Improvements in the Tops of certain kinds of Railway Carriage Lamps.
Year: 1897

page_text: Date of Application, 9th Dec., 1897
Complete Specification Left, 8th Sept., 1898-Accepted, 19th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in the Tops of certain kinds of Railway Carriage
Lamps.
I, JOHN LEVICK, of Alma Street, Aston, near the City of Birmingham, Metal
Spinner, do hereby declare the nature of this invention to be as follows:-
This invention relates to the tops of certain kinds of railway carriage lamps,
principally to gas lamps of the type known as Popes patent lamps, in which the
tops are usually made in several component parts, viz., the wind-guard or shield, the
cone, the top rim, the top cover and the chimney.
The top rim is made in the form of an annular ring, coming over two rows or
circles of holes near the outer edge of the top cover, between which rows, the top
edge of 'the body of the lamp comes, so that one row or ring series of holes comes
outside the lamp whilst the other series is upon the inside, whereby air for sup-
porting combustion passes through the outer set of holes into the annular space
between the top rim and top cover and then into the body of the lamp through
the inward set of holes.
The chimney is directed through a hole in the middle of the top cover and has
its lower end depending into the body of the lamp whilst the upper end extends
into the inside crown of the upright and side-pierced cone, whose lower boundary
edge is bell mouthed or flared and is soldered in common with the inner edge of
the top rim to the top cover, whilst the outer edge of the top rim is soldered to
the beaded outer edge of the top cover.
The wind guard may be attached to the cone, and the chimney to the top cover,
by soldering.
and
Now owing to the inner edge of the top rim being soldered to the top cover,
owing to the joint becoming loosened by vibration and rough usage, water of
condensation accumulating in the cone, or water from rain or other causes outside
the lamp, is apt to insinuate itself through the joint, enter the annular air space
between the top rim and cover and fall through the inner series of air holes into
the interior of the lamp.
The object of the present improvements is to obviate this defect or defects, and
to make a top perfectly proof against any ingress of moisture into the interior
of the lamp and this I propose to accomplish by making the top rim and top
cover of two shells of practically the same diameter, and with the outer parts
where the air inlet holes come, annularly dished in reverse directions to form the
annular cavity or air space, wherethrough the air enters and takes a circuitous
course in gaining access to the inside of the lamp, so that the top rim and top
cover shells, at their inner portions, may lie flat upon one another, whilst those
parts approximate to the air holes are separated.
The outer edges of the rim and cover may be connected together by a part of
the one being turned over the flange of the other, whereby they may be secured to
one another without soldering, whilst their inner edges may be secured, by solder-
ing or otherwise to one another and to the outside of the chimney. The edge of
the flared mouth of the cone is soldered or otherwise secured to the top rim, and

page_text: should this joint become leaky, water of condensation accumulating inside the
cone cannot get into the interior of the lamp, but runs off the top.
The whole of the parts are preferably made from spun metal, and most of their
connections with one another may be made without soldering.
As another form of my invention, the upper part of the chimney may be made
in common or integral with the inner part of the top rim, and the metal at the
junction of these parts may be chambered or recess shouldered, in which recess,
the flanged inner edge of the top cover may lie, together with the upper edge of
the lower part of the chimney, which is made separate from the upper part, the
later being made in common with the top rim.
Dated this 8th day of December 1897
Improvements in the Tops of certain kinds of Railway Carriage
Lamps.
I, JOHN LEVICK, of Alma Street, Asion, near the City of Birmingham, Metal
Spinner, 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 the tops of certain kinds of railway carriage lamps,
principally to gas lamps of the type known as Popes patent lamps, in which the
tops are usually made in several component parts, viz., the wind-guard or shield,
the cone, the top rim, the top cover and the chimney.
The top rim of an ordinary Popes lamp is made in the form of an annular ring,
coming over two rows or circles of holes formed near the outer edge of the top
cover, between which rows, the top edge of the body of the lamp comes so that
one row or ring series of holes comes outside the lamp whilst the other series is
upon the inside, whereby air for supporting combustion passes through the outer
set of holes into the annular space between the top rim and top cover and then into
the body of the lamp through the inward set of holes.
The chimney is directed through a hole in the middle of the top cover and has
its lower end depending intofthe body of the lamp whilst the upper end extends
into the inside crown of the upright and side-pierced cone, whose lower boundary
edge is bell mouthed for flared and is soldered in common with the inner edge of
the top rim to the top cover, whilst the outer edge of the top rim is soldered to
the beaded outer edge of the top cover.
The wind guard is supported around the coue, whilst the chimney is secured to
the top cover by soldering.
Now owing to the inner edge of the top rim being soldered to the top cover, and
owing to the joint becoming loosened by vibration and rough usage, water of
condensation accumulating in the cone, or water from rain or other causes outside
the lamp, is apt to insinuate itself through the joint, enter the annular air space
between the top rim and cover and fall through the inner series of air holes into
the interior of the lamp.
The object of the present improvements is to obviate this defect or defects, and
to make & top perfectly proof against any ingress of moisture into the interior
of the lamp and this I propose to accomplish by making the top rim and top
cover of two shells of practically the same diameter and arranging and providing

page_text: them as hereinafter described and represented in the accompanying drawings, in
which
Figure 1 represents, upon a large scale, a complete vertical section of the top
of a railway carriage lamp embodying my improvements.
Figure 2 is a like sectional view of the said lamp top, but with the several com-
ponent parts thereof disassembled.
Figure 3 represents, upon a smaller scale, an elevation of the said lamp top.
Figure 4 is a topside plan thereof upon the same scale and Figure 6 shows
another vertical section.
The same letters of reference indicate corresponding parts in the said Figures 1
to 5 of the drawings, a being the chimney, the top cover, the top rim, d the
cone and e the wind guard.
C
The top rim c and top cover b are made from two shells of practically the same
diameter and superficial area, with the outer parts b, c, of them separated or
annularly dished in reverse directions, to form the annular cavity or air space,
overlying the double ring or piercings 6, 3, formed around the top cover, one
row 6, coming on the outside and the other row b, on the inside of the side wallsf,
of the lamp, and through which aunular space the air enters and takes a cir-
cuitous course in gaining access to the inside of the lamp.
The middle por-
tions of the top rim and top cover shells, surrounding the chimney are
formed into socketting sleeves at b, c, and thus lie flat upon one another, whilst
by thus making the top rim of the same diameter as the top cover the soldered
joint between the two shells comes or is included within the flared mouth ', of
the cone d, and is thus in such a position as to be out of the influence of moisture
accumulating within the said cone.
The outer edges of the rim and cover may be connected together by a part
of the one being turned over the flango of the other, or they may be soldered,
whilst their inner edges may be secured, by soldering or otherwise, to one another
and to the outside of the chimney. The edge of the flared mouth of the cone is
soldered or otherwise secured to the top rim, and should this joint become leaky,
water of condensation accumulating inside the cone cannot get into the interior
of the lamp, but runs off the top.
The wind guard c, which surrounds the piercings 3, of the cone through which
the products of combustion escape from the lamp, is supported by feet e', whose
lower ends are soldered or otherwise secured to the top rim.
The whole of the parts are preferably made from spun metal, and most of their
connections with one another may be made without soldering.
Figure 6 represents a section of another form of lamp, in which the metal at
the middle part of the top rim c, is turned over the edges of the middle sleeve 66,
of the top cover b, thus producing a more perfect joint between the said com-
ponent shells.
Figure 7 represents another form of my invention, in which the upper part a',
of the chimney a, is made in common with or as an integral part of the top rim c,
with the metal at the junction of these parts annularly chambered or recess-
shouldered at 5, to form a seating for the reception of the flanged inner edge 66,
of the top cover b, together with the upper edge of the lower part a³, of the
chimney a, which is made separate from the upper part, the latter being made-
as aforesaid in common with the top rim.
Instead of making the upper part of the chimney as an integral extension of
the top rim as illustrated, it may in like manner be formed integrally with the
metal of the top cover.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:-
::
First In & Popes" or like lamp top, making the top rim of the same, or
approximately the same, superficial area as the top cover, with the said rim and

page_text: cover located one above the other and with their outer parts separated to form an
annular air space, whilst the joint at their inner parts comes preferably approxi-
mate to the chimney and within the cone, substantially as described and set forth.
Secondly: In a "Popes" or like lamp top, making the top rim and top cover
or their equivalents from two shells or discs of metal, both of approximately the
same superficial area, disposed one over the other but separated at parts to form
an annular air space and with their joint coming at or near the chimney and
within the cone, the flared mouth of which comes upon the said top rim shell
substantially as and for the purpose described and set forth.
Thirdly: The modified form of "Popes or similar top for railway carriage
and like lamps, in which a portion of the chimney is made integral with the top
rim or top cover, with the joint between the said rim and cover coming within
the cone of the lamp top, substantially as and for the purpose described and set
forth.
"
Daku
tony Ten day of September 1898.
JOHN LEVICK,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.