CERTAIN IMPROVEMENTS IN MINING LAMPS, AND IN APPARATUS CONNECTED THERE WITH.
Year: 1874

page_text: LETTERS PATENT to William Edward Teale, of Manchester, in the
County of Lancaster, Lamp Manufacturer, for the Invention of
"CERTAIN IMPROVEMENTS IN MINING LAMPS, AND IN APPARATUS CONNECTED
THERE WITH.
"
Sealed the 23rd February 1875, and dated the 26th August 1874.
PROVISIONAL SPECIFICATION left by the said William Edward
Teale at the Office of the Commissioners of Patents, with his
Petition, on the 26th August 1874.
I, WILLIAM EDWARD TEALE, of Manchester, in the County of
Lancaster, Lamp Manufacturer, do hereby declare the nature of the
said Invention for "CERTAIN IMPROVEMENTS IN MINING LAMPS, AND IN
APPARATUS CONNECTED THEREWITH," to be as follows :—
.
My Invention relates to mining lamps and to a peculiar combination
of mechanism applied thereto, and its object is,-
Firstly. To provide greater security against the opening of mining
lamps while a light is burning within the same, and at the same time to
simplify the method of opening and closing such lamps. For this

page_text: purpose I dispense with the ordinary screw thread on the outer periphery
of lamps. I fix a lamp wick tube in the centre of the lamp, carrying
externally an ordinary screw thread, upon which I screw an extinguishing
tube, the said tube carrying at its lower end a circular groove into which
I fix one or more stop pins. Through the side of the lamp cover or case
I fix a movable bolt carrying at one ond a semicircular piece of metal
capable of fitting into the groove of the extinguishing tube. Upon the
movable bolt I also fix a spring in such position that when the bolt
is pushed towards the extinguishing tube carrying the semicircular piece
of metal into its groove the spring is released from the path in which it
works and so prevents the withdrawal of the bolt from the outside of the
lamp. In order to open the lamp I unscrew the wick tube from the
oxtinguishing tube, which said extinguishing tube is prevented from
turning round by the stop pins fixed in the groove thereof coming in
contact with the semicircular piece of metal on the end of the movable
bolt. The lamp being opened I depress the spring on the movable bolt
and return it through its path to the outside of the lamp cover.
Secondly. To facilitate the lighting of lamps in which gas or light
hydrocarbon oil is used as the illuminating power, and when such lamps
arc locked or securely fastened, for this purpose I fix through a con-
venient part of the lamp cover in insulating material two metal wires
terminating within the lamp in fine platinum points, the said points.
being arranged nearly opposite cach other and across the path of the
flame of the lamp; the said metal wires I allow to project a short
distance outside the lamp cover.
In order to light the lamp I pass a current of electricity through the
aforesaid wires from a suitable electrical apparatus, when sparks of
electricity will pass between the platinum points and ignite the gas or
other inflammable vapour used as an illuminator.
SPECIFICATION in pursuance of the conditions of the Lettors Patent 3
filed by the said William Edward Teale in the Great Scal
Patent Office on the 25th February 1875.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of August, in the year of our
Lord One thousand eight hundred and seventy-four, in the thirty-eighth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said William Edward Teale, Her special license
that I, the said William Edward Teale, my executors, administrators,
and assigns, or such others as I, the said William Edward Teale, 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 MINING LAMPS, AND IN APPARATUS CONNECTED THEREWITH," upon the con-
dition (amongst others) that I, the said William Edward Teale, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describé
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 imme-
diately after tlie date of the said Letters Patent.
NOW KNOW YE, that I, the said William Edward Teale, do hereby
declare the nature of my said Invention, and in what manner the
samo is to be performed, to be particularly described and ascertained in
and by the following statement, and in order that my Invention may
be fully understood, I shall now proceed more particularly to describe
the same, and for that purpose shall refer to the several figures on the
annexed Sheet of Drawings, the same letters of reference indicating
corresponding parts in all the Figures, that is to say:-
Fig. 1 shews an elevation of a mining lamp; Fig. 2, a plan shewing
section through glass cylinder; Fig. 3, a section of lower part of lamp;
Fig. 4, a section shewing oil cell with wick tube partly screwed out; Fig. 5,
plan of lamp from below with oil cell removed and the lower part of the
extinguishing tube removed (as shown by the dotted line at A, Fig. 4).
a, a, is the outer metal case of a lamp; b, a glass cylinder fitting in a
recess in the metal case; c, wire rods to support the cap d and keep the
wire guaze in position; e is the cell of the lamp to contain oil or other

page_text: inflamable material; f is a wick tube rising from the centre of the
lamp cell, and has externally a screw thread; g is an extinguishing tube
having externally a screw thread g¹, by which means it may be fixed in
a proper position in the lamp (as shewn in Fig. 3), the said extinguishing
tube has also a screw thread internally corresponding to the thread on the
wick tube. The said tube has also at its lower ond a circular groove h,
into which is fixed two stop pins i, i, (see Fig. 5). j is a movable bolt
working in a suitable path in the side of the lamp (see Figs. 1, 3, 4,
and 5), one end of the said movable bolt is shaped in a semicircular
form so as to fit into the groove of the extinguishing tube; on the
said movable bolt there is also fixed a spring k (see Figs. 3 and 4).
In order to put the lamp in operation I unscrew the oil cell from the
extinguishing tube g, as shewn in Fig. 4, the extinguishing tube is held
in position by the semicircular shaped end of the bolt pressing against
the stop pins i, i, in the groove h of the said tube. When the oil cell is
removed I depress the spring k down into the recess made for it in the
bolt j, and return the bolt through its path (as shewn by dotted lines in
Fig. 5), a sufficient distance to leave the tube g at liberty to be
unscrewed from the chamber of the lamp. I then fill the lamp with
suitable inflamable oil and screw the tube g down over the wick tube ƒ,
light the lamp, and return it to its position, as shewn in section in Fig. 3;
when the lamp is in this position I push the bolt forward so that the
semicircular shaped end thereof will pass into the groove h when the
spring k is released from the path in which the bolt j works and
expands so as to prevent the return of the bolt until the lamp cell is
again removed and the spring k depressed as before.
In carrying out the second part of my Invention I fix two stout wires
through the opposite sides of the body of a lamp in insulating material,
as shewn b, b, Fig. 3. I terminate the said wires in fine platinum
points. When it is required to light the lamp I pass a current of
electricity from a suitable electric battery through the wires b, b, when
sparks will bound from one to the other of the fine terminal points and
ignite the gas or other inflammable vapor used as an illumnator.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used or
carried into effect. I would observe in conclusion that what I consider

page_text: to be novel and original and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is,―
Firstly. The application and use of a wick tube having externally a
screw thread working in conjunction with an extinguishing tube, in the
manner and for the purpose herein described and illustrated.
Secondly. The application and use of a movable bolt carrying a
spring and working in conjunction with an extinguishing tube, in the
manner and for the purpose herein described and illustrated.
In witness whereof, I, the said William Edward Teale, have here-
unto set my hand and seal, this Twenty-fourth day of February,
One thousand eight hundred and seventy-five.
WILLIAM E. TEALE. (L.s.)