Improvements in Electric Incandescent Lamps.
Year: 1898

page_text: Improvements in Electric Incandescent Lamps.
We, VICTOR SAGLIER, Literary Man, and EDGARD DE MARÇAY, Manufacturer, both
of 28, Avenue de l'Opéra, Paris, France, 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:—
The object of this invention is to considerably increase the illuminating power of
incandescent lamps without increasing the outlay of electricity.
This result is obtained by making use of a central reflector of tinned glass or of any
other reflecting substance whatever or of any chemical composition with a basis of any
rare earth placed in the centre of the filaments.
This composition may either be natural or industrial and may be directly exposed
to the action of the filaments or it may be inclosed in a transparent tube.
In Fig. 1A is a hollow cylinder tinned on the inside but according to what has
been said above it may be replaced by any reflecting substance whatever or by a
chemical composition with a basis of rare earth obtained either naturally or industrially
and directly subjected to the action of the filaments, or enclosed in a transparent tube.
B is the filament which is rolled spirally around the central reflector A, care being taken
to prevent any point of contact between the filaments and the reflector.
The construction of this lamp as also that of the models which follow is absolutely
identical with the construction of lamps in use at present except that we introduce
the reflector with its filaments rolled around without their touching each other, before
closing the bulb or glass. Fig. 2 represents a lamp the reflector of which is prism-
shaped and Figure 3 shows a reflector in the form of a cross in which the filaments to
the number of two are placed in each of the angles formed by the cross.
Fig. 4 is an upward view of Fig. 3 in the direction of the arrow.
We have mentioned these different dispositions in order that our invention may be
understood but it is evident that we do not limit ourselves to those three models and
that we can vary infinitely those combinations of central reflector and that we can
also give to this reflector all the colors and combinations of colors which we think
right.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we
claim is:-
1. In an incandescent electric lamp a central reflector of tinned glass or of any other
reflecting substance or made of any chemical composition whatever with a base of rare
earth whether this composition is natural or industrial or whether said composition is
directly exposed to the action of the filaments or enclosed in a transparent tube, this

page_text: reflector being surrounded in any convenient way by the filament or filaments so as
to project and reflect the light of the said filaments.
2. In electric incandescent lamps a central reflector such as has been described and
claimed and capable of being of any color whatever or any combination of colors.
Dated this 20th day of June 1898.
A. H. REED,
Agent for Applicant.