Improvements Relating to Cycle Lamps.
Year: 1897

page_text: I, HARRY LUCAS, of the Firm of Joseph Lucas & Son, Manufacturers, of The Tom
Bowling Lamp Works, Little King Street, in the City of Birmingham, do hereby
declare the nature of this invention to be as follows:-
This invention consists of improvements relating to cycle lamps and especially to
such lamps having a diagonally divided body, my object being to arrange the side
glasses in a more efficient manner, and to provide a dome or chimney part that shall
permit of the free escape of the gaseous products from the flame but effectually
prevent any down draught.
I form the side glasses for a lamp having a diagonally divided body, from four
separate pieces or panes of glass preferably of varying colour, fitting two of such
panes upon the one half and the others upon the opposite half of the diagonally
divided body. The panes are secured within frames or socket like pieces soldered or
otherwise rigidly attached to the lamp body or pressed out or formed from the metal
of such body. The pane apertures and the frames or retaining pieces are so arranged
that when fitted in position upon the lamp they together form a window partaking
of the configuration of a Maltese cross.
I construct the dome or top part of the lamp from two metallic cup shaped pieces
fitting the one within the other but with an annular space between them. The
upper and closed end of the outer cup is perforated to permit of the passage of a
current of air through the annular space, whilst the inner cup is perforated to
permit of the escape of the hot air and gaseous products from the interior of the
lamp to the annular space and from thence to the exterior of the lamp. The lower
and open end of the inner cup is turned back and within the cup or a separate
conical piece is fitted upon the lower edge of the cup and caused to project within
the same to form a wind guard and a trough for the interception of any water that
may pass into the annular space during wet weather.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
3, Temple Street, Birmingham, Agents for the Applicant.
Improvements Relating to Cycle Lamps.
I, HARRY LUCAS, of the Firm of Joseph Lucas & Son, Manufacturers, of The
Tom Bowling Lamp Works, Little King Street, in the City of Birmingham, do hereby
5 declare the nature of this invention and in what manner the same is to be per-
[Price 8d.1

page_text: formed, to be particularly described and ascertained in and by the following
statement:
:
This invention consists of-improvements relating to cycle..lamps and especially to
lamps having a diagonally divided spherical body such as described in the Specifica-
tion of Letters Patent No. 23351 of 1896, my object being to arrange the side glasses
or windows in a more efficient manner, and to provide a dome or chimney part that
shall perinit of the free escape of the gaseous products from the flame but effectually
prevent any down draught.
In the accompanying sheet of explanatory drawings to be hereinafter referred to.-
Figure 1 is a side elevation of a lamp, having my improvements applied thereto.
Figure 2 is an end view of the lamp with the dome or top part detached.
Figure 3 is an elevation with part in section, of the outer portion of the dome, and
Figure 4 a plan of the same.
Figure 5 is an elevation with part in section, of the inner portion of the dome, and
Figure 6 a plan of the same.
The same reference letters in the different views indicate the same parts.
I form each of the side glasses or windows for a lamp having a diagonally divided
body, from separate pieces or panes of glass preferably four in number as A, B, C, and
D, and of varying colour, fitting two of such panes as A, B, upon the one half and the
others, C, D, upon the opposite half of the diagonally divided body. At Figure 1 the
four panes on the one side of the lamp are seen whilst Figure 2 shows three of
the panes A, D, and C, on the one side, and three similar panes as A¹ D' and C¹ on the
opposite side. The panes are secured within frames or socket like pieces soldered or
otherwise rigidly attached to the lamp body or pressed out or formed from the metal
of such body. The pane apertures and the frames or retaining pieces are preferably
so arranged that when fitted in position upon the lamp they together form a window
partaking of the configuration of a Maltese cross as shown at Figure 1.
I construct the dome or top part of the lamp, which is shown detached at Figure 2,
from two metallic cup shaped pieces fitting the one within the other but with an
annular space as E between them. The upper and closed end of the outer cup which
is shown separately at Figures 3 and 4 is perforated to permit of the passage of a
current of air through the annular space E, as indicated by the arrows at Figure 2,
whilst the inner cup (shown separately at Figures, 5 and 6) is perforated to permit of
the escape of the hot air and gaseous products from the interior of the lamp to the
annular space and from thence to the exterior of the lamp. The lower and open end
of the inner cup is turned back and within the cup, or a separate conical piece (as F
Figure 5) is fitted upon the lower edge of the cup and caused to project within the
same to form a guard against wind and water that would otherwise pass from the
annular space to the interior of the lamp during stormy weather. The inner and
outer parts of the dome are secured together by small rivets which are passed
through the holes as e in the closed ends of such parts which are placed adjacent to
each other as shown at Figure 2.
The complete dome or top or chimney part is secured to the upper end of the body
of the lamp, preferably by a bayonet like joint or connection consisting of small pro-
jections as f from the inner portion of the dome which engage with grooves as g on
the said upper end of the body.
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. The formation and arrangement of the side glasses or windows of a cycle lamp
from separate panes or pieces of glass, substantially as described.
2. The construction of the dome or chimney part of a cycle lamp from cup shaped
pieces arranged and secured the one within the other, substantially as and for the
purposes described.

page_text: 3. A cycle lamp having improved parts arranged in combination therewith, sub-
stantially as described and as illustrated.
TEL
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.