Year: 1887

page_text: Date of Application, 27th Jan., 1887.
Complete Left, 21st Apr., 1887.
Complete Accepted, 8th July, 1887.
WILLIAM PATTERSON Victoria House Low Fell Durham, Machine Agent do
hereby declare the nature of this invention to be as follows
"
39
I make a lamp having a partial outward resemblance to the Lamp known as the
Stephenson but I make considerable internal changes first. I make the air which
enters the Lamp to support the flame, to pass through two perforated Metalic rings
and on the top of one of these rings is a flange which supports and guides and keeps
air tight the glass cylinder inside the wire gauze one of these rings I cause to close
automatically when gas is admitted into the lighted lamp.
I also make an improved combustion chamber, and protect the same by a circular
shield being brought down the lamp a given distance from the top of combustion
chamber, which also protects the flame when the Lamp is in high velocities of air
currants.
I also make an improved top or tibe for the Lamp by placeing a Metalic shield to
break the air currants, and I make a portion of the said tibe or top in duplicate as an
extra mode of safety with the aid of the two rings first mentioned and the combustion
chamber, and the tibe top in duplicate I can regulate the illuminating power of the
Lamp to the highest point and by automatically moveing the inner ring of the inlet
when gas is present in dangerous quantities the lamp is a perfectly safe one.
WILLIAM PATTERSON,
Victoria House, Low Fell, Durham.

page_text: b
Improvements in Miners' Safety Lamps.
WILLIAM PATTERSON, Victoria House, Low Fell County of Durham Machine
Agent do hereby declare the nature or 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 which relates to Miners Safety Lamps consists in being so
constructed as to give a good. light and to prevent the flame from being blown
through any part of the lamp by a powerful current of air even if such air be mixed
with gas to make it a highly explosive mixture as the gas cannot burn in the lamp
long enough to destroy any part of the lamp proper. The bonnet or top of the lamp
is screwed to the body of the lamp in the usual way.
Reference is to be had to the accompanying drawings forming a part of this
specification in which similar letters of reference indicate corresponding parts in all
the Figures.
Fig. 1 represents a vertical section of the lamp with the openings for the inlet of
air and the outlet for the products of combustion open and bonnet or top of lamp
placed in position and locked to the body of the lamp and oil vessel.
Fig. 2 shows a horozontal section of the automatic or self closing arrange-
ment with the fusible stretcher in position and spring so set as to move the inner
tube but I can also move the outer tube or covering in the same way.
Fig. 3 a general view of Lamp Fig. 5.
I will now proceed to describe the lamp and the several features of the invention
letter a is the automatic arrangement consisting of two tubes or cylinders hereafter
called tubes these tubes are made of brass or other suitable metal one working within
the other and close fitting is a series of holes or slots in the two tubes corresponding
with each other and is the inlet for fresh air to support the flame. c is a series of
holes or openings made at or near the top of the two tubes corrosponding with each.
other and used for the carrying off of the products of combustion-the pitch of the
said openings b and c being so that by a short horozontal movement of one tube only
the openings of both tubes are covered or closed d is a strip of gauze or other
perforated material placed over the said openings and c to prevent the flame from
passing from the inside of the tube to the outside or external atmosphere. e is a
spring fixed on the outside of tube and one end is pressing against the pin or
projection fixed in the inner tube. The purpose of the spring is to keep the
openings of the inner tube over the corrosponding solid part of the outer tube and
thus stop all ingress and egress of air into and out of the lamp-the inner tube is held
with its openings corrospondingly open with the openings in the outer tube by means
of the fusible stretcher G which stretcher is fixed in a horozontal position to the
pins H. When the lamp is placed in an explosive mixture the heat inside the lamp is
so increased that it melts or burns the stretcher in two and thus frees the inner tube

page_text: and the spring then presses the inner tube so far round that it covers the corro-
sponding holes in the outer tube and thus closes the Lamp against the admission of
all air and gas and thus all flame is extinguished within the lamp. I make the
fusible stretcher of a metal that melts at a low temperature but I prefer for
convenience to use tinned iron commonly known as tin and I solder the strip of tin
which forms the stretcher with tinners solder but I do not confine myself to this
method of fastening the stretcher together. I can also fix a fusible pin or plug
through holes in the stretcher which melts or burns in the stretcher at a low
temperture and thus frees the inner tube to move. The inner tube is held in
position by a pin or pins moving in slots both marked K which slots are made to
regulate the travel of the inner tube in a horozontal position.
The tubes a is encased with a bonnet or shield M having openings for inlet of air N
and outlets for products of combustion O this bonnet is made of iron brass or other
metal and is secured to the body of the lamp P and locked in position in the usual
way The wick flame is protected by one or two glasses W which are held in position
by the screwed ring X and for extra safety I place a cylindrical gauze Y in the inside
of the glass W and this gauze Y is held in position by the ring Z screwed into the
ring X
It will be at once apparent that some of the novel features contained in this invention
may be seperately used for the purposes as herein described but in this specification
they are shown to the best of my belief in the most complete form.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is
1st. Two tubes or cylinders a with holes or slots b and c and covering of gauze d
also spring e and pin with its covering case I also stretcher G and pins H also slots K
substantially as herein shown and described.
2nd. Cylindrical gauze marked Y which is open at both ends also screwed, rings Z
which secures the gauze at both ends to the lamp and ring X which screws in its
entirety into the bottom main ring of the lamp and gives direct control over both the
gauze Y and glasses W substantially as herein shown and described.
Dated this 20th day of April 1887.
WILLIAM PATTERSON.