Improved Device for Igniting Safety and other Lamps.
Year: 1893

page_text: Date of Application, 30th June, 1893-Accepted, 5th Aug., 1893
COMPLETE SPECIFICATION.
Improved Device for Igniting Safety and other Lamps.
1, HEINRICH FREISE, Engineer, of Hamme, near Bochum, in the Kingdom of
Prussia, German Empire, 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 :--
The present invention relates to igniting devices for miners', safety, and other
lamps, in which an igniting strip of the ordinary construction having caps arranged
along its length is forced upwards in the vicinity of the wick of the lamp and
simultaneously one of the caps caused to explode and ignite the lamp, and the
invention consists mainly in the details of construction and manner of guiding
the transporter for the igniting strip, as hereinafter more particularly set forth.
In order that the present invention may be more easily intelligible, reference is
had to the accompanying drawings in which similar letters denote similar parts
throughout the several views.
Fig. 1 is a vertical section through the oil well of a lamp and the igniting
device.
Fig. 2 a similar section through the oil well with the igniting device removed.
Fig. 3 is a plan of Fig. 1.
Figs. 4 and 5 are sections through the igniting device showing the transporter in
its various positions.
Fig. 6 is an end elevation of the said device.
a is the igniting strip having caps band being coiled inside the casing A, in the
manner shown at Figs. 1, 4, and 5. The free end of the said coil a is led under
the guide arm c mounted inside the casing A, and then taken upwards, passing out
at the upper end of said casing under the igniting teeth g. The latter are carried
by the spring arm d mounted on the bottom of the casing and so arranged as to
exert pressure on the caps of the igniting strip as they pass between it and the side
of the casing. The transporting device for pushing the igniting strip upwards is
operated from the bottom of the lamp by means of the button, the stem of said
buttons extending upwards and being guided in the casing A. To the upper end
of the casing is attached a claw or gripper e, the form of which may be clearly
seen at Fig. 3, said gripper being adapted to grip the igniting band from behind
the arm d carrying the igniting teeth g, when the button fis pushed upwards, but
on retracting the button to be disengaged from the said igniting strip. This is
effected by the guide cams h, h, fixed at each side of the casing A and by the
laterally extending projections i, i, at each side of the stem of the button just
below the gripper e, (Fig. 6).
The upper end of the stem of the button f is of a springy or yielding nature, so
that when the button is pushed upwards (Fig. 5) the projections i, i, slide along
the left side of the cams h, h, and force the gripper to contact with the igniting
strip pushing the same upwards, whilst on retracting the button, the projections i, i,
are guided on the right hand side of the cams, thus disengaging the gripper from
the said strip.
The device operates in the following manner :-
The button is pressed upwards, taking with it the igniting strip a the cap of
which is brought into contact with the teeth g and explodes, burning for a second
or two, and igniting the wick of the lamp.
A sheathing is soldered or otherwise fixed in the oil well of the lamp, corre-
sponding in shape to the form of the casing A of the igniting device and the latter
is slid into this sheathing and held in place in any convenient manner. In order
to enable the igniting strip to be easily and conveniently replaced when used up,
[P11

page_text: the casing A. is provided with a hinged side hinged at m to the bottom of the
said casing.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is performed, I declare that what I
claim is :-
An igniting device for miners', safety lamps, and the like, of the construction
substantially as described and illustrated in the accompanying drawings.
D
CASTLE SMITH,
"Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicant.