IMPROVEMENTS IN CARBONS FOR INCANDESCENT ELECTRIC LAMPS."
Year: 1882

page_text: LETTERS PATENT to Mark Bailey of Argyle Square Kings Cross in the
County of Middlesex for an Invention of "IMPROVEMENTS IN CARBONS FOR
INCANDESCENT ELECTRIC LAMPS."
PROVISIONAL SPECIFICATION left by the said Mark Bailey at the Office
of the Commissioners of Patents on the 21st October 1882.
→
.
MARK BAILEY of Argyle Square Kings Cross in the County of Middlesex
"IMPROVEMENTS IN CARBONS FOR INCANDESCENT ELECTRIC LAMPS
My Invention relates to Improvements in Carbons for Incandescent Lamps.
In carrying out my Improvements I do not use the filament as used in Lamps
as ordinarily constructed which filament through its frailty is so liable to be
damaged consequently rendering the light uncertain.
My said Invention consists in making the carbon of a tubular shape with a
hollow globe in its centre which is pierced around its circumference the wires for
conducting the electric current being fixed to the sides or ends of the said carbon
the electric light being produced through the bars or partitions formed by the
piercing of the globular part of the carbon by means of which it is formed into &
lantern.
In my improvements I do not limit myself to a tubular and globular or any
other particular shape for the carbon nor to its size as by varying its size-I can
vary the power of the light nor do I bind myself to the material of which I make
the Carbons. By my Improvements the manufacture is simplified and the
durability is increased whereby a more efficient lamp is obtained.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Mark Bailey in the Great Seal Patent Office on the 21st April
1883.
MARK BAILEY of Argyle Square King's Cross in the County of Middlesex
"IMPROVEMENTS IN CARBONS FOR INCANDESCENT ELECTRIC LAMPS"
My Invention relates to Improvements in Carbons for Incandescent Electric
Lamps.
In carrying out my improvements I do not use the filament as used in lamps as
ordinarily constructed which filament through its frailty is so liable to be damaged
consequently rendering the light uncertain.
My said Invention consists in making the Carbon of a tubular shape with a
hollow or perforated Globe or enlarged part in its centre as illustrated (drawn to an
enlarged scale) in elevation in Figure 1 and in section in Figure 2 of the accom-
panying Drawings the said Globe or enlarged part being pierced around its
circumference by the perforations a a. The wires for conducting the Electric
current are fixed to the sides or ends of the said Carbon as shewn in Figure 3
which represents a lamp provided with my improved Carbon. The Electric light
is produced through the bars or partitions b b formed by the perforations a a of
the Globular part of the Carbon by means of which it is formed into a Lantern.
I do not limit myself to the exact shape of the Carbons shewn in the drawings
provided that it is formed substantially as described nor do I limit myself to its
size as by varying its size I can vary the power of the light nor do I bind myself
to the material of which I make the Carbons. By my Improvements the manufacture
is simplified and the durability is increased whereby a more efficient Lamp is
obtained.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the Invention secured 'to me by the hereinbefore in part
recited Letters Patent is :-
The Carbon for incandescent Electric lamps constructed or formed substantially
as hereinbefore described and illustrated in the accompanying drawing.
In witness whereof I the said Mark Bailey have to this my Specification set
my hand and seal this twentieth day of April One thousand eight hundred
and eighty three.