IMPROVEMENTS IN WATER HEATERS FOR BOILING OR HEATING PURPOSES
Year: 1881

page_text: LETTERS PATENT to Andrew Sweet, of 102, Hampstead Road, in the
Parish of St. Pancras and County of Middlesex, Ironmonger, for an Invention
of "IMPROVEMENTS IN WATER HEATERS FOR BOILING OR HEATING
PURPOSES."
PROVISIONAL SPECIFICATION left by the said Andrew Sweet at the
Office of the Commissioners of Patents on the 16th March 1881.
ANDREW SWEET, of 102, Hampstead Road, in the Parish of St. Pancras &
County of Middlesex, Iron-monger.
"IMPROVEMENTS IN WATER HEATERS FOR
BOILING OR HEATING PURPOSES.”
The principle involved in this Invention is an arrangement of gas burners and
enclosed water conduits in such a manner that cold water becomes heated to any
temperature on passing through them. The object in the heating is to obtain the
most powerful concentrated gas burner, the gas burning under the ordinary con-
ditions of illumination. This object I attain by using a series of rings, into which
I screw a large number of Nos. 1, 2, and 3 fishtail burners in a radial position, the
second series of burners being arranged to burn between the first and so on.. About
four and a half inches over each of these rings I place a condensation plate preferably
of fire clay supported on wire standards.
The heater or boiler I make of a cylindrical form having an inner lining forming
a water way jacket. The water to be heated enters at the bottom of this jacket
and flows to the top, when it overflows into one of a series of circular heating
chambers, falling through an arrangement of tubes from one heating chamber to
another till it reaches the boiling plate; these heating chambers are so contrived
that when once charged they retain about one half their capacity of water which
cannot be drawn off. This arrangement is to prevent accident through neglect.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Andrew Sweet in the Great Seal Patent Office on the
16th September 1881.
ANDREW SWEET, of 102, Hampstead Road, in the Parish of St. Pancras and
County of Middlesex, Ironmonger. "IMPROVEMENTS IN WATER HEATERS FOR
BOILING OR HEATING PURPOSES."
•
The principle involved in this Invention is an arrangement of gas burners and
enclosed water conduits in such a manner that cold water becomes heated to any
temperature on passing through them. The object in the heating is to obtain the
most powerful concentrated gas burner, the gas burning under the ordinary con-
ditions of illumination. This object I attain by using a series of rings, into which
I screw a large number of 1, 2, 3, fishtail burners in a radial position, the second
series of burners being arranged to burn between the first, and so on; about four
and a half inches over each of these rings I place a condensation plate preferably of
fire clay supported on wire standards. The heater or boiler I make of a cylindrical
form having an inner lining, forming a water way jacket; the water to be heated
enters at the bottom of this jacket and flows to the top, when it overflows into
one of a series of circular heating chambers, falling through an arrangement of tubes
from one heating chamber to another till it reaches the boiling plate. These heating
chambers are so contrived that when once charged they retain about one half their
capacity of water which cannot be drawn off. This arrangement is to prevent
Fig. 1 shows the heater in section. 9 is the inlet from the cold water cistern or
service entering the water jacket 4; the water flows up this jacket until it reaches
the outlet 10, when it overflows into one of a series of heating chambers 21, which
has a central hole or flue, its circumference fitting close to the water jacket. From
this chamber when drawn in small quantities the water overflows into the second
chamber 21 through the pipe 5, which, as can be seen, is lower than the others;
should the quantity be too great for pipe 5 to carry it off, pipe 6 comes into action,
and so on.
The passage of water is continued to the boiling plate 8 in the same
manner, when it passes through the outlet 11 ready for use. It will be seen on
reference to the Drawing that outlet 11 is not bent after the fashion of an
ordinary bib, as that form causes a syphon action to take place. The arrows
show the direction of heat derived from the gas burner or other source of
heating.
Fig. 2 represents in plan the vessel 2¹ and the pipes above referred to Nod. 5, 6,
7, and also the centre hole or flue.
Fig. 3 is a plan of the burner.
Fig. 4 shows the second plate 211 in plan. The heat and products of combustion
in this case pass around the outside, as shewn by the arrows in Fig. 1.
Fig. 5 shows in section an atmosphere burner. 1 is the mixing chamber where
the gas and air are mixed; 2 is a piece of wire gauze of finely perforated plate
separating the mixing chamber from a second chamber above it; 3 shows this
chamber, which is of very small capacity, so that a powerfully explosive mixture
cannot be contained therein. In this plate I drill a large number of holes
about diameter, thus producing a nipple burner, that is to say, a "short flame"
burner

page_text: Having thus described the nature and object of my said Invention, I declare that
what I claim and desire to be secured to me is,―
The general arrangement, construction, and combination of four or more heating
chambers connected in the manner shewn and stated in conjunction with a water
jacket heated by burners, substantially as herein before described and shown in the
Drawings.
In witness whereof, I, the said Andrew Sweet, have hereunto set my
hand and seal, this Fifteenth day of September, in the year of our Lord One
thousand eight hundred and eighty one. .