IM-. PROVEMENTS IN THE CONSTRUCTION OF SAFETY LAMPS FOR MINERS
Year: 1867

page_text: LETTERS PATENT to Edward Jones, of Pontblyddyn, in the Parish of
Mold, in the County of Flint, Engineer, for the Invention of "IM-.
PROVEMENTS IN THE CONSTRUCTION OF SAFETY LAMPS FOR MINERS.
PROVISIONAL SPECIFICATION left by the said Edward Jones: at the
Office of the Commissioners of Patents, with his Petition, on the
29th May 1867.
I, EDWARD JONES, of Pontblyddyn, in the Parish of Mold, in the County of
Flint, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF SAFETY LAMPS FOR MINERS," to be as
follows:-
This Invention has for its object a more simple and effective arrangement
of mechanism applied to a miner's safety lamp for extinguishing the flame
should the miner attempt to remove the protecting wire gauze than has
hitherto been employed for this purpose; the simplicity of this improved
arrangement of mechanism admitting of its ready application to the safety
lamps now in use. Around the upper rim of the oil vessel a ring is fitted
which can be removed when required for the purpose of filling the oil vessel
and trimming the lamp; on this ring there is an upright or support upon

page_text: which a lever, cap, or extinguisher is mounted so as to move on a pin joint;
this cover or extinguisher is retained in a vertical position by a catch or
projection formed on the upper end of a rod, also mounted upon the ring
before referred to, so as to be capable of making a partial revolution in its
support or bearing. The lower end of this upright rod is bent or formed
with a projecting arm at right angles to the catch or projection on its upper
end. Upon the inner surface of the screw cap or cover of the lamp which
carries the wire gauze for protecting the flame of the lamp there is a small
arm or spring catch moving on a pin joint let into a recess and pressed
outwards or downwards by a spring, so that the arm will pass over the
projection upon the lower end of the vertical rod when the cap carrying the
wire gauze is being screwed on to the oil vessel; should the miner attempt
to unscrew the cap to remove the wire gauze, then the arm on the inner
surface of the cap will act upon the arm or projection on the lower end of the
vertical rod and cause it to make a partial rotation, thus releasing the catch
on its upper end from retaining the extinguisher, which falls over the wick,
being pressed down by a spring so as to extinguish the flame of the lamp.
SPECIFICATION in pursuance of the conditions of the Letters. Patent, filed
by the said Edward Jones in the Great Seal Patent Office on the
29th November 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
JONES, of Pontblyddyn, in the Parish of Mold, in the County of Flint,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of May, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign did, for Herself, Her heirs and successors, give and grant me, the
said Edward Jones, Her special licence that I, the said Edward Jones,
my executors, administrators, and assigns, or such others as I, the said
Edward Jones, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times thereafter
during the term therein expressed should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN THE CONSTRUCTION OF SAFETY LAMPS FOR MINERS," upon the condition

page_text: attempt to unscrew the cap or cover e to remove the wire gauze f, then the
arm on the inner surface of the cap or cover e will act upon the arm or
projection d on the lower end of the vertical rod d, and cause it to make a
partial rotation, thus releasing the catch d¹ on its upper end from retaining
the extinguisher c', which then falls over the wick, the extinguisher being
pressed down by a spring c³ so as to extinguish the flame of the lamp; a spiral
spring may be substituted for the spring &³ if desired.
Having thus described the nature of my Invention, and the manner of
performing or carrying the same into practice, I would have it understood
that the arrangement and construction of the parts may be varied without
departing from the true character of my Invention; but what I claim is, the
arrangement and construction of safety lamps as herein described and shown
in the Drawing, by which means the flame is extinguished should an attempt
be made by the miner to remove the cover e and wire gauze f.
In witness whereof, I, the said Edward Jones, have hereunto set my
hand and seal, this Twenty-sixth day of November, in the year of our
Lord One thousand eight hundred and sixty-seven.
Witness to the signature of Edward Jones,
GEO. H. BIRKBECK,
Patent Agent,
of 34, Southampton Bldgs.,
Chancery Lane,
& Mineral Oil Works, near Mold.
EDWARD JONES. (L.S.)