Improvements in the Construction of Miners' Safety Lamps.
Year: 1892

page_text: Date of Application, 14th Sept., 1892
Complete Specification Left, 12th June, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Miners' Safety Lamps.
We, WILLIAM ACKROYD, of Morley, in the County of York, Colliery Owner,
and WILLIAM BEST, of No. 9 Little Fountain Street, Morley, aforesaid, Foreman
Lampman, do hereby declare the nature of our invention to be as follows:-
This invention has for its object, the construction of miners safety lamps in such
a manner that, when travelling over the rough ground in the pit bottom, the light
will burn steadier and not so easily extinguished as when the lamp is constructed
as hitherto :-Also to arrange the securing of the extinguishing tube of the lamp
in its required position, so that, the "spring bar" and hole through the lamp casing
may be dispensed with, and the tube retained in its position, in such a manner that,
it cannot be operated except when the lamp bottom is removed, which may be
locked in the usual manner.
We accomplish our object in the following manner, at the top of the lamp
above the wire gauze, is a plate secured in the usual manner, through which is
passed a bar in such a manner that, it is free to slide through the said plate.
The lamp is carried by the before mentioned bar, and on the bar at each side of
the plate a collar is formed, between which and the plate, is placed a spring some-
what compressed, thus forming a compound cushion so that, on travelling over
rough ground, any sudden movement is minimised by the compound cushion and
the liability of the light being extinguished reduced.
The extinguishing tube is provided with a sliding pin, made to project beyond a
flange by means of a spring, and on screwing the said tube into the plate supporting
the lamp glass, when it arrives at the required position, the before mentioned pin
engages with a hole in the plate, thus preventing the further turning of the tube.
The wick tube screws through the extinguishing tube as hitherto, and when
engaged therewith, the extinguishing tube cannot be operated.
Dated this 13th day of September 1892.
JOHN WAUGH,
Arent.
COMPLETE SPECIFICATION.
Improvements in the Construction of Miners' Safety Lamps.
We, WILLIAM ACKROYD, of Morley Main Collieries, Colliery Owner, and
WILLIAM BEST, of Little Fountain Street, Foreman Lampman, both of Morley,
near Leeds, in the County of York, 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 :-
The object of our invention is to construct miners' safety lamps in such a manner,
that when they are carried over rough ground, the light will burn steadily, and
not be so easily extinguished as is the case with lamps constructed as hitherto. A
further object of our invention is to construct the extinguishing tube and base plate
of the lamp in such a manner that the "spring bar" arrangement, usually employed
for securing the extinguishing tube is dispensed with, and the said extinguishing
tube can only be operated after the lamp bottom has been removed, which latter
may be locked in the usual way.
In order that our invention may be clearly understood and readily carried into
effect, we will proceed to describe same with reference to the accompanying
drawings, in which similar letters refer to like parts in all the figures,

page_text: Fig. 1 is a side elevation, and Fig. 2 is an inverted plan of so much of a miner's
safety lamp, constructed according to our invention, as is sufficient to illustrate the
first part thereof.
Fig. 3 is a transverse section, and Fig. 4 is an inverted sectional plan, with the
oil chamber removed, of the lower part of a lamp constructed according to our
invention.
According to our invention, and with reference to Figs. 1 and 2, we provide a
bar A, which is free to slide through the plate B of the lamp. Springs C and C¹
are mounted on the said bar A on each side of the plate B, and the said springs C
and Cabut against the collars A¹ and A³, situated on the bar A. The hook D,
by which the lamp is suspended; is connected to the bar A, and is thus elastically
coupled to the lamp frame, so that when the lamp is carried over rough ground, any
sudden shock to the lamp is minimized, and the liability of the light becoming
extinguished is greatly reduced.
Referring to Figs. 3 and 4, E is the extinguishing tube, which is provided with
a collar or Hange F. A screw thread G is cut upon the exterior of the extinguishing
tube E which enables same to be screwed through and up to the base plate H which
supports the glass J. On the underside of the flange F a spring K is fastened,
carrying on its end a pin L which passes through the said flange and projects
beyond. A corresponding hole or holes M is or are made in the base plate H for
receiving the said pin L, thus locking the extinguishing tube E and base plate H
firmly together. The interior of the extinguishing tube E is provided with a screw
thread for engaging with a screw N situated on the wick tube P of the oil
chamber R.
In preparing a lamp for use, the base plate H is first screwed up to the glass J,
whereby such glass is kept firmly in position. The extinguishing tube E is then
screwed over the wick tube P, and the wick is lighted by a match or other
convenient means. The oil chamber R carrying the wick tube P and extinguishing
tube E is inserted in the base of the lamp frame, and on being turned, the thread G
of the extinguishing tube E screws into the base plate H, until the pin L enters one
of the holes M, thus locking the said extinguishing tube E to the base plate H.
On the oil chamber R being unscrewed, the wick tube P unscrews from the
extinguishing tube E, passing downwards through same, thereby depriving the
flame of the necessary supply of air and extinguishing the light.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. In miners' safety lamps, the hook D elastically coupled to the plate B. of the
lamp, by means of the bar A, having collars A¹ A, and springs C C¹, substantially
as and for the purposes set forth.
2. In miners' safety lamps, the extinguishing tube E, having flange F and spring
pin L, in combination with the base plate H, substantially as and for the purposes
set forth.
3. In miners' safety lamps, the combination of the extinguishing tube E, flange F,
screw thread G, base plate H, spring K, pin L, holes M, screw N, and wick tube P,
substantially as and for the purposes set forth.
4. The arrangement, construction, and combination of the various parts forming
improvements in the construction of miner's safety lamps, substantially as herein
set forth and shewn in the accompanying drawings, together with any mere
modification or modifications thereof.
Dated this 12th day of June 1902