A Safety Mining Lamp.
Year: 1894

page_text: Date of Application, 24th Mar., 1894-Accepted, 28th Apr., 1894
A Safety Mining Lamp.
I, HUGO WOLFF, of No. 26 Bahnhof Strasse, Karlsruhe, Fabrikant, do
hereby declare the nature of my said 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 the following invention is a mining lamp, which by a possible
simple mode of working in consequence of its ingenious principle can be described
as being non-explosive, and thereby simultaneously warns the miner if stormy
weather is approaching.
In the accompanying drawing this lamp is illustrated,
Figure 1., being a vertical section,
Figure 2., a horizontal section, on the line a-b, and
Figure 3., a similar section on the line e-d of Figure 1, in the direction indicated
by the arrow.
The improved miners' lamp consists essentially of three parts:-
1st. The frame, the upper part of which is formed of hanging or suspending
rings or hoops A' and the lower part of screw nuts A².
2nd. The proper or actual lamp B which can be screwed into A* and by means
of contra or opposite nuts and leaden closings or fastenings, or another different
form of fastening arrangement or device can be secured against any false or
incompetent opening. This part consists furthermore of the actual burner. B'
which is screwed into the oil receptacle or receiver; a system of tubular trusses
or supports B³ arranged in the burner and penetrate through the oil receptacle or
receiver, and an arrangement or device B lead or conducted through a small
tube B2, and running through the oil receiver or receptacle with the object of
raising and lowering and inserting fresh wick without reaching the burner.
3rd. A most essential part, which serves to make the lamp non-explosive and
safe consisting of an addition C in the shape of a several sided or polygonal case,
the sides of which consist of trusses or supports from about 10 m.m. in length
and 1 m.m. in width soldered together. The upper border or circumference of
the polygon is formed by means of a cylindrical tubular band C, whilst the lower
surface is open, and, by means of a ring r, is fastened or secured to a glass
cylinder C which forms the connection between the lamp B and this addition C,
and simultaneously distributes the rays of light.
:-
The mode of operation of this lamp is as follows:-
The necessary atmospheric air for burning is conveyed or guided through the
tubular support B³ in sufficient quantities to the burner. Should the weather
become at all stormy or rough, the lamp is not immediately extinguished but the
fumes or gases entering from all sides would cause a brighter burning, and then a
flaring or flickering of the flame (struggling or striving against the gas) and
thereby warns the miner of the approaching atmospheric disturbance.
By extinguishing the lamp or in the event of the wick being raised too high,
the flame can never penetrate through the body C and thereby prevents any chance
of an explosion. Also a burning through of this said body is likewise prevented,
(this being possible in the application of a wire gauze netting) by the said small
tubes.
Figures and 3 represent how easy the burner can be attended to.
The hook
shaped wire B is also easily worked from the underside of the lamp, and grips the
hook d in a slit or slot e of the burner direct on the wick, and by moving the said
wire B the wick is raised or lowered as required.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
A mining safety lamp, consisting of an addition or onset B³ of separate tubular
trusses or supports, arranged round the burner, and a similarly arranged body C
.situate over the burner, essentially as described and shown.
Dated this 22nd day of March 1894.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.