Improvements connected with Incandescent Lamps or Burners.
Year: 1894

page_text: Date of Application, 25th Jan., 1894
Complete Specification Left, 25th Oct.; 1894-Accepted, 8th Dec.,
1894.
PROVISIONAL SPECIFICATION.
Improvements connected with Incandescent Lamps or Burners.
I, HARRY TEE, of 57, Bold Street, Liverpool, in the County of Lancaster.
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to incandescent gas lamps or burners, and to that
kind of such lamps or burners in which a net-work mantle or hood-made of matter
incombustible at the temperature of an ordinary Bunsen burner burning ordinary
hydrocarbon gases-is heated to incandescence by the flame of a Bunsen burner,
burning within said mantle or hood; and the primary object of this invention is
to provide such an improvement or improvements in connection with said lamps
or burners as shall give to the mantle or hood a longer life than those at
present have.
In lamps or burners of the above kind, that is lamps with a central Bunsen:
burner and a funnel or cylindrical part about said burner head, it is found that
damage (commencing at the lower edge) is caused to such mantle or hood, and its
shape and size altered, and its life shortened. According to this invention the
defect is obviated, and this is done by so making the burner or lamp or the mantle
so formed or fashioned-or both lamp or burner is so made and mantle so formed or
fashioned-as to preclude air from acting on such lower edge as I find now takes.
place in incandescent lamps or burners. I find that by so constructing, forming, or.
arranging, these parts, or either of them, the edge of the mantle or hood is not
damaged or destroyed, nor is the mantle put out of form or shape or its size altered,
as happens under ordinary circumstances at present.
A purpose and effect of my improvements other than that above described is to
enable incandescent lamps or burners wherein mantles or hoods are used to give out
practically the same light after they have been used a considerable time as they do
when new per unit of gas used.
The means or constructions for carrying out this invention may take various.
different forms; as for instance, in some cases as applied to existing forms or
burners or lamps, on or about the head of the burner, I may provide a ring, cup,
plate, or the like, by which the lower edge of the mantle or hood is shielded or;
protected against being acted upon by the upward current of air which in such
burners passes through the burner; in which case the space for air may with.
advantage be narrow or made smaller. Or, in another case, the space ordinarily
existing between the burner head and the funnel or outer cylinder may be entirely
closed by a plate or other suitable contrivance, in which case some air should bc.
admitted to the space between the mantle or hood and funnel or outer cylinder at a
point above the lower edge of the, mantle or hood, or said plate or contrivance: or,
both these constructions or provisions may be used in combination. The provisions
or contrivances just referred to may be applied to the under or lower part of the
burner or the upper part thereof as may be deemed advisable or expedient. In
other cases the effect may be attained by so forming the mantle or hood at its lower
edge as for instance by turning it inwards, or arranging it in relation to the burner
as to shield or protect it against any action or current of air thereon.
The parts, provisions, or contrivances above specified may be either made as
separate or separable parts, or in one with the other part or parts in connection with
which it or they is or are disposed or fit.

page_text: In some cases in carrying out the invention, the mantles or hoods may have
their lower edges turned or rolled up or strengthened so as to form a selvage or
self protective edge; in which case the formation should be made at the same
period of the hood's or mantle's manufacture, as the formation of the upper part,
namely, while the module or base is being formed or made.
It is to be stated the invention is not restricted to the means or constructions for
carrying it out, hereinabove more particularly referred to, but may be modified as
to modes of performing same, or forms, or constructions, to meet special conditions,
cases, or requirements.
Dated this 24th day of January 1894
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.
COMPLETE SPECIFICATION.
Improvements connected with Incandescent Lamps or Burners.
I, HARRY TEE, of 57, Bold Street, Liverpool, in the County of Lancaster,
Engineer, 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 has reference to incandescent gas lamps or burners, and to that
kind of such lamps or burners in which a net-work mantle or hood-made of matter
incombustible at the temperature of an ordinary Bunsen burner burning ordinary
hydrocarbon gases-is heated to incandescence by the flame of a Bunsen burner,
burning within said mantle or hood; and the primary object of this invention is
to provide such an improvement or improvements in connection with said lamps
or burners as shall give to the mantle or hood a longer. life than those at
present have.
In lamps or burners of the above kind, that is lamps with a central Bunsen
ourner and a chimney or cylindrical part, about said burner head, it is found that
_damage, commencing at the lower edge, is caused to such mantle or hood, and its
shape and size altered, and life shortened. According to this invention the defect
is obviated; and this is done by so.making the burner or lamp as to preclude air
from acting on such lower edge which I find now takes place in incandescent lamps
or burners. I find that hy so constructing, forming, or arranging, these parts, the
edge of the mantle or hood is not damaged or destroyed, nor is the mantle put out of
form or shape or its size so much altered, as happens under ordinary circumstances
at present. A further purpose and effect of my improvements is to enable
incandescent lamps or burners, wherein mantles or hoods are used, to give out
practically the same light after they have been used a considerable time as they do
when new, per unit of gas used.
The means or constructions for carrying out this invention may take various
different forms; as for instance, in some cases as applied to existing forms or
burners or lamps, on or about the head of the burner, I may provide a ring, cup,'
plate, or the like, by which the lower edge of the mantle or hood is shielded or
protected against being acted upon by the upward current of air which in such
burners passes through the burner; in which case the space for air may with
advantage be narrow or made smaller. Or, in another case, the space ordinarily
existing between the burner head and the funnel or outer cylinder may be entirely
closed by a plate or other suitable contrivance, in which case some air should be
admitted to the space between the mantle or hood and chimney or outer cylinder at
a point above the lower edge of the mantle or hood, or said plate or contrivance ;
or, both these constructions or provisions may be used in combination. The
provisions or contrivances just referred to may be applied to the under or lower

page_text: یند
part of the burner or the upper part thereof as may be deemed, advisable or
expedient.
The part, provisions, or contrivances above specified may be either made as
separate or separable parts, or in one with the other part or parts in connection
with which it or they is or are disposed or fit.
In the drawings, given under Figures 1, 2, and 3, illustrating this invention, I
shew three modifications, wherein the upper part of an incandescent gas lamp or
burner of the ordinary type is shewn provided with my improvements.
Referring to Figure 1, a is the burner head, and a smaller tubular portion
thereof, which, under the ordinary construction, fits over a Bunsen burner tube.
The head portion a in this case is the same diameter throughout its depth. c is the
mantle, and d is the gallery supporting the chimney e, it being carried from the
tubular part by the brackets d'. In this case, the means employed to effect
the ends and purposes of the invention, above specified, in connection with the
mantle c, consists of an annular trough shaped device f. fitting over the burner
head a, within which the lower edge at c¹ of the mantle lies when in place. The
device, in this instance, is shewn to be supported by its upper edge "being
turned over inwards, and resting upon the upper rounded edge of the burner head,
over which it is adapted to slide freely, or with an easy or loose fit.
As regards the action of this construction, air enters the chimney past the
device between its outer wall and the chimney; such air is therefore prevented
from acting upon the lower edge c' of the mantle; and this edge being disposed in
the annular space within the device f,. remains undisturbed; and, consequently, no
detrimental or destructive action, due to the flow or action of air or gas thereon, can
take place.
In the modification shewn in Figure 2, an annular trough shaped device f,
substantially similar to the device ƒ shewn in Figure 1, is employed. The burner
head, however, in this case, is one having different diameters at the upper and
lower halves, the lower half being smaller than the upper; and the device f is
adapted to fit closely and press upon the said lower part of the head, acting as a
spring frictional clip, inwards, by its inner wall being provided with slots or cuts,
at, as shewn. In other respects than these the construction is similar to that
set forth with reference to Figure 1.
In the modification shewn in Figure 3, the means of effecting the ends and
purposes of the invention consist of closing or shutting up the lower end of the
burner, between the chimney and the tube b, by a structure or parts f, consisting of
a vertical ring, and a horizontal plate, the horizontal plate extending in annular
form from the tube 6 to the vertical ring, the upper edge of which projects above
the lower edge of the mantle, which edge lies within the space between the head a
and said plate. Thus the space between the vertical ring and the burner is a closed
one, except at its upper edge or part. The lower part of the structure or device
is practically an extension of the lower part of the gallery d, inwards, to the
tube b, air being admitted to the chimney by holes in the bottom of the
gallery, as shewn, into the annular space between the vertical ring off and
the chimney.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein described improvement connected with gas lamps or buruers
wherein a mantle or the like is rendered incandescent by the heat due to the
combustion of gas; that is to say, a lamp or burner wherein the lower edge of the
mantle is shielded or protected, as or substantially as in the manner described,
against deterioration or destruction; for the purposes specified.
2. The devices or means, by which the lower edge of the mantles of incandescent
gas lamps or burners of the kind herein referred to are shielded or protected against

page_text: deterioration or destruction, set forth with reference to and shewn in Figures 1 and 2,
and Figure 3, of the drawings.
Dated the 24th day of October 1894.
CHEESEBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.