Improvements in Incandescent Gas Lamps or Burners.
Year: 1896

page_text: Date of Application, 21st Feb., 1896
Complete Specification Left, 30th Mar., 1896-Accepted, 2nd May, 1396
PROVISIONAL SPECIFICATION.
Improvements in Incandescent Gas Lamps or Burners.
I, EDWARD JOHN SHAW, of Astral Works Hatherton Street Walsall in the
County of Staffordshire, Lamp and Glass Manufacturer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to certain improvements in incandescent gas lamps or
burners in connection with which mantles or hoods of incombustible material are
used, and its objects are to ensure greater durability to the mantle or hood in use
than is obtained in existing forms of construction of burners, and to prevent injury
to the mantle, either through vibration, curling and splitting, or contact with the
chimney when removing the same.
A common defect in existing devices for protecting the mantles of incandescent
burners is that the protecting part or shield interferes with or obstructs the access
of air to the mantle, whereby the combustion and light are rendered imperfect, and
a shadow is caused by the shield.
According to my invention adequate protection against injury to the mantle is
afforded without unduly interfering with the supply of air necessary for combustion,
whilst by reason of the open form of the shield no shadow is cast."
In order to obtain the results above mentioned, I propose to construct the shield
or protecting device of a cylindrical form, open at the top and bottom, and fitting
around the burner. It may be formed either of sheet metal or of a piece of tubing
of the requisite diameter. In the sides of the shield or cylinder, openings are
provided for the free passage of air, and the lower edge is furnished with three or
more projecting claws to tack on to the support bars of the burner or otherwise, to
engage the openings in the triangle for the purpose of securing the device in
position. The shield is arranged to receive and enclose within it the lower edge
of the mantle, and it extends downwards around the burner a sufficient distance for
its security. Air entering the chimney from below passes freely upwards to the
mantle, and circulates in and out through the openings in the sides of the cylinder,
whereby an active and ample supply of air for combustion is ensured, at the same
time that adequate protection is afforded to the lower part of the mantle against
injury or deterioration..
By a modification of the above arrangement, I may provide the shield interiorly
with a perforated metallic ring, or gauze flange, arranged immediately below the
lower edge of the mantle for the purpose of effectually protecting the lower
portion of the same. The construction in other respects is similar to that already
described.
Dated tL: T
C

page_text: COMPLETE SPECIFICATION.
Improvements in Incandescent Gas Lamps or Burners.
I, EDWARD JOHN SHAW, of Astral Works, Walsall, in the County of
Staffordshire, Lamp and Glass 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 relates to certain improvements in incandescent gas lamps or
burners in connection with which mantles or hoods of incombustible material are
used, and its objects are to ensure greater durability to the mantle or hood in use
than is obtained in existing forms of construction of burners, and to prevent injury
to the mantle either through vibration, curling and splitting, or contact with the
chimney when removing the same.
A common defect in existing devices for protecting the mantles of incandescent
burners is that the protecting part or shield interferes with or obstructs the access
of air to the mantle, whereby the combustion and light are rendered imperfect and
a shadow is caused by the shield.
According to my invention adequate protection against injury to the mantle is
afforded without unduly interfering with the supply of air necessary for combustion,
whilst by reason of the open form of the shield, no shadow is cast.
My invention will be more clearly understood by reference to the accompanying
drawing upon which-
Figure 1 is a sectional elevation of an incandescent gas burner shewing my
improved shield applied thereto.
Figure 2 being an elevation of the shield shewn on Fig. 1.
Figure 3, a plan of the same.
Figure 4, au elevation of a shield shewing the clips C arranged vertically.
In carrying out my invention I construct the shield or protecting device A of a
cylindrical form, open at the top and bottom, and arranged to fit around the burner B.
It may be formed either of sheet metal, or of a piece of metal tubing of the
requisite diameter. In the sides of the shield or cylinder A, suitably arranged
openings a may be provided for the free passage of air, and the lower edge of the
device is furnished with three or more clips or projecting claws C, adapted either
to lock onto the support bars D of the burner, or to engage the openings of the
triangle E for the purpose of securing the shield A in position.
I may form the clips C of projections bent outwardly from the edge of the
cylinder, as shewn in plan on Figure 3, or bent inwardly as indicated on the same
figure in dotted lines. Or, I may otherwise make the clips C of downward
projections divided vertically, as shewn on Figure 4, so as to fit over the support-
bars D of the burner;-or I may provide any other suitable catches or clips for
securing the shield A upon the triangle E or support-bars D of the burner.
The shield A may alternatively be made without the openings a in its sides, and
is arranged to enclose within it the lower edge of the mantle F, and it extends down-
wards around the burner a sufficient distance to allow of the clips C engaging in
the support-bars D, or triangle E as above described.
.
Air entering the chimney from below passes freely up to the mantle F, and
where the perforated form of shield is adopted-air currents also circulate around
it and through the openings a, whereby an active and ample supply of air for
combustion is ensured, at the same time that adequate protection is afforded by
the construction and arrangement of the cylindrical shield against injury or
deterioration of the mantle F from accidental or other causes.
By a modification of the above described arrangement, I may provide the
shield A interiorly with a perforated metallic diaphragm, or gauze flange c,
arranged immediately below the lower edge of the mantle F, as indicated in dotted

page_text: lines on Fig. 4, for the purpose of more effectually protecting the lower portion of
the same. The construction in other respects will in this case be similar to that
already described.
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 :-
1. In an incandescent gas lamp or burner, a cylindrical shield A open at the top.
and bottom, and with its sides perforated or otherwise, detachably arranged around
the burner, and encircling the lower part of the mantle or hood F, for the purposes.
and as described with reference to the accompanying drawings.
2. In an incandescent gas lamp or burner, a detachable cylindrical shield A open
at the top and bottom, encircling the lower part of the mantle F, and provided
interiorly with a perforated diaphragm or gauze flange c for the purposes and as
described with reference to Figure 4 of accompanying drawings.
3. Cylindrical shields for incandescent gas burners, constructed combined, and.
arranged substantially as described and illustrated upon accompanying drawings.
Dated this Twenty-seventh day of March 1896.
For the Applicant,
GEDGE & FEENY,
60 Queen Victoria Street, London, E.C., Chartered Patent Agents..