Year: 1885

page_text: I, EVAN THOMAS, of the Cambrian Safety-lamp Works, Aberdare, in the County
of Glamorgan, safety-lamp maker, do hereby declare the nature of this invention to
be as follows:-
This invention, which relates to miners' safety-lamps of the "Clanny” type,
consists in means designed to prevent the flame from being blown through the
meshes of the wire gauze by the force of a rush or powerful current of air or of
gas or admixture of gas and air to which such lamps are liable to be exposed.
This invention, therefore, is, by lessening the liability of ignition of inflammable
gas by the flame of the lamp designed to more effectually prevent explosions in
coal mines.
According to this invention there is placed around the lower part of the wire
gauze a metallic cup-shaped guard arranged concentrically with the. gauze and
extending upwards to a suitable point from the upper face of the ring which
surmounts the glass. This cup-shaped guard is open at the top. Beyond it, and
also arranged concentrically with the gauze; is a cylindrical or conical shield the
bottom of which rests, on the upper face of the ring aforesaid: This shield extends
upwards to a point above the top of the gauze and is surmounted by an overhanging
cover. The shield is pierced with orifices towards the lower end and also towards
the top. Opposite the upper series of orifices, and springing from the inside of the
shield, is a ring-shaped guard which is curved inwards as it extends upwards
towards the cover of the shield below which it terminates. Around the cover of
the shield is arranged a series of perforations which are in a plane which lies
outside of the edge of the top or mouth of the ring-shaped guard.
Air to feed the flame passes into the interior of the lamp through the lower and
upper orifices in the body of the shield, the current, after..entering the orifices,
impinging upon the lower and upper guards which, consequently, intervene to
break the force of currents, which otherwise would be liable to cause the flame to
be blown through the meshes of the gauze.
The products of combustion pass out through the perforations formed, as aforesaid,
in the cover of the shield.
A downward current passing in at the perforations in the cover of the shield
would be deflected by the upper guard to pass out through the orifices formed
towards the top of the body of the shield.
W. LLOYD WISE,
Agent for the Applicant..

page_text: I, EVAN THOMAS, of the Cambrian Safety-Lamp Works, Aberdare in the County
of Glamorgan, safety-lamp maker, 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 which relates to miners' safety-lamps of the "Clanny" type,
'consists in means designed to prevent the flame from being blown through the
meshes of the wire gauze by the force of a rush or powerful current of air or of
gas or admixture of gas and -air to which such lamps are liable to be exposed.
This invention, therefore, is, by lessening the liability of ignition of inflammable
gas by the flame of the lamp, designed to more effectually prevent explosions in
coal mines.
According to this invention there is placed around the lower part of the wire
gauze or reticulated cylinder or cage a metallic cup-shaped guard arranged con-
centrically with the gauze and extending upwards to a suitable point from the
upper face of the ring which surmounts the glass. This cup-shaped guard is open
at the top. Beyond it, and also arranged concentrically with the gauze, is a
cylindrical or conical outer casing or shield the bottom of which rests on the upper
face of the ring aforesaid. This shield extends upwards to a point above the top
of the gauze and is surmounted by an overhanging cover. The shield is pierced
with orifices towards the lower end and also towards the top. Opposite the upper
series of orifices, and springing from the inside of the shield, is a ring-shaped guard
which is curved inwards as it extends upwards towards the cover of the shield
below which it terminates. Around the cover of the shield is arranged a series of
perforations which are in a plane which lies outside of the edge of the top or mouth
of the ring shaped guard.
i
Air to feed the flame passes into the interior of the lamp through the lower and
upper orifices in the body of the shield, the current, after entering the orifices,
impinging upon the lower and upper guard which, consequently, intervene to break
the force of the currents, which otherwise would be liable to cause the flame to be
blown through the meshes, of the gauze.
The products of combustion pass out through the perforations formed, as aforesaid,
in the cover of the shield.
A downward current passing in at the perforations in the cover of the shield
would be deflected by the upper guard to pass out through the orifices formed
towards the top of the body of the shield.
i
9
In the annexed sheet of illustrative drawings Fig. 1 is an elevation partly in
vertical section of a lamp embodying my invention, and Fig. 2 is a similar view
illustrating a modification.
Referring to Fig. 1, a is the lamp proper, b the ring that surmounts the glass,
c the wire gauze or reticulated cylinder or cage, d the outer casing or shield with
apertures at ee and ff; g is the cup shaped guard arranged concentrically with
the gauze c and extending upward from the upper face of the ring b. The rim g¹
of the guard g, as will be seen, is situate at some distance from the outer surface

page_text: of the gauze o. h is the overhanging cover of the shield d and is pierced with
orifices ii; k is a ring shaped guard having approximately the form of a hollow
truncated cone; around its base it is fitted and attached to the interior of the
shield d and at its upper part it is open. It will be seen on reference to the
drawing that a downward current passing in at the perforations i in the cover h
would be deflected by the upper guard k to pass out through the orifices f in the
upper part of the shield d.
Referring to Fig. 2 like parts are marked with the same letters of reference as
in Fig. 1. The lower guard g however in this case instead of being cup shaped is
made cylindrical and is formed with a flange g¹ that answers the same purpose of
giving an outward direction to air entering by the orifices e e as such air travels
upward. The gauze c is of double thickness at the upper part it being provided
with a gauze cap c¹.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I déclare that what
I claim is:-
1. In a miner's safety lamp the combination with a reticulated cylinder or cage
and an outer casing or shield having air inlet holes of a guard or deflector arranged
around the lower part of such reticulated cylinder or cage substantially as described
for the purpose specified.
2. In a miner's safety lamp having a reticulated cylinder or cage and an outer
casing or shield with lower and upper holes such as e and the combination with
the said shield of a ring shaped guard springing from the inside of the shield and
curving inward as it extends upward towards the cover of the shield below which
it terminates substantially as described for the purpose specified.
3. In a miners safety lamp the combination of a reticulated cylinder or cage an
outer casing or shield with holes in its lower and upper parts a guard or deflector
surrounding the lower part of the reticulated cylinder or cage and an upper guard
such as ke arranged opposite the upper holes in the shield and terminating below the
cover h substantially as described for the purposes specified.
Dated thin 10th Adan of Muh 1004
W. LLOYD WISE,
Agent for the Applicant.