ( in front of the smoke and unconsumed gas, by this means the
said smoke and unconsumed gas are ignited in the broad oval portion of the flue
and the heating power of the boiler is materially increased.
I further effect an improvement by providing a water fire-bar of simple con-
struction, the end frames I having a number of holes corresponding to the number
of water fire-bars or tubes 1 through each of which passes a rod J the whole being
drawn together by means of the nuts K. The tubes may be of crucible steel,
malleable, wrought or cast iron or copper, each one having a collar L on each end
which is faced, and the joints being of light copper rings M; the bars can thus he
removed in a few minutes by unscrewing the nuts K.
These water fire-bars or tubes may be connected with the upper boiler (which as
will be understood from the drawings is in two halves) or they may be connected
to the flow pipe P leading therefrom by unscrewing valve N and allowing the
water to pass upwards through pipe P, or they may be worked independently of
either of the two halves, which form the upper boiler, by shutting the valve N and
thus become an independent high pressure tubular boiler having its flow pipe O
and a return pipe (1 communicating with the tubular fire-bars at any suitable
point, thus when the valve N is closed a high pressure and low pressure boiler may
be heated with one fire or both worked as a low pressure boiler by unscrewing the
valve N between the high pressure and low pressure flow pipes O and P, or the

page_text: whole can be worked as three independent boilers, each half of the upper boiler
being worked separately if required.
Flow pipes Q, P and P2 and return pipes R and R' may be attached to any
convenient portion of each half of the upper boiler also a container S to couple
them together when desired from which any number of pipes S₁ may branch off
governed by valves T. The flow and return pipes for each half of the upper
boiler are shewn by dotted lines on Figure 3.
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 improved construction of boiler in sections with terminal end and return
flue widening out as shewn at A and narrowing again before entering the chimney
as shewn at A with slot G between return flue and fire box substantially as and
for the purposes described and illustrated.
2. The improved construction of water fire bar and high pressure boiler either
connected with or disconnected from the low pressure boiler or flow pipes
substantially as described and illustrated.
3. The improved method of heating and working three independent boilers with
one fire or working the said boilers in combination with each other substantially as
described and illustrated.
4. The whole substantially as and for the purposes described and illustrated.
Dated this 15th day of December 1893.
W. SWINDELL,
Agent for the Applicant.