An Improved Miners' Safety-lamp.
Year: 1890

page_text: Date of Application, 20th Sept., 1890
Complete Specification Left, 17th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
An Improved Miners' Safety-lamp.
I, LEWIS NOAH WILLIAMS, of The Cambrian Safety-lamp Manufactory,
Aberdare, in the County of Glamorgan, Miners' Safety-lamp Manufacturer, do
hereby declare the nature of this invention to be as follows:-
This invention, which relates to miners' safety-lamps, consists in an improved
method of supplying air to feed the flame.
Under this invention the air is first admitted to the lamp through orifices in the
step-top above the top of the glass and passes through the said orifices into an
annular space at the bottom of the ring to which the shield or bonnet is at the
bottom secured.
The pillars which support the step-top are tubular and at the top they com-
municate with the annular space in the shield ring.
The air admitted to the annular space, as aforesaid, passes down through the
tubular pillars at the bottom of which it escapes into a space around the ring on
which the glass rests.
'
Thence through orifices provided in this ring, guarded by an envelope of gauze,
the air is admitted to the burner at a point below the flame.
The annular chamber in the shield ring is closed at the top except at points where
orifices are provided communicating with the space between the central gauze
chimney and the shield. Surplus air passes off through the said orifices in the top
of the annular chamber and has its exit through apertures provided under the top
of the shield for the escape of the products of combustion.
Dated this 19th day of September 1890.
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.
COMPLETE SPECIFICATION.
An Improved Miners' Safety-lamp.
I, LEWIS NOAH WILLIAMS, of The Cambrian Safety-lamp Manufactory,
Aberdare, in the County of Glamorgan, Miners' Safety-lamp Manufacturer, 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, consists in an improved
mode of supplying air to feed the flame.
According to this invention the air enters the lamp first through orifices in the
step-top by which the glass is surmounted.
These orifices communicate with an annular space at the bottom of the ring to
which the shield or bonnet is at the bottom secured. The pillars which support
the step-top are tubular. At their upper ends they open into the annular space
aforesaid, and at their lower ends they open into a space provided around the ring
on which the glass rests. The air passes down the pillars into the last mentioned
space whence by orifices, guarded by a band of gauze, it is admitted to the burner
at a point below the flame. The annular space in the ring which surmounts the
glass is closed at the top except at points where orifices are made communicating
with the space between the central gauze chimney and the shield or bonnet.
Surplus air passes off through the said orifices and finds its exit through apertures
provided under the cover of the shield for the escape of the products of combustion.
[Price 6d1

page_text: In the accompanying drawing, Fig. 1 represents a part vertical section of a miners'
safety lamp constructed in accordance with this invention.
The air whereby the flame is fed with oxygen enters the lamp by orifices a
provided in the step-top bas seen more particularly at Fig. 2 which represents a
plan of the step-top on and above the line ac Fig. 1.
The orifices a communicate with the annular space c in the ring d surmounting the
glass e. Thence by the hollow pillars the air is conducted to the space g provided
around the ring h on which the glass e rests.
From the space g the air is admitted by the orifices i, guarded by the band of
gauze k, to the burner at a level below the flame.
Accordingly, the air is fed to the flame in an unagitated or steady current so that
the risk of blowing the flame through the gauze is lessened and an adequate supply
of air is ensured.
The lamp is locked at the bottom by an ordinary binding screw j by which the
outer shell is clamped to the oil chamber.
Surplus air entering the annular space c in the ring d passes through orifices
into the space existing between the interior of the shield or bonnet m and the usual
gauze chimney n. At Fig. 3 is shewn a view of the ring d inverted. The air which
passes by the orifices into the space between the shield and the gauze chimney n
escapes with the products of combustion through the apertures o at the top of the
lamp.
After the ring d has been screwed on in place it is, together with the bonnet,
clamped to the step-top by an ordinary binding screw p.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
1. The combination in a miners' safety lamp of a step-top such as 6 having orifices
such as a for admission of air, a hollow ring such as d into which the orifices a open,
tubular pillars for conducting the air from the ring d to a ring such as with
annular space g from which by apertures i, guarded by a gauze shield k, the air is
admitted to the burner at a level below that of the flame, substantially as herein-
before described.
2. The provision of orifices in the top of the ring d for carrying off surplus air
into the space between the usual bonnet m and the usual gauze chimney n, as
herein before described.
Dated this 15th day of June 1891
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.