Year: 1887

page_text: Date of Application, 28th June, 1887
Complete Left, 15th Mar., 1888
Complete Accepted, 4th May, 1888
1, EDWARD PATTERSON, of 63, Clarence Grove, Heyworth Street, Everton, Liverpool,
in the County of Lancaster, Machinist, do hereby declare the nature of this invention
to be as follows:
1
This invention relates to improvements in miners safety lamps of the kind described
or referred to in the specifications of former applications for Letters Patent No. 14385
of 1886, and No. 2697 of 1887. It has reference to modifications of the extinguisher;
the arrangement of the inlet and exit tubes and the chimney, and is furthermore
designed to secure simplicity of construction.
The safety lamp in one form may be provided with a single glass cylinder that
encircles the single wick, or the duplex wicks, according to requirements. Around
the outer side of such cylinder a number of tubular stays are provided for protecting
the glass from being broken. These stays also serve for attaching a lower flanged
ring with an upper ring to which one or more shields or chimneys are secured.
The tubular stays are open at their upper ends and may be perforated for the
admission of air to support combustion.
The chimney according to this invention is made parallel so as to more readily allow
of the escape of the products of combustion which pass through a perforated plate or
disc held in position by a screw cap.
The extinguishing arrangement may be so constructed that in the event of the lamp
becoming overturned the oil from the oil well will not overflow into the body of the
lamp & thereby stop the perforations through which the air to support combustion
passes. In such an arrangement for a lamp having for example a duplex wick, the
wick tubes may be held in position by a screwed ferrule or tube that may extend some
distance above the top of the oil cistern. Concentric with and encircling this ferrule
or tube is an inner cap carried by an outer perforated cylinder or casing having a
perforated top. The parts are so arranged that when in position oil that may escape
from the oil cistern will flow through the small space between the wick tube or tubes
and the encircling tube or tubes, whilst air to support combustion enters through
perforations provided near the bottom of the outer cylinder or casing, and passes
upwards through an annular space to the flames.

page_text: It is to be understood that, by employing such an extinguishing arrangement, the
oil in the oil cistern does not become over-heated; and the lighted wicks are not so
quickly extinguished by the combustible gas of the mine, which gas may safely burn
around the wicks without danger. Should the wick flame or flames become extin-
guished by the explosive gas of the mine whilst the gas continues to burn around the
wick or wicks, such wick or wicks may in some cases be re-lighted without removing
the upper portion of the lamp by removing such lamp into a purer atmosphere. The
outer perforated cylinder or casing forming the extinguisher is of sufficient size to
fill the space left in a screwed ring for retaining the glass cylinder in position.
A spring may be employed for forcing up the extinguishing apparatus when
released, and also a rotating plate and catches for retaining the extinguisher in position
when the lamp is lighted, as mentioned in the specifications of said former applications
hereinbefore referred to. Similar locking arrangements to that described in one of
the former specification viz. No. 2697 of 1887, may be employed.
It is to be understood that miners safety lamps according to this invention can be
more simply constructed, and are safer and less liable to become deranged than those
heretofore constructed; only one outer shield and chimney tube being necessary for
baffling the currents of air entering the lamp, and the lamp may be quickly and
efficiently repaired or cleaned when the oil cistern is removed.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.,
Agent for the Applicant.

page_text: I EDWARD PATTERSON late of 63 Clarence Grove, Heyworth Street, Everton, but
now of 69 Dorset Road, Tue Brook, Liverpool, in the County of Lancaster, Machinist,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in miner's safety lamps of the kind
described or referred to in the specification of former Letters Patent No. 14,385
of 1886 and No. 2697 of 1887.
It has reference to modifications of the extinguisher; the arrangement of the inlet
and exit tubes and the chimney and is furthermore designed to secure simplicity of
construction.
The safety lamp in one form may be provided with a single glass cylinder that
encircles the single wick, or the duplex wicks, according to requirements.
Around the outer side of such cylinder a number of tubular stays are provided
for protecting the glass from being broken.
These stays also serve for attaching a lower flanged ring with. an upper ring to
which one or more shields or chimneys are secured.
The tubular stays are open at their upper ends and may be perforated for the
admission of air to support combustion.
The chimney according to this invention is made parallel so as to more readily
allow of the escape of products of combustion which pass through a perforated plate
and disc held in position by screws.
The extinguishing arrangement may be so constructed that in the event of the
lamp becoming overturned the oil from the oil well will not overflow into the body
of the lamp and thereby stop the perforations through which the air to support
combustion passes.
In such an arrangement for a lamp having for example a duplex wick, the wick
tubes may be held in position by a screwed ferrule or tube that may extend some
distance above the top of the cistern. Concentric with and encircling this ferrule or
tube is an inner cap carried by an outer perforated cylinder or casing having a
perforated top.
The parts are so arranged that when in position oil that inay escape from the oil
cistern will flow through the small space between the wick tube or tubes and the
encircling tube or tubes, whilst air to support combustion enters through perforations
provided near the bottom of the outer cylinder or casing and passes upwards through
an annular space to the flames.
It is to be understood that by employing such an extinguishing arrangement the
oil in the oil cistern does not become overheated, and the lighted wicks are not so
quickly extinguished by the combustible gas of the mine, which gas may safely burn
around the wick's without danger.
Should the wick flame or flames become extinguished by the explosive gas of the
mine whilst the gas continues to burn around the wick or wicks, such wick or wicks
may in some cases be relighted without removing the upper portion of the lamp, by
removing such lamp into a purer atmosphere.
The outer perforated cylinder or casing forming the extinguisher is of sufficient
size to fill the space left in a screwed ring for retaining the glass cylinder in position

page_text: A spring may be employed for forcing up the extinguishing apparatus when
released, and also a rotating plate and catches for retaining the extinguisher in
position when the lamp is lighted, as mentioned in the specification of said former
patents hereinbefore referred to.
Similar locking arrangements to that described in one of the former specification
Nos. 2697 of 1887 may be employed.
It is to be understood that miner's safety lamps according to this invention can be
more simply constructed and are safer and less liable to become deranged than those
heretofore constructed; only one outer shield and chimney tube being necessary for
baffling the currents of air entering the lamp, and the lamp may be quickly and
efficiently repaired or cleaned when the oil cistern is removed.
Referring to the accompanying sheet of illustrate drawings, Fig. 1. represents in
vertical section a miner's duplex wick lamp according to this invention the various
parts being shewn in the positions they occupy when the lamp is lighted.
Fig. 2. shews the lower part of the lamp as it appears when the body of the lamp
has been partially unscrewed from the oil cistern, the extinguisher released and forced
upwards and the light extinguished.
Fig. 3. is a plan or top view, partially in section, shewing the extinguisher pressed
down and caught under the catches of the oil cistern.
Fig. 4. is a section taken on line 8. 9. of Fig. 1. looking upwards.
Fig. 5. shews a portion of a single flat wick lamp according to this invention parts
being in similar positions to the corresponding parts in Fig. 1.
Fig. 6. is a plan of same partly in section.
Fig. 7. is a similar view to Fig. 5 with the exception that the extinguisher in this
case is designed to suit a round wick. Similar letters refer to like parts throughout
the drawings.
A single glass cylinder A. encircles the wick or wicks, whether they be duplex flat
wicks B. B. Figs. 1. 2. and 3. or a single flat wick as shewn in Figs. 5. and 6. or a
round wick as represented in Fig. 7. Six tubular stays C. C. connect the upper and
lower parts of the lamp, serving at the same time as air inlets, and as a protection to
the glass.
These stays are attached at their upper ends to the ring E, to which the conoidal
shield F. Fig. 1. is secured by rivets or other convenient means, and at their lower
ends to the Hanged ring D.
The tube stays C. C. are open at their upper ends and are also furnished with a
number of small perforations C₁, (, for the admission of air to support combustion,
the course of the air current being shewn by arrows in Figs. 1. 2. 5. and 7.
The chimney tube G. is made parallel, its lower end being flanged or provided with
an external projection to take into a suitable recess formed in the ring E. as shewn in
Fig. 1. whilst its upper end is closed or covered by a finely perforated circular disc H.
through which the products of combustion given off from the flame pass into the space
between the chimney G. and the top G¹ of the conoidal shield F. and thence through
perforations F F as indicated by arrows in Fig. 1.
The chimney G. rests on the glass cylinder A. which is retained in position by a
ring J. screwed into the flange a ring D.
By this arrangement the lamp may be readily taken to pieces for repairs. When it
is to be merely cleaned the upper part of the lamp remains intact.
The drawings illustrate various modifications of the extinguishing apparatus suitable
for use with various classes of wicks, for example, with duplex flat wicks as shewn
in Figs. 1. 2 and 3. the wick tubes B. B. are held in position by a screwed
ferrule or tube K. which extends upwards but does not touch the under side of the
extinguisher.
Concentric with and encircling the ferrule K. is an inner cylinder L. carrying the
cap L' to this cap, which is not perforated, is or are attached an extinguishing tube or
extinguishing tubes B₁ B₁ which slide freely over the wick tube or tubes B. B.
Connected with the cylinder L. is an outer perforated tube or casing M. provided with
a perforated cap M¹.

page_text: The extinguishing tube or tubes projects or project a little above the perforated
cap M', so that the air can pass through the perforations close against the flame.
The casings Land M. are attached together at their lower ends by a ring which is
provided with a loose washer N. (in the case of flat wicks) but which may be made
fast thereto with circular wicks, having arms or projections N¹ N¹ to take under
retaining catches (). O. Figs. 1. 3. and 6. as previously described in the before referred
to Patent Specifications.
The centre hole in the screwed ring J. Figs. 1. 2. 5. and 7. is of sufficient size to allow
the extinguisher to slide freely through it. A spiral spring P. encircling the wick
tube or tubes is provided for forcing the extinguisher upwards when released from the
catches O. O. by the spring rod Q. Fig. 1. which in this case may conveniently be
inserted in one of the air tubes C. This rod is provided with a small spiral spring Q¹
Fig. 1. for forcing it downwards and into gear with the projections. N¹ Ñ¹ as previously
described in the before mentioned patent specifications.
It will be understood that by employing an extinguishing arrangement according to
this invention the oil in the oil cistern is kept cool by the air which supports the flame
or flames.
This air passes through air tubes C. (1. thence downwards into the space between
the oil cistern and screwed ring, thence through perforations in the casing M. and
around the wick tube or tubes and afterwards upwards to the flame through the
perforated cap M' as indicated by arrows.
It will also be understood that the perforations are not readily liable to become
obstructed as the screwed ferrule K. prevents the escape of oil should the lamp be
momentarily overturned.
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 in a miner's safety lamp is
1. In a miner's safety lamp an automatic extinguisher comprising an extinguishing
tube or extinguishing tubes surrounded by and connected to a case having a perforated
wall or walls and a perforated top, the arrangement being such that the air flows
through the perforated wall and around the wick tube or tubes on its way to the
flame.
2. In a miner's safety lamp in which an extinguishing tube or extinguishing tubos
is or are attached to and move with another perforated casing as referred to in the
previous claim, an interior tube or ferrule K in combination with an interior casing L.
sliding over it for the purpose of preventing the escape of oil if the lamp be overturned
substantially as described and illustrated.
3. In a miners safety lamp an extinguishing tube or extinguishing tubes attached to
a perforated casing M. having a perforated top M' in combination with a plate N.
provided with arms or projections N¹ N' for taking under catches O. O. and a spiral
spring for forcing the extinguisher upwards when released substantially as described
and illustrated.
4. In a miner's lamp a cylindrical parallel chimney with a perforated top in
combination with tubular perforated stays through which the air to support combustion
enters substantially as described and for the purpose specified.
5. I also claim the improved miner's safety lamp with extinguisher suitable for a
duplex, flat, or round wick or wicks constructed, arranged, and operating substantially
as described with reference to the drawings.
Dadalih: 10th 1. of Mauch Can thancond sicht hundred and sighte sicht