Improvements in Regenerative Gas Lamps.
Year: 1890

page_text: Date of Application, 9th July, 1890-Accepted, 6th Sept., 1890
COMPLETE SPECIFICATION.
Improvements in Regenerative Gas Lamps.
I ALEXANDER OGILVIE BROWN of 27 Holyrood Quadrant Glasgow in the County
of Lanark North Britain Gas 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 :-
My invention which relates to Improvements in Regenerative Gas Lamps under
one head is a further development of my former improvements for which letters
patent were granted A.D. 1888 No. 3838 and consists in so arranging the air
passages for the most part above the burner, in such manner that I ain enabled to
greatly simplify the construction and thereby cheapen the manufacture of such lamps.
In accordance with my said former patent, air was injected through an opening in
the bottom of the globe and led up through the burner mingling with currents of
down flowing air which become highly heated in its passage before reaching the
flame.
Now I have found by experimental tests that by dispencing with bottom burner
fittings and using a much simpler form of burner (not forming part of my present
invention) and excluding air altogether from entering at the bottom I obtain the
same or nearly the same illuminating results.
The foregoing objects I attain by causing air to pass into the body of the lainp
where it becomes partially heated, whence it is led through radial passages or ducts,
(which in cross section are of a hollow oval form) into the hot air or regenerative
chamber by being made to pass over the top edge of an inner tube placed in the said
chamber where it becomes highly heated before reaching the flame. The construction
of regenerative chamber and inner tube having been fully described and illustrated
in my former patent further reference need not be made in my present improvements.
Under a second head my invention relates to a wind casing or shield for
regenerative lamps, when such lamps are or may be used in exposed places such for
instance as the outside of shops or other buildings and consists in an outward casing
provided at or near the top and bottom with perforations leading to louvres through
which the boisterous air is injected and consequently converted into uniform currents
before being initially heated.
Other louvres are provided at the top of the chimney through which the products
of combustion pass off. In order that my invention may be properly understood and
readily carried into effect, I have hereunto appended two explanatory sheets of
drawings on the several figures of which corresponding parts are marked with the
same letters of reference. Fig. 1 is a part elevation and part vertical section of a
regenerative gas lamp. Fig. 2 is a horizontal section taken on the line A. b Fig. 1.
Fig. 3 is a cross section of one of the air passages made in accordance with and
constituting my present improvements while Fig. 4 is a part elevation and part vertical
section of a wind casing to be used in conjunction with regenerative lamps as and
for the purposes herein before explained.
The lamp illustrated in Fig. 1 is of the usual form of regenerative lamps now in use
and A represents the air passages the external and internal shape of which will be
better understood by reference to Fig. 3. The downward elliptical or oval form of
which presents a greater heating surface to the overflowing air in its passages to the
heating chamber than has hitherto been employed. The waste gases or products of
combustion pass through the openings formed by the said passages A up to the
chimney and in their passage impart heat to the inflowing air. In the manufacture
of my improved lamp I have found it less troublesome and less expensive to cast the
part marked B and the part marked C together.
It will be observed in Fig. 1 that I have here adopted a simple form of deflector D

page_text: which is made in the shape of an annular ring, is or may be of thin metal or other
suitable substance or material secured in position, by bayonet joint and studs or
otherwise. The underface of the said deflector D and the ring G which suspends the
globe may be glazed or enamelled.
In practice I obtain very satisfactory results by so elevating the burner F say "of
an inch or thereabouts below the refractory ring G of the lamp and without the
employment of any kind of perforations whatever. Although I have shewn in the
accompanying drawings only three of my improved radial air passages, it is to be
understood that a less or a greater number may be found expediant in various forins
of lamps. The wind casing or covering marked H Fig. 4 is or may be composed of
inetal, earthernware or analogous argillaceous material and of a more or less'ornamental
character. The perforations I near to the top and J at the bottom of the said casing H
provide openings for the ingress of air to the lamp for feeding the flame. The air so
entering is intercepted by louvres or annular luffer plates K K L L' and is thereby
converted into hot uniform currents of air requisite for the more perfect combustion
of the lamp.
The direction of the flow of air is indicated both in Figs. 1 & 4. The products
of combustion pass off through the louvres M formed at the top of the chimney
Fig. 4.
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 1
claim is
1. In regenerative gas lamps, in combination with regenerative chamber and upper
projecting inner tube, the radial air passages of a hollow oval or similarly curved
form in section substantially as and for the purposes hereinbefore described and shewn
in Fig. 1. 2. 3 upon the annexed sheet of drawing.
2. In combination with regenerative gas lamps the wind casing or covering H
substantially as and for the purposes hereinbefore described and shown at Fig. 4 of
the accompanying sheets of drawings.
ALEXANDER OGILVIE BROWN,
27, Holyrood Quadrant, Glasgow, Applicant.