Improved Means for Extinguishing Oil Lamps.
Year: 1892

page_text: Date of Application, 23rd July, 1892
Complete Specification Left, 24th Apr., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improved Means for Extinguishing Oil Lamps.
HARRY CHARLES PEIRSOx of Number 5 Tavistock Villas St. Paul's Road
Tottenham in the County of Middlesex Salesman do hereby declare the nature of
this invention to be as follows:-
To obtain a self acting extinguisher for oil lamps.
The extinguisher may be fitted to duplex or other lamps and is enclosed in a
brass case and fitted between wicks extending about two inches into the reservoir of
the lamp. Inside of this case is a bolt with a pear shaped bottom knob and round
the bolt is fitted a fine spiral spring.
On each side of the bolt is fitted an hinged pin and at the bottom of the bolt is
fixed half circular grips to hold the centre bolt above the pear shaped knob. The
side pins are kept in place and guided by an angular drilled sliding weight and when
the lamp is overturned allows the centre bolt to escape and force a cover over the
flame.
25rd July 1
1002.
HARRY CHARLES PEIRSON.
COMPLETE SPECIFICATION.
Improved Means for Extinguishing Oil Lamps.
I HARRY CHARLES PEIRSON of 5 Tavistock Villas, St. Paul's Road, Tottenhamn,
in the County of Middlesex, Salesman, 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 :-
This invention which is applicable to oil lamps with circular or with flat wick
burners has for its object to provide means for automatically forcing an extinguishing
device over or on to the top of the wick when the lamp is overturned, said means
being so constructed and arranged as to be inoperative when the lamp is only
slightly shaken or tilted, as for example, when the lamp is carried from rooin to
room.
The accompanying drawings shew a duplex burner with my invention fitted
thereto,
Figure is a partly sectional elevation shewing the normal position of the
parts;
Figure 2 is a similar view shewing the position of the parts when the lamp is
overturned;
Figure 3 is a section of part of the burner taken at right angles to Figure 1 ;
and
Figure 4 is an enlarged detail view.
In the duplex burner shewn in the drawings, the extinguisher tubes A which
slide vertically on the wick tubes B are secured to an upright piece C having a
shoulder C which rests upon the top of a bolt D, and an extension C², which fits
loosely in a cavity D' made to receive it in the bolt D (see Figures 3 & 4). E is
the handle of a lever pivotted at F to the outside of the burner whose other end G
engages with, or is secured to the upright C so that by depressing the handle E,
the upright C can be raised and the lamp thus extinguished when desired, the
cavity D serving as a guide for the extension C2 ensuring the straight line motion
of the upright C. When the pressure is removed from the handle E, the upright C
falls to its original position.'

page_text: The bolt D passes through a guide tube H secured to the base L of the
burner and is furnished at its lower end with a pear shaped or bulbous knob K.
Its upper end is provided with a flange or collar D2 against the underside of
which bears one end of a spiral or other suitable spring J whose other end
bears on the base L of the burner. The tendency of the spring is therefore
to force the bolt D upwards and this is what does happen when the catches M
which grip the bolt D just above the knob K are released. These catches M
are rigidly secured to or formed in one with rods N pivotted or binged at their
upper ends to the base of the burner. O is a weighted piece which is bored with
holes corresponding in position to the tube H and the rods N of the catches M, said
holes being sufficiently large to allow the weight ( to slide freely over the tube H
and rods N. The holes which encircle the rods N are bored in a direction inclined
towards the central-belt, the angle of inclination being such as to allow of the
weight slipping easily over the rods N. As the weight slips towards the base of
the burner the rods are turned on their pivots and separated by the slipping of
the weight towards the pivots or hinges of the rods N. Or the holes which
encircle the rods N may be inclined at a different angle to the angle of said
rods so that as the weight slides over them the rods are turned on their pivots
or hinges and away from the bolt. The weight O is fitted over the tube H
and the rods N before the latter are pivotted or hinged to the base of the
burner, and when the burner is upright the weight will fall to the bottom of
the rods N and will draw the catches M together and cause them to grip the
bolt D just above the knob K thus holding the bolt down. This is the position
shewn in Figure 1. When the burner is upset or tilted sufficiently to allow the
weight to slide towards the base of the burner, the holes in the weight will turn the
rods on their pivots or hinges outwards from the bolt which is thereby released, and
the spring thereon will come into action and force the extinguishers over the wick.
This is the position shewn in Figure 2. To reset the bolt, the burner is placed
upright and the handle E of the lever is raised, thereby depressing the arm G and
forcing down the bolt until the catches M grip the bolt above the knob.
The mechanism beneath the base of the burner is preferably cased in so as to
prevent the access thereto of the oil, or gas generated from the oil, and to prevent
the wicks becoming entangled with the mechanism. The invention may be fitted
to oil lamps in the course of construction, or it may be fitted to oil lamps at present
in use.
To adapt the invention to circular wick burners which are extinguished by the
lowering of the flame spreader, the spring would require to be arranged so as to
shoot the bolt downwards, and the knob would require to be reversely formed on
the belt, that is to say, with its thickest part at the bottom instead of at the top as
shewn in the drawings. The invention is also adaptable to flat wick burners which
are extinguished by the turning over of an extinguishing device. The modifications
necessary for this as well as for adapting the invention to other forms of oil
lamps will be understood by persons acquainted with the trade without further
explanation.
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 is :-
1. Means such as herein described for extinguishing oil lamps, consisting of a
spring bolt working through a tube on the burner base, pivotted or hinged rods
carrying catches to grip said bolt, a weight sliding freely over said bolt tube and
rods and so constructed that when sliding towards the base of the burner the
said weight turns the rods on their pivots or hinges so as to release the catches
from the bolt, substantially as described and shewn in the accompanying drawings.
2. The combination with an oil lamp, of a sliding weight, a spring bolt and catches
for said bolt pivotted or hinged to the burner base all arranged so that when the

page_text: weight slides towards the burner base, the catches are released from the bolt which
is then actuated by the spring thereon thereby extinguishing the lamp substantially
as described and shewn and for the purpose stated.
3. The combination of the various parts forming my improved means for
extinguishing oil lamps all arranged so as to operate substantially in the manner
and for the purpose herein before set forth and illustrated in the accompanying
drawings.
Dated this 24th day of April 1893.
F W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.