Improvements in Extinguishing Mechanism for Central-draught or Round-wick Oil Lamps.
Year: 1890

page_text: Date of Application, 12th Apr., 1890
Complete Specification Left, 28th July, 1890-Accepted, 27th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Extinguishing Mechanism for Central-draught or
Round-wick Oil Lamps.
I, HENRY CLAY WEBB, 74 Church Road, Croydon, Surrey, Grocer, do hereby
declare the nature of this invention to be as follows:-
This invention is an extinguisher for central air draught or round burner lamps
for oil and consists of about eight more or less segments of thin metal plates, con-
verging from a larger diameter to a smaller one, and hinged on a movable metal tube,
and having a right angle motion each of the plates are shaped so as to lap a small
portion of its neighbour on one side and is bent or recessed to fit over the part lapped
so as to keep the under side flush when closed, two or more of the plates have pro-
jections at the back of hinge having a small hole through which two or more metal
uprights pass upwards to a shoulder the upper part being bent over outwards in the
form of a hook, the tube is made to work easily over the burner of lamp and two or
more stops slotted to slide on pins on outside of tube and hooked to flange on bottom
of burner allowing the rise sufficiently to bring the hinges to the level of top of
burner, a lever passes through the cap of lamp and is bent inside in the form of the
letter and being slotted both sides fits on pins in the sides of uprights near the
bottom so that when the plate tube is raised to the limit of the stops by
the lever it pushes the plates over to an horizontal position on to the wick and
extinguishes the flame, two or more vertical springs are used at the back of plates
under projections to assist in giving a quick motion to and in holding the plates firmly
on the wick, the lever being connected direct with plates by means of the uprights
ensures the perfect working of same, when the extinguisher is open the plates stand
flat against the burner the tops of plates being just below the top of burner.
Dated this 11th day of April 1890.
HENRY CLAY WEBB.
COMPLETE SPECIFICATION.
Improvements in Extinguishing Mechanism for Central-draught or
Round-wick Oil Lamps.
I, HENRY CLAY WEBB, of 74, Church Row, Croydon, in the County of Surrey,
Grocer, 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 improved mechanism for extinguishing oil lamps having
round wicks, and it consists essentially in the employment of a number of thin metal
plates which are hinged or jointed to a tube sliding upon the wick tube of a lamp and
of such shape that each plate overlaps one of the adjacent plates.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which
Figure 1 is a sectional elevation of a lamp burner provided with extinguishing
mechanism constructed according to my invention, the extinguisher being represented
in its "off" position, that is to say, in the position which it occupies while the lamp is
alight:
Figure 2 is a plan of the same, the dome of the burner being removed:
Figures 3 and 4 are views similar to Figures 1 and 2 respectively but shewing the
extinguisher in its "on" position, that is to say, in the position which it occupies to
extinguish the flame :
Figure 5 is a sectional elevation of a wick tube and extinguisher shewing the

page_text: arrangement of springs for ensuring the inward turning of the segmental plates when
the sliding tube is raised:
Figure 6 is a view similar to Figure 5 illustrating a modified arrangement for
ensuring the in-turning of the said plates :
Figure 7 is an elevation of the parts shewn in Figure 6 and at right angles
thereto.
Similar letters of reference indicate corresponding parts in all the figures.
a indicates the wick-tube of the burner, 6 the gallery and
parts being of ordinary construction.
the dome, all the said
d is the tubo sliding upon the exterior of the wick tube and e, e are the plates
'pivoted to the same at f, and adapted to close inwards over the wick.
As represented in Figures 1 to 4 these plates are of a substantially oblong form,
except that the side of each plate which is pivoted to the tube d is curved to
correspond with the contour of the wick-tube and the said plates are arranged in such
a manner that each one overlaps one of the adjacent plates at one end as will be
clearly seen by reference to Figure 4, the object of this arrangement being to ensure
that all the plates shall close over the wick, no one of them being capable of turning
down without all the others turning down with it. The said plates are advantageously
slightly curved (as shewn most clearly in Figures 2 and 3) to cause them to lie as
closely as possible against the wick-tube and thus occupy a comparatively small space.
I frequently, however, make the plates flat except that the underside of that part of
each plate which overlaps the adjacent plate is recessed in order that the several plates
shall lie closely upon the top of the wick-tube when the lamp is extinguished.
g is a lever which-is pivoted in the-lower part of the gallery b, and provided at one
end with a fork h engaging with pins on the sliding tube d in such a manner that,
when the said lever is depressed from the position shewn in Figure 1 to that shewn
in Figure 4, the said tube d will be elevated to extinguish the flame.
It will be noticed that the weight of the plates e is on the inner side of the
pivots, so that, when the tube is raised the weight of the said plates themselves
will cause them to fall inwards over the wick as shewn in Figure 3.
In some cases it may be advisable to provide means for positively moving the
plates when the tube is raised and for this purpose I advantageously employ
one or more springs i, as shewn in Figure 5 which is or are secured to the sliding
tube d and adapted to bear upon a projection ; or projections j, j formed integral
with the plates e.
In cases where the use of springs is considered objectionable I advantageously
employ the arrangement shewn in Figures 6 and 7 in which k, k indicate bars
sliding vertically upon guides 1, 1 on the tube d, which bars at their lower ends
have connected to them the arms of the fork of the extinguisher lever g and at
their upper ends bear against the undersides of the projections j, j on the plates e, e.
With this arrangement, when the lever g is depressed the bars k (by pressing against
the projections) will raise the tube d without moving relatively to the said tube
until the said plates have moved sufficiently far above the top of the wick-tube when
the said bars k, k, owing to their being able to move for a short distance independently,
will turn the said plates over the flame.
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:-
1. An extinguisher for a round wick lamp consisting of a series of plates hinged or
jointed to a tube sliding upon the wick tube and adapted when the sliding tube is
raised to close inwards over the wick, substantially as described.
2. A lamp extinguisher comprising a series of plates hinged or jointed to a tube
sliding upon the wick tube of a lamp, the said plates being so arranged that one will
overlap the other, substantially in the manner, and for the purpose, described.
3. The combination with a lamp extinguisher of the kind hereinbefore described of

page_text: bars sliding upon the tube to which the plates are jointed and bearing against pro-
jections upon the said plates, substantially as, and for the purpose, described.
4. The manufacture and use of lamp burners provided with extinguishing
mechanism, substantially as hereinbefore described and illustrated in the accompanying
drawing.
Dated the 28th day of July 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.