IMPROVEMENTS IN LAMPS
Year: 1879

page_text: LETTERS PATENT to John Wakefield, of 47, Theodore Street, Birmingham,
in the County of Warwick, and William Edward Fisher, of Worcester Works,
Clement Street, Birmingham aforesaid, for the Invention of "IMPROVEMENTS
IN LAMPS."
PROVISIONAL SPECIFICATION left by the said John Wakefield and William
Edward Fisher at the Office of the Commissioners of Patents on the 14th
February 1879.
JOHN WAKEFIELD, of 47, Theodore Street, Birmingham, in the County of
Warwick, and WILLIAM EDWARD FISHER, of Worcester Works, Clement Street,
Birmingham aforesaid. "IMPROVEMENTS IN LAMPS."
This Invention has for its object improvements in lamps.
We apply extinguishers to lamps in which flat wicks are employed in the following
manner :- -Upon the wick tube, or upon each of the wick tubes where more than
one wick is used, we arrange a slider, and the slider can be moved up and down
upon the wick tube by means of a lever. The lever has a fixed fulcrum, its inner
end is forked and embraces a stud upon the side of the slider.
Or in lamps
with two wicks the lever has a double fork at its inner end to work the two
extinguishers.
The slider has lips jointed to it, one on either side, and the arrangement is such
that when the slider is raised these lips which then project above the top of the
burner tube close together and extinguish the flame.
The lips are controlled by a cam piece fixed upon the end of the burner tuve
or other part of the burner suitable for the purpose. An arm from each of the
lips bearing upon the cam piece causes them to close when the extinguisher is
raised.

page_text: When the slider is moved down the upper end of the burner tube separates the
lips of the extinguisher.
In some cases we make the extinguisher with one moveable lip only.
Where two wicks are employed we use but one.turn button to raise and lower
them. On the-axis-of-the-button-there are two worms which gear with pinions,.
one on each of the axes of the spurs or wheels, by which the wicks are raised.
The axis of the turn-button is carried by springs which admit of either worm being
lifted-out-of-gear-when-it-is-desired-to-operate-upon-one only_of_the wicks...
We sometimes substitute pinions for worms-upon- the-axis-of-the-turn-button-and-
arrange the axis to slide to carry the pinions-into-and-out-of-gear, ⠀⠀

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Wakefield and William Edward Fisher in the Great Seal
Patent Office on the 14th August 1879.
JOHN WAKEFIELD, of 47, Theodore Street, Birminghain, in the County of
Warwick, and WILLIAM EDWARD FISHER, of Worcester. Works, Clement Street,
Birmingham aforesaid. IMPROVEMENTS IN LAMPS."
This Invention has for its object improvements in lamps.
-
We apply extinguishers to lamps in which flat wicks are employed in the following
manner: Upon the wick tube, or upon each of the wick tubes where more than
one wick is used, we arrange a slider, and the slider can be moved up and down"
upon the wick tube by means of a lever. The lever has a fixed fulcrum, its inner.
end is forked and embraces a stud upon the side of the slider; or in lamps
with two wicks the lever may have a double fork at its inner end to work the two
extinguishers.
The slider has lips jointed to it, one on either side, and the arrangement is such
that when the slider is raised these lips, which then project above the top of the
burner tube close together and extinguish the flame.
The lips are controlled by a cam piece fixed upon the end of the burner tube or
other part of the burner suitable for the purpose. An arm from each of the lips
bearing upon the cam piece causes them to close when the extinguisher is raised.
When the slider is moved down the upper end of the burner tube separates the
lips of the extinguisher.
In some cases we make the extinguisher with one moveable lip only.
Where two wicks are employed we use but one turn button to raise and lower
them. On the axis of the button there are two worms which gear with pinions,
one on each of the axes of the spurs or wheels, by which the wicks are raised. The
axis of the turn button is carried by springs which admit of either worm being
lifted out of gear when it is desired to operate upon one only of the wicks.
We sometimes substitute pinions for worms upon the axis of the turn button, and'
arrange the axis to slide to carry the pinions into and out of gear.
In order that our said Invention may be most fully understood and readily
carried into effect we will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a front elevation, Figure 2 is a side elevation, Figure 3 is a longi-
tudinal section, and Figure 4 is a transverse section of a two wick burner illus-
trating our Invention both in respect to the construction of the extinguishers and
also to the mechanism by which the wicks are raised and lowered. a, a, are the
wick tubes, and b, b; are sliders thereon; b¹ is a stud fixed to the sides of the
sliders, it connects them together and it is embraced by the forked end of the lever c.
The lever c has its fulcrum at c', and it serves to move the sliders up or down upon
the wick tubes. In place of the arrangement shown each slider may have a separate
stud, and the inner end of the lever c may be provided with a double fork, but the
means of raising and lowering the sliders upon the wick tubes forms no part of our
Invention. d, d, are lips, jointed one on either side to the upper part of each slider,
and these close together over the top of the wick tubes whenever the sliders are
raised, but when they are lowered the wick tubes come between the lips and keep
them apart. e, e, are fixed cam pieces which ensure the closing of the lips together
when the sliders are raised. The joint pin or axis by which each lip is connected
with the slider has fixed on its end an arm & which bears against the cam piece e,
and when by the raising of the sliders the enlarged heads of the cam pieces are
brought between the arms d¹ the lips are made to fold together. The two lips may
also be closed by using a spring or weight at either end of the extinguisher case, as
shewn in the Drawings at Figures 4 a, 4b, and 4 c.

page_text: We would remark that we are aware that before the date of our Patent, extin-
guishers have been made consisting of a slider with a single lip closing against the
side of the slider but the moveable lip has in no case been actuated by a cam piece
in the manner which we have described, and our method of actuating the lip is
applicable to single lip extinguishers.
gear
fis the turn button for raising and lowering the wicks, and both wicks are con-
trolled by this one button. It has upon its axis two worms f¹, f', and these
with the pinions g, g; upon the same axis with the pinions g, g, are the spurs g¹, g¹,
-the points of which penetrate the wicks, and when the spurs are turned_raise or
lower them according to the direction of the motion. h, h, are springs on which the
-bearings_for_the_axis_of_the_turn_button_are_formed.or.carried. If the button f-be-
pressed downward the springs yield and allow the further worm f' to rise out of
gear with its pinion g, and if the button be. now turned only the nearer wick is
operated upon. Similarly if the turn button be pressed upwards the nearer worm
passes out of gear and the further one remains in gear, and when the button is
turned gives motion to the corresponding wick. Pinions may be employed in place
of the worms. Figure 5 shows in plan such an arrangement. i, i, are the spurs
entering the wick tubes and engaging with the wicks. k, k, are toothed pinions on
the axes of the spurs. When the parts are in the position in which they are repre-
sented in the Figure they both engage with a long pinion upon the axis of the
turn button, but the axis is capable of sliding in either direction, and the pinion
can so be put out of gear with either of the pinions whilst it remains in gear with
the other. A spring may be applied tending to hold the axis of the pinion in the
position in which it gears with both of the pinions k, or if the spring be dispensed
with the axis may be able to slide such a distance only as to remove it from gear
with one of the pinions whilst it always remain in gear with the other.
I
Having thus described the nature of our said Invention and the manner of per-
forming the same we would have it understood that we claim,
First. The extinguisher consisting of the slider b and two lips d, d, closing
together over the top of the wick tube when the slider is raised, substantially as
described.
Second. The extinguisher consisting of a slider b with a lip or lips d, actuated by
a cam piece e, substantially as described.
Third. The means for controlling both the wicks of a two wick burner by one.
turn button moving both wicks simultaneously, or one wick only, substantially as
described.
In witness whereof, we, the said John Wakefield and William Edward Fisher,
have hereunto set our hands and seals, this Fifth day of August, in the
year of our Lord One thousand eight hundred and seventy nine.