Improvements in Miners' Safety Lamps.
Year: 1892

page_text: Date of Application, 17th Sept., 1892
Complete Specification Left, 7th June, 1893-Accepted, 8th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Miners' Safety Lamps.
I, WILLIAM HENRY JOHNSON, of the firm of Richard Johnson, Clapham, and
Morris, Limited, of 26, Lever Street, Manchester, in the County of Lancaster,
Wire Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements applicable to miners' safety lamps generally,
and particularly to lamps for burning petroleum and other mineral oils and volatile
spirits, and the chief objects of my improvements are to enable petroleum or other
illuminant of a like nature to be employed without liability of its igniting below
in the pricker slot of the wick tube and further to increase the lighting power
irrespective of the nature of the illuminant used.
In carrying my improvements into effect I employ a circular plate instead of
the usual following up ring. This circular plate is preferably dome shaped or
convex on its upper surface which is burnished plated enamelled or otherwise
suitably treated to act as a mirror or reflector, and a circular hole is made in the
centre of the following up plate to allow the wick and burner to pass through.
When a circular wick is used no further alteration is required; but for a flat
wick I secure upon the upper end of the flat wick tube a circular collar which just
fills the central circular hole in the following up plate and acts as a shield to
diminish any tendency of the petroleum or other volatile illuminant igniting below
in the pricker slot.
I make grooves nicks or projections in or on the under side of the following
up plate to receive a key by which it can be screwed up into the lamp frame or
unscrewed as the case may be.
Dated this 16th day of September 1802
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Miners' Safety Lamps.
I, WILLIAM HENRY JOHNSON, of the firm of Richard Johnson Clapham and
Morris Limited, of 26 Lever Street, Manchester, in the County of Lancaster,
Wire Manufacturer, 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 :-
My invention relates to improvements applicable to miners' safety lamps generally,
and particularly to lamps for burning petroleum and other mineral oils and volatile
spirits, and the chief objects of my improvements are to enable petroleum or other
illuminant of a like nature to be employed without liability of its igniting below
in the pricker slot of the wick tube and further to increase the lighting power
irrespective of the nature of the illuminant used.
In carrying my improvements into effect I employ a circular plate instead of the
usual following up ring. This circular plate is preferably dome shaped or convex
on its upper surface which is burnished plated or enamelled or otherwise suitably
treated to act as a mirror or reflector, and a circular hole is made in the centre of
the following up plate to allow the wick and burner to pass through.
When a circular wick is used no further alteration is required; but for a flat
wick I secure upon the upper end of the flat wick tube a circular collar which just
Price 1

page_text: fills the central circular hole in the following up plate and acts as a shield to
diminish any tendency of the petroleum or other volatile illuminant igniting below
in the pricker slot.
I make grooves nicks or projections in or on the under side of the following up
plate to receive a key by which it can be screwed up into the lamp frame or
unscrewed as the case may be.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Fig. 1 is an elevation, partly in section, of a miners' safety lamp made according
to my invention.
Fig. 2 is an elevation, also partly in section, of the reservoir for the illuminant
with the wick tube and following up ring.
Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a detached view of the wick tube.
In Fig. 1, a represents the reservoir for the illuminant, the following up ring,
the upper portion of which is dome shaped or convex and burnished plated or
enamelled to act as a mirror or reflector, e is the wick tube connected to the
reservoir a, d the pillars for supporting the upper portion of the lamp e and
shield and g the glass.
The wick tube c is, in the drawing, shown for a flat wick, and it has a circular
collar c¹ secured to its upper end which just fills and closes the central circular hole
in the following up ring and acts as a shield to prevent any possibility of the
petroleum or other volatile illuminant igniting below in the ordinary slot made in
the tube c for the pricker wire employed to raise or adjust the wick.
On the under side of the following up ring bare several grooves or nicks b' to
receive a key by which the ring can be screwed up into the lamp frame or
unscrewed as required.
The wick tube has a flange e² which rests upon the reservoir a and is secured to
it by a screwed ring h, see Fig. 2, which also shows the collar e' filling the central
hole in the following up ring b.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
In a miners' safety lamp-
1. A wick tube arranged for a flat or circular wick in combination with a
following up ring having a central hole which the upper portion of the wick tube
is formed to exactly fill and close substantially as and for the purposes described.
2. A dome shaped or convex following up ring burnished, plated or enamelled
and furnished with a central hole to admit a wick tube and preferably with grooves
or nicks on the under side to receive a key substantially as and for the purposes
described.
3. The general combination and arrangement of parts embodying my improve-
ments in miners' safety lamps substantially as and for the purposes described and
as illustrated by the drawings annexed.
Dated this 6th day of June 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.