Improvements in Gas Lamps.
Year: 1898

page_text: Date of Application, 28th Dec, 1893-Accepted, 2nd June, 1899
Improvements in Gas Lamps.
We, THOMAS COOPER JOHN THOчis, of 49, Fortune Gate Road, Harlesden, in
the County of Middlesex, Engineer, and WILLIAM MUDD STILL, of 24, Chailes
Street, Hatton Garden, in the County of London, 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
This invention has reference to gas lamps of the hind described in the Specifi-
cation of former Letters Patent granted to us No 22726 of 1895 and it has for
object to effect further improvements in such lamps whereby the regenerative
effect is increased and the efficiency of the lamp consequently improved, as will
now be more fully described by the aid of the accompanying illustrative diawings
wherein Figs. 1 and 3 show, in vertical section, two constructions of railway
and 4 show in under-
carriage roof lamps according to this invention, and Figs
side view, the two reflectors shown in Figs 1 and 3 respectively
of which two are shown, but
In each construction, the flat flame burners
there may be only one or more than two, are arranged to project outwardly from
a central socket or holder 2 into which they are screwed or otherwise fixed, the
gas exit holes from each burner being so arranged that the flame extending from
the burner will present its broad or extended surface towards the removable
reflector above as in the constructions of lamps described in the said formei
Specification Gas is supplied to the socket or holder 2 and burners 1 by a pipe
that is hinged at 3" to the main gas supply pipe and descends therefrom and passes
between the outer edge of the reflector and the glass bowl 4 in the manner
described in the said former Specification The glass bowl 4, the casing 5, the
hood 6 and the support 7 for the reflector may also be arranged in accordance with
the said former Specification.
The reflector according to this invention is constructed with an inner or central
air chamber 8 arranged to terminate above the centrally arranged burners 1
and provided at its lower end with comparatively large air exit openings 9 equal
in number to the burners and preferably of approximately triangular shape (see
Figs. 2 and 3), each of these openings being so situated as to be above the flame
extending from a burner 1 below and having its narrower part toward the centie
of the reflector, the arrangement being such that air flowing downward through
such opening will impinge upon the upper surface of the flame below and passing
between it and the ieflector will effectually prevent the flame and products of
combustion from blackening the same, and will also impart to the flame a curved
The said central air chamber S
shape, shown approximately in Figs 1 and 3
is connected by pipes 8', which may be equal in number to the number of burners
used, to an outer annulai air chamber 10, the said pipes passing across the space 11
through which the products of combustion pass to the chimney 12, and each of
them being preferably placed immediately above the apex of a flame so that the
hot gases therefrom may impinge upon it
Air enters the annular chamber 10 through openings 13 in its top which may
be formed integral with or bears the lower end of the chimney 12 against and in

page_text: contact with which the inflowing air is deflected in a downward direction by means
of annular baffles 14 and 15 the former of which 18 attached to the chimney
and the latter of which is formed integial with or attached to the top of the
annular air chamber 10 The path followed by the air is indicated by arrows in
Figs 1 and 3, the products of combustion passing 1ound the pipes 9 rising through
the chimney 12 and escaping therefrom after having served to highly heat the
regenerator reflector and therefore the an passing through it In Figs 3 and 4,
the central air chamber 8, which may be dome-shaped at top and bottom, as
shown, is supported by the pipes 8 within and below the reflector proper the
lower side of which 18 of concave shape, except near its lower end, where it may
be convex as shown, and carries the chimney 12, the baffles 14 and 15 being of
straight shape in section In Figs 1 and 2 the central air chamber 8 is made
of cylindrical shape with a conical perforated lower end, the outer annular air
chamber 10 having a flattened truncated conical lower surface at the bottom and
a vertical cylindrical surface around the central opening therethrough, the
baffles 14 and 15 being of curved shape in section
The reflector however may obviously be of other shapes and in each case 18
suitably enamelled on its lower side and around the central air chamber, or is
otherwise provided at these parts with a reflecting surface
Having now particularly described and ascertained the mature of the said
invention and in what manner the same is to be performed, we declare that
what we claim is. -
1 A gas lamp of the kind herein referred to wherein the flat flame burner o
each such burner extends outward from below the centre of the reflector which
18 constructed with a central air chamber provided at its lower end with one or
more comparatively large air exit holes of approximately triangular or equivalent
shape arranged on each arranged over a buiner, the said central air chamber being
connected to an outer annulai an supply chamber by cross tubes arranged in the
path of the hot gases flowing to the chimney, substantially as herein described
to the purpose herein described.
2 In an overhead gas lamp of the kind herein referred to, a regenerator
reflector constructed substantially as herein before described with reference to and
shown in Figs. 1 and 2 of the accompanying drawings
3 The modified construction of regenerator reflector substantially as herein-
before described with reference to and shown in Figs. 3 and 4 of the accompanying
drawings
Dated this 28th day of December 1898
For the Applicant,
W LLOYD WISE,
46, Lincoln's Inn Fields, London, WC., Chartered Patent Agent