Improvements in or connected with Electrical Gas Igniting Devices.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Electrical Gas Igniting Devices.
1, JEAN JAHNSSON, of 9 Regeringsgatan, Stockholm, in the Kingdom of Sweden,
Jeweller, do hereby declare the nature of this invention to be as follows:-
This invention has reference to electrical gas igniting devices of the kind
described in the Specification of my prior application for Patent No. 3085 dated
the 12th day of February 1895.
The object of my present invention is to enable the person operating the push-
button or other electrical contact employed for controlling the said gas-igniting
device, to be informed whether the gas has been effectually turned on or off by the
push-button and also whether the coil of platinum wire or the like used for lighting
the gas has been rendered incandescent.
The means I employ for this purpose consist of an indicator which is located
within sight of the person operating the push-button, the said indicator being
provided with a dial bearing words such as "on" and "off" and also with an
incandescence coil of platinum or other suitable wire of a similar kind to that
employed for igniting the gas. The said indicator is arranged in circuit with the
gas-igniting device or devices and is adapted to work synchronously with the valve
or the said gas igniting device so that when the push-button is operated, the
aforesaid dial will display the word "on" if the gas valve be raised, or the word
"off" if the gas valve be lowered; the incandescence indicator coil will also glow
simultaneously with the coil employed for igniting the gas as it escapes from the
Should the dial not exhibit the word "
on or the word "off" in correspondence
with the result intended to be produced by the operation of the push-button, it will
be known that the gas valve of the igniting device has not worked properly.
Similarly should the incandescence indicator coil not glow when the dial exhibits
the word "on" it will be known that the gas has not been ignited.
burner.
"
In constructing my indicator I may employ an electro-magnet and a pivoted
armature, the electro-magnet being in circuit with the gas igniting device. The
aforesaid pivoted armature is advantageously situated below the electro-magnet so
that its weight normally keeps it away from the electro-magnet. Hinged to a
vertical arm carried by the said armature is a pawl which is so arranged that it
normally engages by its own weight with the teeth of a ratchet wheel mounted on
a rotary axis to which the before mentioned dial is connected. Each time a current
is sent through the circuit by the operation of the push-button the indicator electro-
magnet attracts its armature thereby causing the ratchet-wheel to move the distance
of one tooth and the dial to move sufficiently to exhibit the word "
through a glazed opening in the casing of the indicator. A step by step rotary
movement is thus imparted to the dial so that it alternately exhibits the words
on and "off" corresponding with the open and closed position of the valve in
the gas igniting device.
"
دو
on or
off"
The said vertical arm carried by the armature is advantageously provided with
a projection or finger which comes in the path of the teeth of the ratchet wheel
when the latter is actuated by its pawl and thus prevents the ratchet wheel from
turning too far. A spring pawl or detent may also be provided for avoiding
backward movement of the ratchet wheel.

page_text: The incandescence indicator coil is in the same circuit with the indicator electro-
magnet and may be of any ordinary and well known construction.
Dated this 26th day of July 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in or connected with Electrical Gas Igniting Devices.
I, JEAN JAHNSSON, of 9 Regeringsgatan, Stockholm, in the Kingdom of Sweden,
Jeweller, 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 :-
This invention has reference to electrical gas igniting devices of the kind
described in the Specification of my prior application for Patent No. 3085 dated
the 12th day of February 1895.
The object of my present invention is to enable the person operating the push-
button or other electrical contact employed for controlling the said gas-igniting
device, to be informed whether the gas has been effectually turned on or off by the
push-button and also whether the coil of platinum wire or the like used for lighting
the gas has been rendered incandescent.
66
on
"
and
The means I employ for this purpose consist of an indicator which is located
within sight of the person operating the push-button, the said indicator being
provided with a dial bearing words such as
"off" and also with au
incandescence coil of platinum or other suitable wire of a similar kind to that
employed for igniting the gas. The said indicator is arranged in circuit with the
gas-igniting device or devices and is adapted to work synchronously with the valve
or the said gas igniting device so that when the push-button is operated, the
aforesaid dial will display the word "open" if the gas valve be raised, or the word
"closed" if the gas valve be lowered; the incandescence indicator coil will also
glow simultaneously with the coil employed for igniting the gas as it escapes from
the burner.
In order to enable the construction of the device to be better understood, I
have represented the invention by way of an example in the accompanying drawing
in which
Figure 1 is a front elevation of the device with the front part of the case
removed.
Figure 2 is a side elevation partly in section on the line 1. 2 of Figure 3 and
Figure 3 is a front elevation partly in section with some of the parts broken away
to better show the mechanism.
The drawing shows an apparatus which I attach to the electric lighter and
which, when arranged at the side of the switch or push button enables the person
acting upon the said switch to ascertain on the one hand, whether the system
operates properly at the moment when the said switch is acted upon and, on the
other hand to see by the simple inspection of the dial of the apparatus, whether the
burners are alight or extinguished.
This lighting device is actuated by sending an electric current into the lighting
device arranged near each burner. Hitherto the person operating the switch had
no means at disposal for ascertaining whether or not the manipulation of the switch
had produced the desired effect namely: the lighting or the extinction of the gas
burners.
In order to remedy this inconvenience I have contrived means for completing
my lighting device by the indicator which is represented in the drawing.
This apparatus substantially comprises a box A of wood or other appropriate

page_text: material, the front of which facing the operator, is provided with a glazed opening
or window B formed by a sheet of glass, mica or any other transparent material.
In the interior of this box is arranged an electromagnet C which is included in an
electric circuit. This electric circuit comprises a wire D, leading from the switch
and terminating in a conducting rod E, connected to another conducting rod E¹,
through the medium of a platinum wire e. To the conducting rod E' is connected
one end of a wire F, the other end of which is in connection with the coils of an
electromagnet C to which coils is also connected a wire G leading to the lighters of
the system and from thence back to the battery which is directly connected to one
of the contacts of the switch.
It will thus be seen that, when the circuit is closed by the operation of the
switch the current will first of all cause the wire e to become heated to incandescence,
the effect of which will be to inform the operator that the current has effectually
traversed the circuit, and subsequently to attract the plate H by means of the
electromagnet C.
The plate H carries a rod h, to which the pawl I is fixed which acts upon the
ratchet wheel J. This ratchet wheel J is keyed upon the axis J¹, upon which is
mounted a wheel L which is provided near its circumference, with the indications
open, closed," arranged alternately.
$6
"66
"
The position of this wheel is so calculated, that when the burners are alight
the word " open
or its equivalent is visible through the opening or window B.
If, under these conditions, the operator acts upon the switch the effect of which
will be that the gas burners are extinguished if they were alight, he will know
that the operation has really been effected, since the wire e will have become red
hot in consequence of the passage of the current, as has been herein before stated.
Moreover, the current, when traversing the electromagnet C, forces this latter to
attract the plate H, so that the ratchet wheel J will be turned to the extent of
one tooth only, owing to the retaining pawl J. It follows therefrom that the
inscription "closed" will replace the inscription "open," previously visible through
the opening or window B. The operator is thus able to know at any moment
by simply looking at the said window B, whether the gas burners are extinguished
or alight.
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 :-
An indicator inserted in the electric circuit in which the lighting and
extinguishing devices for the burners are arranged, this device or apparatus
consisting of a box, in which are arranged two metal rods E and E' connected by a
platinum wire e, an electromagnet C, an oscillating plate H, provided with the
rod h, which carries the pawl 1, engaging with a tooth of the ratchet wheel_J,
jointly acting with the wheel L mounted upon the axis J', and a retaining pawl J",
the apparatus indicating to the operator, when the wire e is red hot, that the
current has effectually traversed the wire D, the rods E and E¹, the wire F, the
electromagnet C and the line, and that, consequently, all lighting devices have
acted, and moreover enabling the operator to ascertain from the inscription visible
through the opening or window B, whether all lighting devices are closed or
whether all said devices or only a certain portion of them are open.
DL 1
J
A 1 1000
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.