IMPROVEMENTS IN DEVELOPING HEAT, BOILING WATER, AND GENERATING STEAM
Year: 1864

page_text: LETTERS PATENT to Walter Christopher Thurgar, of the City of Norwich,
Surgeon, and Robert Arthur Ward, of Maidenhead, in the County of
Berks, Gentleman, for the Invention of "IMPROVEMENTS IN DEVELOPING
HEAT, BOILING WATER, AND GENERATING STEAM."
Sealed the 9th May 1865, and dated the 11th November 1864.
PROVISIONAL SPECIFICATION left by the said Walter Christopher Thurgar
and Robert Arthur Ward at the Office of the Commissioners of Patents,
with their Petition, on the 11th November 1864.
We, WALTER CHRISTOPHER TAURGAR, of the City of Norwich, Surgeon,
and ROBERT ARTHUR WARD, of Maidenhead, in the County of Berks, Gen-
tleman, do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN DEVELOPING HEAT, BOILING WATER. AND GENERATING STEAM," to be as
follows:-
Our Invention consists in the development of heat, boiling water, and
generating steam by friction, as hereafter described. We take a steam
boiler, on the sides or at the top or bottom of which heat is developed, water
boiled, and steam generated by the constant rapid revolution of metal wheels
in contact with the boiler, or with metal blocks fixed on to the boiler, or the

page_text: required heat is developed by quickly moving or rubbing solid metal blocks
against the boiler, or the fixed blocks before mentioned, or by friction between
moving and fixed conical and other shaped surfaces, the principle being the
developement of heat by friction, as in the case of a hot axle or bearing in a
railway train. We do not confine the material of the wheels or blocks or
boiler to any particular metal or compound of metal, we use that substance
which will most rapidly develop heat by friction, regard being had to the
amount of wear and tear. When our Invention is applied to locomotive
engines, for instance, we secure the revolution of the wheels or motion of the
movable blocks, in the first instance, by a small steam engine, manual power
or otherwise. When the power of the steam and the boiler before mentioned is
sufficiently developed, the machinery connected with it can be set in motion to
secure a similar revolution of wheels or motion of blocks, and the fire in the
small engine first mentioned may be let out, and the means used to create the
primary motive power discontinued. We employ a large boiler near the first-
named boiler, or more than one, if necessary or desirable, steam from which is
to be generated in the same manner as before described, the wheels or blocks
being worked by steam generated by the small boiler in the first instance, and
ultimately by steam generated by both or all; the steam generated in the large
boiler is used for driving machinery in the same manner as steam generated
by steam boilers now in use. Steam from every boiler, the large ones as well
as the small ones, is to drive machinery to cause the revolution of wheels, or
to secure motion of movable blocks at its own top, bottom, and sides, and
also, if necessary, at the top, bottom, and sides of the other boilers, so that
the introduction of cold water into one boiler, and the possible reduction of the
water to a less heat than that required to generate steam may not stop the
machinery of the entire engine (by which term we include all the boilers),
care being taken by the engineer not to put cold water into both or all of the
boilers at the same time.
The accompanying Drawings show a simple way of carrying our Invention
into effect.
A is a barrel containing a spring; B, a toothed wheel driven by the
spring; C, a pinion on the axis of a revolving block D driven by the toothed
wheel B; E is a metal vessel or boiler formed with a jacket and concave at
bottom, in contact with which the block revolves, and by friction between
these surfaces liquid is boiled in the vessel E.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Walter Christopher Thurgar and Robert Arthur Ward in the
Great Seal Patent Office on the 11th May 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WALTER
CHRISTOPHER THURGAR, of the City of Norwich, Surgeon, and ROBERT ARTHUR
WARD, of Maidenhead, in the County of Berks, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of November, in the year of our
Lord One thousand eight hundred and sixty-four, in the twenty-eighth year
of Her reign, did, for Herself, Her heirs and successors, give and grant unto
us, the said Walter Christopher Thurgar and Robert Arthur Ward, Her
special licence that we, the said Walter Christopher Thurgar and Robert
Arthur Ward, our executors, administrators, and assigns, or such others
as we, the said Walter Christopher Thurgar and Robert Arthur Ward,
executors, administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN DEVELOPING HEAT, BOILING
WATER, AND GENERATING STEAM," upon the condition (amongst others) that
we, the said Walter Christopher Thurgar and Robert Arthur Ward, or one of
us, our executors or administrators, by an instrument in writing under our,
or one of our, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that we, the said Walter Christopher Thurgar and
Robert Arthur Ward, do hereby declare the nature of our said Invention, and
in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement thereof, reference being
had to the Drawings hereunto annexed, that is to say :-
Our Invention consists in the development of heat, boiling water, and
generating steam by friction, as herein-after described. We take a steam
boiler on the sides, or at the top or bottom of which heat is developed, water
boiled and steam generated by the constant rapid revolution of metal wheels
in contact with the boiler, or with metal blocks fixed on to the boiler, or the

page_text: required heat is developed by quickly moving or rubbing solid metal, wooden
or condensed cloth, or other blocks against the boiler, or the fixed blocks
before mentioned, or by friction between moving and fixed conical and other
shaped surfaces, the principle being the development of heat by friction, as in
the case of a hot axle or bearing in a railway train. We do not confine the
material of the wheels, or blocks, or boiler to any particular metal or com-
pound of metals; we use wooden or condensed cloth, or that substance which
will most rapidly develop heat by friction, regard being had to the amount of
wear and tear. When our Invention is applied to locomotive engines, for
instance, we secure the revolution of the wheels or motion of the moveable
blocks, in the first instance, by a small steam engine, manual power, or other-
wise. When the power of the steam in the boiler, before mentioned, is
sufficiently developed, the machinery connected with it can be set in motion
to secure a similar revolution of wheels or motion of blocks, and the fire in
the small engine first mentioned may be let out, and the means used to create
the primary motive power discontinued. We employ a large boiler near the
first-named boiler, or more than one, if necessary or desirable, steam from
which is to be generated in the same manner as before described, the wheel
or blocks being worked by steam generated by the small boiler in the first
instance, and ultimately by steam generated by both or all; the steam gene-
rated in the large boiler is used for driving machinery in the same manner as
steam generated by steam boilers now in use. Steam from every boiler, the
large ones as well as the small ones, is to drive machinery to cause the revo-
lution of wheels, or to secure motion of moveable blocks at its own top, bottom,
and sides, and also, if necessary, at the top, bottom, and sides of the other
boilers, so that the introduction of cold water into one boiler, and the possible
reduction of the water to a less heat than that required to generate steam,
may not stop the machinery of the entire engine, (by which term we include
all the boilers,) care being taken by the engineer not to put cold water into
both or all of the boilers at the same time.
The accompanying Drawings show a simple way of carrying our Invention
into effect.
A is a barrel containing a spring; B, a toothed wheel driven by the
spring; C, a pinion on the axis of a revolving block D driven by the toothed
wheel B; E is a metal vessel or boiler formed with a jacket and concave at
bottom, in contact with which the block revolves, and by friction between
these surfaces liquid is boiled in the vessel E.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that we claim, developing

page_text: heat, boiling water, and generating steam by friction, substantially by the
means and in manner herein-before described.
In witness whereof, I, the said Walter Christopher Thurgar, for myself
and on the behalf of the said Robert Arthur Ward, have hereunto set
my hand and seal, this Ninth day of May, One thousand eight hundred
and sixty-five.
W. C. THURGAR. (L.B.)