Improvements in or Applicable to Gas Conservatory Boilers and Gas Stoves.
Year: 1887

page_text: Improvements in or Applicable to Gas Conservatory Boilers and
Gas Stoves.
I, GEORGE SHREWSBURY, of Newgate Street, in the County of Middlesex,
Manufacturer, do hereby declare the nature of the said Invention, and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :—
This Invention relates to certain improvements in or applicable to gas conservatory
boilers and gas stoves.
The special object of the Invention is to obviate the disadvantages consequent
upon the use of such apparatus as at present constructed and in which owing to the
occurrence of down draught the heated or burnt air is prevented from having free
escape through the flue and at times escapes or is blown out of the air supply
openings at the lower part of the boiler or stove. This defect is in a great measure
due to the difference in elevation of the air supply inlets and of the burnt air outlet,
and it is of such frequent occurrence as to cause considerable inconvenience should
the stove or boiler. be placed inside a conservatory or other enclosed structure or
building.
To this end, the present Invention (which is illustrated on the accompanying
drawings in sectional elevation in Fig. 1, in sectional plan view through, a, b, in
Fig. 2, and in plan view in Fig. 3,) consists, essentially, in the construction of the
outer case, 1, of such boilers and stoves of a closed formation, except as hereinafter
stated, and in fitting the same with air pipes, 2, 3, of any suitable shape in cross
section, both leading from the top of the case, 1, and being extended through the
roof or top part of the conservatory, structure, room, or building in which the
apparatus is used, and both terminating at practically about the same elevation,
the top end of the outlet pipe, 3, however, being preferably carried a little higher than
the top end of the air inlet pipe, 2. The lower end of the outlet pipe, 3, terminates
just within the top of the case, 1, but the inlet pipe, 2, is carried down inside the
case, 1, below the level of the burner, 4, and to within a short distance of the bottom
of the case.
In such boilers or stoves wherein an atmospheric gas burner is used, as in the
modification illustrated on the accompanying drawings, the air inlet bulb, 5, thereof

page_text: is enclosed from communication with the outside air, within a closed chamber or
side extension, 6, of the case, 1, open only to the interior thereof, and is consequently
in free communication with the bottom end of the air inlet pipe, 2, and draws its
supply of air therefrom. An opening, 7, affording means of access to the burner,
is made in the lower part of the case, 1, and this opening is normally closed by a
closely fitting door, S, which also closes against one side of the chamber or extension, 6,
the door being hinged at 9, and provided with a handle and catch at, 10, and an
inspection or sight hole at, 11, and being hooked at, 12, to the burner which is
pivoted at, 13, and can be drawn out of the case, 1, simply by opening the door, 8.
14 is the gas inlet to the burner.
As the case, 1, is of a closed formation otherwise than as hereinbefore described,
it will be seen that the pipes, 2, 3, afford the only means of air supply and escape,
and the effect is such, when the apparatus is in action, as to permit of stoves and
boilers constructed in accordance with the present improvements being placed inside
the conservatory or building without liability of causing the inconvenience above
referred to.
The usual interior arrangements of the boiler or stove are not represented on the
accompanying drawings, as the Invention has no reference to any particular
construction thereof.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I declare that what I claim is :-
The hereinhefore described improvements in or applicable to gas conservatory boilers
and gas stoves, the same consisting
1. In constructing the outer case of such apparatus of a closed formation, and in
fitting the same with air inlet and outlet pipes, substantially as hereinbefore described.
2. In such apparatus wherein an atmospheric burner is used, enclosing the air bulb
in a chamber only open to the said closed case, and causing the same to draw its supply
of air from the said air inlet pipes leading thereinto, substantially as hereinbefore
described.
3. The opening affording access to the burner in combination with the door closing
the same and the adjacent side of the said closed chamber, substantially as hereinbefore
described.
4. The application and use in combination of the closed case, air inlet and outlet
pipes, enclosed air bulb, enclosing chamber, access opening, and closing door, substan-
tially as hereinbefore described.
D: Deal
1003
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.