Improvements in Mechanism for Extinguishing Lamps.
Year: 1891

page_text: Date of Application, 28th Nov., 1891
Complete Specification Left, 26th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Extinguishing Lamps.
We, ALFRED HENRY GRIFFITHS, Managing Director, and THOMAS BAKER
SMITH, Foreman of Works, and EVERED AND COMPANY LIMITED, all of Surrey
Works, Smethwick, near the City of Birmingham, do hereby declare the nature of
this invention to be as follows:-
This invention relates to an improved combination and arrangement of mechanism
for the automatic or nonautomatic extinguishing of lamps, and is applicable to
single or double wick burners.
It consists as follows, as applied to a double wick burner :-The extinguishing
shutter boxes are made as usual to slide upon the wick tubes, and provided with the
ordinary shutters and springs. These boxes are further connected to each other
by a suitable cross bar.
These boxes are forced upwards by means of a spring, so that their tendency is
always to be up and closed over.
This may be done by means of a leg extending from the cross bar downwards
through the lower part of the burner, and enclosed in a tube, or other suitable
form, in which is enclosed a spiral spring for the purpose already named.
Again. In the interior of the burner and at the one side, a joint is formed to
which is secured the one end of a lever. This lever passes through or upon the
cross bar or other suitable part of the boxes or the leg. At the other end of this
lever is secured the upper end of a link, which said link passes downwards through
a slotted opening in the body of the burner, and at its lower end is secured to the
fulcrum of a weighted lever. The inner end of this latter lever is short, and
formed into a trigger catch, whilst at its outer (longer) end is attached a weight.
Upon the external of the burner and lying below the slot beforenamed, a catch
is formed, which may be made by means of an inclined downward plate, its lower
end forming the catch.
Under this catch, the lever catch is made to engage.
Thus by pulling down the weighted lever and engaging its catch with the fixed
catch upon the burner, the boxes are simultaneously lowered, and the lamp is ready
for burning.
While in the vertical position the weighted lever more than compensates the
spiral spring which acts upward upon the boxes and thus they are held down.
In case however the lamp is overturned, the spiral spring is more than sufficient
for the now reduced power of the weight and trigger catch, consequently the trigger
is released and the boxes raised, and the light put out.
Instead of applying the spiral spring to the leg of the shutter boxes, it may be
applied to the fixed joint of the cross lever.
In order to extinguish by hand, it is only necessary to lift the weighted end of
the lever when the trigger is freed, and the extinguishing is effected as before.
Dated this 27th day of November 1891.
CHARLES T. POWELL,
Applicants' Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Mechanism for Extinguishing Lamps.
1
We, ALFRED HENRY GRIFFITHS, Managing Director, and THOMAS BAKER
SMITII, Manager of Works, and EVERED AND COMPANY LIMITED, Manufacturers,
all of Surrey Works, Smethwick, near the City of Birmingham, 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 an improved combination and arrangement of mechanism
for the automatic or nonautomatic extinguishing of lamps, and is applicable to
single or double wick burners.
In order to more clearly explain this our invention, we have appended hereunto
an illustrative sheet of drawings upon which are figures and numbers of reference
similar numbers referring throughout the several views to the same thing or part.
Fig. 1, is a general section of a burner showing this our invention.
Fig. 2, is a part plan view of the invention.
Fig. 3, is a sectional view of the invention showing its action, when the lamp is
turned over or upset, and the automatic extinguishing is effected.
Figs. 4 & 5, are detailed front and end views of the extinguishing shutter boxes
and sliding leg.
Figs. 6 and 7, are side and plan views in detail of the cross bar lever.
Figs. 8 & 9, are side and plan views in detail of the levers connecting link.
Figs. 10 & 11, are side and plan views in detail of the weighted catch lever.
Fig. 12, is a detailed front view of catch plate.
1, is the lamp burner body upon which is carried the gallery 2, chimney holder 3,
and cone 4, in the ordinary manner, these being shown only in order to show the
relation and function of those parts forming this our invention. The extinguishing
shutter boxes 5, are made as usual to slide upon the wick tubes 6, and provided
with shutters 7, and springs 8. These boxes are further connected to each other by
a suitable cross bar 9. These boxes are forced upwards by means of a spring, so
that their tendency is always to be up and closed over. This may be done by
means of a leg 10, extending from the cross bar downwards through the lower
part of the burner, see Figs. 1, 3, 4 & 5, and enclosed in a tube 11, or other suitable
form, in which is enclosed a spiral spring 12, for the purpose already named.
Again. In the interior of the burner and at the one side, a joint is formed at 13,
to which is secured the one end of a lever 14. This lever passes through or upon
the cross bar 9, or other suitable part of the boxes or the leg. At the other end of
this lever 14, is secured the upper end 15, of a link 16, which said link passes
downwards through a slotted opening at 17, in the body of the burner, and at its
lower end 18, is secured to the fulcrum 19, of a weighted lever 20. The inner end
of this latter lever at 21, is short, and formed as a trigger catch, whilst at its outer
(longer) end is attached a weight 22.
Upon the external of the burner and lying below the slot beforenamed, a catch
is formed, which may be made by means of an inclined downward plate 23, its
lower end forming the catch.
'
Under this catch 23, the end 21, of the lever 20, is made to engage, as seen in
Fig. 1. Thus by pulling down the weighted lever 20, and engaging its catch
end 21, with the fixed catch 23 upon the burner, the boxes 5, are simultaneously
lowered, and the lamp is ready for burning.
While in the vertical position as shown in Fig. 1, the weight upon the lever 20,
more than compensates the force of the spiral spring 12, (which acts upward upon
the boxes) and thus they are held down.
In case however the lamp is overturned, as seen in Fig. 3, the spiral spring 12, is
more than sufficient for the now reduced gravitating power of the weight 22, and
trigger catch 21, consequently the trigger is released and the boxes 5, raised, and the
light put out as illustrated.

page_text: In order to extinguish by hand, it is only necessary to lift the weighted end of
the lever 20, when the trigger is similarly freed, and the extinguishing is effected
ns before.
Having now particularly described and ascertained the nature of this our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
In oil lamp extinguishing mechanism the combination with the body 1, wick
tubes 6, sliding boxes 5, spring 12, and inclined catch plate 23, of the cross bar
lever 14, having attached thereto the link 16, and weighted lever 20, having catch
end 21, all substantially as set forth and shown.
Dated this 25th day of August 1892.
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicants' Agent.