IMPROVEMENTS IN MINER'S SAFETY LAMPS
Year: 1875

page_text: LETTERS PATENT to George Robson, of Whitwood Colliery, Norming-
ton, and Alfred Ellis, of Wakefield, Brassfounder, for the Invention
13
IMPROVEMENTS IN MINER'S SAFETY LAMPS."
Scaled the 31st August 1875, and dated the 4th March 1875.
PROVISIONAL SPECIFICATION left by the said George Robson and
Alfred Ellis at the Office of the Commissioners of Patents, with
their Petition, on the 4th March 1875.
We, GEORGE ROBSON, of Whitwood Colliery, Normington, and ALFRED
ELLIS, of Wakefield, Brassfounder, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN MINERS' SAFETY LAMPS," to be as
follows:-
This Invention relates to improvements in the construction of such
lamps so as to facilitate the preparing or trimming of them for the
miner, and also in rendering them more adaptable for locking than
heretofore, and consist in constructing all covers to fit to any bottom,
and all bottoms to fit any cover by having all made to one guage in tho
screw parts, so that no numbering or consequent sorting for the corre
sponding parts is required when preparing or trimming them.

page_text: The locking staple instead of being a fixture at one part of the bottom
as heretofore is fixed on a moveable ring which fits in a groove formed
in the bottom, so that at whatever place the locking link may be in
when the cover is screwed on to its proper place the staple is readily
moved to it, and there is a stop picce to prevent the ring being turned 5
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Robson and Alfred Ellis in the Great Scal
Patent Office on the 4th September 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, GEORGE
ROBSON, of Whitwood Colliery, Normington, and ALFRED ELLIS, of
Wakefield, Brassfounder, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of March, in the year of
our Lord One thousand eight hundred and seventy-five, in the thirty-
cighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said George Robson and Alfred Ellis, Her
special licence that we, the said George Robson and Alfred Ellis, our
executors, administrators, and assigns, or such others as we, the said
George Robson and Alfred Ellis, our 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 we, the said George
Robson and Alfred Ellis, our executors or adminstrators, by an instru-
ment in writing under our, or their, or one of their hands and scals,
should particularly describe and ascertain the nature of the said In-
vention, 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 we, the said George Robson and Alfred Ellis,
do hereby declare the nature of our said Invention, and in what

page_text: manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, and accompanying.
Sheet of Drawings, that is to say:
This Invention relates to improvements in the construction of such
lamps so as to facilitate the preparing or trimming of them for the
miner, and also in rendering them more adaptable for locking than
heretofore. These consist in constructing all covers to fit to any
bottom and all bottoms to fit any cover, by having all made to one
gauge in the screw part, so that no numbering or consequent sorting
for the corresponding parts is required when preparing or trimming
them.
The locking staple instead of being a fixture at one part of the
bottom as heretofore is fixed on a moveable ring which fits in a groove
formed in the bottom, so that at whatever place the locking link
may be in when the cover is screwed on to its proper place the staple
is readily moved to it, and there is a stop piece to prevent the ring
being turned in the wrong direction, so as to render it impossible to
unscrew the cover.
In order that this Invention may be more fully understood, we
hercin give reference to the accompanying Sheet of Drawings illustrativo
thereof.
A is the locking staple, which instead of being a fixture on the
bottom part of the lamp is mounted upon a ring B which is capable of
sliding in a groove formed in the bottom of the lamp. When the two
parts of the lamp are screwed together the locking staple can be turned
round. until opposite to the link C. A stop piece a is provided which
prevents the lamp from being unscrewed when locked.
In witness whereof, I, the said Alfred Ellis, for and on behalf of
myself and the said George Robson, have hereunto set my hand
and seal, this Second day of September, in the year of our Lord
One thousand eight hundred and seventy-five.