Improvements in Electric Gas-lighting Apparatus.
Year: 1895

page_text: Date of Application, 15th Oct., 1895
Complete Specification Left, 8th July, 1896-Accepted, 8th Aug., 1896
PROVISIONAL SPECIFICATION.
Improvements in Electric Gas-lighting Apparatus.
1, JEAN JAHNSSON, Jeweller, of Regierungs-gaton, Stockholm, Kingdom of
Sweden, do hereby declare the nature of this invention to be as follows:-
In the Specification of Letters Patent No. 3085 of 1895, granted to me I have
described a lighter whereby the lighting or extinguishing of gas-burners is
effected by means of an electric current. Owing to the arrangements which I had
adopted, all the burners were imultaneou-ly lighted or extinguished.
In this arrangement there was a certain defect arising from the fact that in a
lower guide of each lighter a notch or cut of trifling depth was invariably followed
by a deeply cut notch, and rice narsa, in such manner that, when the arms of the
apparatus all occupied the shallow notches (i.., for lighting the burners) the
transmission of an electric current brought them all into the deep notches,
whereby, at once, all the burners are extinguished simultaneously. That might be
somewhat embarrassing, when it is requisite only to light or extinguish a portion
of the burners in a pipe-system.
This application relates to modifications which I have devised in the construction
of such lower guides of the said lighters, for the purpose of remedying the defect
which I have just pointed out.
Thus, in lieu of alternating, as before, the deep and shallow notches, I may,
alternate two or more shallow notches with a single deep one, or vice versa two
deep notches with one shallow notch; and, generally, I may alternate any number
of shallow notches with any number of deep notches, provided always that the
principle of the lighter subsists unchanged, riz.: that when an arm falls into a
shallow notch the gas is turned on to the burner, but when the same arm drops
into a deep notch the gas is entirely turned off.
Owing to the employment of this modification in the lower guides, it becomes
possible to extinguish or to light, at pleasure, a certain number of burners
belonging to the same pipe-system.
.
Thus, for example, if the lamp in any street are arranged in such manner that the
odd numbers 1, 3, 5, 7, ... etc., carry guides in which two deep notches alternate
with one single shallow noteb, and that the even numbers 2, 4, 6, 8, .
etc. carry
guides in which one single deep notch alternate with two other shallow notches, it
will be easily understood that, by passing a current through, the arins of
Nos. 1, 3, 5, 7,
te will fall again in a deep notch, while the arms of
Nos. 2, 4, 6, 8 etc. will fall again in one of the two other and shallow notches.
It follows therefrom that the burners 1, 3, 5, 7, ... etc. will be extinguished,
while the burners 2, 4, 6, 8. ..te. will remain alight. The despatch of a
second current will effect the extinction, subsequently, of the latter alternate
series, 2, 4, 6, 8. . . etc. and thus all the burners will have been extinguished ;
lastly, the transmission of a third electric current, will relight all the lamps of
both series.
The notches, instead of having a form like that of the letter M may resemble
a V or have any other suitable form.
Dated this 15th day of October 1805

page_text: Improvements in Electric Gas-lighting Apparatus.
1, JEAN JANSSON, Jeweller, of Regierungs-gaton, Stockholm, Kingdom of
Sweden, 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 the Specification of Letters l'atent No. 3085 of 1805, granted to me I have
described a lighter whereby the lighting or extinguishing of gas-burnors is
effected by means of an electric current. Owing to the arrangements which I had
adopted, all the burners were simultaneously lighted or extinguished.
In this arrangement there was a certain defect arising from the fact that in the
lower guide () of each lighter, a notch or cut of trifling depth was invariably
followed by a deeply cut notch, and vice versa, in such manner that, when the arms
of the apparatus all occupied the shallow notches (ie. for lighting the burners) the
transmission of an electric current brought them all into the deep notches,
whereby, at once, all the burners are extinguished simultaneously. That might be
somewhat inconvenient, when it is requisite to light or extinguish only a portion of
the hurners in a pipe-system.
This application relates to modifications which I have devised in the construction
of such lower guides of the said lighters, for the purpose of remedying the defect
which have just pointed out.
The accompanying drawings represents, by way of example one of these lower
guides, to which my improvement has been applied.
Thus, in lieu of alternating, as before, the deep and shallow notches (i) (k),
may, as here shown, alternato 2 or more shallow notches & with a single deep
one i, or vice versa two deep notches i with one shallow notch &; and, generally,
may alternate any number of shallow notches with any number of deep notchos,
provided always that the principle of the lighter remains unchanged; viz., that
when the arm falls into a shallow notch & the gas is turned on to the burner, but
when the arm drops into a deep notch the gas is entirely turned off.
Owing to the employment of this modification in the lower guides, it becomes
possible to extinguish or to light, at pleasure, a certain number of burners belonging
to the same pipe-system.
Thus, for example, if the lamps in any street are arranged in such manner that
the old numbers 1, 3, 5, 7, etc., carry guides in which two deep notches i alternate
with one single shallow notch &, and that the even numbers, 2, 4, 6, 8, etc., carry
guides in which one single deep notch i alternates with two shallow notches k, it
will be easily understood that, by passing a current through, the arms of
Nos. 1, 3, 5, 7, etc., will fall into a deep notch, while the arms of Nos. 2, 4, 6, 8, &c.,
will fall into a shallow notch k. It follows therefrom that the burnors 1, 3, 5, 7, etc.,
will be extinguished, while tho burners 2, 4, 6, 8, &c., will remain alight. The
dispatch of a second current will eflect the extinction, subsequently, of the latter
alternate series, 2, 4, 6, 8, &c., and thus all the burners will have been extinguished;
lastly, the transmission of a third electric current, will relight all the lamps of both
Beries.
The notches, instead of having a form like that of the letter M, may resemble
a V or any other suitable form.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,
The modifications above described, applied to the construction of the lower

page_text: 12th February, 1895, which consist in causing the alternation of deep with
shallow notches, in any predetermined number and sequence, suitable to the
requirements of the service in each particular case, for the purpose of enabling
only a certain number of burners belonging to the same district, area, or pipe-
system to be lit or extinguished.
BOULT & WADE,
Agents for the Applicant.