A Draught Protector for Incandescent Gas Lights.
Year: 1895

page_text: Date of Application, 15th Mar., 1895
Complete Specification Left, 31st Aug., 1895-Accepted, 15th May, 1896
PROVISIONAL SPECIFICATION.
A Draught Protector for Incandescent Gas Lights.
WILLIAM WRIGHT 2 Saltash Street Plymouth, Brass Finisher, and FRANCIS
JAMES PALMER REED, Wine and Spirit Merchant, 5 Alton Terrace, Plymouth,
Devon do hereby declare the nature of this invention to be as follows:-
I take a piece of metal or other suitable material, which I make into a suitable
shape so as to fit on the burner below the mantle, allowing sufficient space for the
chimney to pass over, which piece of metal or other suitable material, protects the
mantle from an upward draught, thereby improving the durability of the mantle
with better results in regard to light & the mantle.
Dated this 14th day of March 1895.
WILLIAM WRIGHT.
FRANCIS JAMES PALMER REED.
A Draught Protector for Incandescent Gas Lights.
We, WILLIAM WRIGHT of 2 Saltash Street, Plymouth, Brass Finisher, and
FRANCIS JAMES PALMER REED, Wine and Spirit Merchant, of 5 Alton Terrace,
Plymouth in the County of Devon, do hereby declare the nature of this 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 has for its object to protect the mantle of an incandescent gas
burner against upward draught and to increase the luminosity of the light, and
lengthen the life of the mantle; and the invention consists of means for breaking
up the air currents entering the chimney from below and thus preventing it from
entering the mantle.
The invention will be best understood by reference to the accompanying drawings
in which
Figure 1 is a view partly in elevation and partly in vertical section showing an
incandescent gas burner with our improvements applied thereto, and
Figure 2 is a plan with the chimney removed.
Like letters indicate like parts throughout the drawings.
A is the usual burner adapted to fit on to a Bunsen burner in the ordinary
manner, and B is the usual gallery for supporting the chimney C and connected to
the burner A by the wings or brackets A¹.
D is a wire gauze perforated or equivalent floor (hereinafter termed a "perforated
floor") which in accordance with this invention we fit into the gallery B so that the
air entering the chimney C through its lower end, that is to say all the air excepting
that mixed with the gas has to pass through the perforations of this floor and is
thereby broken up into a number of fine streams its destructive tendency upon the
mantle E being in consequence very materially reduced if not altogether neutralized.
The perforated floor D may be formed either in one piece which would be a
convenient arrangement for application to a new burner, or in segments for
application to existing burners."

page_text: To prevent the 'air which as before described enters the lower end of the
chimney C from entering the lower end of the mantle E and thereby decreasing the
Juminosity of the light, we fit an annular cup or shield F around the burner A so
that the lower edge of the mantle will be received in said shield, the inner edge of
the shield fitting tightly around the burner so that no air can pass between it and
the burner. The outer edge of the shield extends, as shown, to within a short
distance of the adjacent surface of the lamp-chimney so that the up-current of air
is deflected all round the shield, away from the mantle and towards the said surface
of the chimney. If desired however we may form the shield F with perforations
which, while allowing the air to pass through, will prevent any draught reaching the
mantle with sufficient force to damage it. We may also use the shield independently
of the perforated floor. The shield F may be adjusted to any part of the burner A
between the parts marked G and H to suit mantles of various lengths.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is;—
1. The combination with an incandescent gas mantle of a cup or shield such as F
for the purpose described.
2. The combination with a gas burner and incandescent mantle such as E of an
annular cup or shield such as F closely surrounding the burner and adapted to
receive or surround the lower edge of the mantle substantially as and for the purpose
described and illustrated in the accompanying drawings.
3. The combination with a gas burner and incandescent mantle such as E and an
annular cup or shield such as F closely surrounding the burner and adapted to
receive or surround the lower edge of the mantle of a perforated floor such as D
for breaking up or dividing the current of air entering the lower end of the chimney
substantially as and for the purpose described and illustrated in the accompanying
drawings.
Dated this 29th day of August 1895.
WILLIAM WRIGHT.
FRANCIS JAMES PALMER REED.
Boult & Wade,
Agents for the Applicants.