Improvements in Miners' Safety Lamps.
Year: 1895

page_text: Improvements in Miners' Safety Lamps.
I, WILLIAM DAVIES of 15 Salem Terrace, Llwynypia, in the County of Glamorgan,
Engine Fitter, do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in miners' safety lamps, and the object of
it is to provide a lamp with an internal automatic extinguishing mechanism of such
a construction that it by reason of its position and construction, be freed by a serious
attempt to open the lamp.
It consists in the combination of an extinguishing plate or cap, a spindle or axis
upon or with which that plate or cap can revolve, a slide providing for the plate
or cap being moved up to the plane of its operation or down from it, spring adapted
to swing the plate or cap over the wick, as soon as the said plate or cap is pushed
up above the level of the burner tube and an inclined plane carried by the ring upon
which the glass is usually placed. This plane is hinged to the ring and held down
by a spring. When the top part of the lamp is screwed down upon the oil pot,
the plane lifts and passes idly over the extinguisher (plate or cap, above mentioned)
then lying close up to the burner but beneath its top. Unscrewing the oil pot,
carries the inclined plane around the other way, thereby making it meet, if the
unscrewing is persisted in, the extinguisher, when it will pass under it and raise
it up to its slide till at last it is free of the burner, across the top of which it is
forthwith swung by the spring, thereby extinguishing the lamp and also trimming it.
Dated this 30th day of October 1895.
PHILLIPS & LEIGH,
Agents for the Applicant.
improvements in Miners Daily amps.
I, WILLIAM DAVIES, of No. 15 Salem Terrace, Llwynypia, in the County of Glamorgan,
Engine Fitter, 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 :-
My invention relates to improvements in miners' safety lamps, and comprises an
automatic extinguishing device adapted to be set in action by any serious attempt
to open the lamp.
In the accompanying drawing hereinafter referred to
Figure 1 is an elevation showing part of a safety lamp to which my said invention
is applied.
Figure 2 is a plan of the same, showing the extinguishing plate out of engagement
with the wick tube.
Figure 3 shows a plan and an elevation of the ring upon which the glass is usually
placed, and carrying a plate which forms an inclined plane.
Figure 4 is a vertical section of the oil chamber showing the arrangement of the
extinguishing device.

page_text: In carrying my invention into practice, I arrange the wick tube a as usual at the
centre of the oil chamber A so as to project upwards therefrom.
Along the wick tube a extends a spindle 6 held in brackets or bearings attached
to the said tube, Figures 1 and 4. To the upper extremity of the spindle b I secure
an extinguishing plate c, whilst a helical spring d surrounds the lower part of this
spindle and is adapted to turn the same so as to bring the extinguishing plate c
over the wick tube a, Figure 4. In order to prevent the spindle from making
a complete turn, the extinguishing plate e carries a downwardly projecting pin e
which only permits the wick tube being just covered by the said plate c.
The part
of the latter which first comes in contact with the wick is slightly bent upwards,
tbus facilitating its passage over the wick to extinguish the light.
Besides receiving a turning movement, the before mentioned spindle is also
capable of a vertical movement, so that the extinguishing plate e can either be brought
over and away from the wick tube a or slid downwards to a small extent, so causing
one edge of the plate c to bear against the side of the wick tube, as shewn in
Figures 1 and 2.
To the ring B, upon which the glass is usually placed, I attach, by a hinge for
other means, a plate g forming an inclined plane and forced downwards by a suitable
spring. When under these circumstances, the upper portion of the lamp is screwed
upon the oil chamber A, the hinged plate g passes over and around the outside edge
of the extinguishing plate c, and the spring attached to the said hinged plate allows
it to rise and pass over the extinguishing plate without interfering with its action
or with the light. The upper part of the lamp having been screwed home and locked
in the customary manner, if anyone should attempt to unscrew it in order to gain
access to the interior, the hinged plate g will pass below the extinguishing plate c
and raise the same until it clears the wick tube a; whereupon the helical spring d
surrounding the spindle causes the before mentioned plate e to turn and pass over
the lighted wick, thus instantaneously extinguishing the light. As the extinguishing
plate c passes over the wick tube a it acts as a kind of snuffers, effectually trimming
the wick by each turning movement.
My invention can be applied to any existing miners' safety lamps wherein the
upper part is screwed to the lower part or oil chamber, such as for example the
Davey and Clanny lamps.
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 :-
1. In miners' safety lamps the arrangement of an extinguishing plate upon a
spindle capable of turning and vertical movements, substantially as and for the purpose
hereinbefore set forth.
2. In miners' safety lamps the combination, with an extinguishing plate, of a
plate attached to the ring upon which the glass is usually placed, and subjected to
the action of a spring, substantially as and for the purpose hereinbefore set forth.
3. In miners' safety lamps the extinguishing device constructed and operating as
and for the purposes hereinbefore set forth with reference to the accompanying
drawings.
Dated th: 11.
1800
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.