Improvements in Extinguishing Apparatus for Oil and Spirit Lamps.
Year: 1887

page_text: Date of Application, 16th Nov., 1887
Complete Specification Left, 15th Aug., 1888
Complete Specification Accepted, 9th Nov., 1888
Improvements in Extinguishing Apparatus for Oil and Spirit
Lamps.
I, THOMAS HENRY HARVEY, of Rose Villa, Church Road, Bexley Heath, in the
County of Kent, Commercial Traveller, do hereby declare the nature of my said
invention to be as follows:-
My invention relates to such oil and spirit lamps as are constructed for hanging
upon or against a wall; and has for its object the automatic extinction of the flame,
in case the lamp should be accidentally thrown down; and, in addition thereto, a
simple method of operating the appliance by hand.
In carrying out my invention, I fit an open frame, or other sliding piece of metal,
which rests against the back of the lamp. At the upper end of this slide 1 form an
eye or loop, and the lower end of the same slide is attached to one end of a lever.
The other end of this lever passes through an opening in the chimney carrier, and
underneath the moon, where it meets with the lower end of a balanced extinguisher,
pivotted on a pin across the chimney holder.
When the lamp is hung upon a nail, the loop of the slide is also placed on and
supported by the nail, whereby the slide is held up, in its highest position. The
lower end of the slide supports one end of the lever, and the other end of the lever
keeps the extinguisher away from the burner, thus allowing the lamp to burn as
usual. In case the lamp should be accidentally displaced, the loop of the slide ceases
to be sustained by the nail. The slide being thereby lowered, the end of the lever
connected therewith is likewise lowered; the other end of the lever rises and actuates
the extinguisher, which passes over and close to the wick, thereby extinguishing the
flame.
Additional appliances are fitted either to the slide or the lever, for extinguishing
the flame, and for removing the extinguisher for the purpose of trimming and lighting,
and to enable it to be removed without extinguishing the lamp.
15th Nomban 1887
GEO. DOWNING,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Extinguishing Apparatus for Oil and Spirit
Lamps.
I, THOMAS HENRY HARVEY, of Rose Villa, Church Road, Bexley Heath, in the
County of Kent, Commercial Traveller, 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 such oil and spirit lamps as are constructed for hanging
upon or against a wall and has for its object the automatic extinction of the flame in
case the lamp should be accidently thrown down, and in addition thereto a simple
method of operating the appliance by hand.
In carrying out my invention I fit an open frame or other sliding piece of metal
against the back of the lamp. The upper end of this sliding frame is provided with
an eye or loop and the lower end engages with one end of a lever. The other end of
this lever passes through an opening in the chimney carrier or "gallery" where it
engages with the lower end of an extinguisher suitably pivotted and weighted to keep
the apparatus out of action unless acted upon by the sliding frame.
Additional appliances are in some cases fitted either to the slide or lever for
extinguishing the flame at will and to enable the lamp to be lifted without the
automatic extinguishing apparatus coming into action.
I will now proceed to describe the manner in which I preferably carry out my
Invention, reference being had to the accompanying drawing.
Fig. 1 is a side elevation partly sectional and fig. 2 a back elevation of a common
hanging lamp fitted with a simple form of the apparatus of my invention.
A is the sliding frame constructed of stout iron brass or copper wire sliding in
guides a³. It is shaped to form a loop at a for engaging with the nail or hook upon
which the lamp is suspended. The end a² passes through a slot at in the back of the
lamp and is flattened out to form a convenient thumb piece. The other end a¹ is in
this case shown level with the bottom of lamp. The apparatus is here shown in its
normal position i.e. when the extinguisher is out of action.
Bis a light lever constructed preferably of brass and pivotted to the "gallery" of
lamp at b by a pin which can be easily taken out when it is desired to remove the
lever for the purpose of unscrewing the burner. The end of this lever B engages
with sliding frame A and the other end 2 engages with the extinguisher lever ().
C is the extinguisher lever pivotted at c to the wick-holder of burner. The upper
end is provided with an extinguisher and the lower end 2 engages with lever B
and is weighted sufficiently to overcome the weight of long arm of lever B so that
the extinguisher will be thereby kept out of action unless overcome by the superior
weight of sliding frame A.
D is a filling hole with screw cap to allow lamp to be filled without removing the
burner.

page_text: The action of the apparatus is as follows:-
So long as the weight of sliding frame is taken by the nail or hook upon which the
lamp hangs, the weighted end c² of extinguisher lever keeps the apparatus out of
action. But should the lamp come off its support or should the said support give
way, the weight of sliding frame will operate the lever B and put out the flame by
passing the extinguisher c¹ over it.
The end a¹ of sliding frame prevents the apparatus coming into action when the
lamp is placed on a table shelf or the like, but should the lamp be tilted forwards or
sidewards the sliding frame extinguishes the flame as before.
The lamp may be carried about from place to place without the apparatus coming
into action by grasping the lamp in the vicinity of the thumb piece a² and placing
the thumb or fingers on the said thumb piece so as to stop the action of the sliding
frame, but should the lamp fall from the hand from any cause the sliding frame
operates as before.
The sliding frame is in some cases placed in front instead of behind the back of
lamp and if desirable can be formed out of sheet metal instead of wire. It may be
also of any desired configuration.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I wish it to be particularly
understood that I do not bind myself to the exact details hereintofore described and
illustrated but I do declare that what I claim is :-
1. In oil or spirit lamps arranged to hang against a wall, a sliding frame fitted to
the back of lamp having suitable levers and extinguisher, the said sliding frame
tending by its weight to extinguish the flame except when kept out of action by the
nail or like support upon which the lamp is hung.
2. The combination, construction, and arrangement of automatic extinguisher as
shewn in figs. 1 and 2 of accompanying drawing and substantially as described.
Dated this 15th day of August 1888.
THOMAS HENRY HARVEY.