Improvements in Safety-lamps.
Year: 1891

page_text: Date of Application, 19th May, 1811-iccepted, 22nd Aug., 1891
COMPLETE SPECIFICATION.
Improvements in Safety-lamps.
1, VITUS WAGENER of 20 Hoch Strasse of Wattenscheid, in the German
Empire, Copper-smith 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 :-
Many risks have been incurred by miners opening their lamps, and although this
foolhardiness has led from time to time to the loss of many valuable lives and the
men were duly cautioned yet the custom continued to prevail. The lamps hitherto
used were so constructed, that the lower rim of the upper part was provided with an
internal thread and the upper rim of the oil-fount with a corresponding external
thread. After the head-piece had been screwed upon the oil-fount, a lead-scal was
thought sufficient to prevent the connection being broken. This however has
proved to be a very erroneous supposition.
The object of the present invention is to provide the connection between the
head-piece and the oil-reservoir of a safety lamp, with a locking-device, which
miners will be unable to open.
This locking device is illustrated in the accompanying drawings, in which like
letters of reference indicate corresponding parts throughout the different views.
Figure 1 is a front elevation of a miner's safety lamp provided with my improved
device.
Figures 2 and 3 are sectional elevations of the same.
Figure 2 is a cross-section on line ab of Figure 2.
Figure 3 is a cross-section on line c. d of Figure 3.
Figure 4 is an elevation partly in section of the head-piece.
Figure 5 is an elevation of the oil-fount or reservoir.
Figure 5A a sectional elevation, and Figure 5B a plan of the same.
The cylinder O is formed integrally with the oil-fount F and is covered by the
lid " which being centrally bored, serves also as a guide for the piston rod b
(Figure 5). The piston B which is turned so as to exactly fit the cylinder O, is
held in its lowermost position by the spiral-spring C, which is inserted between the
piston B and the lid c. The lower part of the cylinder is constructed with
a side branch A having a port or passage, which lead below the piston at
one end, and is enlarged at the other, to permit of inserting therein a sieve
plate g
The piston-rod is provided at the top with a projection D, while the upper brim
of the oil-fount is furnished with two lugs D¹, D, (Figures 3 and 34) which are at
the same height as the projection D when the piston B is raised to its highest
position. The lower part of the head-piece E is adapted to encircle and fit the
upper brim of the oil-fount and is provided with angular slots n. n' n² (Figures 2, 3
and 34) corresponding with the projection D and the lugs D', D. The slot n being
intended to receive the projection D, has a slanting edge k, which forces the said
projection, to slide upward, when the cap or head-piece E is tilted over and twisted,
so as to bring the lugs D', D2, into the horizontal parts of the slots n', and n², and
when these lugs arrive at the ends of the slots, the projection D comes into position
above the notch shown in dotted lines in Figure 2 and snaps into this notch k¹
under the action of the spiral spring C.
The manipulation of the lamp is now obvious. Firstly, the head-piece E being
removed, the oil-fount is filled with oil, and after the lamp has been lighted, the
head-piece is tilted while guiding the projection and lugs D, D', D2 into the vertical
parts of the slots n n¹ n². After the head-piece is pushed down as far as it will go,
it is only needed to impart a turn thereto for the projection D to slide up the slope k

page_text: and snap into the notch as above described. The spiral-spring C maintaining
the projection D within this notch ', prevents the bead-piece from being turned
either way, while at the same time the lugs D' D' prevent the same being lifted
off in a vertical direction so that miners will not be able to open the lamp in the
ordinary way. When the oil is burnt out or the lamp is otherwise required to be
opened, the latter is connected to an air-pump reservoir or the like, in charge of an
official, by means of a pipe screwed upon the side-branch A. Air or fluid being
now forced or pumped through the passage into the cylinder below the piston B,
the latter is forced upwards with the rod and the projection D, thus releasing the
head piece which can now be twisted in a reverse direction to the former and
removed.
Having thus 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 safety-lamps: A device for locking the head-piece to the oil-fount or reservoir
consisting of the angular slots (n. n¹ n³) the first of which has a slanting edge (k)
and a vertical part (4) in combination with a corresponding projection D and
lugs (D D2), the former of which is connected with a piston (B) adapted to work
in the cylinder (0) which is formed integrally with the oil-fount (F), and is
constructed with the side branch A furnished with a passage f. allowing compressed
air to operate upon the piston (B) for the purpose of loosening the connection
between the head piece and the oil reservoir, a spiral-spring (C) being further
provided for the purpose of holding the projection D within the notch (¹)
substantially as described and shewn and for the purpose set forth.
11
101
1001
VITUS WAGENER.
Rayner & Cassell,
37, Chancery Lane, London, W.C., Agents for the Applicant.