AN IMPROVED MINER'S SAFETY LAMP
Year: 1884

page_text: LEWIS JENKINS, Londonderry, Smethwick, Near Birmingham, Engine Driver, do
hereby declare the nature. of this invention for "AN IMPROVED MINER'S SAFETY
LAMP," to be as follows:-
i
This invention relates to improvements in the construction of miners safety
lamps and in outward general appearance resembles some well known miners
safety lamps, having a well or lamp with an ordinary burner in it also an ordinary
cylendrical wire gauze, the difference however in the lamps above refered to and
the one herein sought to be protected is that it has a conical shaped wire gauze
inside of the ordinary gauze, and on the burner of the lamp a loosely fitting tube
to be raised by two springs over and above the level of the cotton by means of
which the light is extinguished, when the lamp is opened the flame of the lamp is
surrounded by two cylendricilly shaped glasses thereby forming a safety chamber
for the flame.
To light this lamp it has to be unscrewed out of the metal plate forming the
bottom part of the frame, in which a screw thread is cut, to receive a screw thread
cut at the top part of the lamp, just above the screw in the said plate on either
side of a central aperture, through which the tube containing the wick of the lamp
passes, are fixed two small metal, springs, facing and inclining at their upper
extremities towards each other like a pair of clamps, so that the lighted cotton of
the lamp passes úp between them, at the same time they clip the loosely fitting
tube above named resting against the underneath parts of a flange on its upper
orifice and thereby raising the tube above the cotton, thereby extinguishing the
flame, thus preventing accidents by exposing a naked flame in a mine.
Other securities against accidents in this lamp as compared with other miners
lamps is the two cylendrical glasses forming, the chamber for the flame one being
fitted to surround the flame and the other placed outside thereof forming a guard
or shield to protect the inner or safety glass as it may be named from spots or
splashes of water, thus adding considerably to the value of this lamp as a safety
lamp.
1
The conically shaped wire gauze being fitted close down into the metal frame
which forms the upper part of the glass safety chamber and extending near the
wire gauze forming the top of the outer wire gauze, thereby enclosing the inner
space, and so protecting the flame in the lamp against the risk of gas reaching it,
as gas entering the lamp between the two wire gauzes would extinguish the flame
thereof.

page_text: LEWIS JENKINS, Londonderry, Smethwick Near Birmingham, Engine Driver, do
hereby declare the nature of this invention for "AN IMPROVED MINER'S SAFETY
LAMP," and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to improvements in the construction of miner's safety
lamps, and in outward general appearance resembles some well known miner's
safety lamps, baving a well or lamp with an ordinary burner in it, also an ordinary
cylendrical wire gauze, the difference however in the lamps above refered to and
the one herein sought to be protected is that it has a conical shaped wire gauze
inside of the ordinary gauze, and on the burner of the lamp a loosely fitting tube to
be raised by two springs over and above the level of the cotton by means of which
the light is extinguished when the lamp is opened. The flame of the lamp is
surrounded by two cylendrically shaped glasses thereby forming a safety chamber
for the flame.
To light this lamp it has to be unscrewed out of the metal plate forming the
bottom part of the frame in which a screw thread is cut to receive the screw
thread which is cut at the top part of the lamp or reservoir.
Just above the screw in the said plate on either side of a central aperture
through which the tube containing the wick of the lamp passes are fixed two
small metal springs facing and inclining at their upper extremities towards each
other like a pair of clamps so that the lighted cotton passes up between them they
being at this time extended apart from each other thereby allowing the light to
pass up between them without coming in contact with them; after which they
partly close and clip a projecting beveled edge or flange at the top of the loosely
fitting tube above named and shown in the annexed drawings at 01 and by means
thereof raise the tube above the cotton when the lamp is unscrewed and withdrawn
extinguishing the flame on any attempt made to open the lamp; thus preventing
accidents by exposing a naked light in a mine.
Other securities against accidents in this lamp as compared with other miners
lamps is the two cylendrical glasses forming the chamber for the flame one being
fitted to surround the flame and the other placed outside thereof forming a guard
or shield to protect the inner or safety glass as it may be named from spots or
splashes of water; thus adding considerably to the value of this lamp as a safety
lamp.
The conically shaped wire gauze being fitted close down into the metal frame
which forms the upper part of the glass safety chamber and extending near the
wire gauze forming the top of the outer wire gauze thereby enclosing the inner
space and so protecting the flame in the lamp against the risk of gas reaching it as
gas entering the lamp between the two wire. gauzes would extinguish the flame
thereof.
I herein refer to the accomanying drawings the same letters refering to
corresponding parts in the several figures respectively.
Fig 1, is an Elevation of the lamp in readiness for use.
Fig 2, is a Sectional Elevation of the lamp.
Fig 3, is a Sectional view of the line 2, 2, in Fig 1.

page_text: Fig 4, is a Plan and Elevation of the clamps or clips, by means of which
the loose collar is retained in its place while the lamp or resevoir is being
withdrawn.
Fig 5, shows Plan and Elevation of the oil resevoir of the lamp, A, A. represents
the oil resevoir showing a screw thread a, a, which in putting the lamp together
for use is firmly screwed into a deep plate shown at a¹, a¹. B, indicates the tube
for the cotton. C, C, indicates the loose collor being cliped by the springs c¹, c¹.
D, D, indicates the inner glass cylinder; while d, d. indicates the outer glass
cylinder thereby forming a space or chamber e, e. between the two; having guide
rods G, G. to fix the upper plate X, X. to the lower X1, X. and thus keeping the
two cylindrical glasses in their place and for the purpose of fitting all the parts
below the wire gauze firmly together; while the cylindrical wire gauze H, H. and
the conical or inner wire gauze I, I. are kept firmly in their places by means of
rods G, G. fixing the top plate V; V. to the lamp plate f, f. The wire gauze being
protected by means of a cylindrical metal case J¹, J¹.
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
1st The Conical Block Top Gauze: making the Lamp self extinguishing when
brought into gas.
2nd Outside glass Cylinder: being a protector for the inside safety glass.
3rd Crab Claw springs: to prevent the loose tube being extracted with the
burner and making the lamp self extinguishing in the act of being unscrewed.
Dated this fuirty first day of March 1000.
S. B. NORRIS & Co.,
4, Featherstone Buildings, High Holborn, W.C.,
Agents to the above named Lewis Jenkins.