Improvements in the Construction of Miners' Safety Lamps.
Year: 1893

page_text: Date of Application, 20th Jan., 1893
Complete Specification Left, 19th Oct., 1893-Accepted, 25:h Nov., 1893
PROVISIONAL SPECIFICATION,
Improvements in the Construction of Miners' Safety Lamps.
We, WILLIAM ACKROYD, of Morley, near Leeds, 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 this invention to be
as follows:-
The object of this invention is to so construct miners safety lamps that, the
parts may be taken from together for cleaning and replaced more readily than
when constructed as hitherto; and to so arrange the lamps that petroleum oil may
be consumed and for the lamps to throw more light upwards than is the case when
arranged in the ordinary manner.
We accomplish our object by constructing the base of the inner and outer gauze
domes with flanges so arranged that, the flange of the outer dome supports the inner
gauze dome, and for the flanges of the latter to be constructed so that an annular
recess is formed for the reception of a flexible ring for facilitating the jointing of
the top of the lamp glass tube.
.
The burner of the lamp is made to receive a flat wick, and the bottom of the
lamp for the reception of the oil is so constructed that, the light may be adjusted
from the exterior of the lamp without the aid of a "pricker" and is accomplished
by a bar or spring engaging with a sliding cap covering the flange of the lamp
burner, so that, on screwing the lamp bottom one way or the other, the quality of
the light is regulated by causing the sliding cap to move up or down the burner or
wick holder.
The burner of the lamp may also be adjusted by forming a left hand screw
thread on the burner cap, and a right hand screw thread on the oil vessel of the
lamp, so that on screwing the oil vessel the position of the burner is adjusted as
required.
The light from the lamp is reflected upwards by means of a conical reflector
placed at the bottom of the lamp within the lamp glass tube, aud the wick holder
and cap are so arranged that on screwing the latter, the former is also operated.
The following up ring for securing the lamp glass tube between the same and the
annular groove in the gauze dome, is provided with two or more pins projecting
some distance from the said ring, and, is operated by a flanged key having suitable
holes therein for engaging with the said pins, so that on turning the key, the
following up ring is screwed for tightening or releasing the lamp glass tube.
Dated this 18th day of January 1893.
JOHN WAUGH,
A gent
COMPLETE SPECIFICATION.
Improvements in the Construction of Miners' Safety Lamps.
We, WILLIAM ACKROYD, Colliery Owner, and WILLIAM BEST, 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 they may be taken apart more readily for cleaning or for other purposes than
heretofore; and also to so construct the wick holder and parts connected therewith
that the flame may be regulated with the utmost facility and exactness.

page_text: In order that our invention may be clearly understood, we will proceed to
describe same with reference to the accompanying drawings, in which similar letters
refer to like parts in all the figures.
According to our invention we construct the base of the outer gauze dome A
with a single flange B as shewn at Fig. 1. The inner gauze dome C shewn at
Fig. 2 is provided with a flange D having turned down lips E and F, such lips
forming a circular recess, in the upper part of which is situated a flexible ring G.
In order to connect the parts together as shewn at Fig. 3, the lamp frame H is
inverted, and the outer gauze dome A is dropped into position, its flange B resting
upon the flange H¹ of the lamp frame H. The inner gauze dome C is then
dropped down until its flange D rests upon the flange B of the outer gauze dome A.
The glass tube J is now placed in position, the upper part thereof passing within
the recess formed by the lips E and F and resting against the flexible ring G,
and the glass tube J is held in position by the "following-up ring," in the ordinary.
way. The flexible ring G can be permanently fastened in the recess between the
turned down lips E and F by any suitable means, thus reducing the number of
detachable parts.
By arranging the parts as above described, their number is reduced, and con-
sequently the lamp can be taken to pieces and cleaned in a much more ready and
efficient manner than heretofore.
Figs. 4 and 5 are respectively front and side sectional elevations, and Fig. 6 is a
sectional plan, shewing the lower portion of a lamp constructed according to our
invention.
The oil chamber K is provided with a flat wick holder L, and a cap M having a
casing M' is mounted on the said wick holder L in such a manner that it is free to
slide up and down; this movement, however, is regulated by means of the pin L'
working in the slot M".
The following-up ring N is provided with a cylindrical extension N', on the
periphery of which are fastened two or any other suitable number of springs P
carrying pins or projections R, which pass through the cylindrical extension N¹
and project a short distance internally.
The lamp is lit when required for use, the wick projecting at a greater distance
above the wick holder L than is necessary for an ordinary flame. The oil
chamber K is then screwed into position within the lamp frame H, the pins R
receding to allow the sliding cap M to pass. After the cap M has passed the
pins R, the oil chamber K may be unscrewed in order to diminish the flame, such
cap M with its casing M¹ being held by the pins R in the up position, whilst the
wick holder L passes down within the casing M³, so that by screwing the lamp
bottom or oil chamber K one way or the other, the quality of the light or the
extent of flame is regulated or adjusted as may be required, such adjustment being
effected from the exterior of the lamp and without the aid of a pricker."
66
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 as our improvements in the construction of miners' safety lamps, is :
1. The outer gauze dome A with its flange B, the inner gauze dome C with its
flange D, turned down lips E and F, and flexible ring G, substantially as and for
the purposes set forth.
2. The flexible ring G, fitted in the recess formed by the turned down lips E and F,
substantially in the manner described.
3. The cap sliding on the wick holder and held in a fixed position in the lamp
frame, whereby the flame may be regulated in height by screwing the lamp bottom
up or down, substantially in the manner described.
4. In combination, the lamp frame H, glass J, oil chamber K, wick holder L,
pin L, cap M, casing M', slot M", following up ring N, extension N', springs P,
and pins R, substantially as and for the purposes set forth.
:

page_text: 5. The general arrangement, construction, and combination of the various parts
forming improvements in the construction of miners' safety lamps, substantially as
and for the purposes set forth.
Dated the 10th day of Octobox 1002
BREWER & SON,
London and Leeds, Agents for Applicants.