Year: 1886

page_text: passed again through the oil can thus forming an arch within the lamp. This tube
has an aperture & cut through it in a lateral direction and on a level with the
flame e of the lamp ƒ is a short outer tube intended to act as a valve to keep the
aperture d closed when it is not in use; said valve is regulated by spring g. his
the fuse which is pushed up that side of the tube b containing lateral aperture d
for the purpose of fuse being ignited. is a floating tube placed within tube b and
is narrowed off towards its apex so that the fuse when passed up may become
wedged and thus carry the said floating tube with it. A groove j is cut in the
tube b as represented in Fig. 3 and this Fig. also shows a catch or knob k attached
The floating tube i when
to the outer tube or valve f and projecting inside same.
forced up by the fuse which shows just above periphery of said floating tube, comes
in contact with the catch or knob k and taking this with it thus opens the valve f
and comes within the area of the circumference of lateral hole d cut in tube b. The
lamp is surrounded at its lower part by a cylinder of stout glass
remainder of its height is encompassed by a sheet of thin metal m.
bored through the glass on a level with the aperture d and flame e.
fuse a fine wire is now passed through the hole n of glass l, thence through the
gauze covering a, it is then pushed through the aperture d and into the flame e.
When heated it is drawn back so that the heated part shall rest on the fuse h
projecting just above the periphery of floating tube within the aperture d and
will thus ignite the fuse.
and for the
A hole
is
To ignite the
Under the oil can is a space o, this is covered in by gauze p, and lastly by the
base plate q containing holes as shewn in Fig. 4. which is a plan view of the
underside of lamp. The smoke consequent on the ignition of fuse passes up and
down tube b and issues therefrom into space o, it then permeates the gauze p and
escapes through holes 7 Fig. 4. We prefer however to ignite fuse by means of a
piece of wire bent at a right angle as shown in Fig. 5. and to effect this we cause a
piece of wires to be passed vertically through the base of lamp and oil can midway
between the tube b and flame e. The wire 8 is bent at a right angle and on a level
with aperture d in tube b. The bent end of wire can then be heated in the flame
and turned so that the said heated end shall come in contact with and ignite fuse.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1st The construction of a safety lamp for igniting fuses, said safety lamp having
tube communicating with an inner gauze cylinder and having a flap valve substan-
tially as and for the purposes herein before described, set forth and fully illustrated
in the drawings annexed.
2nd The construction of a safety lamp for igniting fuses, said safety lamp having
arched tube, floating tube and sliding valve with spring attached and space chamber
protected by gauze for outlet of smoke; also having hole drilled through glass for
insertion of ignition wire, or preferably a wire bent at a right angle to communicate
from flame to fuse substantially as and for the purposes hereinbefore described, set
forth and fully illustrated in the drawings annexed.
3rd The construction and general arrangement of our improved lamp for blasting
and shot-firing in mines substantially as and for the purposes hereinbefore described,
set forth and fully illustrated in the drawings annexed.
1000