IMPROVEMENTS IN LAMPS
Year: 1883

page_text: LETTERS PATENT to Robert Ogden of Manchester, and Robert James
Anderson of Liverpool both in the County of Lancaster for an Invention
of "IMPROVEMENTS IN LAMPS
"
PROVISIONAL SPECIFICATION left by the said Robert Ogden and Robert
James Anderson at the Office of the: Commissioners of Patents on the
6th February 1883.
ROBERT OGDEN of Manchester and ROBERT JAMES ANDERSON of Liverpool, both
in the County of Lancaster. "IMPROVEMENTS IN LAMPS"
The object of our Invention is to extinguish the lights of lamps automatically if
the lamp be upset or moved to any fixed degree out of the perpendicular thereby
preventing accidents caused by explosion or fire.
In applying our Invention to a table lamp having an ordinary duplex or other
burner fitted with sliding extinguishers we employ a small vertical spindle or pin
which passes through the centre and lower part of the burner into the oil reservoir:
a small metal disc is secured to the bottom of this spindle: below and in contact
with this disc is another disc of about the same size secured to the upper end of a
spindle which is suspended by means of a ball on the spindle in a bracket attached
to the lower portion of the burner: the other end of the spindle is weighted and
is free to swing in any direction
The sliding extinguishers are lowered in order to light the lamp by the ordinary
lever to which a spring is attached the end of this lever which is inside the
burner frame is then caught and held by a small trigger pivoted to the frame. This
trigger is immediately over the small metal disc and vertical spindle acted on by
the weighted spindle previously described.
If the lamp when burning is upset or inclined to a sufficient angle the weighted
spindle and lower disc swing and raise the upper vertical spindle thus releasing the
trigger which closes the extinguishers and puts out the light.
The angle at which the trigger acts to extinguish the light may be adjusted and
set to any degree desired.
We have described our Invention as applied to an ordinary oil lamp but it is
equally applicable to movable lamps of all kinds whether carried by hand or
otherwise.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Robert Ogden and Robert James Anderson in the Great Seal
Patent Office on the 6th August 1883.
ROBERT OGDEN, of Manchester and ROBERT JAMES ANDERSON, of Liverpool, both
in the County of Lancaster. " IMPROVEMENTS IN LAMPS
"
The object of our Invention is to extinguish the lights of lamps automatically if
the lamp be upset or moved to any fixed degree out of the perpendicular, thereby
preventing accidents caused by explosion or fire.
In applying our Invention to a table lamp having an ordinary duplex or other
burner fitted with sliding extinguishers, we employ a small vertical spindle or pin
which passes through the centre and lower part of the burner into the oil reservoir:
a small metal disc is secured to the bottom of this spindle: below and in contact
with this disc is another disc of about the same size secured to the upper end of a
spindle, which is suspended by means of a ball on the spindle, in a bracket attached
to the lower portion of the burner: the other end of the spindle is weighted and is
free to swing in any direction.
The sliding extinguishers are lowered in order to light the lamp, by the ordinary
lever to which a spring is attached the end of this lever which is inside the
burner frame, is then caught and held by a small trigger pivoted to the frame.
This trigger is immediately over the small metal disc and vertical spindle, acted on
by the weighted spindle previously described.
If the lamp, when burning, is upset or inclined to a sufficient angle, the weighted
spindle and lower disc swing and raise the upper vertical spindle thus releasing the
trigger which closes the extinguishers and puts out the light. The angle at which
the trigger acts to extinguish the light may be adjusted and set to any degree
desired.
We have described our Invention as applied to an ordinary oil lamp, but it is
equally applicable to movable lamps of all kinds whether carried by hand or
otherwise.
And in order that our Invention may be fully understood and readily carried
into effect we will proceed to describe the accompanying Sheet of Drawings
reference being had to the figures and letters marked thereon.
Fig. 1 is an elevation of a lamp to which our Improvements are applied. Fig. 2
is an elevation with part of the frame removed and Fig. 3 a plan of a burner fitted
with our Improvements. Fig. 4 is a detached view of a spring trigger or catch.
Fig. 5 is an elevation with part of the frame removed of a burner in which a
weighted lever is used instead of a spring catch and Figs. 6 and 7 are detached
views of the weighted lever. Figs. 8 and 9 are side views and Fig. 10 a plan of a
modification of our Invention. Figs. 11 and 12 are two views of another modifi-
cation and Fig 13 is a detached view of the upper spindle and disc.
Similar letters refer to similar parts throughout the several views.
In Figs. 1 to 4.-a is an ordinary table lamp with a duplex or other burner
b fitted with sliding extinguishers c: a small vertical spindle d passes through the
centre and lower part of the burner b into the oil reservoir: a small metal disc d¹
is secured to the bottom of the spindle d: below and in contact with the disc d' is
another and similar disc e secured to the upper end of a spindle e¹ which is
weighted at the other end e² and suspended by means of the ball ea in the
bracket fattached to the lower portion of the burner. The weighted spindle e' is
thus free to swing in any direction. To allow the lamp to be lighted the sliding
extinguishers c are lowered by the ordinary lever g which is pivoted to the frame

page_text: at g and to which a spring g³ is attached: the end of this lever g is then caught
and held by a small trigger h with a spring h¹ and pivoted to the frame at h².
This trigger h is immediately over the spindle d and disc d' acted on by the disc e
and weighted spindle e¹.
If the lamp, when burning, is upset or inclined to a sufficient angle the weighted
spindle e¹ and lower disc e swing and raise the upper disc d' and spindle d thus
releasing the trigger h which closes the extinguishers c and puts out the light.
The angle at which the trigger acts to extinguish the light may be adjusted and
set to any degree desired.
Figs. 5, 6 and 7 show the weighted lever i with the catch which may be used
in place of the trigger h thereby dispensing with the spring h¹.
In Figs. 8, 9 and 10 neither spring trigger h nor weighted lever i are required as
the spindle d is bent near the upper end at an angle and acts directly upon the
lower side of the lever g as near the pivot gl as may be required to slide the
extinguishers c and thus put out the light. The dotted lines indicate the relative
positions which the weighted spindle, discs, and extinguishers would occupy if the
lamp were upset or tilted to one side. It is obvious, however, that in such a case
the lamp would be out of perpendicular instead of the weighted spindle.
In Figs. 11, 12 and 13 the bracket f is shown secured to the collar a¹ of the
Jamp instead of to the burner b as previously shown. This arrangement enables
us to use larger discs and is also more convenient as the weight is not removed
from the lamp when the burner is lifted out to renew the wicks, fill the oil
reservoir or for other purposes.
Having stated the nature of our Invention and described the manner of
performing the same
We declare that we claim
1. The improvements in lamps, substantially as and for the purposes herein
shown and described.
2. In a lamp, the use or application of a weighted spindle suspended in a
bracket by a ball or other form of universal joint for the purpose of automatically
extinguishing the light when the lamp is upset or inclined to a certain angle
substantially as herein described.
3. The discs & and e substantially as and for the purposes herein shown and
described.
In witness whereof I the said Robert Ogden for myself and on behalf of the
said Robert James Anderson have hereunto set my hand and seal this third day
of August One thousand eight hundred and eighty three.
ROBERT OCDEN
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