Improvements connected with Incandescent Gas Lamps and Burners.
Year: 1896

page_text: Date of Application, 9th Sept., 1896
Complete Specification Left, 18th Nov., 1896-Accepted, 19th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements connected with Incandescent Gas Lamps and
Burners.
I, RICHARD CROWE Jeweller's Manager, 25 Williamson Street, Liverpool,
England, do hereby declare the nature of this invention to be as follows:-
My invention has for its object the screening or partial filtration of the
atmospheric air at the moment of its entering the mixing chamber of the
atmospheric gas burner commonly known as the Bunsen burner, and which burner
is used to heat and render incandescent, the refractory material called the mantle;
which mantle in conjunction with the aforesaid burner, is commonly known as the
incandescent gas light.
My improvement and invention consists of a detachable screen or sieve made of
fine wire gauze, or other perforated material, and made to encircle the outside of the
mixing chamber of the aforesaid atmospheric or Bunsen gas burner, for the purpose
of preventing the larger particles of flocculent dust from entering the gas mixing
chamber of the aforesaid burner. The free entry of such dust very materially
interfering with the brilliancy of the light.
I make the screen preferably in two parts, joined by an hinge with spring, in
order to allow of easy attachment to, and detachment from the burner.
Dated this Seventh day of September 1896.
RICHARD CROWE.
COMPLETE SPECIFICATION.
Improvements connected with Incandescent Gas Lamps and
Burners.
I, RICHARD CROWE, of 25, Williamson Street, in the City of Liverpool,
Jeweller's Manager, 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 has for its object the screening or partial filtration of atmospheric
air at the moment of its entry into the air and gas mixing chamber of the atmospheric
gas burner commonly known as the Bunsen buruer, which burner-in conjunction
with a mantle of refractory material-forms the well known incandescent
gas-light.
Incandescent gas burners as at present constructed have the objection that the
gauze diaphragm through which the mingled air and gas pass to the interior of the
mantle becomes after a time clogged or choked with the floculent dust always
present in the atmosphere and more especially so in business premises. The result
of this choking of the diaphragm is that a greater proportion of gas passes through
it than of air, owing to the gas issuing from a nozzle under pressure, consequently
there is incomplete combustion within the mantle, and the latter becomes discoloureu
D

page_text: and weighted with unconsumed carbon which materially interferes with the
brilliancy of the light, and if allowed to accumulate on the mantle the latter
ultimately breaks under its weight. It is moreover very difficult to remove the
dust from such diaphragm, owing to the frail nature of the mantle.
My improvement and invention consists of a detachable screen or sieve, made of
fine wire gauze or other perforated material, and adapted to encircle the outside of
the aforesaid mixing chamber and so as to cover the air ingress apertures therein,
whereby the larger particles of floculent dust are intercepted and prevented from
entering.
Such a sieve may take various forms, to suit various requirements, and in the
drawing hereto annexed I have only shewn those forms which will be most
commonly employed.
Figure 1 shews a detachable sieve according to this invention applied to the base
of the air and gas mixing chamber A. of an incandescent gas burner, a being the air
ingress apertures in said chamber. Figures 2 and 3 shew the sieve separately.
The sieve here shewn consists of fine wire gauze 6 bound in two semicircular
metallic frames c, which are connected by the hinge pin d. The frames c are kept
normally closed around the chamber A by the spiral spring.e, and are opened for
the purpose of removal and cleansing by nipping the wing pieces f. In order that
the gauze b may be continuous around the chamber A. I cause it to overlap the
hinge at g, and for this purpose 1 place the gauze on the inside of one frame c and
on the outside of the other fraine, but this may be effected in other ways.
Figure 4 shews a detachable sieve according to this invention formed of one
continuous piece of fine wire gauze b, arranged to close around the base of the
chamber A by its own elasticity. The abutting edges of the gauze may be
bound with metal, as at h, and provided with a fastener i, but this is not
essential.
The detachable sieves above described may be readily removed, and freed of the
dust which they have collected by blowing through them.
The employment of such sieves or screens also prevents the destructive effects of
draughts upon the mantle, by making the ingress of air more uniform, and so
materially lengthens the life of such mantles.
Instead of wire gauze I may employ gauze of textile or other material, or
perforated metal or other sheets may be employed in the construction of such
detachable sieves.
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 I
claim is :-
A detachable sieve constructed as herein described and arranged to close around
and cover the air ingress apertures of the air and gas mixing chamber of incan-
descent gas burners, whereby floculent dust and the like is intercepted and
prevented from entering such chamber, said sieve being capable of easy removal
and readily freed of dust, as herein described.
Dated this 17th day of November 1896.
J. A. COUBROUGH,
Registered Patent Agent (Qual. by Exam.),
10 St. George's Crescent, Liverpool, Agent for the Applicant.