Improvements in Globes or Glasses for Incandescent Gas Lamps.
Year: 1896

page_text: Date of Application, 11th Apr., 1896
Complete Specification Left, 25th June, 1896-Accepted, 25th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in Globes or Glasses for Incandescent Gas Lamps.
We, S. P. CATTERSON AND SONS LIMITED of the Globe Lamp Works,
Newington Causeway in the County of London, Lamp Manufacturers and
WILLIAM PRINCE CATTERSON of the same place, Lamp Manufacturer, do hereby,
declare the nature of this invention to be as follows:-
Hitherto the globes or glasses for incandescent gas lamps have been made in one
piece and consequently only one description or kind of glass has generally been
employed in one and the. same globe. Globes have it is true been sometimes made
or blown in one piece with two kinds of glass one forming the upper part and the
other the lower part, but these are expensive because of the difficulty of blowing..
or making them with a clean uniform connection and the consequent necessity
of employing specially skilled workmen.
Now according to this invention we make globes or glasses for incandescent gas,
lamps in two pieces the lower of which fits into the gallery or lamp in the usual
way while the upper piece fits upon the lower. The lower piece may for example
be of pressed glass and the upper piece of moulded glass and one piece may be of
clear or crystal glass and the other piece of opal or colored glass, and either or
both of them may be fluted, striated or otherwise similarly formed or have any
desired ornamental figures or designs thereon.
In practice we prefer to make the lower piece of pressed clear glass of any
desired colour and having any desired prismatic or other design thereon so as to
distribute and increase the effect of the light, while we make the upper piece of
opal or other semi-opaque glass of any desired color so as to reflect the light
downwards.
The globes may be of round, square or other shape.
Our invention gives almost unlimited scope for variation in the globes and as
each piece is made separately and the two pieces do not require to be permanently
joined they can be very cheaply made.
Dated this 11th day of April 1896.
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Globes or Glasses for Incandescent Gas Lamps.
We, S. P. CATTERSON AND SONS LIMITED of the Globe Lamp Works,
Newington Causeway in the County of London, Lamp Manufacturers and
WILLIAM PRINCE CATTERSON of the same place, Lamp Manufacturer, 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:-
Hitherto the globes or glasses for incandescent gas lamps have been made in one
piece and consequently only one description or kind of glass has generally been

page_text: employed in one and the same globe. Globes have it is true been sometimes made
or blown in one piece with two kinds of glass one forming the upper part and the
other the lower part, but these are expensive because of the difficulty of blowing
or making them with a clean uniform connection and the consequent necessity of
employing specially skilled workmen.
Now according to this invention we make globes or glasses for incandescent gas
lamps in two pieces the lower of which fits into the gallery or lamp in the usual
way while the upper piece fits upon the lower. The lower piece may for example
be of pressed glass and the upper piece of moulded glass and one piece may be of
clear or crystal glass and the other piece of opal or colored glass, and either or
both of them may be fluted, striated or otherwise similarly formed or have any
desired ornamental figures or designs thereon.
In practice we prefer to make the lower piece of pressed clear glass of any
desired color and having any desired prismatic or other design thereon so as to
distribute and increase the effect of the light while we make the upper piece of
opal or other semi-opaque glass of any desired color so as to reflect the light
downwards.
The globes may be of round, square or other shape.
Our invention gives almost unlimited scope for variation in the globes and as
each piece is made separately and the two pieces do not require to be permanently
joined they can be very cheaply made.
The accompanying drawings illustrate the invention :---
Figure 1 is an elevation showing one example of our globes or glasses applied to
an incandescent gas lamp.
Figures 2 and 3 are central vertical sections of the upper and lower pieces or
parts respectively.
a is the lower piece which may be of for example pressed glass, crystal or
clear. b is the upper piece which may be for example of moulded glass, opal
or colored. The piece a fits into the gallery c of the lamp and the piece b fits
upon the piece a and is prevented from falling off by the flange or lip d at
bottom, entering the upper part of a.
Figures 4, 5 and 6 are views corresponding respectively with Figures 1, 2
and 3 showing another example of our globes or glasses.
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 manufacture of globes or glasses for incandescent gas lamps in two picces,
the lower of which is adapted to fit into the lamp and the upper of which fits into
the lower, substantially as and for the purpose hereinbefore described.
Dated this 22nd day of June 1896.
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.