Year: 1886

page_text: Date of Application, 4th Dec., 1886.
Complete Left, 18th May, 1887.
Complete Accepted, 21st June, 1887.
do hereby declare the nature of this invention to be as follows :—
This invention relates to certain appliances in connection with one, or more
extinguishers of lamp wicks whether the lamp has one, or more wicks.
The appliances consist of a weight suspended by its neck in a slot, of slightly larger
dimensions than the neck itself, of a fixed bar attached to the shell of the burner.
Instead of the slot in the bar, a hole only may be made sufficiently large for
freedom of movement of the weight in any direction of tilt or inclination to which the
lamp may be put.
The weight has a head of disc shape, and on this, one end of a jointed lever is free
to bear, the other leg of the lever having a catch or claw, on which the extinguisher
lever presses under the action of a spring which is arranged near the wick tube.
The weight is outside the burner and is placed in such a position that it may be
actuated by hand for ordinary extinguishing purposes.
When the lamp is tilted in any direction the disc on the suspended weight assumes
an angle to the plate on the lever and raises it whereby the catch is withdrawn and
releases the extinguisher.
I have referred to one weight, but there may be two, which when separated by a fall
or inclination of the lamp in any direction will cause the release of the extinguisher
lever; and instead of the extinguisher lever pressing upon the claw, it may be
arranged for fitting under it, by which means the extinguisher lever would have a
rising motion instead of a falling one.
of Dreamhan 100K
H. GARDNER,
166, Fleet Street, London,
Agent for the said W. Snelgrove.

page_text: I WILLIAM SNELGROVE, of 42, Hillsboro Road, North Dulwich, Surrey, Engineer
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 relates to certain appliances in connection with extinguishers of lamp
wicks whether the lamp has one or more wicks whereby an automatic release of the
extinguisher takes place if the lamp be tilted beyond a given angle such as an upset or
fall over from accident or other cause.
The appliances consist of a weight suspended by its neck in a slot, of slightly
larger dimensions than the neck itself, in a fixed bar attached to the shell of the
burner.
Instead of the slot in the bar, a hole only may be made sufficiently large for freedom
of movement of the weight in any direction of tilt or inclination to which the lamp
may be put.
The weight has a head of disc shape, and on this, one end of a jointed lever is free
to hear, the other leg of the lever having a catch or claw on which the extinguisher
lever presses under the action of a spring which is arranged near the wick tube.
The weight is outside the burner and is placed in such a position that it may be
actuated by hand for ordinary extinguishing purposes.
When the lamp is tilted in any direction the disc on the suspended weight assumes
an angle to the surface of the lever and raises it, whereby the catch is withdrawn and
releases the extinguisher.
I have referred to one weight, but there may be two, which when separated by a fall
or inclination of the lamp in any direction will cause the release of the extinguisher
lever and instead of the extinguisher lever pressing upon the claw it may be arranged
for fitting under it, by which means the extinguisher lever would have a rising motion
instead of a falling one.
My invention is represented in the annexed drawings. Figure 1 is an elevation of
a lamp burner in an upright position and with the extinguisher mechanism in the
positions the several parts occupy when the lamp is burning, except that the
extinguisher lever is in section to show the claw on which it rests.
Figure 2 is an external elevation of the same burner, tilted over to the left hand;
Figure 3 showing the claw withdrawn with the burner tilted over to the right.
These two figures are only given as examples because the head of the weight being
circular in shape gives releasing motion to the claw from whatever radii the lamp may
take its tilt.
Figure 4 shows a part sectional view of the same burner, the dotted lines
representing the position of the extinguisher lever when set, and the full lines when
it is released, the extinguisher proper being over the wick tube or tubes.
The extinguisher is in this case shown as of the flap kind pressing against the tube
by a spring and provided with a pin riding in a curved fork of a lever pivotted to the
burner casing. In Figure 5 the extinguishers are constructed pivotted to fall over on
the wick tubes when lifted by the lever, which in this view as also in Figure 6, has an
upward motion when released from the claw.
In the above figures, A is the weight. B its neck and Cits head. Dis the holed or
slotted fixed bar by which the weight A is suspended. E is the lever bearing on the

page_text: head and free to move on its pivot pin F. G is the claw or detent on the leg H of
the lever E. I is the lever of the extinguisher J and P the spring for actuating same.
Figures 7, 8 and 9 show two weights A, A, hung from a pivot pin M common to
both, but they may be hung on separate pins.
The pin M is in a pendent N hung from a pivot O at right angles to the pin M so
that the weights A may freely swing in any direction. These weights have
shoulders K. K on which the lever I. when set, rests by means of an oval shaped
loose bead or ferrule L on the lever I so that a tilt of the lamp from any angle will
cause one or other of the two weights to rock or move away from its neighbour
and the bead or ferrule to turn or tumble and disengage itself for the lever I to
escape.
I am aware that pendent weights have been employed in connection with extinguisher
appliances of oil lamps but these have either actuated the extinguisher direct against
which such direct action there are many and obvious practical disadvantages, or in the
case of indirect action as in my invention, these pendents have generally been
arranged either centrally as to have an oscillation in the neck just below the screen or
at a greater distance therefrom, but in both cases so that the weight is immersed in the
oil in the reservoir, or the weight has been suspended centrally and near to the bottom
of the lamp support or foot the rod of the extinguisher appliance being within a
central tube to separate it from the oil container.
There are many inconveniences arising from this central or interior fixing, in the
first place the incrustation or carbon of the wicks from the action of the extinguisher
falls into and through the orifices and tends to clog and prevent the proper action or
working of the appliances besides which the necessary looseness of the fittings leaves
orifices through which vapour from the oil may pass to the flame and render the lamp
more or less dangerous from risk of explosion. In the next place the weight having to
displace the oil is retarded in its oscillatory motion as to practically interfere with the
extinguishers acting when they should be most active again should the cotton or
cottons used in such a lamp be so long as to form a twist in the oil vessel when the
burner is attached the ends of the cotton in the oil reservoir are just as likely to twist
themselves within range of the pendent weight as to twist away from it and in such
a case the weight would be more or less locked and no motion of the extinguishers
would take place in the case of an accidental upset.
The aforesaid centrally pendent weights are usually hung by a sphere on a frame
and are subjected to accumulation of sediment from inpurities in the oil and to dust
and dirt settling on the frame by which an oscillation of the weight would be seriously
impeded.
In other cases the great distance of the weight from the extinguisher prevents the
ready action.
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 :-
:-
1. In connection with a lamp extinguisher, the outside freely suspended weight A,
the claw lever or detent E, and extinguisher lever I arranged and acting in the manner
and for the purpose described with reference to Figures 1 to 6 of the annexed
drawings.
2. The two suspended weights A, A, and bead L for supporting and for releasing
the lever I as described with reference to Figures 7, 8 and 9 of the annexed
drawings.
H. GARDNER,
166, Fleet Street, London,
Agent for the said W. Snelgrove.