wy Lamps of like Construction.
Year: 1886

page_text: W wy
Lamps of like Construction.
I, ELI HENRY GRIFFITHS of Bradford Street Birmingham, in the County of
Warwick, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to railway carriage roof lamps, and other lamps used in
exposed situations, such as, ship's lamps, masthead lamps and the like; and the
object of my said invention is to so construct the said lamps, that the ingress of
air for supplying combustion, shall in no way interfere with the steady burning of
the light. This I effect by compelling the air entering the lamp, to take a
circuitous course, by protecting or partially covering the inlets; so that wind gusts
cannot enter, or if they do enter, they become ineffective, in flickering or influencing
the burning light.
I will describe my invention in connection with a railway carriage roof lamp.
Above the globe or glass of the limp which forms the underside, a metallic body
of the ordinary kind is formed, and upon the upper part of this body, two annular
semi circular tlange like rings are situated, which rings or flanges bend downwards
and are divided from each other, by a limited space, and through this space, air is
admitted to the lamp as hereinafter described. The lateral entrance of air is
prevented by an inside lining, which compels the air to take an upward course
through openings, in the flange of a cone, which hangs over the inside body and
burner of the lamp. This cone is situated within the top of the lamp, which top
hinged to the body, and fastened by a catch in the usual manner.
The cone is of the usual kind, but is provided at its base, with a flange, having
holes or piercings running transversely through it, which are presented to the inlet
before described, when the top of the lamp is closed; and running around the body
part of the top of the lamp, and near the lower edge thereof, piercings or holes are
situated, which said piercings lead to a space enclosed between the outside of the
cone, and the inside of the head of the body of the lamp.
In front of, and surrounding the said holes or piercings last named, an annular
unpierced guard is situated, leaving sufficient space between itself and the bead,
for the free ingress of air; that is, the annular guard which comes in front of the
holes leading directly to the chamber formed between the outer side of the coue,

page_text: and the inside of the top of the lamp, is open at both top and bottom, so that any
side gust of wind is broken, and the entrance of air passes either through the top
or bottom and from thence through the side piercings into the enclosed chamber in
the head, and from thence passing upwards over the top of the cone and into the
body of the lamp. Thus, air is principally supplied through openings formed
within a flange at the base of the cone, and through side openings in the top of
the lamp, or rather near the lower edge of the top of the body of the lamp which
surrounds the cone, which openings are protected from side currents by a sur-
rounding unpierced ring open at top and bottom, and as the piercings in the sides
are in a direction at right angles to the body, any upward draughts have no effect.
By constructing lamps as described, they are simple in construction, and efficient
in use.
ELI HENRY GRIFFITHS.
By Henry Skerrett,
6, Livery Street, Birmingham,
Agent to the Applicant.

page_text: Hanway Carriage amps and other
Lamps of like Construction.
1, ELI HENRY GRIFFITHS of Bradford Street Birmingham in the County of
Warwick, Manufacturer, do hereby declare the nature of said invention for
"IMPROVEMENTS IN RAILWAY CARRIAGE ROOF LAMPS, AND OTHER LAMPS OF LIKE
CONSTRUCTION," and in what manner the same is to be performed, to be parti-
cularly described and ascertained in and by the following statement :-
My invention relates to railway carriage roof lamps, and other lamps used in
exposed situations, such as ship's lamps, masthead lamps and the like; and the
object of my said invention is to so construct the said lamps, that the ingress of air
for supplying combustion, shall in no way interfere with the steady burning of the
light This I effect by compelling the air entering the lamp, to take a circuitous
course, by protecting or partially covering the inlets; so that wind gusts cannot
enter, or if they do enter, they become ineffective, in flickering or influencing the
burning light.
I will describe my invention in connection with a railway carriage roof lamp.
Above the globe or glass of the lamp which forms the underside, a metallic body
of the ordinary kind is formed, and upon the upper part of this body, two annular
semicircular flange like rings are situated, which rings or flanges bend downwards
and are divided from each other, by a limited space, and through this space, air is
admitted to the lamp as herein after described-The lateral entrance of air is
prevented by an inside lining, which compels the air to take an upward course
through openings in the flange of a cone, which hangs over the inside body and
burner of the lamp-This cone is situated within the top of the lamp, which top is
hinged to the body, and fastened by a catch in the usual manner.
The cone is of the usual kind, but is provided at its base with a flange, having
holes or piercings running transversely through it, which are presented to the inlet
before described, when the top of the lamp is closed; and running around the body
part at the top of the lamp, and near the lower edge thereof, piercings or boles are
situated, which said piercings lead to a space enclosed between the outside of the
cone, and the inside of the head of the body of the lamp.
In front of, and surrounding the said holes or piercings last named, an annular
unpierced guard is situated, leaving sufficient space between itself and the head,
for the free ingress of air; that is, the annular guard which coines in front of the
holes leading directly to the chamber formed between the outer side of the cone,
and the inside of the top of the lamp, is open at both top and bottom, so that any
side gust of wind is broken, and the entrance of air passes either through the top
or bottom, and from thence through the side piercings into the enclosed chamber
in the head, and from thence passing upwards over the top of the cone and into the
body of the lamp-Thus, air is principally supplied through openings formed
within a flange at the base of the cone, and through side openings in the top of the
lamp, or rather near the lower edge of the top of the body of the lamp which
surrounds the cone, which openings are protected from side currents by a sur-
rounding unpierced ring open at top and bottom; and as the piercings in the sides
are in a direction at right angles to the body, any upward draughts have no effect.

page_text: By constructing lamps as described, they are simple in construction, and emcient
in use.
I will now proceed to describe with reference to the accompanying Drawings, the
manner in which the same is to be performed.
Figure 1 represents in longitudinal vertical section a railway carriage lamp
constructed according to my invention. Figure 2 shows an elevation of a portion
of the said lamp, and figure 3 is a horizontal vertical section upon the dotted
lines A B figure 1.
The same letters of reference indicate corresponding parts in the several figures
of the Drawings.
a is the body of the lamp, which is of the ordinary kind, aud b is a globe or
glass at the bottom or underside thereof. c is the head of the lamp, and c³ the cap
thereof, having top and bottom air exit passages c³. d is a cone situated within
the inside top or head of the lamp, and which said cone part is provided at its base
with a pierced flange d³, and through the piercings d' of which, air passes to the
lamp burner. e is an annular unpierced guard, and fare piercings or holes running
all round the body of the lamp; and which said piercings lead into the space g,
enclosed between the outside of the cone d, and the inside of the top of the lamp.
The annular suspended guard e, which comes in front of, and surrounds the
holes f, is open at top and bottom, and through which air passes to the piercings
or holes f, and from thence over the inside edges of the overhanging annular
flange h and finally through the cone flanged piercings d³ to the interior of the
body of the lamp.
Side gusts of wind are prevented from entering the lamp, as air for supplying
combustion has to pass between the guard e, and from thence through the
piercings f, into the space g enclosed between the outside of the cone, and the
inside of the head of the lamp, through the space 2, between the overhanging
flange and the cone, and finally passing through the piercings d² as before
described.
Having now particularly described and ascertained the nature of my said inven-
tion I declare that what I claim is :-
First. The construction and combination of parts hereinbefore described and
illustrated in the accompanying drawings, whereby the ingress of gusts of wind or
air is prevented from gaining access to the interior or flame of the lamp; that is
to say, placing or disposing in front of the inlet holes or piercings f in the upper
part of the body of the lamp, an unpierced annular ring-like guard e, open at top
and bottom, and through which said open parts air is admitted and also providing
the base of the conical interior portion d, with a pierced flange d² d³, which latter
is situated a short distance below a flange h, with annular space or piercings h³,
substantially as and for the purpose herein described and illustrated.
Secondly. In railway carriage roof and other lamps; the combination with the
piercings of the unpierced annular guard e; also the combination of the guard e
and piercings f, with the annular pierced flange h h and cone and pierced
flange d d² d³ substantially as described and set forth.
Dated this twenty eighth day of October 1886.