IMPROVE- MENTS IN STEAM ENGINES FOR INCREASING THE POWERS THEREOF BY A DIFFERENT FORM OF PISTON, INTERNAL TOP AND BOTTOM OF CYLINDER
Year: 1862

page_text: LETTERS PATENT to Nathaniel Symons, Ironfounder, of No. 6, Cambridge
Street, St. Pancras, London, Middlesex, for the Invention of "IMPROVE-
MENTS IN STEAM ENGINES FOR INCREASING THE POWERS THEREOF BY A
DIFFERENT FORM OF PISTON, INTERNAL TOP AND BOTTOM OF CYLINDER."
Sealed the 15th August 1862, and dated the 19th February 1862.
PROVISIONAL SPECIFICATION left by the said Nathaniel Symons at
tho Office of the Commissioners of Patents, with his Petition, on the
19th February 1862.
I, NATHANIEL SYMONS, Ironfounder, of No. 6, Cambridge Street, St.
Pancras, London, Middlesex, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN STEAM ENGINES FOR INCREASING THE POWERS THEREOF
BY A DIFFERENT FORM OF PISTON, INTERNAL TOP AND BOTTOM OF CYLINDER," to be
as follows:-
My Invention refers to a mode of increasing the surface and motive power
of pistons and valves, also internal top and bottom of cylinders, by means of

page_text: corrugations, indentations, and grooves, (see Drawing, Sheet No. 1, marked
A, B, C,) or in any other form or shape that will increase the superficial area
without increasing the diameter of cylinders.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Nathaniel Symons in the Great Seal Patent Office on the
19th August 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, NATHANIEL
SYMONS, Ironfounder, of No. 6, Cambridge Street, St. Pancrass, London,
Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of February, in the year of our
Lord One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Nathaniel Symons, ller special licence that I, the said Nathaniel
Symons, my executors, administrators, and assigns, or such others as I,
the said Nathaniel Symons, my 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 STEAM ENGINES FOR INCREASING THE POWERS THEREOF
BY A DIFFERENT FORM OF PISTON, INTERNAL TOP, AND BOTTOM OF CYLINDER,"
upon the condition (amongst others) that I, the said Nathaniel Symons, my
executors or administrators, by an instrument in writing under my, 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 I, the said Nathaniel Symons, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
My Invention refers to a mode of increasing the surface and motive power

page_text: of pistons, internal top and bottom of cylinders, by means of corrugations,
indentations, or grooves, (see Drawing, Sheet No. 1,) or in any other form
or shape that will increase the superficial, area without increasing the diameter
of cylinders.
NATHANIEL SYMONS. (L.s.)