Pectric Are Lamps.
Year: 1898

page_text: PS I Pectric Are Lamps.
I, CHARLES OLIVER, of 61, Wilson Street, Finsbury, London, Engineer, do here-
by declare the nature of this invention to be as follows:-
This invention has for its object improvements in and relating to the arrange-
ment and construction of arc lamps in which a block system is employed i.e. arc
lamps in which a further movement of the regulating mechanism is required
beyond the position of the regulating mechanism in a previous feeding movement to
further feed the carbons together.
To the underside of the crown or top plate which may be of any suitable or usual
form I attach a perpendicularly depending tube or column the lower end of which
is attached to the base or bottom plate of the lamp--such column or tube advan-
tageously being arranged centrally with respect to said plates.
To the underside of the crown plate I attach the usual or any suitable solenoids
and the lower end of each of the cores working therein is attached to a cradle or
rocking frame which latter is pivotted on the central tube or to a support carried
thereby.
In order to compensate for the different amount of pull on said cores according
to the different positions of the cores in said coils or solenoids I use either singly
or in combination any of the following means (or equivalent) to attain this end.
I may pivot the aforesaid cradle at a point above or below advantageously above
a line drawn between the two core pivots on said cradle or I may attach to said
cradle a series of weights so arranged that as the cradle moves said weights are
picked up from their rigid support gradually or individually and the weight borne
by said cradle which will therefore vary in accordance with the position of said
cradle, or said cores or said cradle or the striking link working on said cradle may
rock upon the circumference of a circle or from one to another pivot or I may
arrange a spring so as to produce more or less tension on said cradle according to
the position of said cradle or the pull or driving weight of the lamp may be made
to vary for instance by making the tapes connecting the carbon holders pass over
pulleys having a snail upon them, or I may employ means such as were invented
by me and were described in my Provisional Application for Patent No. 2485
of 1898.
A dash pot is connected to the underside of the cradle-advantageously an
inverted dash pot that is a movable hood or cylinder (connected to one of the cores
or to the underside of one end of the cradle) is lifted off or lowered upon a piston
attached by a link to the aforesaid base plate carried on or by said central column,
the piston advantageously being provided with a valve so that the cylinder is only
retarded in one direction.
From the underside of said base plate depends perpendicularly (but other than
centrally) a guide tube or guide column which at its lower end carries a cross bar
somewhat of a crescent like form the ends of said crescent like cross bar being
provided with or carrying eyes or guide-ways for the two lower carbon holder
rods i.e. in a double carbon lamp.
In a double carbon lamp according to the present invention—the lower carbon

page_text: holder rods are guided through the base plate and by means of the crescent like
cross bar aforesaid, and between these points the said lower carbon holder rods are
each provided with a curved horizontally extending arm the end of which latter
is forked or formed of a semi-circular shape to embace partly around said depending
guide column so as to thereby prevent said lower carbon rods rotating or turning on
their axes or if desired I may use a separate guide column for each lower carbon
holder rod respectively.
The holes through which the lower carbon rods pass are insulated in any suitable
manner the guide forks also being insulated from either the rod or guide tube.
The upper carbon rods are advantageously formed other than circular in_cross
section and also may advantageously be slightly tapering that is narrowing down-
wards and are fed downwards and such feed is controlled by clutches or devices
operated by and from said cradle or rocking frame in any well known or other
suitable manner.
These upper carbon rods aforesaid are guided through holes in the base plate
and through holes in a bracket advantageously carried on or by the central tube
the clutches advantageously working or engaging on the rods between these two
bearings.
If desired I arrange that I do not get a central pull on these upper carbon
holder rods at the lifting point on the clutches and for this reason I sometimes
employ forked or other plates engaging on said rods and pivotted some little
distance away from the bearings and so arranged that said plates take the pressure
of said rods on their bearings and move with said rods when being lifted or moved
by the coils but on feeding taking place move with friction owing to the central
hang of said rods. For this same purpose I sometimes employ rollers or
balls in bearings.
The upper end of the upper carbon rod is attached by a flexible connection
reeving or passing over a pulley or wheel (supported on the underside of the crown
plate or to a bracket fixed on said central tube) and thence descending to and
connected to the upper end of the lower carbon holder rod and if necessary
insulated.
If desired I may dispense with one said pair of carbon holder rods and form a
single carbon lamp as aforesaid or in order to get the arc central in the lamp I
may arrange and mount the upper carbon holder rod in the aforesaid central column
the lower part of which latter is cut away sufficiently for the aforesaid clutch
mechanism to operate thereon and to control same as before described or the lower
part of said central tube or column may be completely cut away and the lower
end of same carried on a platform or support for instance an inverted U shaped
device provided therefor upon the upper side of the base plate-means being pro-
vided at the upper end of said central tube for a pulley or wheel and over which
the flexible connection (between the two carbon holder rods) will pass into said
tube and descend vertically therein to the upper end of the said upper carbon
holder rod therein.
I, CHARLES OLIVER, of 6.1, Wilson Street, Finsbury, London, Engineer, do here-
by declare the nature of this invention and in what manner the same is to be

page_text: performed to be particularly described and ascertained in and by the following
statement:
This invention relates to the arrangement and construction of arc lamps in which
a block system is employed particularly arc lamps in which a further movement
5 of the regulating mechanism is required beyond the position of the regulating
mechanism in a previous feeding movement to further feed the carbons together.
To the underside of the crown or top plate which may be of any usual or suit-
able form I attach a perpendicularly depending tube or column the lower end of
which is attached to the base or bottom plate of the lamp-such column or tube
O advantageously being arranged centrally with respect to said plates.
To the underside of the crown plate I attach the usual or any suitable solenoids
and the lower end of each of the cores working therein is attached to a cradle or
rocking frame which latter is pivoted on the central tube or to a support carried
thereby.
In order to compensate for the different amount of pull on said cores according
to the different positions of the cores in said coils or solenoids I use either singly
or in combination any of the following means (or equivalent) to attain this end.
I may pivot the aforesaid cradle at a point above or below advantageously above
a line drawn between the two core-pivots on said cradle; or I may attach to said
cradle a series of weights so arranged that as the cradle moves said weights are
picked up from their rigid support gradually or individually and the weight borne
by said cradle which will therefore vary in accordance with the position of said
cradle; or said cores or said cradle, or the striking link working on said cradle,
may rock upon the circumference of a circle or from one to another pivot; or I
may arrange a spring so as to produce more or less tension on said cradle according
to the position of said cradle; or the pull or driving weight of the lamp may be
made to vary for instance by making the tapes connecting the carbon holders pass
over pulleys having a snail upon them; or I may employ means such as were
invented by me and set forth in the specification and drawings of my Patent
No. 2485 of 1898. A dash-pot is connected to the underside of the cradle advan-
tageously an inverted dash-pot that is a movable hood or cylinder (connected to
one of the cores or to the underside of one end of the cradle) is lifted off or lowered
upon a piston attached by a link to the aforesaid base plate carried on or by said
central column the piston advantageously being provided with a valve so that the
cylinder is only retarded in one direction.
From the underside of said base plate depends perpendicularly (but other than
centrally) a guide tube or guide column which at its lower end carries a cross bar
somewhat of a crescent-like form the ends of said crescent-like cross bar being
provided with or carrying eyes or guide-ways for the two lower carbon holder
rods i.e. in a double carbon lamp.
In a double carbon lamp according to the present invention-the lower carbon
holder rods are guided through the base-plate and by means of the crescent-like
cross bar aforesaid, and between these points the said lower carbon holder rods are
each provided with a curved horizontally extending arm the end of which latter
is forked or formed of a semi-circular shape to embrace partly around said depend-
ing guide column or otherwise arranged so as to prevent said lower carbon rods
rotating or turning on their axes or if desired I may use a separate guide column
for each lower carbon holder rod respectively.
The holes through which the lower carbon holder rods pass are insulated in any
suitable manner the guide forks also being insulated from either the rod or guide
tube.
The upper carbon rods are advantageously formed other than circular in cross
section and also may--for constant current burning-be slightly tapering that
is narrowing downwards and are fed downwards and such feed is controlled by
clutches or devices operated by and from said cradle or rocking frame in any
well-known or other suitable manner.
These upper carbon holder rods aforesaid are guided through holes in the base-

page_text: plate and through holes in a bracket advantageously carried on or by the central
tube the clutches working or engaging on the rods between these two bearings;
and means may be provided such as a pin fixed in one of these bearings engaging
in a longitudinal slot in the upper carbon holder rod to prevent the latter turning
upon its axis.
The upper end of the upper carbon holder rod is attached by a flexible connec-
tion reeving or passing over a pulley or wheel (supported on the underside of the
crown plate or to a bracket fixed on said central tube) and thence descending to
and connected to the upper end of the lower carbon holder rod said flexible con-
nection being insulated from the lower carbon holder rod.
If desired I may dispense with one said pair of carbon holder rods and relative
mechanism and form in the aforesaid manner a single carbon lamp and in such case
that is in a single lamp in order to get the arc central in the lamp I may arrange
and mount the upper carbon holder rod in the aforesaid central column between
the crown and base plates the lower part of which latter is cut away sufficiently
for the aforesaid clutch mechanism to operate on said rod and to control same as
before described, or the lower part of said central tube or column may be com-
pletely cut away and the lower end of same carried on a platform or support for
instance an inverted U-shaped device provided therefor upon the upper side of the
base-plate means being provided at the upper end of said central tube for a
pulley or wheel and over which the flexible connection (between the two carbon
holder rods) will pass into said tube and descend vertically therein to the upper
end of the said upper carbon holder rod therein.
Referring to the accompanying drawings:
Fig. 1 shows the construction of a double lamp according to my present inven-
tion and Fig. 2 is a view at right angles thereto.
Fig. 3 shows a single carbon lamp and Fig. 4 is a view at right angles thereto.
Similar letters of reference indicate corresponding parts throughout.
a is the crown plate to the underside of which I affix one end of the perpendicu-
larly and centrally arranged depending tube or column the lower end of which
latter is attached to the base or bottom plate c of the lamp.
d d are the solenoids fixed to the underside of the crown plate a.
e el are the cores working in said solenoids the lower part of each said core e el
being attached (pivoted) at e to the cradle or rocking frame f which latter is
pivoted at f to the central tube b.
g is the cylinder of a dash-pot fixed to the lowermost end of the core c¹ the
piston in said cylinder g being carried on the piston rod h attached (pivoted)
at h to the base plate plate c-the piston h being provided with a valve so that the
cylinder is only retarded in one direction.
i is guide tube or column fixed to the underside of said base plate c and depend-
ing perpendicularly therefrom other than centrally, and at its lower end column i
carries a cross bar j of crescent-like form the ends of said crescent-like cross bar j
being provided with eyes or guideways through which pass the two lower carbon
holder rods a 1 i.e. in the double lamp Figs. 1 and 2, while in Figs. 3 and 4 only
one said arm j and one lower carbon rod are employed that is in a single lamp.
The carbon rod is guided at e¹ through the base plate c and similarly the
carbon rod ¹ is guided through the base plate at c¹ in the case of a double lamp.
y is a curved horizontally extending arm fixed to the carbon holder roda (at x*)
the end of said arm y carrying a plate yl with a curved recess therein adapted to
partly encircle the vertical column i or said arm y may be forked or otherwise
suitably formed or adapted to slide vertically upon the vertical tube i in suchwise
as to prevent the carbon holder rod (or ¹) turning upon its longitudinal axis but
without interfering with the free vertical movement of said carbon holder rod c
or ¹.
The holes and e¹ through which the lower carbon holder rods (or ¹) pass
are insulated, the guide forks y or arm y' also being insulated from either the
tube or rod a or ¹..

page_text: m is the upper carbon holder rod and m¹ the 2nd upper carbon holder rod in the
case of the double lamp (said rods advantageously being slightly taper i.e. narrow-
ing downwards) same being guided through holes in the base plate c.
n is tape or flexible connection secured to the upper end of the upper carbon
holder rod m and passing over the pulley o to the upper end of the lower carbon
holder rod a from which latter said connection n is insulated.
p is connecting rod from the cradle f (to which it is pivoted at p¹) to the clutch
lever to which it is pivoted at the clutch mechanism (operated by said
lever ) and controlling the carbon holder rod m being of any suitable or well-known
form by which the feed is controlled as said clutch or device is operated by or from
said cradle or rocking frame f as is well understood, and such clutch or device on
the rod m need not therefore be herein further described.
I thus produce an arc lamp simple in construction, reliable and steady in its
operation, and having many advantages in construction and use.
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 electric arc lamp constructed with a crown plate and base plate connected
by a centrally vertical column, solenoids affixed to the underside of the crown plate,
cores in said solenoids operating the feed regulating mechanism and a dash-pot
in connection therewith, a vertical guide column depending from the underside
of the base plate other than centrally, arms extending laterally from said guide
column through which the lower carbon holder rod passes and is guided, guide holes
in said base plate also for said lower carbon holder rods, guide holes in said base
plate and guide holes in a bracket carried by said central tube for the upper carbon
holder rods to pass through, a flexible connection between the upper end of the
two carbon holder rods passing over a guide pulley, a horizontal guide arm or
arms rigidly fixed to said lower carbon holder rods and extending towards the
aforesaid guide column depending from the base plate the end of each said guide
arm being forked to partly encircle or otherwise adapted to embrace said guide
column and slide or travel freely up and down thereon in suchwise as not to inter-
fere with the vertical movement of said lower carbon holder rod but so as to
prevent the latter rotating upon its axis, all combined, arranged and operating
substantially in the manner and for the purposes hereinbefore described.
2. The improved general arrangement and construction of electric arc lamps
substantially in the manner and for the purposes hereinbefore described and illus-
trated in the drawings hereunto annexed.
11
1000
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.