IMPROVE- MENTS IN MINERS' SAFETY LAMPS
Year: 1857

page_text: LETTERS PATENT to William Price Struvé, of the Town of Swansea, in
the County of Glamorgan, Civil Engineer, for the Invention of "IMPROVE-
MENTS IN MINERS' SAFETY LAMPS."
Sealed the 18th December 1857, and dated the 25th June 1857.
PROVISIONAL SPECIFICATION left by the said William Price Struvé
at the Office of the Commissioners of Patents, with his Petition, on the
25th June 1857.
I, WILLIAM PRICE STRUVE, of the Town of Swansea, in the County of
Glamorgan, Civil Engineer, do hereby declare the nature of the Invention
for "IMPROVEMENTS IN MINERS' SAFETY LAMPS," to be as follows:
This Invention has for its object improvements in miners' safety. lamps.
For these purposes, the oil vessel is attached to a ring fixed to the bottom of
a frame consisting of three bars, which come nearly together at their upper
ends, and have a handle or ring attached to them. The oil vessel is attached
to the lower ring by screwing into it, and in such manner as to rise above
such ring. The wire gauze is made into the form of a cone, the base of which
is fixed to the oil vessel or to the ring, in such manner that the wick tube,
and consequently the flame, may be considerably above the bottom of the wire"
gauze. The upper end of, the wire gauze is closed by a cap. or cover of wire
gauze. Around the burner is a glass chimney which is supported by three pro-
jections with hooked or turned-up ends, through ene of which a thumb-

page_text: screw is passed, which retains the flanch formed at the bottom of the glass
chimney securely in the turned-up or hooked ends of the projections above
mentioned. In place of the conical wire gauze a conical glass may be
similarly used.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Price Struvé in the Great Seal Patent Office on
the 23rd December 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
PRICE STRUVE, of the Town of Swansea, in the County of Glamorgan, Civil
Engineer, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of June, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twenty-first. year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William. Price Struvé, Her special licence that I, the, said William
Price Struvé, my executors, administrators, and assigns, or such others as
I, the said William Price Struvé,. 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 MINERS' SAFETY LAMPS," upon the condition (amongst
others) that I, the said William Price Struvé, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Price Struvé, do hereby
declare the nature of the said Invention, as
66
11.
and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:-
This Invention haf
has for its object improvements in miners' safety lamps. For
these purposes, the oil vessel is attached to a ring fixed to the bottom of a
frame consisting of three or more bars, which come nearly together at their
upper ends, and have a handle or ring attached to them. The oil vessel is
.:

page_text: attached to the lower ring by screwing into it, and in such manner as to rise
above such ring. The wire gauze is made into the form of a cone, the base
of which is fixed to the oil vessel or to the ring in such manner that the wick
tube, and consequently the flame, may be considerably above the bottom of
the wire gauze. The upper end of the wire gauze is closed by a cap or
cover of wire gauze. Around the burner is a glass chimney, which is supported
by three projections with hooked or turned-up ends, through one of which a
thumbscrew is passed, which retains the flanch formed at the bottom of the
glass chimney securely in the turned-up or hooked ends of the projections above
mentioned. The lamp may be used with or without the glass chimney. In
place of the conical wire gauze a conical glass may be similarly used.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 shows an elevation of a miner's safety lamp constructed and com-
bined according to my Invention; Figure 2 is a plan of the oil vessel and ring
or frame in which the vessel is received and fixed. a is the oil vessel; b, the
ring or frame in which it is screwed and retained by the screw c, or in any
convenient manner; d, d, are three rods fixed at their lower ends to the ring
b, and at their upper ends they come nearly together, and have a ring or
handle e attached; f is a cone of wire gauze fixed at its lower edge to the oil
vessel. The upper end is closed by a second cone of wire gauze, as shewn.
In witness whereof, I, the said William Price Struvé, have hereunto
set my hand and seal, this Eighteenth day of December, in the year
of our Lord One thousand eight hundred and fifty-seven.
Witness,
JOHN MORGAN,'
Swansea.
WILLIAM PRICE STRUVE. (L.S.)