A New or Improved Gas Economising Device for Use in connection with the Incandescent Gas Light.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
A New or Improved Gas Economising Device for Use in connection
with the Incandescent Gas Light.
We, MAURICE SHEARER, of 809, Old Kent Road, Engineer, and JABEZ WILLIAM
WEDDERBURN, of 130, Hill Street, Peckham, Engineer, both London, S.E., do
hereby declare the nature of this invention to be as follows:-
This invention relates to a new or improved gas economising device for use in
connection with the incandescent gas light, and consists essentially in inserting
within the glass or other chimney of the burner a disc of mica or other suitable
material of a suitable size or area which may be suspended in its proper position
from the top edge of said chimney or in other convenient manner, or which
in certain instances may be fixed or fitted upon the top of the chimney all in
such manner that the outward flow of the heated air to the atmosphere may be
retarded, thus serving to maintain the mantle at a high temperature and thereby
permit of a given illuminating power being attained upon a smaller consumption
of gas than has been the case heretofore.
For instance, taking an ordinary incandescent burner fitted with mantle and
glass chimney of the usual type the full effect is obtained only when the gas is
turned full on, the mantle then being at a white heat throughout; but if the
gas be turned partly off a portion of the mantle becomes dull and only a pro-
portion of the same is effective. Now, in accordance with this invention this
is remedied and the full effect obtained with the smaller flow of gas by partly
closing the outlet for the heated air and gases by the use of the mica or other
disc aforesaid.
Dated thin 25th day of i 1000
GEO. COXHEAD,
For the Applicants.
A New or Improved Gas Economising Device for Use in connection
with the Incandescent Gas Light.
We, MAURICE SHEARER, of 809, Old Kent Road, Engineer, and JABEZ WILLIAM
WEDDERBURN, of 130, Hill Street, Peckham, Engineer, both London, S.E., 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 follow-
ing statement:-
This invention relates to a new or improved gas economising device and may

page_text: be used in connection with incandescent gas light mantles, Argand burners and
other similar lighting appliances where a chimney is used.
Our said device consists essentially in inserting into the chimney of such
lighting appliances a disc of mica or other suitable material of a suitable size for
the purpose hereinafter described.
This disc may be suspended within the chimney by any suitable means from
the top thereof.
The purpose of our invention is to regulate and retard the escape of the heated
air and gases into the atmosphere, whereby the temperature of combustion is
raised and an increased illuminating power obtained, when less than the full
ordinary flow of gas is utilized.
And in order that our invention may be fully understood, we will now
describe the same with reference to the accompanying drawings of which Fig. 1
& 2 are sectional elevations of the top part of a chimney to which our invention
is applied.
bis the disc or baffle inserted into the top of the chimney a. The disc or
baffle may be maintained in position by a T-shaped support, as shown at cc
in Fig. 1, the ends of which rest on the edge of the top of the chimney a; or it
may be supported by two arms d d as shown in Fig. 2, the ends of which fit over
the edge of the chimney a or by a tripod or any other suitable suspending device.
The disc or baffle b may be circular in shape or it may have a serrated edge or
one or more holes drilled through it in order to assist the passage of the heated
air and gases from the combustion chamber. In the figures the passage of the
heated air and gases is shown by the arrows to be only between the edge of the
disc or baffle and the sides of the chimney and no holes are shown in the disc or
baffle b. The apertures for the escape of the heated air whether between the
disc and the glass or through the body of the disc itself will vary in area accord-
ing to the pressure of gas used and the height of the chimney, but as a guide we
mention that the best results are obtained when the area of the disc which
checks the draught is from half to two thirds of the area of the escape at the
top of the chimney.
By the employment of this device the combustion is maintained at a higher
temperature than would otherwise be the case and an increased illuminating
power obtained from the gas consumed.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we declare that what we
claim is:
The new or improved gas economising device consisting of a disc or baffle
made of mica or other suitable material inserted within the chimney in com-
bination with suitable supporting means for suspension within said chimney
for the purpose of regulating and checking the outflow of heated air from the
combustion chamber to the atmosphere substantially as hereinbefore described and
illustrated.
Dated 1
2011 1