An Improvement in Electric Arc Lamps.
Year: 1898

page_text: An Improvement in Electric Arc Lamps.
CHARLES OLIVER, 61, Wilson Street, Finsbury, London, E.C., Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to an improvement in electric arc lamps wherein is employed
a tapered feeding rod engaged by a clutch or the like said rod tapering in such a
direction that the further feeding of said rod can take place only by a further disen-
gagement of said clutch in addition to that of a previous feed such lamps
necessitating a further movement of the regulating mechanism beyond or in
addition to a previous feeding movement to further feed the carbons together
whereby the arc is kept uniform throughout the total burning of the carbons. This
invention may also be applied to other lamps working on the same lines.
The invention is as follows.-
To a suitable moveable part of the regulating mechanism for example towards one
end thereof of a transverse bar pivotted midway or thereabouts between a shunt and
a series solenoid and carrying cores working in said solenoids I arrange & attach a
cord chain or equivalent of suitable length and weighted if necessary advantageously
uniformly throughout its length the other end of which chain &c. I attach towards
the upper end of one of the carbon or carbon-holder rods in such wise that said
carbon rod is not limited in its full run by said cord chain &c. also that the whole
or part of said weight of said cord chain &c. may throughout the full run of said
carbon rod by its (the said rod's) movement be borne sufficiently gradually from
said rod to said regulating mechanism or vice versa (i.e. the weight of said chain &c.
is carried from the one to the other) and also in such wise that the increased or
diminished weight on said regulating mechanism will compensate for the different
position of said cores in their solenoids & so keep the arc burning uniformly
throughout the lengths of the carbons.
Instead of attaching said cord chain &c. to said carbon rod as aforesaid I may
attach it to a pulley or wheel or other moveable part worked in conjunction with the
carbon rods so that as they are moved said pulley &c. rotates or moves winding on
it or unwinding off it or lifting or lowering said cord chain &c. so that less or more
weight may be borne by the regulating mechanism according to the position of the
Or instead of utilising
carbon rod or rods for the purpose herein before described.
the weight of a cord chain &c. a spring may be applied to a part of the regulating
mechanism the tension of which may be varied by a cord or the like working on
said pulley &c.
Dated this Thirty-first day of January 1898.

page_text: An Improvement in Electric Arc Lamps.
I, CHARLES OLIVER, of 61, Wilson Street, Finsbury, London, E.C., Engineer,
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 improvement in electric arc lamps, wherein is
employed a tapered feeding rod engaged by a clutch or the like said rod tapering in
such direction that the further feeding of said rod can take place only by a further
disengagement of said clutch in addition to that of a previous feed (i.e. the clutch
has to be opened wider and wider or further and further at each feed as the feeding
progresses) such lamps necessitating successive further movements of the regulating
mechanism beyond or in addition to each previous feeding movement to further
feed the carbons together, the object being to keep the arc uniform throughout the
total burning of the carbons. This invention may be used in conjunction with
other lamps working in principle as hereinbefore described.
The improvement is as follows:-
To a suitable movable part of the regulating mechanism for example towards one
end of a transverse bar pivoted midway or therabouts between a shunt and a series
solenoid and carrying cores working in said solenoids I arrange and attach a cord
chain or equivalent of suitable length and weighted if necessary advantageously
uniformly throughout its length the other end of which chain etc. I attach either
to the carbon or carbon holder or carbon holder rod in any suitable manner
advantageously towards the upper end of one (or both) of the carbon holder rods in
suchwise that said carbon is not limited in its full run by said cord chain etc. also
that the whole or part of said weight of said cord chain etc. may throughout
the full run of said carbon by its (the said carbon's) movement be borne sufficiently
gradually from said carbon to said regulating mechanism or vice-versa (i.e. the
weight of said chain etc. or part thereof is carried from the one to the other) and
also in suchwise that the increased or diminished weight on said regulating
mechanism will compensate for the different position of said cores in their solenoid³
and so keep the arc burning uniformly throughout the length of the carbons.
Instead of attaching said cord chain etc. to said carbon as aforesaid I may attach
it to a pulley or wheel or other movable part worked in conjunction or in
connection with the carbons so that as the latter are moved said pulley etc.
rotates or moves winding on it or unwinding off it or lifting or lowering said
cord chain etc. so that less or more weight may be borne by the regulating
mechanism according to the position of the carbon or carbons for the purpose
hereinbefore described.
Or instead of utilising the weight of a cord chain etc. spring may be
applied to a part of the regulating mechanism the tension of which may be
varied by a cord or the like working on said pulley etc.
Referring to the accompanying drawings:
Fig. 1 is a view in elevation of part of au arc lamp showing my present
improvements applied thereto and Fig. 2 is view looking in the direction of the
arrow 2 Fig. 1.

page_text: A chain a provided with weights a throughout its length (or otherwise
arranged or with varying weights as desired) is attached at one end a¹ to one
end of the transverse rock bar b (or it may be attached direct to the core c of
the solenoid s) while the other end a² of said weighted chain a is attached to
the carbon rod d which latter is carried by the flexible connection e passing
over pulley and connected to the tapered rod g the position of which latter
is controlled by the clutch this said clutch or the movable part thereof being
carried on or connected to the aforesaid rock-bar b.
d¹ is one carbon rod holder supported by the rod d; d² being the lower carbon
supported in said holder d¹.
g is the other carbon rod holder supported by the rod g; g² being the upper
carbon supported in said holder g¹.
It will thus readily be seen that as the rod g is tapered therefore the movable end h¹
of the clutch operating lever h² must descend further and further to permit each
feeding downward of the said tapered rod g the end 61 of the rock-bar b as same is
allowed to descend by the solenoid 8 thus descending with the end a¹ of the chain a
while on the other hand as the rod d is raised at each feed thereby the end a² of said
weighted chain attached to said rod d is raised and consequently it follows that the
weight of the chain a which was on the end 61 of the rock-bar b at the start of the
lamp (i.e. after trimming) is (either wholly or partially) gradually transferred there-
from on to the rod d which latter at the start may have little or no weight of the
chain a ax thereon.
In this manner I thus compensate for variation in the "pull" of each solenoid
respectively upon its core as the position of the latter in or with respect to its
relative solenoid is altered by the progression of the feed of the lamp.
In Figs. 3 and 4 I have illustrated modified arrangements of carrying my inven-
tion into practice; in Fig. 3 the pulley f is provided with a secondary pulley or
drum fx thereon on to or off which is wound one end of a flexible connection m
such as a cord which latter is attached to said drum fx while the other end of said
cord m is attached to the end a² of said weighted chain a the other end a¹ of the
latter being attached to the rock-bar b as before (or in the arrangement shown in
Fig. 4 said weighted chain is dispensed with and in lieu thereof said connection m
is attached to a spring o the other end of which latter is attached at o' to said rock-
bar b) so that as the feeding of the lamp causes the connection e passing over the
pulley f to thereby revolve the latter consequently the connection 'm will be wound
up on or unwound off the pulley or drum fx and thus same will either lift or lower
the weights ax in the chain a in the arrangement shown in Fig. 3, or increase or
diminish the tension of spring o in the arrangement shown in Fig. 4, and thereby
either increase or relieve the weight or strain on the rock-bar b.
It will be obvious that the weighted chain a ax (in the arrangement shown in
Fig. 3) and the part m may be made continuous that is all in one part if
desired.
Having now particularly described and ascertained the nature of
my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. The herein-described improved method of compensating for variation in the pull
of each solenoid respectively upon its core as the position of the latter in or with
respect to its relative solenoid is altered by the progression of the feed of the lamp
which consists in increasing or diminishing a weight or strain put upon some
working part of said regulating mechanism.
2. In electric arc lamps wherein the carbons are fed together at each successive
feed by a further feeding movement of the regulating mechanism in one direction
in addition to the movement in the same direction required for each previous feed-
providing a weighted chain or spring or equivalent connected to said regulating
mechanism and means to increase or relieve the weight or strain thereof ou said
regulating mechanism substantially as and for the purposes hereinbefore described.

page_text: 3. Electric arc lamps constructed combined and arranged to act substantially in
the manner and for the purposes hereinbefore described.
Dated this 31st day of October 1898.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.