A Miner's Improved Safety Lamp.
Year: 1893

page_text: Date of Application, 25th Apr., 1893
Complete Specification Left, 20th Nov., 1893-Accepted, 24th Mar.,
1894
PROVISIONAL SPECIFICATION.
A Miner's Improved Safety Lamp.
I, WILLIAM LEWIS Engine Turner Amman House Tyrcanol Morriston South
Wales do hereby declare the nature of this invention to be as follows:-
=
An extinguisher so placed and arranged within the lamp, that the action of
opening or unscrewing the lamp brings it vertically over the flame, and a spiral
spring then depresses it over the burner thereby extinguishing the flame.
Dated this 24th day of April 1893.
COMPLETE SPECIFICATION.
A Miner's Improved Safety Lamp.
I WILLIAM LEWIS, Engine Turner, of Ammah House, Morriston, South
Wales, 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 :-
This invention for improvements in miners safety lamps has for its object to so
construct such lamps that any attempt to gain access to the flame, by removing the
oil reservoir from the body of the lamp, serves to automatically extinguish the
flame, and consists of an extinguishing cap normally held free of the flame but
which, on turning the reservoir relatively to the body of the lamp in the act of
unscrewing it, engages with a projecting spring catch which pushes it vertically
over the wick holder on which it is pressed by a spring.
In the accompanying sheet of illustrative drawings
:-
Fig. 1 is a sectional elevation of the lower part of a safety lamp constructed
according to this invention and Fig. 2 is a horizontal section of the same.
An ordinary oil reservoir a is screwed into a socket 6 connected to the upper part
of the lamp by the rods c, the cylindrical glass tube d being secured tightly in
position by the adjustable screwed collar washer e in the usual manner.
A bent arm carrying an extinguisher cap 9 is mounted on the vertical pin h,
secured to the reservoir a, and about which it turns freely and is pressed downwards
by a spring i. Normally the arm frests upon a carrier plate secured to the
reservoir a by legs m n and abuts against a stop o as shown in dotted lines in Fig. 2.
When, however, it is attempted to remove the reservoir by unscrewing it from the
socket ring 6 the end p of the bent arm f strikes a spring catch q attached to the
ringe which, on the continued rotation of the reservoir, forces it off the carrier
plate 1 and against a stop pin, the spring i pressing it downwards and causing the
cap g to rest upon the wick holders and thereby extinguish the flame as will be
readily understood.
To re-light the lamp the oil reservoir is removed and the arm f replaced in
the position indicated in dotted lines in Fig. 2.
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 :-
:-
1. In miners safety lamps; an extinguisher secured to an arm free to turn about

page_text: a vertical axis and which, when the oil reservoir is unscrewed, is forced, by a
catch, vertically over the wick holder to extinguish the flame, substantially as
described.
2. The combination with the extinguisher cap 9, arm fand spring i of the carrier
plate with stop o and spring catch g substantially as described and for the purpose
set forth.
3. The combination of parts constituting my improved miners safety lamp, the
whole arranged constructed and operating substantially as described in the foregoing
Specification and illustrated in the drawings hereunto annexed.
Dated this 18th day of November 1894.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.