IMPROVEMENTS IN STEAM BOILERS
Year: 1852

page_text: LETTERS PATENT to William Scholfield, Engineer, and Joseph
Pritchard, Boiler Maker, both of Oldham, in the County of
PROVISIONAL SPECIFICATION left by the said Wilham Scholfield
and Joseph Pritchard at the Office of the Commissioners of
Patents, with their Petition, on the 9th October 1852.
We, WILLIAM SCHOLFIELD, Engineer, and JOSEPH PRITCHARD, Boiler
Maker, both of Oldham, in the County of Lancaster, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN STEAM BOILERS'
to be as follows:-
Ourimprovements consist of the shape and construction of the fire box,
which we make circular, as shown in the accompanying outline Drawing.
By this improvement we gain a considerable saving of fuel with a
proportionate consumption of smoke, the details and particulars of
which we will more fully explain in our Complete Specification.

page_text: WHEREAS Her most Excellent Majesty Queen Victona, by Her
Royal Letters Patent, bearing date the Ninth day of October, in the
year of our Lord One thousand eight hundred and fifty-two, and in the
sixteenth year of Her reign, did, for Herself, Her heirs and succes-
sors. give and grant unto us, the said William Scholfield and Joseph
Pritchard, Her especial license that we, the said William Scholfield
and Joseph Pritchard, our executors, administrators, and assigns, or
such others as we, the said William Scholfield and Joseph Pritchard,
our exccutors, 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, our Invention of
"IMPROVEMENTS IN STEAM BOILERS," upon the condition (amongst others)
that we, the said William Scholfield and Joseph Pritchard, or one of
us, should particularly describe and ascertain the nature of our said
Invention, and in what manner the same was to be performed, by
an instrument in writing under our hands and seals, or under the hand
and seal of one of us, and cause the same to be filed in the Great Scal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent, as reference being thereunto had
will more fully and at large appear.
NOW KNOW YE, that we, the said William Scholfield and Joseph
Pritchard, do hereby declare the nature of onr said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, that is to say:
Our Invention relates to improvements in vessels used for generating
and confining steam generally, called steam boilers, and consists of
making the flue or fire box of a circular form, so that the contraction
and expansion of the metal shall be equal throughout the whole area
thereof. It is evident that this form of a flue must be stronger and
capable of bearing a much greater pressure than any hitherto adopted,
as well as dispensing with stays, which, if not judiciously fixed and
_made of proportionate strength, will weaken the boiler instead of
strengthening it, and thereby be a means of causing accidents by
explosions, collapse. &c., instead of preventing them as intended.

page_text: The nature of our said improvements will be understood by reference
to the accompanying Sheet of Drawings, on which the same letters of
reference are used to represent similar parts where different views
or diagrams are shewn. Fig. 1, represents a sectional elevation of a
boiler, shewing the multitubular form at the back part or beyond the
flue; Fig. 2, another view of the same, shewing the tubes arranged in
vertical lines, so that the dirt or refuse will more easily fall between
them; Fig. 3, a longitudinal section; Fig. 4, an end elevation; and
Fig. 5, a plan thereof. a, is the circular flue or fire box; b, the com-
bustion chamber for the better combustion of the gases and consuming
the smoke; c. the small tubes or multitubular form behind the fire
box; d, the entrance door under the grate bars e, for the purpose
gaining access to the tubes to clean and repair them when necessary.
The other parts of the boilers, such as man hole, furnace-door, taps. &c..
are so well known that it is unnecessary for us to refer to them.
And having thus described the nature of our said improvements, we
desire it to be distinctly understood that we do not claim any of the
separate parts herein referred to, except as in combination with the
circular form of flue or fire box herein described.
In witness whereof, we, the said William Scholfield and Joseph
Pritchard, or one of us, have hereunto set our hands and seals
or hand and seal, this Fourth day of April, One thousand eight
hundred and fifty-three.
WILLIAM SEWOLFIELD. (L.S.)
JOSEPH PRITCHARD.
Signed, sealed, and delivered by
one or both the said parties
hereto in the presence of
E. J. HUGHES,
Patent Agent,
Manchester.
(LA.)