Improvements in Glasses for Lamps and Lanterns.
Year: 1888

page_text: Date of Application, 24th Oct., 1888
Complete Specification Left, 24th July, 1889-Accepted, 14th Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Glasses for Lamps and Lanterns.
We, EDWIN FULLFORD, of London Road Clapton in the County of Middlesex,
Engineer, and HERRMANN COHN, of London Wall, in the City of London, Merchant,
do hereby declare the nature of this invention to be as follows:-
This invention relates to the transparent glasses used for the sides of lamps and
lanterns of different kinds, and it has for its object a novel shape and method of con-
struction of such glasses by which they are more durable and effective than the
glasses ordinarily used.
For this purpose we take glass of suitable quality, preferably flint glass, and we
press sheets or pieces of suitable size into rectangular or other shaped plates to fit the
frame of the lamp in which they are to be used. In the centre of the plate we form,
by pressure when the glass is in a soft, state, a curved concave raised part; the con-
cave side of which is arranged in the interior of the lamp next the flame or burner,
its convex side being outward. The amount of elevation of the raised part and its
shape may be varied more or less according to the shape, size and character, of the
lamp and the purposes for which it is to be used, such for instance as the side and
tail lamps of railway trains. The glass may if necessary be annealed after it is com-
pleted, and it may be provided with a projecting part at the top or side to facilitate
its introduction and removal. It may be of any colour.
By this invention the liability to breakage is greatly lessened, the glass being able
to expand sufficiently by heat in its curved raised part, and from its curved shape
greater illuminating power is obtained.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Glasses for Lamps and Lanterns.
We, EDWIN FULLFORD, of London Road, Clapton, in the County of Middlesex,
Engineer, and HERRMANN COHN, of London Wall, in the City of London, Merchant,
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 and accompanying drawing, (that is to say)
:-
This invention relates to the transparent glasses used for the sides of lamps and
lanterns of different kinds, and it has for its object a novel shape and method of con-
struction of such glasses by which they are more durable and effective than the
glasses ordinarily used for such purpose.
In order to put our invention in operation we take glass of suitable quality,
preferably flint glass, and we press sheets or pieces of suitable size into rectangular or
other shaped plates to fit the frame of the lamp in which they are to be used. In the
centre of the plate we form, by pressure when the glass is in a soft state, a curved
concave raised part, the concave side of which is arranged when the lamp or lantern
is in use, in the interior of the lamp next to the flame or burner, its convex side
being outward.
The accompanying drawing is in illustration of our invention, figure 1 being a
front view of a rectangular glass having a centre concave or raised in the manner
described. Figures 2 and 3 are vertical and transverse sections respectively of the
a represents the flat flange or body of the glass, and b the curved concave
raised part, formed by pressure as above described.
same.

page_text: The amount of elevation of the raised part and its shape may be varied more or less
according to the shape, size, and character of the lamp or lantern and the purposes
for which it is to be used, such for instance as the side and tail lamps of Railway
trains. The glass may if necessary be annealed after it is completed, and it may be
provided with a projecting part at the top or side to facilitate its introduction and
removal. It may be of any colour.
The glasses curved as described may be applied to the front or sides of stoves in
which lamps are used.
By this invention the liability to breakage is greatly lessened, the glass being able
to expand sufficiently by heat in its curved raised part, and from its curved shape
greater illuminating power is obtained.
Having now particularly described and ascertained the nature of our said Inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is :-
The method of forming the glasses of lamps or lanterns with a curved con-
cave raised part, substantially as and for the purpose described and shewn in the
drawing.
4th day of July 1809.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Patentees.