Improvements in Incandescence Electric Lamps.
Year: 1889

page_text: Date of Application, 23rd Dec., 1889
Complete Specification Left, 22nd Sept., 1890-Accepted, 23rd Dec. 1890
PROVISIONAL
SPECIFICATION.
Improvements in Incandescence Electric Lamps.
We, JOHN WIGHAM EDMUNDSON, and WILLIAM CLARKE, both of the Sunbeam.
Lamp Works, Gateshead-on-Tyne, in the County of Durham, Engineers, do hereby
declare the nature of this invention to be as follows:-
In order to cheapen the manufacture of incandescence electric lamps, especially of
the larger types, in lieu of attaching the carbon rods or filaments to platinum wires
by a deposit of carbon, electro-typing or other process as heretofore has been usual,
the carbon rod or filament is according to this invention connected directly with a
nickel wire or strip that can be attached either directly to platinum or nickel wires
which pass through the glass of the lamp or to iron wires or rods that are in turn
attached to the platinum or nickel wires which pass through the glass.
For the purpose of fusing the nickel wire into the glass without cracking it the
said wire is coated with borax or other suitable flux or with a thin coating of platinum,
Also we use nickel wire instead of platinum wire for making the fork or support at
the top of the lamp for preventing the vibration of the carbon in the manner
described in the Specification of Messrs. Clarke and Parsons No. 15118 A.D. 1887.
Dated this 23rd day of December 1889.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants
COMPLETE SPECIFICATION.
Improvements in Incandescence Electric Lamps.
We, JOHN WIGHAM EDMUNDSON of the Sunbeam Lamp Works, Gateshead-on-Tyne
in the County of Durham, Engineer, and MARGARET CLARKE, of Gateshead, Widow,
Executrix of the late Willian Clarke, 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 :-
In order to cheapen the manufacture of incandescence electric lamps, especially of
the larger types, in lieu of attaching the carbon rods or filaments to platinum wires
by a deposit of carbon, electro-typing or other process as heretofore has been usual,
the carbon rod or filament is according to this invention connected directly either
by a deposit of carbon, electro-typing or other process with nickel wires or strips that
can be attached either directly to platinum or nickel wires which pass through the
glass of the lamp, or to iron wires or rods that are in turn attached to the platinum
or nickel wires which pass through the glass. The connection between the wires
fused in the glass of the lamp and the lamp leads, may be effected by means of loops
of nickel.
For the purpose of fusing the nickel wires into the glass without cracking it,
the said wires are coated with borax or other suitable flux or with a thin coating of
platinum.
In the accompanying drawings,
Fig. 1 illustrates partly in elevation and partly in vertical section, an incandescence
lamp according to this invention in which the carbon rod or filament 1 is connected
at its ends by a deposit of carbon, electro-typing, or other process, to supports 2, 2,
of nickel wire or nickel strip, that are electrically connected to platinum wire or
wires 3, 3, that are fused into the glass of the lamp bulb or receiver 4, and project
outside the receiver to form the ordinary loops 5 for connection with the lamp leads.

page_text: The glass stems 6 are each made tubular at 7 so as to loosely fit the upper end of the
corresponding nickel support 2, and support the same laterally.
In the arrangement illustrated in Fig. 2 the nickel supports 2, 2, are connected to
wires 3ª 3ª of nickel that pass through the glass stems 6, these wires 3 previous to being
fused into the glass being coated with a suitable flux, as for example borax, or with a
thin coating of platinum, in order to prevent fracture of the glass stems on cooling.
The nickel wires 3" 3ª are made at their outer ends into loops 5 for attachment to the
lamp leads. In the arrangement illustrated in Fig. 3, the carbon rod or filament is
connected to supports 2, 2, of nickel wire, or nickel strip, that are in turn connected to
supports 2ª 2, of iron wire or iron rod, which are electrically connected to the
wires 3 3 fused through the glass of the receiver. These wires 3, 3, can be of
platinum as in Fig. 1 or they can be of nickel as in Fig. 2 in which case they must
previous to being fused into the glass stems, be coated with a flux or with platinum
as herein before stated. The loops 5 may, as before, be of nickel wire.
This invention is applicable to electric incandescence lamps containing more than
one carbon rod or filament.
Nickel wire can also be used instead of platinum wire for making the fork or
support for preventing the vibration of the carbon rod or filament in the manner
described in the Specification of Messrs. Clarke and Parsons No. 15118 A.D. 1887.
This is shown in Fig. 3 where 8 is the fork or support made of nickel.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is-
1. An incandescence electric lamp, in which the carbon rod or filament is connected
by wires of nickel or strips of nickel directly or through other wires or strips to the
wires that pass through the glass wall of the receiver.
2. The construction of an incandescence electric lamp with a carbon rod or
filament 1, nickel wires or nickel strips 2, and platinum wires 3 passing through the
glass wall of the receiver 4 as described with reference to Fig. 1 of the drawings.
3. The construction of an incandescence electric lamp, with
filament 1, nickel connecting wires or strips 2, and nickel wires 3 passing through
a carbon rod or
the glass wall of the receiver 4 as described with reference to Fig. 2 of the
drawings annexed.
4. The construction of an incandescence electric lamp, with a carbon rod or
filament 1, nickel connecting wires or connecting strips 2, iron rods or wires 2 and 3
wires 3 of platinum or of nickel passing through the glass wall of the receiver 4 às
described with reference to Fig. 3 of the drawings annexed,
5. In the manufacture of an incandescence electric lamp, making the conductors that
pass through the glass wall of the receiver of nickel wire and coating the same
with a suitable flux such as borax, or with a thin film of platinum before fusing
into the glass of the receiver substantially as herein described for the purpose
specified.
Dated this 20th day of September 1890.
JOHN WIGHAM EDMUNDSON.
W. Lloyd Wise,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.