Improvements in Paraffin Lamps.
Year: 1887

page_text: VUMI LEIE DI MULTIVALI,
Improvements in Paraffin Lamps.
We, ISAAC SHERWOOD Junr., and FREDERICK SHERWOOD, trading as Isaac
Sherwood & Sons, of 44, 46, 48, & 50 Granville Street Birmingham, in the county
of Warwick Lamp Manufacturers 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:-
In the accompanying drawings the strong lines represent a section of the lamp in
its proper vertical position, the dotted lines shew the lamp in an inclined position as
if being upset.
The object of this invention is to extinguish the lamp without lowering the cotton,
or blowing down the chimney, also to make the movement automatic in its action,
i.e. so that when the lamp is tilted or accidentally upset, or turned over it shall auto-
matically extinguish itself, and thereby prevent danger by explosion, combustion, or
otherwise.
This is done by means of a weight A of globular or other suitable shape hanging
to the bottom of the rod B the said rod having a ball or universal joint C sufficiently
far from the weight to give the required power and sufficiently long above the joint
to give the required movement for operating a concave cup or plate D, of cone or
other suitable shape, the said concave cup being attached to the bottom of a rod E
which operates the extinguisher at the top by means of a pin F or other attachment
to the sliding vertical plate G. The extinguisher working on the pivot H and being
operated on by an arm at I extending from the vertical sliding plate.
The lower rod with the ball joint and weight are contained in the base of the lamp
which is made hollow for the accomodation of the same and has a bar or other support
for the bearing.

page_text: The upper rod has the concave plate in the base of the lamp (or in such a position
that it may be operated on by the lower rod) and then runs up through a tube through
the oil vessel to the extinguisher at the top.
Thus it will be perceived that the tendency of the weight on the rod is to keep the
said rod upright and opposite the centre or highest part of the cone shaped plate
when the lamp is upright and that when the lamp is tilted or moved out of the upright
the top of the rod works on the sides or towards the outer edge of the cone, thus
raising the top rod and operating the extinguisher, the extinguisher and other
mechanism automatically regaining their normal position again by gravitation as the
lamp is replaced in its vertical position.
The vertical sides & to the concave plate are for the purpose of preventing the rod
from getting outside the plate.
Fig. 2 illustrates a modification of the extinguisher with a slot J at a suitable angle
for closing by means of a pin K attached to the sides of the vertical sliding plate of
the extinguisher.
The said pin as the plate moves upwards in the slot draws the extinguisher over the
burner, the extinguisher working on the pivot L.
Fig. 3 illustrates a modification for working the elevating plate D, and consists of
a ball M resting in the centre of the plate N which is preferably inclined towards the
centre with the elevating plate D above it, which is preferably concave but it may
be flat.
Thus it will be perceived that as the lamp is tilted, the ball rolls towards the outer
edges of the elevating plate as shewn by dotted lines and causes it to move up and
extinguish the lamp. The ball may be limited in its movement by means of a piece
of tubing encircling it, fixed either to the sides of the lamp or to the bottom plate.
The wick tube may be continued from the collar down into the reservoir as shewn
at O fig. 1 for the purpose of preventing any flame or spark coming into contact with
any gas which may have collected in the top of the reservoir.
The tube may be made of flat or corrugated metal, the latter being an advantage
as it affords a greater capillary attraction, this applies to all lamps having a flat burner
whether extinguisher or not.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. An extinguisher operated on by means of a pin or other suitable attachment to
the vertically sliding plate, in combination with a vertically moving rod closing with
an upward motion as hereinbefore described.
2. A concave plate of cone or other suitable shape, for operating the top rod as
hereinbefore described.
3. A weighted rod having its bearing on a ball joint as hereinbefore described and
for the purpose specified.
4. A weighted rod hanging on a ball joint and operating a concave plate which
again operates the extinguisher as hereinbefore described.
5. The said concave plate having the extended vertical sides as hereinbefore described
and for the purpose specified.
6. The rod or plate inside the base of the lamp in combination with the ball joint
or the rolling ball as hereinbefore described and for the purpose specified.
7. An extinguisher safety lamp operated on by a weighted rod and consisting
of the parts arranged and combined as substantially set forth and for the purpose
specified.
8. An extinguisher lamp operated on by means of a rolling ball as substantially
set forth.
9. The said rolling ball in combination with the bottom plate as substantially
set forth.
10. The said rolling ball in combination with the top plate as substantially set
forth.

page_text: 11. The said rolling ball in combination with the top and bottom plate as substan-
tially set forth.
12. An extinguisher operated on by a rolling ball and consisting of the parts
arranged and combined as substantially set forth and for the purpose specified.
13. An extinguisher worked by means of a vertically moving pin in the inclined
slot as hereinbefore described and illustrated at Fig. 2.
14. The extension of the wick tube in flat burners to nearly the bottom of the
reservoir, the said extension being attached to the collar, as hereinbefore described
and for the purpose specified.