An Improved Means for Automatically Regulating the Mixture of Gas and Air for Incandescent Gas Lighting, and for Heating Purposes, and for Suppressing. the Noise made by the Inrush of Air when Incandescent Gas Lights are Turned Low.
Year: 1895

page_text: Date of Application, 12th UCL., 1893
Complete Specification Left, 16th May, 1896-Accepted, 27th June, 1896
Date of Application, 12th Oct., 1895
Complete Specification Left, 16th May, 1896-Accepted, 27th June, 1896
PROVISIONAL SPECIFICATION.
An Improved Means for Automatically Regulating the Mixture of
Gas and Air for Incandescent Gas Lighting, and for Heating
Purposes, and for Suppressing. the Noise made by the Inrush of
Air when Incandescent Gas Lights are Turned Low.
I, THOMAS RICHARD SHILLITO of 89 Chancery Lane, London, W.C., Engineer
and Patent Agent, do hereby declare the nature of this invention, a communi-
cation to me from abroad by Carl Moritz Römpler, Manufacturer, and Dr. Hans
Axmann both of Erfurt, Germany, to be as follows:-
In this invention the gas and air mixing tube or chimney which has somewhat
the form of a Bunsen burner but shorter, is formed at its lower end with an
enlargement which takes over the gas jet, and around and just below the orifice of
this latter is provided with a perforated horizontal bottom for the inlet of air for
mixing with the illuminating gas. The quantity of inflowing air and the mixing
thereof with the gas is automatically regulated by means of a light thin flat metal
ring, say of aluminium or platinum, which is placed loose over the perforations at
the bottom of the chimney or mixing tube and is caused by the draught formed by
the gas to vibrate or move, guided vertically, more or less up and down, so that
when the gas is turned full on, the draught or suction will be greatest and keep
the ring lifted up from the perforations thus allowing of the free inflow of air for
mixing with the gas. When the gas is turned down the suction will not be so
great and the ring will not be lifted so much thereby reducing the inflow of air.
When the gas is turned down low, as is usual in incandescent gas lighting to save
relighting, the disagreeable noise caused by the inrush of air to the mixing tube,
chimney or burner is suppressed.
The same end may be attained by mounting a thin light disc, say of mica (or a
sphere) on the top of the mixing tube, chimney or burner, said disc being carried
and guided in its up and down vibrations by ધી pin passing through the centre of
the same and fixed in a small open frame which is held on the tube by small
spring legs.
For heating purposes by means of a Bunsen or like burner the mixture of. gas
and air is automatically regulated in a mauner similar to that first. described.
Dated this 12th day of October 1895.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C.
An Improved Means for Automatically Regulating the Mixture of
Gas and Air for Incandescent Gas Lighting, and for Heating
Purposes, and for Suppressing the Noise made by the Inrush of
Air when incandescent Gas Lights are Turned Low.
1, THOMAS RICHARD SHILLITO of 89 Chancery Lane, London, W.C., Engineer
and Patent Agent, do hereby declare the nature of this invention, a communi-
cation to ine from abroad by Carl Moritz Römpler, Manufacturer and Dr. Hans
Axmaun, both of Erfurt, Germany, and in what manner the same is to be

page_text: performed, to be particularly described and ascertained in and by the renowing
statement:-
In the accompanying drawing Fig. 1 is a vertical section of a Bunsen burner
for incandescent gas lighting with this invention applied thereto. Fig. 2 is a top
view of the same. Figs. 3 to 6 are details.
arrowe 2.
is
A is the gas and air mixing tube or chimney, formed at its lower end with an
enlargement which takes over the gas jet C and around and just below the
orifice or orifices D of this latter is provided with a perforated horizontal
bottom E for the inlet of air for mixing with the illuminating gas. The perforated
bottom E is screwed into the enlargement B and has an extension F for the reception
of the gas jet to which is connected a gas supply pipe (not shown). The illuminating
gas passes into the mixing chimney in the direction of arrow 1 and the atmospheric
air through the perforations G of the horizontal bottom E in the direction of
The quantity of inflowing air and the mixing thereof with the gas
automatically regulated by means of an extremely light thin flat metal ring H
Eay of aluminium or platinum which is placed loose over the perforations Gat the
bottom of the chimney or mixing tube and is caused by the pressure of, or the
draught occasioned by, the gas to vibrate or move, guided vertically by the inner
circumference of the enlargement B, more or less up and down, so that when the
gas is turned full on, the draught or suction will be greatest and keep the ring I
lifted up from the perforated Bottom E thus allowing of the free inflow of air for
mixing with the gas. When the gas is to some extent turned down the suction or
draught will not be so great, and the ring will not be lifted so much, thereby
reducing the inflow of air in the proper proportion to the gas supply. The
extreme limit of the upward vibration of the ring H may at any time be adjusted
and thereby also the maxicum inflow of air by means of a spring split ring I
placed to bear against the inner circumference of the enlargement B, held in its
place by its friction or spring force, and after unscrewing the horizontal bottun E
capable of being easily moved up or down with the finger to any desired height, or
instead of such spring ring the maximum elevation of the vibrating ring H may
be adjusted from the outside of the enlargement. B by pins passing through the
latter and provided inside the enlargement with cams or eccentries operated to
turn towards or away from the perforated bottom by turning the pins in the one or
the other direction.
When, in ordinary incandescent gas lamps which are not fitted with a bypass,
the gas is turned down quite low, as is usual in incandescent gas lighting to save
relighting and thereby damage to the mantle which gives out the incandescence, a
disagreeable noise is caused by the inrush of air to the mixing tube, chimney, or
burner but with this invention such noise is suppressed without the aid of a
bypass and the lamp therefore simplified and rendered less expensive to this
extent.
In ordinary incandescent gas lamps fitted with bypasses for the suppression of
the noise referred to, ench bypass must be operated separately and this
requirement necessarily renders the use of such lamps in clusters at a great height
from the floor, very inconvenient, as in theatres where it is sometimes required to
frequently turn down the lights. With this invention clusters or numbers of
lamps may be turned up and down from the main at a single operation.
In the drawing the vibrating ring is, for the sake of clearness, shewn of
exaggerated thickness. Its proper thickness would be about that of note paper
and a ring external diameter with an opening of " diameter would weigh one
grain troy weight.
#
The same end as liat above described may be attained by placing on the top of
the mixing tube or chimney a device such as is shewn in clovation, in Fig. 3 and i
plan in Fig. 4 said device consisting of a light mica or other suitable dise H
carried and guided in its up and down vibrations over an apertured seating H by
a pin passing through the centre of the same and fixed in a light open meta
frame K provided with legs L which when inserted in the tube hold the devic

page_text: thereon. Instead of the light vibrating disc, a sphere or half sphere may be
mounted on the pin J or the disc may be hinged to the top of the tube and the
latter formed with a seating in the manner of a flap valve in which case the open
frame K would be dispensed with. Instead of these equivalent devices being
carried at the top of the tube, they or any one of them may be carried within the
tube at any suitable portion of its length. This may be accomplished either by
forming the tube in two lengths one to take on to the other, and fitting the device
to the top of the lower length or the devices may be carried each on a spring
expansion ring which being forced into the tube will retain its given position by
frictional resistance, but in this case the tube would have to be of somewhat larger
diameter. Either of the last mentioned devices would replace the enlargement B
and the perforated bottom E of Fig. 1, and allow of the lower part of the tube A
being of the form of the Bunsen tube as ordinarily employed in incandescent gas
lamps.
In the use of this invention the ordinary metal burner cap from which the
flame proceeds is placed on the top of the tube and is enclosed by a suspended
mantle
the usual way.
For heating purposes by means of a Bunsen burner the mixture of gas and air
is automatically regulated by or in proportion to the pressure of or draught caused
by the gas in a manner similar to that described with reference to Fig. 1.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a Bunsen burner for incandescent gas lighting and for heating purposes
the provision at the lower part of the tube of said burner of an enlarged gas and
air mixing chamber B having a removable perforated bottom, the inlet of air
through which is automatically regulated by means of an extremely light thin
vibrating or rising and falling ring H which is acted upon by and in proportion to
the pressure of or draught caused by the gas, and by means of which the noise
attendant upon the lowering of the light is suppressed without the use of a bypass,
substantially as described with reference to Fig. 1 of the drawing.
2. In a Bunsen burner for incandescent gas lighting the arrangement at the
upper part of, or within the tube of said burner of a guided vibrating or rising and
falling disc (Figs. 3, 4) or a hinged disc and perforated seating therefor, or the
like, for the purposes specified, substantially as described and shewn.
Dated this 16th day of May 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C.