Improvements in the Gas Igniting Arrangements of Incandescence Gas Lamps.
Year: 1896

page_text: Date of Application, 13th Feb., 1896
Complete Specification Left, 13th Nov., 1896-Accepted, 13th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Gas Igniting Arrangements of Incandescence
Gas Lamps.
We, JEAN MICHEL CANELLOPOULOS, of 37 Boulevard Magenta, Paris, France,
Chemist, and HENRI OTHON KRATZ-BOUSSAC, of 3 Rue St. Laurent, Paris aforesaid,
Engineer, do hereby declare the nature of this invention to be as follows:-
Incandescence gas lamps are sometimes provided with igniters comprising
bodies so composed and prepared that when gas such as ordinary illuminating gas
in presence of air is caused to come in contact with such bodies ignition results, and
this invention has reference to lamps so provided. Heretofore it has been usual to
so locate the said bodies in the lamp that they have been exposed to occasional or
to constant action of the flame when the lamp has been burning, and this arrangement
is open to serious objection owing to deposit taking place and the pores of the
material constituting the main part of the body becoming choked thereby rendering
the prepared body liable after a time to become more or less inefficient or inoperative
as a means of causing ignition of the gas when required. Moreover when, as is
sometimes the case, a small platinum wire is also provided it is liable to gradually
vaporize. Now this invention is designed to obviate the foregoing disadvantages.
For this purpose the igniting device is so arranged as not to be exposed to the action
of the lamp flame and the supply of gas thereto is controlled by a valve, the opening
and closing movements of which are effected by contraction and expansion, caused by
changes of temperature, of a suitable solid, liquid or gaseous body. The arrange-
ment is such that when the lamp is not burning, the valve will be in its open
position so that on opening the main gas cock, a jet of gas will impinge on the
igniting body and by its ignition will ignite the main supply of gas issuing from
the lamp burner the heat of which will then cause the expansion body to close the
valve and cut off the supply of gas to the igniting body, and on the lamp being
put out of use, the said body will contract and open the valve thereby permitting
the igniting device to again act when the lamp is to be relighted. A valve with
means for closing it by expansion and contraction of a suitable body as set forth can
be constructed in various forms.
According to one arrangement the Bunsen burner or a union connected to it
is provided with a lateral pipe or by-pass having a small bore and terminating in and
at one side of and above the outlet of which the igniting body is fixed. Above the
said outlet and coaxial therewith is a rod of suitable metal, for example nickel that
extends through the lamp chimney to which its upper end is suitably attached
whilst its lower end is adapted to serve as a valve and terminates above the said
outlet. When the lamp is not burning the valve is at a short distance above the
outlet so that it will direct gas issuing therethrough against the igniting body, and
after ignition of the gas, the rod will expand and close the valve thus cutting off
the supply of gas through the by-pass until the lamp is put out of use when it will
contract and again open the valve.
In a modified arrangement, the valve is carried by a lever under the control of
the rod.

page_text: COMPLETE SPECIFICATION.
Improvements in the Gas Igniting Arrangements of Incandescence
Gas Lamps.
We, JEAN MICHEL CANELLOPOULOS, of 37 Boulevard Magenta, Paris, France,
Chemist, and HENRI OTHON KRATZ-BOUSSAC, of 3 Rue St. Laurent, Paris aforesaid,
Engineer, 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 :-
Incandescence gas lamps are sometimes provided with igniters comprising bodies
so composed and prepared that when gas such as ordinary illuminating gas in
presence of air is caused to come in contact with such bodies ignition results, and this
invention has reference to lamps so provided. Heretofore it has been usual to so
locate the said bodies in the lamp that they have been exposed to occasional or to
constant action of the flame when the lamp has been burning, and this arrangement
is open to serious objection owing to deposit taking place and the pores of the
material constituting the main part of the body becoming choked thereby rendering
the prepared body liable after a time to become more or less inefficient or
inoperative as a means of causing ignition of the gas when required. Moreover,
when, as is sometimes the case, a small platinum wire is also provided it is liable
to gradually vaporize. Now this invention is designed to obviate the foregoing
disadvantages. For this purpose the igniting device is so arranged as not to be
exposed to the action of the lamp flame and the supply of gas thereto is controlled
by a valve, the opening and closing movements of which are effected by contraction
and expansion, caused by changes of temperature, of a suitable solid, liquid or gaseous
body. The arrangement is such that when the lamp is not burning, the valve will
be in its open position so that on opening the main gas cock, a jet of gas will
impinge on the igniting body and by its ignition will ignite the main supply of
gas issuing from the lamp burner the heat of which will then cause the expansion
body to close the valve and cut off the supply of gas to the igniting body, and on
the lamp being put out of use, the said body will contract and open the valve thereby
permitting the igniting device to again act when the lamp is to be relighted.
A valve with means for closing it by expansion and contraction of a suitable body
as set forth can be constructed in various forms.
According to the arrangement illustrated the Bunsen burner a (or it might be the
union connected to it) is provided with a lateral pipe or by-pass 6 having a small
bore and terminating in an outlet c at one side of and above which the igniting
body d is fixed. Above the said outlet and co-axial therewith is a rod e of suitable
metal, for example nickel, that extends through the lamp chimney f to which its
upper end is attached say by a screw clamp g as shewn whilst its lower end h
is adapted to serve as a valve and terminates above the outlet c. When the lamp
is not burning the valve is at a short distance above the outlet as shewn so that
it will direct gas issuing therethrough against the igniting body d, and after ignition
of the gas, the rod will expand and close the valve thus cutting off the supply of
gas through the by-pass until the lamp is put out of use when it will contract and
again open the valve.
In a modified arrangement, the valve is carried by a lever under the control of
the rod.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is―
1 A
11

page_text: igniting device of the kind hereinbefore referred to is so arranged as not to be
exposed to the action of the lamp flame and the supply of gas to such device is
controlled by a valve the opening and closing movements of which are effected by
contraction and expansion of a suitable body, the arrangement being such that when
the lamp is not burning, the valve will be in its open position so that on turning on
the main gas cock, a jet of gas will impinge on the igniting body, and by its
ignition, will ignite the main supply of gas issuing from the lamp burner heat from
which will then cause the said body to expand and close the valve and cut off the
supply of gas to the igniting body, substantially as described.
2. Our improved igniting arrangements for incandescence gas lamps, constructed
arranged and operating substantially as described and shown.
Dated this 13th day of November 1896.
For the Applicants,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.