IMPROVEMENTS IN CARBONS FOR INCANDESCENT ELECTRIC LAMPS
Year: 1883

page_text: LETTERS PATENT to James Wavish of Forest Gate in the County of Essex
and John Warner of Whitechapel in the County of Middlesex for an
Invention of "IMPROVEMENTS IN CARBONS FOR INCANDESCENT ELECTRIC
LAMPS
บ
PROVISIONAL SPECIFICATION left by the said James Wavish and Johu
Warner at the Office of the Commissioners of Patents on the 2nd January
1883.
JAMES WAVISH of Forest Gate in the County of Essex and JOHN WARNER
of Whitechapel in the County of Middlesex "IMPROVEMENTS IN CARBONS FOR
INCANDESCENT ELECTRIC LAMPS
"
Our Invention relates to improvements in Carbons for incandescent Electric
Lamps and has for its object to provide an efficient substitute for the carbon
filament at present employed in. Lamps of this class
According to our said Invention we form the Carbons of a short rod or piece of
Carbon having thickened ends that is to say formed with a turned down or
reduced central portion. A central hole or perforation penetrates the said Carbon
lengthwise and in the aforesaid turned down or reduced central portion transverse
perforations or long slots are made communicating with the said central hole The
terminal wires are or may be connected to the improved Carbon at the ends
thereof and the said Carbon may be used in an exhausted bulb or globe such as is
used with ordinary incandescent Lamps

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Wavish and Jolin Warner in the Great Seal Patent Office on
the 2nd July 1883.
JAMES WAVISH of Forest Gato in the County of Essex and JOHN WARNER
of Whitechapel in the County of Middlesex "IMPROVEMENTS IN CARBONS FOR
INCANDESCENT ELECTRIC LAMPS
"
Our Invention relates to Improvements in carbons for incandescent electric
lamps and has for its object to provide an efficient substitute for the carbon
filament or filaments at present employed in lamps of this class.
According to our said Invention we form the carbons of a short rod or piece of
carbon having thickened ends that is to say, formed with a turned down or
reduced central portion. A central hole or perforation penetrates the said Carbon
lengthwise and in the aforesaid turned down or reduced central portion transverse
perforations or long slots are made communicating with the said central hole.
The terminal wires are or may be connected to the improved Carbon at the ends
thereof and the said Carbon may be used in an exhausted bulb or globe such as is
used with ordinary incandescent lamps
And in order that the said Invention may be fully understood we will now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 represents in side elevation, Figure 2 in central transverse section, and
Figure 3 in longitudinal section, a carbon made in accordance with our Invention-
The said carbon consists of a short rod or piece having thickened ends a and a
turned down or reduced central part b. A central hole c penetrates the said carbon
lengthwise and in the part b transverse perforations or long slots of any suitable
form are made communicating with the said central hole c. In figures 1, 2 and 3
these perforations are shewn in the form of long slots d having bars e between
them. Figure 4 shews transverse perforations in the form of circular holes f. The
terminal wires may be connected to the carbon by fastening them into the central
perforation c. The said carbon may be used singly or in any suitable number in
an exhausted bulb or globe such as is used with ordinary incandescent lamps.
Figure 5 illustrates the application of one carbon and Figure 6 that of two
carbons; but any convenient number and arrangement of the said carbons may be
adopted.
Having now described and particularly ascertained the nature of our said
Invention and the manner in which the same is or may be used or carried
into effect, we would observe in conclusion that what we consider to be novel and
original and therefore claim as the Invention secured to us by the hereinbefore in
part recited Letters Patent is :—
Carbons for Incandescent Electric lamps constructed or formed substantially as
herein before described.
In witness whereof we the said James Wavish and John Warner have to
this our Specification set our hands and seals this twenty fifth day of June
in the year of our Lord One thousand eight hundred and eighty three.