PROVIDIUNAL DE MUITIVATION,
Year: 1897

page_text: Date of Application, 1st Mar., 1897
Complete Specification Left, 1st Dec., 1897-Accepted, 22nd Jan.,
1898
PROVIDIUNAL DE MUITIVATION,
Improvements in or relating to Safety Oil Lamps. .
I, HENRY WHITEHURST, of 34, Vassall Road, Brixton, County of London, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention has for object certain detail improvements in oil lamps to pre-
vent in the case of upset the oil leaving the oil well and secondly to ensure the lamp
righting itself should it fall or slip from its resting place or from the hand of a
person when carrying it.
For the purpose of my
said invention I secure a depending tube to the burner
casing and let it dip in the oil so that the wick supply is from the interior of the
tube, the top of the tube being air tight prevents the oil rising beyond a given level
and only sufficient for the capillary attraction to feed the top of the wick or wicks.
My lamp has a semi-circular base or it has an outside semi-circular base capable of
being secured in position said base being of weighty material to give a preponderance
at the lower part so that what ever part of the lamp which first strikes the ground after
a fall it tumbles over and becomes upright.
1005
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said H. Whitehurst.
I, HENRY WHITEHURST, of 34, Vassall Road, Brixton, County of London, 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 has for object, certain detail improvements in oil lamps to prevent,
in the case of upset, the oil leaving the oil well, and secondly to ensure the lamp
righting itself should it fall or slip from its resting place or from the hand of a person
when carrying it.
For the purpose of my said invention, I secure a depending tube to the burner
casing and let it dip in the oil, so that the wick supply is from the interior of the tube,
the top of the tube being air tight prevents the oil rising beyond a given level and
only sufficient for the capillary attraction to feed the top of the wick or wicks.
My lamp has a semi-circular base, or it has an outside semi-circular base capable
of being secured in position, said base being of weighty material to give a preponder-
ance at the lower part so that whatever part of the lamp which first strikes the
ground after a fall it tumbles over and becomes upright.

page_text: My invention will be clearly understood by reference to the annexed drawings.
1
Figure represents a self-righting hand lamp in which the righting weight A is
secured in an opening or chamber in the bottom of the lamp body B from the out-
side by the angled wall C of the cavity, into which cavity molten lead is poured.
Figure 2 shows a self-righting hand lamp in which the righting weight A has a
separate bottom secured to the base of the lamp at the outside by being screwed
thereto.
Figure 3 shows a self-righting hand lamp in which the righting weight A is fixed
in the cavity by flap clips E secured to the body B at the edge of the cavity, the flaps
being then bent under the weight A and soldered to the righting weight to fix it in
place.
Figure 4 indicates a self-righting hand lamp in which the righting weight] A is
held by a tube F flanged at each end and capable of holding the righting weight
firmly and rigidly by the burred over flanges F¹, F¹.
The lamps shown have a safety tube G secured airtight in the neck Hand a wick
tube I also secured airtight in the tube G, said tube I being within the tube G,
so that the space between the two tubes is airtight at the top where they join
the neck H, the flow of oil from the oil well or tank to the wick J being from
under the two tubes G and I and dependent only on capillary action for feeding
the flame, the burner K of which is of the ordinary construction with winder K₁
for regulating the height of the wick in the well known manner.
I am aware that self-righting hand lamps are not new therefore I lay no claim
to such lamps in a broad sense, such lamps however have had the righting
weight chiefly lead poured in from the neck opening and therefore partly filling the
oil wall or tank, and have only had one tube in the interior and no wick tube below
the neck of the burner and no protection against undue flow of oil to the wick
which became more than saturated while the lamp was being carried from place to place
and caused much smoke to escape besides creating an unpleasant smell.
By my invention, the flame is kept regular whether the lamp be carried about or
otherwise, the oil only flows to the wick in quantity proportionate to consumption due
to capillary action, the main body of oil being kept from contact with the wick tube
by the safety tube. .
Having now particularly described and
tion and in what manner the same is to
claim is :-
ascertained the nature of this inven-
be performed I declare that what I
1. In a self-righting or safety oil lamp, the depending tube G of the burner casing
within which is the wick tube I, the tube G being fitted airtight at the upper part
to ensure capillary action of the wick only for feeding the flame.
2. Providing self-righting lamps with an exterior weighting base A, substantially as
set forth and shown.
3. In self-righting hand lamps, the combination of safety tube G and wick tube I
therein, with an outside affixable weighting base A as described and shown on the
annexed sheet of drawings.
The 1st day of December 1897.