Year: 1887

page_text: Date of Application, 22nd Feb., 1887
Complete Left, 21st Nov., 1887
Complete Accepted, 23rd Dec., 1887
I THOMAS GARDINER MARSH of Lytham in the County of Lancaster Gas Engineer
do hereby declare the nature of this invention to be as follows:-
These improvements refer to Regenerative Gas Lighting in which there is a central
downward air supply and a closed globe and their object is to increase the illuminating
power of the gas by simple means. It is now well known that to obtain the best
results in Regenerative Gas Lighting the heated air must be directed on to one or
both sides of the issuing gas and preferably about right-angles. Various methods of
accomplishing this are in use. but they are all more or less complicated. In carrying
out my invention I cause the gas to issue laterally from holes round the gas supply
pipe. Immediately below these holes I place a Hange having a diameter of about
double the gas supply pipe so that the issuing gas passes over it. The nozzle of the
central air supply pipe which is about double the diameter of the Flange is preferably
placed about one eighth of an inch above and around the Flange. When the gas is
burning the incoming air from the central supply pipe causing the issuing flame to
be slightly compressed against the flange very materially increases the brilliancy of
the remaining portion of the flame the interior of which is supplied with air from the
central supply pipe and the exterior by a suitable quantity of air admitted into the
globe preferably about midway between the sides of the globe and the flame.
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page_text: I THOMAS GARDINER MARSH of Lytham in the County of Lancaster, 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 and accompanying drawings:-
My said Invention relates to regenerative gas lamps in which heated air is supplied
from above to the flame which is enclosed in a glass shield as is usual. The gas is
supplied from a central supply pipe and issues from a series of horizontal perforations
to be burned. Immediately beneath these perforations is situated a flange or collar
over which the gas passes as it issues from the perforations. The heated air current
from above is so directed as to strike or impinge at right angles or thereabout upon
the flame at or near the root and above the said flange so as to compress the flame or
issuing gas against the said flange or collar. The result of this compression of the
flame or current of gas against the flange is to cause greatly increased brilliancy of
the light owing partly to the intimate union of the heated air with the gas whereby
the gas is thoroughly oxygenated and the carbonaceous particles in the flame rendered
more completely incandescent and luminous. The lower side of the flame is supplied
with heated air which is or may be admitted to the closed glass shield at a point about
midway between the flame and the interior of the shield.
And in order that my said invention may be properly understood I will now proceed
more particularly to describe the same with reference to the annexed illustrative sheet
of drawings.
Fig. 1 is a sectional view of my improved burner applied to a suitable form of
pendant regenerative gas lamp.
Fig. 2 is a separate and enlarged view of the improved burner.
a.
It will be understood that the arrangement and construction of the lamp in so far
as the regenerative arrangements are concerned is not novel and forms no part of my
invention. I have however considered it advisable to illustrate such a type of lamp
for the purpose of rendering more clear the application and working of my improved
burner. The lamp is hung by the central gas supply pipe
The gas descends in
the direction of the arrows and issues from a ring or series of horizontal perforations
near the foot of the pipe a. The resulting flame is of a saucer shape or of the shape
shown by the indication marked b. Immediately beneath the efffux perforations is
situated a flange c. In the arrangement of lamp shown, the products of combustion
from the flame pass upward through the annular spaced and impart heat to
passages and chambers ƒ and g finally escaping by the chimney which surrounds
the gas pipe a.
The air enters the regenerative upper portion of the lamp through the radial
passages e and thence into the chamber f being heated during its passage. The foot
of the chamber f is open or might be closed by a wire gauze cap. The heated air
flows downward as shown by the arrows and impinges at about right angles upon the

page_text: upper side of the flame near the root. A secondary supply of air enters the heating
chamberg through perforations in the top of the lamp and is discharged into the
interior of the glass shield i at a point about midway between the flame and the
interior of the glass shield. This secondary supply of air feeds the lower side of
the flame as shown by the arrows. As clearly shown in Figs. 1 and 2 the current
of heated air from the chamber f strikes perpendicularly or nearly so upon the root of
the flame and above the flange c. The flange prevents the flame from yielding to the
pressure of the air current so that the heated air is forced into and becomes thoroughly
assimilated with the gas immediately upon the latter leaving the efflux openings.
The gas flame is thus compressed at or near the root between the descending current
of hot air and the flange c with the result that the brilliancy of the flame is increased.
The gas and the carbonaceous atoms therein contained are brought into immediate
and intimate contact with the heated air and are quickly oxygenated so that they are
rendered more completely incandescent and luminous. The lighting of the lamp may
be effected through an opening k at the foot of the glass shield or the said shield
may be hinged at to the upper part of the lamp, and held when closed by a catch m.
Although I have illustrated my improved burner as applied to a pendant lamp in
which the gas is supplied from above it is equally applicable to lamps supported upon
a standard, pedestal or bracket and in which the gas is led from beneath.
Fig. 3
illustrates the form which the improved burner would assume in such a case the arrows
showing the direction of the compressing hot air current. The gas might issue
through a narrow annular efflux opening instead of through the horizontal perforations
shown and described.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is:
In regenerative gas lamps the employment of an annular flange or ledge c situated
iminediately beneath the horizontal gas efflux perforations or equivalent gas efflux
opening or openings so as to sustain the issuing gas or flame against the downward
current of heated air, for the purposes and substantially as described and shown.
Dated this 19th day of November 1887.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.