MENT IN LIGHTING BY COAL GAS LAMPS
Year: 1885

page_text: HENRY BAKER gas Meter Inspector Office Corporation yard, Ford Street Derby
gas Meter Inspector do hereby declare the nature of my invention for DMPROVE-
MENT IN LIGHTING BY COAL GAS LAMPS to be as follows:-
A circular casting, in form like the lower portion of a hollow cone, with a wide
flange round its circumference, at its largest end, this forms the body of the Lamp,
the heating chamber wherein the temperature of the air is raised as it passes
through to support combustion is formed with two short metal rings, one being of
a greater diameter than the other, and is made to fit into the top of the hollow
coned plate, the small ring is closed at its lower end, and terminates at its upper
end with a long chimney, it is held in a centrial position inside the larger ring by
a series of taper tubes passing through a number of holes round the circumference
of the lower terminals of the two rings, the arrangement forming a annular passage
between the inside of the larger ring, and the outside of the smaller ring, through
which the air is caused to pass to support the combustion of the gas flame, the
outer ring is partly closed at its lower end by a annular iron plate, which fits
firmly against the bottom of the tubes to keep the whole in their place, to the face
of this plate which is on the same level as the iron flange is bolted a circular
enamiled iron reflector, with slots cut out equal in number to the number of
Burners that is to be used in the Lamp.
A centrial gas supply is brought down the chimney and through the bottom of
the centrial ring of the air heating apparatus, and a number of flat flame Burners
are arranged on short arms at equal distances round its circumference.
A bell mouthed glass globe encloses the Burners, which is supported in a metal
ring by a narrow band of asbestus being placed round the circumference, at the
open end of the globe, the ring being secured to the iron flange by a hinge,
and bolt.
There is a ornamental casing which encloses the top part of the Lamp & chimney.
When the Lamp is lighted the products of combustion passes through the slots in
the enamiled iron reflector, and through the tubes in the heating chamber into the
chimney, and the air to support combustion passes down the annular passage where
it comes in contact with the outsides of the taper tubes through which the pro-
ducts of combustion pass, and is in consequence raised to a very high degree of
temperature when it passes to the gas flame.

page_text: HENRY BAKER, 15 Temple Villas Weston Road, Derby, Gas Engineer do hereby
declare the nature of my invention for IMPROVED GAS LAMP and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
My Invention has reference to the class of Gas Lamp known as the regenerative
and has for its object to increase the illuminating power and to economise the
consumption of Gas when burned in the said Lamp.
In a lamp constructed according to my Invention, I provide a ring with an
upward extension A in form like the lower portion of a truncated cone with a
downward projecting rim B on the under side of the ring, the said ring and
extension forming the body of the Lamp, the extension is surrounded by a sheath C
which is fitted to the ring & the latter is perforated in the annulous space formed
between the sheath and the ring and serves the purpose of a secondary heating.
chamber for supplying the outside of the flame with air the extension A surrounds
a cylinder D which has a series of hollow arms pipes or passages leading into a
central box or cylinder E the said cylinder having its lower end closed & the upper
terminating in a long chimney F round the circumference of the upper terminal of
the outer cylinder Ď there is a flange G and in order to make the connexion
between that & the top of the extension air tight a ring or piece of asbestos is
inserted the lower end of the cylinder D terminates with a rim like an inverted
cone marked D' to the lower end of this said rim & to the underface of the down-
ward projecting rim B the reflector or plate H is fitted with a piece of asbestos
placed between the two faces and the upper side of the reflector to make the
connections air tight the plate H has a number of narrow orifices cut in it which
may be either in a line with the radius or form the part of a semi-circle as will be
seen by figure 2 at A the number of these orifices corresponding with the number
of flat flame burners to be used in the lamp these orifices are for the purpose of
allowing the products of combustion to pass out of the Lamp and into the passages
leading into the chimney F for the admission of fresh air into the lamp there may
be either a circular hole cut out of the centre part of the plate H or the centre
may be perforated as shown at B figure 2 in order to moderate the velocity of the
current of air as it passes through the heater D to the burner an annulous of wire
gauze M or other perforated material may be placed round the space between the
periphery of the chimney and the top of the cylinder D.
The Gas supply pipe I descends through the chimney & through the bottom of
the central cylinder E to a cluster of flat flame burners J which are to be arranged
vertically or at an angle on short tubes round the circumference of the lower
terminal of the gas supply tube each burner being arranged so that when the gas
it lighted the flame is immediately under the orifices in the reflector H the number
of burners with the corresponding number of orifices in the reflector H will vary
according to the illuminating power required from the lamp the burners are enclosed
in a glass globe or shade K which is supported in a ring by means of a band of
asbestos the said ring being hinged to the ring of extension A and fastened by a
bolt Z.

page_text: Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First that in gas lamps of the kind herein before referred to the combination of
an air heating chamber forming a passage to the burners for air with hollow arms
pipes or passages for leading the products of combustion into a central chimney
and a ring with an upward extension & downward projecting rim surrounding the
heating chamber forming an annulous space between the said heater and extension
to receive the products of combustion previous to their passing into the hollow
arms pipes or passages on their way to the chimney the said extension being
surrounded by a sheath forming an annulous space between the said sheath &
extension with perforations made in the rim for the passage of air from between
the said sheath & extension into the lamp & a plate perforated for the admission of
fresh air & orifices for the passage of the products of combustion substantially as
herein before described and illustrated in the accompanying drawings.
Second that in gas lamps of the kind herein before referred to the combination of
an air heating chainber with a ring with upward extension & downward projecting
rim surrounding the said heating chamber & the sheath surrounding the said
extension & a plate perforated in the centre for the admission of air to the lamp &
orifices to the passages of the products of combustion the junctions between the said
heater & the said upward extension has also between the said ring & sheath
surrounding the said extension & also the downward projecting rim & the bottom
of heater with the reflector plate are effected by the intervention of a piece of
asbestos substantially as hereinbefore described & illustrated the flat flame burners
to be arranged under orifices in the plate as described in the Specifications.
Third that the arrangement and combination of the parts constitute the Gas
Lamp substantially as described.