Improvements in Automatic Lamp-extinguishers.
Year: 1890

page_text: Date of Application, 3rd Feb., 1890
Complete Specification Left, 3rd Nov., 1890-Accepted, 24th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Automatic Lamp-extinguishers.
I JAMES HAZLITT of Fethard in the County Tipperary Ireland Gentleman do
hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in automatic lamp extinguishers and has for
its object to provide means whereby the said lamp may be extinguished as soon as
the oil in the tank has sunk to a predetermined level.
In carrying my invention into practice I form three openings in a lamp reservoir,
one for the burner a smaller one for filling purposes and another to receive a float
carrying a vertical rod which projects outside the lamp and on the screw threaded
top of which is secured by means of nuts the ond of an adjustable crank lever. A
grooved weight capable of sliding upon a guiding rod suitably fixod in a socket on
the oil tank is held at the top thereof by the short arm of this crank lever in such a
manner that the curved lower end or beak thereof catches under a projection or
ledge formed on the said weight.
The burner is furnished with an ordinary extinguisher composed of two flaps and of
a lever projecting outside and carrying an articulated forked arm secured by a pivot
to the end thereof so as to be moveable up and down. This arm extends across the
guiding rod above mentioned and is actuated, i.e. the extinguisher is put on, when the
weight released by the crank lever falls thereon a motion which is determined by
reason of the long arm of the last-mentioned lever being depressed by the float sinking
in the oil tank. I may likewise use instead of one two guiding rods between which
the weight would slide upon suitable grooves formed therein, the two ends of such
rods meeting in the socket near the tank. In this case the articulated arm above
mentioned would pass between these rods the weight striking this arm upon a piece
of india rubber fixed at the junction of the two rods.
Dated this 3rd day of Wahrmony 1800
COMPLETE SPECIFICATION.
Improvements in Automatic Lamp-extinguishers.
I, JAMES HAZLITT, of Fethard, Co. Tip., Ireland, Gentleman, 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:—
My invention relates to improvements in automatic lamp extinguishers, and has for
its object to provide means whereby the said lamp may be extinguished as soon as the
oil in the tank has sunk to a predetermined level.
In carrying my invention into practice, I provide a float, which is placed in the oil
reservoir of a lamp, and carries a central rod, extending through an opening formed
in the top of the said reservoir, and furnished with a lid or cover. The upper end of
this rod is connected directly or by a chain with the hooked end of a lever, fulcrumed
upon the horizontal extremity of a vertical rod fixed in any suitable manner to the
side of the oil reservoir aforesaid. The above lever carries an extension at its fulcrum
having the shape of a loop, which enters the lip or projection of a weight suspended
while its outer and free extremity has the form of a hook and carries a weight
suspended thereto by a ring or link. The burner of the lamp is provided with an
ordinary extinguisher, the arm of which passes through the side of the burner and is
jointed to a link terminating with a forked end which embraces the vertical rod
aforesaid.

page_text: And in order that my said invention may be more fully understood, I have shewn
the same in the accompanying drawings in which
Fig. 1 is a front elevation of a lamp to which my improved automatic extinguisher
is applied, Fig. 2 being a vertical section of the same on the broken line of Fig. 3
which is a plan of the lamp immediately above the burner,
In the oil reservoir R is arranged a float F fixed at its upper part to a central
rod a, the upper end of which is connected by a wire chain c to a flat bar b provided
with a number of perforations. The end of this wire chain may be fixed to either
perforation of the bar & according to the depth to which the float F is allowed to sink
before operating the extinguisher.
The bar bis attached by its uppermost perforation to the hooked end of a wire
lever 1, the free end of which is likewise hooked and carries a counterweight w. This
lever is fulcrumed at d upon the upper horizontal and twisted end of a vertical rod r
fixed at its lower end to the side of the oil reservoir R. The lever Z is formed at its
fulcrum, with a lower extension having the form of a triangular loop e, upon the base
of which the lip g of the weight W constantly bears so long as the oil level in the
reservoir has not sunk to its lowermost allowable limit. The float F can be withdrawn
from the oil reservoir R through the opening of which is furnished with a lid i carrying
a central tube j through which the rod a of the float passes.
The extinguisher proper is of ordinary construction and consists of a sheath s open
on one side and surrounding the burner proper B.
This sheath is provided with two perforated lugs m. m, the ends of which carry a
pink, turning freely in these perforations, through which likewise pass the small
ends or journals of the plate o pivoting against the pin and serving to extinguish
the light. The lower part of this plate o has two lugs, between which the curved
lever p is free to move, being hinged thereto by a pin q. The end of the curved lever
which is pivoted on the pin t passes through one of the slots of the lower portion of
the burner shell or casing and is jointed to a link n terminating with a fork f which
surrounds the rod r.
The action of the extinguisher is as follows.
As the oil level reaches its lowermost allowable limit, the pull of the rod a upon
the chain c overcomes at that moment the resistance of the counterweight w, and
causes the lever to tip down towards the float, thus moving the triangular loop 7 to
the left hand side and releasing the weight W which as it falls upon the forked end f
of the link n which hitherto assumed the position shown in Fig. 2 depresses the latter
which now assumes the position shown in dotted lines in the same figure thus raising
the sheaths deflecting the plate o and extinguishing the light.
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
The improved automatic lamp extinguisher, arranged, constructed, and operating
substantially as herein described and illustrated in the accompanying drawings.
Dated this 3rd day of November 1890.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C., Agents for the Applicant.