IMPROVEMENTS IN STEAM GENERATORS S GENERATORS
Year: 1878

page_text: LETTERS PATENT to William Ephraim Death and Alfred Henry Death, both
: of Leicester, in the County of Leicester, Engineers, for the Invention of
"IMPROVEMENTS IN STEAM GENERATORS."
Sealed the 4th October 1878, and dated the 8th August 1878.
PROVISIONAL SPECIFICATION left by the said William Ephraim Death and
Alfred Henry Death at the Office of the Commissioners of Patents on the 8th
August 1878.
WILLIAM EPHRAIM DEATH and ALFRED HENRY DEATH, both of Leicester, in
the County of Leicester, Engineers. "IMPROVEMENTS IN STEAM GENERATORS."
This Invention has for its object the increasing the heating surface of internal-
flued steam generators, whilst at the same time a better circulation of the water is
ensured, and greater strength is imparted to the flue, and consists in disposing or
arranging any convenient number of cruciform water tubes (of any desired section)
transversely across the flue, such tubes being rivetted or otherwise secured by flanges
to the sides of the said flue.
It is preferred that the cross arms of the said water tubes shall break joint the
one with the other along the flue, and if desired, in lieu of having four arms in
each water tube disposed at right angles, three arms or any greater number than
four may be employed.
It is obvious that this construction and arrangement of the water tubes is equally
applicable to horizontal as well as to vertical or inclined internal flues or fire-boxes,
whether of existing or of new boilers:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Ephraim Death and Alfred Henry Death in the Great
Seal Patent Office on the 20th January 1879.
WILLIAM EPHRAIM DEATH and ALFRED HENRY DEATH, both of Leicester, in
the County of Leicester, Engineers. "IMPROVEMENTS IN STEAM GENERATORS."
Our said Invention has for its object the increasing the heating surface of steam
generators generally, whilst at the same time a better circulation of the water is
ensured, and greater strength is imparted to the flue, in the case of internal-flued
boilers.
According to one mode of carrying out our Invention we arrange or dispose any
convenient number of cruciform water tubes of any desired section transversely
across the flue when applied to internal-flued boilers, such tubes being rivetted or
otherwise secured by flanges to the sides of the said flue, and we prefer that the
cross arms of the said water tubes shall break joint the one with the other along
the flue.
If desired, in lieu of having four arms in each water tube disposed at right angles,
three arms or any greater number than four may be employed.
It is obvious that this construction & arrangement of the water tubes is equally
applicable to horizontal as well as to vertical or enclosed flues or fire-boxes, whether
of existing or of new boilers, and it may also be conveniently applied to other
kinds of steam generators, as, for example, those of the "Elephant" type.
And in order that our said Invention may be fully understood, we shall now
proceed more particularly to describe the same, and for that purpose shall refer to the
several Figures on the explanatory Sheet of Drawings hereunto annexed, the same
letters of reference indicating corresponding parts in all the Figures.
Figure 1 of our Drawings represents an end elevation of an ordinary internal-
flued cylindrical boiler having our improved water tubes applied thereto; & Fig. 2
is a corresponding longitudinal vertical section of the same.
A is the internal flue, and B, B, our improved water tubes disposed at convenient
intervals along the flue. These tubes are here represented as being cruciform, or
with four radial arms b, b, at right angles to each other, the said arms being united
in any well-known manner with the sides of the flue, and disposed so as to break
joint with each other.
Fig. 3 is a diagram of a boiler of the "Elephant" type, showing the application
thereto of our water tubes B, made with three arms which connect the two lower
water chambers C, C, with the water space of the main chamber A of the boiler.
Having now described and particularly ascertained the nature of our said Inven-
tion, and the manner in which the same is or may be used or carried into effect, we
would observe in conclusion that what we consider to be novel and original, and
therefore claim as the Invention secured to us by the herein-before in part recited
Letters Patent is, the application and use to and in steam generators of the peculiar
water tubes, having three or more radial arms or branches arranged or disposed
substantially in the manner & for the purposes herein-before described and
illustrated by our Drawings.
In witness whereof, we, the said William. Ephraim Death and Alfred Henry
Death, have hereunto set our hands and seals, this Eighteenth day of
January, in the year of our Lord One thousand eight hundred and seventy-
nine
WILLIAM EPHRAIM DEATH. (LS.)
ALFRED HENRY DEATH.
(L.S.)