improvements in Lamp Extinguishers.
Year: 1894

page_text: Date of Application, 6th Nov., 1894
Complete Specification Left, 6th Aug.. 1895-Accepted, 7th Sept., 1895
PROVISIONAL SPECIFICATION.
improvements in Lamp Extinguishers.
We, GEORGE BUTWELL, of 5 Mount Terrace, Balsall Heath, Birmingham, in
the County of Warwick, Machinist and EDWARD ROBERTS, of 128 Park Road
Aston, Birmingham, Gentleman, aforesaid, do hereby declare the nature of our said
invention to be as follows:-
Our invention has for its object improvements in lamp extinguishers and is
applicable to lamp burners of all kinds by which the lamp can be readily and
easily extinguished while our invention is so simple and can be so cheaply manu-
factured that it does not materially add to the cost of the lamp. It also has the
advantage of an automatic action in case of the lamp being over turned or
thrown.
In carrying our invention into effect we mount the extinguisher upon a horizontal
spindle which is supported by the perforated under-casing of the burner. The
extinguisher consists of a flat top plate which is connected by an upright support
with the horizontal spindle. Upon the spindle and outside the burner I mount a
lever arm which is weighted sufficiently to retain the extinguisher clear of the
wick. To extinguish the light it is only necessary to raise the lever thus shutting
the extinguishing plate over the lighted wick and thereby extinguishing the flame
after which the weight of the lever brings back the plate to its normal position
clear of the wick ready for relighting.
In case of the lamp being overturned the impetus or swing of the fall creates a
rebound of the lever thus automatically extinguishing the light.
Dated this 19th day of December 1894
GEORGE BUTWELL.
EDWARD ROBERTS.
Improvements in Lamp Extinguishers.
We GEORGE BUTWELL of 5 Mount Terrace Wenham Street Balsall Heath
Birmingham Manufacturer and EDWARD ROBERTS of 128 Park Road Aston
Birmingham Gentlemen, 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 :—
Our invention has for its object improvements in lamp extinguishers by which
we provide an extinguisher which can be so cheaply manufactured as to be applied
to the cheapest lamps upon the market without materially altering their cost.
It is also so simple in working that the most uneducated cannot fail to understand
its use while it is most certain in action and thus prevents the dangerous mode of
extinguishing by blowing down the glass.
In order that our invention can be clearly understood and more easily carried
iuto practice we have appended hereunto a sheet of drawings upon which we have
fully illustrated the nature of our said improvements.

page_text: Figure 1 is a gross section through a burner with one of our extinguishers
attached shewn in its normal position.
Figure 2 is a similar cross section to Figure 1 but shewing the extinguisher in
position for extinguishing the light.
Figure 3 is a sectional view shewing the extinguisher in action.
Figure 4 shews the simple form of metal from which the extinguisher is
formed.
In carrying our invention into effect we cut out a piece of sheet metal to the
form shewn by Figure 4 and this we bend with the cross part a at right angles or
nearly so to the stem a' and this stem is bent around and soldered at a to the
spindle 6 this spindle is then inserted into two of the ordinary air holes f¹ formed
in the side of the burner fafter which the dropper d and nut bare fixed in
position as shewn. It will thus be readily seen that to extinguish the light it is
only necessary to raise the dropper & which brings the part a over the lighted
wick and extinguishes the light as shewn in Figure 2 but immediately the
dropper is released the extinguisher falls back into its normal position as shewn
at Figure 1. The mode of attachment may be varied as the spindle 6 bearing the
dropper d may be first inserted in the burner and the extinguisher a be afterwards
attached by threading the end into a slot formed in the spindle and afterwards
bending the end of the stem a' over.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1st. The improvements in lamp extinguishers substantially as and for the
purpose herein set forth and shewn upon the accompanying drawings.
2nd. In lamps the extinguisher mounted and operated substantially as herein set
forth and shewn.
Doted this 5th do Ant 1003
GEORGE BUTWELL.
EDWARD ROBERTS.