Improvements in the Utilization of Waste Heat for the Production of Motive Power
Year: 1897

page_text: Date of Application, 12th Feb., 1897
Complete Specification Left, 12th Nov., 1897-Accepted, 18th Dec.,
1897
PROVISIONAL SPECIFICATION.
"Improvements in the Utilization of Waste Heat for the Production
of Motive Power."
I, HUGH MANSFIELD ROBINSON L.L.D., of 3, Harcourt Buildings, Temple, in
the City of London, Solicitor, do hereby declare the nature of this invention to be
as follows:-
My invention has for its object to utilize the heat of gas flames and preferably
the waste heat of flames used for lighting purposes for generating steam for
driving small motors for domestic or other purposes.
In carrying out my invention I arrange a heating coil over the flame the heat
of which is to be utilized the said coil being surrounded by non-conducting hoods
as described in the specification of former Letters Patent granted to me
No 19695 of 1895.
One end of this coil is connected to a water supply pipe whilst the other end is
connected to a steam receiver or to the cylinder of the motor or the like to be
driven.
In the operation of the apparatus the water flows up the pipe into the heating
coil at such a regulated speed that before it reaches the top of the coil it is con-
verted into steam which steam then flows to the receiver or the like
An automatic check valve is placed in the water supply pipe to prevent the
water from being forced back in the same by the steam pressure.
In practice the said valve pulsates, that is to say, it opens to pass water and
when sufficient steam pressure is generated it closes and remains closed until the
steam escapes or is utilized, when the check valve again opens under the water
pressure and so on.
In order to obtain a very rapid vapourization of the water I find it advantageous
to employ a second or double coil to afford a large heating surface.
When the steam is not being utilized for motive power purpose it may be used
for heating the water in a tank through which the feed water flows; in this case
I may employ an arrangement of valves similar to that described in my Patent
before referred to.
The exhaust steam from the engine when at work may be passed through a
coil in the said tank to heat the feed water..
350
A
.
1
1007
"
Improvements in the Utilization of Waste Heat for the Production
of Motive Power."
I, HUGH MANSFIELD ROBINSON L.L.D., of 3, Harcourt Buildings, Temple, in
the City of London, Solicitor, do hereby declare the nature of this invention and
011

page_text: in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My invention has for its object to utilize the heat of gas flames and preferably
the waste heat of flames used for lighting purposes for generating steam for
driving small motors for domestic or other purposes.
In carrying out my invention I arrange a heating coil over the flame the heat
of which is to be utilized the said coil being surrounded by non-conducting hoods
as described in the specification of former Letters Patent granted to me
No. 19695 of 1895.
One end of this coil is connected to a water supply pipe, containing a water
pressure reducing valve, whilst the other end is connected to a steam receiver or
to the cylinder of the motor or the like to be driven.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which:-
Figure 1 is a diagrammatic view illustrating my invention; and,
Figure 2 is a sectional view illustrating a slight modification.
a is a lamp or lantern, the heat from the flame in which is to be utilized. b is
the heating coil arranged above the said burner and one end c of which is in com-
munication with a water supply pipe d, whilst the other end e communicates with
the receiver from which a pipe g extends to the cylinder h of the motor.
In practice I find it advantageous to arrange in the water supply pipe da tank
or cylinder i which becomes filled with water and to lead the pipe j which
conducts the exhaust steam from the cylinder of the motor through a coil k in the
said tank so that the water therein will be more or less heated before passing
into the heating coil b.
In the pipe g I arrange a three way cock l, a branch of which is connected by
a pipe m with the exhaust pipe j so that, when the steam is not required for motive
power purposes, it will be used for heating the water in the tank; in this case,
however, I advantageously employ at an arrangement of dead weight safely
valve similar to that described in the specification of my patent before referred to.
n is the reducing valve which is arranged in the water supply pipe d.
In the operation of the apparatus herein before described the water flows up
through the supply pipe d into the heating coil b at such a regulated speed that
before it reaches the top of the said coil, it is converted into steam and flows into
the receiver the reducing pressure or check valve n when the pressure of the
steam exceeds the pressure of the water, preventing the latter from being forced
back by the steam pressure into the main or supply tank. The steam from the
receiver is conducted through the pipe g to the motor which is driven thereby, the
exhaust steam from the said motor passing, as herein before stated, through
the pipe and the coil k in the tank i and heating the water in the said coil.
In practice the valve n pulsates, that is to say, it opens to pass a certain
quantity of water and when sufficient steam is generated, it closes and remains
closed until the steam escapes or is utilized when the said valve again opens under
the reduced back pressure to admit a further supply of water and so on.
In order to maintain a very rapid vapourisation of the water, I find it
advantageous to employ a second coil o in order to afford a larger heating surface
than is afforded with the arrangement shewn in figure 1.
When I use this
supplementary coil, I prefer to connect it at its lower end to the water supply pipe
d and to connect its upper end to the lower end of the coil b, for instance, by the
pipe pas shewn in figure 2 so that the water first passes up through the supple-
mentary coil and then flows to the bottom of the main heating coil and rises in
the same in the manner herein before described.
It will be obvious that a cock or other regulating device such as 9 must he
provided for controlling the supply of water to the heating coil or coils so that
at no time shall water enter the receiver f as otherwise the water would flow down
the steam pipe g to the cylinder of the motor.

page_text: 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. Apparatus for the utilization of waste heat of illuminating flames for the
production of motive power comprising a steam coil or coils arranged above the
burner the heat from which is to be utilized, one end of which coil is in connection
with a water supply pipe, whilst the other end is connected either directly or
through a steam receiver with the motor to be driven, a valve or valves being
arranged in the water supply pipe for regulating a supply of water to the heating
coil and for preventing the steam generated from forcing back the water into the
said water supply pipe, all substantially as described and for the purposes
specified.
2. Apparatus for the utilization of waste heat for the
power, constructed and arranged substantially in the
described and illustrated in the accompanying drawing.
Dated this 19th dor of Noromban 1807
production of motive
manner herein before
G. F. REDFERN & Co
4, South Street, Finsbury, London. Agents for the Applicant.