Improvements in Globes for Electric Glow Lamps.
Year: 1895

page_text: Date of Application, 14th Feb., 1895
'Complete Specification Left, 10th Apr., 1895-Accepted, 11th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Globes for Electric Glow Lamps.
We, VICTOR DE SPRUNER-MERTZ and JOSEPH KOCH both of Rue du
Marché 58 Brussels in the Kingdom of Belgium, Manufacturers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to the construction of globes for electric glow lamps in
such a manner as to render external reflectors unnecessary, part of the globe itself
constituting a reflector and effectively diffusing the light.
For this purpose, the globe is made with its lower part transparent, and with its
upper part rendered reflective by silvering or otherwise. Various shapes of globes,
thus constructed, are shewn in the accompanying drawing, those having the upper
parts shaped as inverted funnels being generally preferable.
Instead of making the globes in oue piece, the upper parts may be separate, and
in that case may be of bright metal, attached to the glass part below.
Dated this 14th day of February 1895.
ABEL & IMRAY,
Agents for the Applicants.
Improvements in Globes for Electric Glow Lamps.
We, VICTOR DE SPRUNER-MERTZ and JOSEPH KOCH, both of Rue du
Marché 8 Brussels in the Kingdom of Belgium, Manufacturers, 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 improvements in globes for electric glow-lamps, and it
has for its object firstly to do away with all descriptions of separate reflectors for
such lamps, the globe itself forming the reflector, and secondly to considerably
amplify and diffuse the illuminating power of the lamp.
For this purpose we divide the globe into two parts, of which the lower part
remains transparent being of glass, mica or other suitable material and can have
any desired configuration (certain forms however giving better results than others),
the increase of the illuminating power being produced by the combination of these
forms with the reflecting part.
The other part is rendered bright or reflecting by the ordinary processes of
silvering, gilding nickel plating &c. This upper part can also be made of various
forms, but practically the conical or inverted funnel form has been found to give
the best results.
The globes may either be made of a single piece, of glass, mica or other suitable
transparent material, or of two or more separate parts. The upper reflecting part
may be made either of glass, mica &c. or of metal, such as zinc, sheet-iron &c. and
the lower part may be tinted. On the drawing accompanying our Provisional
Specification we have shewn various forms of globes constructed according to this
invention

page_text: The upper part may be rendered bright or reflecting either externally or
internally.
Instead of forming the whole of the upper part of the globe as a reflector, part
or parts thereof may be left transparent, so as to throw a certain amount of light
upward or sideways, such transparent portions being either in the form of circular
bands or of circular or other openings in the reflecting coating.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A globe for electric glow lamps divided into two or more parts of which the
lower part remains transparent while the upper part is of conical form and is
rendered bright so as to constitute a reflector, substantially as described.
2. A globe for electric glow lamps formed either wholly of glass, mica, or other
suitable transparent material, or of two or more different materials such as glass
and sheet iron, mica and zinc, such globes having their upper parts prepared to
serve as reflectors, substantially as described.
ABEL & IMRAY,
Agents for the Applicants.