Improvements in Fittings for Gas Lanterns.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Fittings for Gas Lanterns.
I, FREDERICK SOUTHWELL CRIPPS, of 27 Great George Street, Westminster,
London Civil Engineer do hereby declare the nature of this invention to be as
follows:-
This invention has for its object the prevention of dust from being drawn or
blown into a gas lantern containing an incandescent or other gas burner, as well
as preventing any sudden gusts of wind from entering the same.
In incandescent gas lighting particularly, it is found in practice that, the small
holes in the nipple of the burner are frequently stopped up by dust which has to be
removed by some special appliance when discovered, otherwise the efficiency of the
gas light is seriously affected.
The dust settling upon an incandescent mantle has also a detrimental effect,
increasing its weight and reducing its illuminating power and durability.
It is also found that when the air enters the gas burner in sudden gusts, the
flame either flickers, or, in the case of incandescent mantles, the light varies rapidly
in intensity, being more regular and intense at one moment than another; and
when the bye-pass burner alone is alight a sudden gust of wind may extinguish it.
It is also found in general practice that the dust entering the lantern necessitates
the glass being cleaned inside, oftener than would otherwise be necessary.
In order to prevent these damaging effects caused by dust, I filter the air through
any convenient kind of filtering substance, material or fabric preferably of a fibrous
or woolly nature, such as cotton wool, asbestos fibre or woven material which is of
sufficiently open nature to permit a free, full and uniform supply of air for the
efficient consumption of the gas and the maintenance of draught, and at the same
time to catch or filter out any dust or other solid matter which might damage any
part of the gas burner or mantle within, as hereinbefore stated.
The filtering material may be contained in an air vessel, receiver or director
below the burner or in any other convenient position which would necessitate the
air passing through the filtering material in order to enter the lantern or burner
within.
Dated this Seventh day of July 1896.
Improvements in Fittings for Gas Lanterns.
1, FREDERICK SOUTHWELL CRIPPS, of 27 Great George Street, Westminster,
London Civil Engineer 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 the prevention of dust from being drawn or

page_text: blown into a gas lantern containing an incandescent or other gas burner, as well
as preventing any sudden gusts of wind from entering the same.
In incandescent gas lighting particularly it is found in practice that the small holes
in the nipple of the burner are frequently stopped up by dust which has to be removed
by some special appliance when discovered; otherwise the efficiency of the gas light is
seriously affected.
The dust settling upon an incandescent mantle has also a detrimental effect by
reducing its illuminating power and durability.
It is also found that when the air enters the gas burner in sudden gusts, the flame
either flickers or, in the case of incandescent mantles, the light varies rapidly in
intensity, being more regular and intense at one moment than another, and when the
bye-pass burner alone is alight a sudden gust of wind may extinguish it.
It is also found in general practice that the dust entering the lantern necessitates
the glass being cleaned inside oftener than would otherwise be necessary.
In order to prevent these damaging effects caused by dust and sudden gusts of wind,
I filter or pass the air through any convenient kind of filtering substance, material or
fabric preferably of a fibrous or woolley nature, such as cotton wool, asbestos fibre
or woven material which is of sufficiently open nature to permit a free, full and
uniform supply of air for the efficient consumption of the gas and the maintenance of
draught, and at the same time to catch or filter out any dust or other solid matter
which might, damage any part of the gas burner or mantle within, as hereinbefore
stated.
The filtering material may be contained in an air vessel, receiver or director
below or above the burner or in any other convenient position which would necessitate
the air passing through the filtering material in order to enter the lantern or burner
within.
The filtering material not only prevents the dust passing when air is drawn in when
the gas is alight, but it prevents air being blown in either at the top or bottom or
other part of the lantern to which it may be applied whether the gas be alight
or not.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The filtration of the air as it enters any kind of lantern 'used for lighting purposes
through filtering materials, substantially as and for the purpose herein set forth.
Dated this Seventh day of April 1897.
FREDERICK SOUTHWELL CRIPPS.