Year: 1887

page_text: Date of Application, 25th May, 1887
Complete Left, 27th Feb., 1888
Complete Accepted, 20th Apr., 1888
I, CHARLES EDWIN GURNSEY, of 43 Merchant Street, in the City and County of
Bristol, lamp and lantern manufacturer, do hereby declare the nature of this invention
to be as follows:-
The improved lamp in which this invention consists is designed more particularly
for use in streets, roads or other open situations. It is furnished at the top with two
perforated chimneys, one placed concentrically within the other, and so arranged
that the apertures or perforations of the inner chimney are not opposite but inter-
mediate between those of the outer chimney. The perforations or apertures in the
outer chimney are flanked by strips or wings projecting inwards, and the perforations
or apertures in the inner chimney are similarly flanked, the strips or wings projecting
outwards. At the bottom the outer chimney rests on the lamp frame at intervals and
a space is thus provided for the admission of air to the space between the chimneys.
By the air admitted to the space between the chimneys the latter are kept cool and,
by the strips or wings aforesaid, the force of the incoming current is broken, the
current deflected upwards and a down draught obviated. The products of combustion
find a ready exit through the perforations in the inner chimney. The chimneys are
surmounted by a conical band such as is usually employed in lamps of the kind.
This invention consists further in the use of a simple form of baffling appliance
which is placed in the perforated basket or chamber usually appended for admitting
air to lamps of the class. The baffler consists of a hollow open-ended box or vessel
which may be either of cylindrical, conical, angular or other suitable shape. It is
placed upright in the basket, that is to say, it stands on one of its open ends, the
other open end being at the top. The air entering around the baffler is received
thereby and the current is checked and deflected upward accordingly.
The lamp may be so made that the upper part thereof may be detached at the waist
and, for convenience in packing or storing, the upper part may, after having been
detached be inverted, over the lower part.

page_text: I, CHARLES EDWIN GURNSEY, of 43 Merchant Street, in the City and County of
Bristol, lamp and lantern manufacturer, 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 :-
The improved lamp in which this invention consists is designed more particularly
for use in streets, roads or other open situations, but is adapted also for use in other
places. It is furnished at the top with two perforated chimneys one placed concen-
trically within the other, and so arranged that the apertures or perforations of the
inner chimney are not opposite but intermediate between those of the outer chimney.
The perforations or apertures in the outer chimney are flanked by strips or wings
projecting inwards, and the perforations or apertures, in the inner chimney are similarly
flanked, the strips or wings projecting outwards. At the bottom the chimney rests on
the lamp-frame at intervals and a space is thus provided below the outer chimney for
the admission of air to the space between the chimneys. By the air admitted to the
space between them the chimneys are kept cool and, by the strips or wings aforesaid,
the force of the incoming current is broken, the current deflected upwards and a down
draught obviated. The products of combustion find a ready exit through the perfora-
tions in the inner chimney. The chimneys are surmounted by a conical band and cap
such as are usually employed in lamps of the kind.
This invention consists further in the use of a simple form of baffling appliance
which is placed in the perforated basket or chamber usually appended for admitting
air at the bottom of lamps of the class. The baffler consists of a hollow open-ended
box or vessel which may be either of cylindrical, conical, angular or other suitable
shape. It is placed upright in the basket, that is to say, it stands on its lower edge.
The air entering around the baffler is received thereby and the current is checked
and deflected upward accordingly.
The lamp may be so made that the upper part thereof may be detached at the waist
and, for convenience in packing or storing, the upper part may, after having been
detached, be inverted over the lower part.
Referring to the accompanying sheets of drawings, Fig. 1 sheet 1 represents a
vertical section of a part of the upper portion of a lamp constructed in accordance
with this invention. Fig. 2 is a sectional plan.
The lamp is furnished with two perforated chimneys a and b concentrically arranged,
as shown. The perforations c of the inner chimney bare intermediate between the
perforations d of the outer chimney a. The perforations in both chimneys are
flanked by wings, of which those of the outer chimney a are turned inwards and
those of the inner chimney b are turned outwards. The outer chimney does not
extend at the bottom down to the lamp frame e but terminates at a convenient distance
above it and is supported on it by toes situated at intervals around the chimney.
Thus in addition to the perforations a space is provided below for the entrance of air

page_text: The force of the incoming
the wings at the sides of
Direct access of the full
between the chimneys a and b which are thereby kept cool.
current is broken, and the current is deflected upwards by
the perforations, as indicated by the arrows Fig. 1 sheet 1.
force of the current to the interior of the lamp is prevented by the wings and creation
of a down draught obviated.
The chimneys are surmounted by a conical band g and cap h such as are usually
employed in lamps of the kind.
At Fig. 1 sheet 2 of the accompanying drawings is represented a part elevation
and part vertical section of one form of the improved baffling appliance in which the
invention further consists. The baffler is placed in the gauze basket m attached at
the foot of such lamps for admitting air thereto and prevents a direct rush of air
entering the lamp. The baffler represented is conical, flanged at the top, and is open
at both ends. It is placed upright in the basket, as shown. The air entering around
the baffler is received on the outside thereof and the force of the current deflected
upwards into the body of the lamp, more especially around the glass which is thus
kept cool, and flickering of the light is obviated.
The baffler may, instead of being conical, be cylindrical, hexagonal or of any
convenient-shape.
This invention consists, lastly, in constructing a lamp of the class so that the top
part thereof is detachable at the waist. At Fig. 2 sheet 2 of the drawings is illus-
trated this form of construction. o indicates one of the radial bars of the top cover
and o' the glass part of the section. All the sections of the top or cover are rigidly
secured together, and along the foot of each is formed a flange p which lies on the
top of the waist r and is bolted thereto by bolts s situated at suitable intervals apart, or
by other convenient means.
The cover or top may be readily detached at the waist by removing the bolts or
undoing the equivalent fastenings and, for convenience and saving of space in packing,
the cover may, when thus detached, be inverted and placed chimney downwards into
the body of the lamp.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a lamp for lighting open and other places, the use of two perforated chimneys
arranged concentrically and with the perforations in one intermediate with those in the
other, and provided at the perforations, with wings or baffle plates which, in the inner
chimney, extend outwards and, in the outer chimney, inwards, whereby the force of
currents entering the space between the two chimneys is broken and a down draught
obviated, substantially as herein before described.
2. In a lamp for lighting open and other places, the use, for breaking the force of
currents entering the lamp at the bottom thereof, of an open-ended baffler of cylin-
drical, hexagonal or other suitable shape, so placed in the usual gauze basket as to
intercept currents entering thereat and deflect the same equably upwards, substantially
as hereinbefore described with reference to Fig. 1 sheet 2 of the appended
drawings.
3. In a lamp for lighting open and other places, constructing the top or cover separate
and detachable, at will, from the body, at the waist thereof, substantially as herein-
before described with reference, to Fig. 2 sheet 2 of the accompanying drawings.
+000
NICHOLAS WATTS,
Applicant's Agent.