IMPROVEMENTS IN CONNECTING THE ENDS OF THE CARBON TO THE CONDUCTING WIRES IN ELECTRIC LAMPS
Year: 1881

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME We THE EDISON
ELECTRIC LIGHT COMPANY of London LIMITED send greeting
WHEREAS Her most Excellent Majesty Queen Victoria by Her Royal Letters
Patent under the Great Seal of Great Britain and Ireland bearing date at
Westminster the Twenty third February in the year of our Lord One thousand
eight hundred and eighty one in the forty fourth year of Her reign did for
Herself Her heirs and successors give and grant unto Edward Griffith Brewer
of 33 Chancery Lane in the County of Middlesex his executors administrators or
assigns especial license full power sole privilege and authority that he the said
Edward Griffith Brewer his executors administrators or assigns and every of them
by himself and themselves or by his and their deputy or deputies servants or
agents or such others as he his executors administrators or assigns should at any
time agree with and no others from time to time and at all times thereafter
during the term therein expressed should and lawfully might make use exercise
and vend within the United Kingdom of Great Britain and Ireland the Channel
Islands and Isle of Man an Invention of "IMPROVEMENTS IN CONNECTING THE
ENDS OF THE CARBON TO THE CONDUCTING WIRES IN ELECTRIC LAMPS "
communication from abroad by Thomas Alva Edison of Menlo Park in the State
of New Jersey United States of America for and during the term of fourteen years
thence next ensuing And whereas in pursuance and performance of a proviso in
the said Letters Patent contained the said Edward Griffith Brewer did within six
calendar months next after the date of the said Letters Patent cause a Specification
in writing under his hand and seal purporting to particularly describe the nature
of the said Invention and in what manner the same was to be performed to be duly
filed in the Great Seal Patent Office And whereas by Indenture bearing date the
ID

page_text: sixth day of April One thousand eight hundred and eighty two and made between
the said Thomas Alva Edison of the first part the said Edward Griffith Brewer of
the second part Peter Jensen of the third part Anthony J
Drexel
J
Pierpoint Morgan Egisto Paolo Fabbri and J
Hood Wright
of the fourth part Egisto Paolo Fabbri and Grosvenor Porter Lowry of the fifth
part and the Edison Electric Light Company of the sixth part the said Edward
Griffith Brewer as trustee with the convenience and by the direction of the said
parties thereto of the first fourth and fifth parts as beneficial owners granted and
assigned and the said parties thereto of the first fourth and fifth parts as beneficial
Owners thereby assigned and confirmed to the said Company their successors and
assigns the herein before recited Letters Patent and the full and exclusive benefit
and advantages thereof And whereas since the date of the said assignment we have
been advised that the first claim of the said Specification effectually covers
the Invention the subject of the said Letters Patent and that claims Nos. 2
and 3 are unnecessary and may be held to be misleading and that claim
No. 4 is for a detail which is not a necessary part of the said Invention NOW
KNOW YE that we the Edison Electric Light Company by and with the
leave of Her Majesty's Solicitor General and for the reasons aforesaid do alter and
amend the said Specification in manner following that is to say-We strike out
of the Specification printed by the Queens Printers and published at the Great Seal
Patent Office in One thousand eight hundred and eighty one the word "first"
which occurs in line 4 of page 4 and we also strike out the whole of the second
third and fourth claiming clauses of the said Specification and in order that the
effect of the Disclaimer and Memorandum of Alteration as aforesaid may be clearly
understood we annex hereto a copy of the said Specification as it will appear when
so altered and amended the preamble and testing clause being omitted
希望
As it is now well known the lamp shewn in several British Patents granted to
said Edison consists of a filament of carbon hermetically sealed in a glass globe
from which the atmospheric air has been exhausted In such the carbon filament
is electrically connected to the conducting wires passing through and sealed into
the glass by means of delicate clamps attached to the wires and receiving
supporting and forming a good electrical contact with the ends of the carbon
The Invention in this case relates to the connection of the wires and the carbon
filament and is intended as a substitute for the clamps referred to
It consists in uniting the carbon to the wires in any suitable manner and then
electroplating the point of union thereby making permanent the union and at the
same time making the perfect electrical contact between the two.
The union of the carbon filament and the wires in the first instance may be
accomplished in several ways. For instance the end of the wire may be slightly
flattened and then split the end of the carbon filament inserted in the forked
opening the sides thereof pressed down upon the carbon filament and the place of
union then plated with any suitable metal the deposited metal serving to hold the
split ends in position upon the carbon filament preventing it from loosening
therefrom and securing a good electrical connection between the wire and the
carbon.
If preferred the wire may be given a turn or two around the end of the filament
and then the union plated or the wire may be laid against the carbon and secured
thereto by a wrapping of fine wire the union being then plated with the same
results as stated in the first instance Or any other suitable method of uniting the
wire and the filament in the first instance may be used the essential feature
being that the point of union be then plated to secure the results hereinbefore set
forth.
In the Drawing is illustrated suitable means for carrying the Invention into
effect in which G represents a depositing cell made open at the bottom a rubber
or other suitable stopper F being used to close the orifice. E is a supporting tube
to receive the conducting wires 1.2 which are sealed therein the tube being

page_text: provided with the enlargement D for sealing into the neck of the enclosing globe
of the lamp.
At their upper ends the wires 1. 2. are secured to the carbon C at the enlarged
or clamping ends c c by any desirable means say as first described by flattening
and splitting the ends 1. 2 and inserting the ends cc in the forks so formed the
sides being then pressed down upon c c The tube E is passed through an aperture
in the stopple F until the point of union is just covered by the plating solution in
Gas shewa in the Drawing. Connections 3. 4 are then made to the wires 1. 2
and to the plate A from any suitable source of electricity a battery B being for
case of illustration shown in the Drawing the plate A forming the anode and the
ends cc the cathode of the depositing cells. It is to be noted that the portions of
the wires 1, 2. below the ends c c are to be covered with varnish wax or other
substance preventing deposition thereon. The plating is to be allowed to proceed
upon cc until the wires are thoroughly secured thereto.
What is claimed is.-
The method of uniting the carbon filament and conducting wires thereto in an
electric lamp consisting in first uniting them mechanically in any ordinary manner
and then securing the union by electro plating thereon substantially as set forth.
Limited .
A
In witness whereof the Edison Electric Light Company of London have
caused their common seal to be hereunto affixed this Second day of June
One thousand eight hundred and eighty two.
ANSON
Notice of the application for leave to file this Disclaimer and Memorandum of
Alteration having been advertised in accordance with my directions
I hereby grant my fiat giving leave to the above named Edison Electric Light
Company Limited (the assignees and now legal and equitable owners of the above
recited Letters Patent) to file in the Great Seal Patent Office with the Specifi-
cation to which the same relates the above written Disclaimer and Memorandum
of Alteration.

page_text: LETTERS PATENT to Edward Griffith Brewer, of 33, Chancery Lane, in the
County of Middlesex, for an Invention of "IMPROVEMENTS IN CONNECTING
THE ENDS OF THE CARBON TO THE CONDUCTING WIRES IN ELECTRIC LAMPS."
A communication from abroad by Thomas Alva Edison, of Menlo Park, in the
State of New Jersey, United States of America.
«
PROVISIONAL SPECIFICATION left by the said Edward Griffith Brewer
at the Office of the Commissioners of Patents on the 23rd February 1881.
EDWARD GRIFFITH BREWER, of 33, Chancery Lane, in the County of Middlesex.
IMPROVEMENTS IN CONNECTING THE ENDS OF THE CARBON TO THE CONDUCTING
WIRES IN ELECTRIC LAMPS." A communication from abroad by Thomas Alva
Edison, of Menlo Park, in the State of New Jersey, United States of America.
As is now well known said Edison's lamp consists of a filament of carbon in an
hermetically sealed glass globe from which the atmospheric air has been exhausted.
In such the carbon filament is electrically connected to the conducting wires, passing
through and sealed into the glass by means of delicate clamps attached to the
wires, and receiving, supporting, and forming a good electrical contact with the
ends of the carbon.
The present Invention relates to the connection of the wires and the carbon
filament, and is intended as a substitute for the clamps referred to.
It consists in uniting the carbon to the wires in any suitable manner, and then
electro-plating the point of union, thereby making permanent the union and at
the same time making perfect electrical contact between the carbon and the
conductors.
The union of the carbon filament and the wires in the first instance may be
accomplished in several ways.
For instance, the end of the wire may be slightly flattened and then split, the
end of the carbon filament inserted in the forked opening, the sides thereof pressed
[Price 6d1

page_text: down upon the carbon filament, and the place of union then plated with any
suitable metal, the deposited metal serving to hold the split ends in position upon
the carbon filament, preventing it from loosening therefrom, and securing good
electrical connection between the wire and the carbon.
If preferred, the wire may be given a turn or two around the end of the
filament, and then the union plated, or the wire may be laid against the carbon,
and secured thereto by a wrapping of fine wire, the union being then plated with
the same results as stated in the first instance.
Or any other suitable method of uniting the wire and the filament in the first
instance may be used, the essential feature being that the point of union be then
plated to secure the results hereinbefore set forth.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Griffith Brewer in the Great Seal Patent Office on the
23rd August 1881.
EDWARD GRIFFith Brewer, of 33, Chancery Lane, in the County of Middlesex.
IMPROVEMENTS IN CONNECTING THE ENDS OF THE CARBON TO THE CONDUCTING
WIRES IN ELECTRIC LAMPS." A communication from abroad by Thomas Alva
Edison, of Menlo Park, in the State of New Jersey, United States of America.
As is now well known the lamp shown in several British Patents granted to said
Edison consists of a filament of carbon hermetically sealed in a glass globe from
which the atmospheric air has been exhausted. In such the carbon filament is
electrically connected to the conducting wires, passing through and sealed into the
glass by means of delicate clamps attached to the wires, and receiving, supporting,
and forming a good electrical contact with the ends of the carbon.
The Invention in this case relates to the connection of the wires and the carbon
filament, and is intended as a substitute for the clamps referred to.
It consists in uniting the carbon to the wires in any suitable manner and then
electroplating the point of union, thereby making permanent the union, and at the
same time making the perfect electrical contact between the two..
The union of the carbon filament and the wires in the first instance may be
accomplished in several ways. For instance, the end of the wire may be slightly
flattened and then split, the end of the carbon filament inserted in the forked
opening, the sides thereof pressed down upon the carbon filament, and the place of
union then plated with any suitable metal, the deposited metal serving to hold the
split ends in position upon the carbon filament, preventing it from loosening
therefrom, and securing good electrical connection between the wire and the
carbon.
If preferred the wire may be given a turn or two around the end of the filament,
and then the union plated; or the wire may be laid against the carbon and secured
thereto by a wrapping of fine wire, the union being then plated with the same
results as stated in the first instance. Or any other suitable method of uniting the
wire and the filament in the first instance may be used, the essential feature being
that the point of union be then plated to secure the results hereinbefore set
forth.
In the Drawing is illustrated suitable means for carrying the Invention into
effect, in which G represents a depositing cell made open at the bottom, a rubber or
other suitable stopple F being used to close the orifice; E is a supporting tube to
receive the conducting wires 1, 2, which are sealed therein, the tube being
provided with the enlargement D for sealing into the neck of the enclosing globe
of the lamp.
At their upper ends the wires 1, 2, are secured to the carbon C at the enlarged or
clamping ends c, c, by any desirable means, say, as first described, by flattening and
splitting the ends of 1, 2, and inserting the ends c, c, in the forks so formed, the
sides being then pressed down upon c, c. The tube E is passed through an aperture
n the stopple F until the point of union is just covered by the plating solution
n G, as shown in the Drawing. Connections 3, 4, are then made to the wires 1, 2,
and to the plate A from any suitable source of electricity, a battery B being for
ase of illustration shown in the Drawing, the plate A forming the anode; and the
nds c, c, the cathode of the depositing cells. It is to be noted that the portions of
he wires 1, 2, below the ends c, c, are to be covered with varnish, wax, or other

page_text: substance preventing deposition thereon. The plating is to be allowed to proceed
upon c, c, until the wires are thoroughly secured thereto.
What is claimed is,--
First. The method of uniting the carbon filament and conducting wires thereto
in an electric lamp, consisting in first uniting them mechanically in any ordinary -
manner, and then securing the union by electro-plating thereon, substantially as
set forth.
Second. The combination of a carbon filament, the conducting wires leading
thereto, and an electroplated union or joint, substantially as set forth.
Third. An incandescent electric lamp in which the union of the incandescing
carbon conductor and the conducting wires leading thereto is secured and perfected
by an electro-plated union or joint, substantially as set forth.
Fourth. An electro-plating cell provided with a perforated bottom for receiving
the support of the article to be plated, so that the point of plating may be
controlled, substantially as set forth.
In witness whereof, I, the said Edward Griffith Brewer, have hereunto set
my hand and seal, this Twentieth day of August, in the year of our Lord
One thousand eight hundred and eighty one.
G. BREWER.
ATT
(L.D.)