Improvements in and connected with Arc Lamps.
Year: 1893

page_text: Date of Application, 24th Jan., 1893
Complete Specification Left, 23rd Oct., 1893-Accepted, 13th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in and connected with Arc Lamps.
I CHARLES AUGUST PFLUGER of 1007 Opera House Block Chicago Illinois
United States of America Electrician do hereby declare the nature of this invention
to be as follows:-
A check for
This invention relates to various novel features in arc lamps embodied in the
following general description. The lower carbon is preferably flat and held by set
screw the bottom of the lamp is a plate held in position by side bars having a
projecting rim or rims into which is screwed spring rods slotted at their free ends
to receive a surrounding ring; the globe is carried on a sliding support and is
provided with a pocket to collect droppings from the carbons; in this way the
globe may be moved up or down and secured by set screws. This invention
provides for the use of double upper carbons and a wide or flat carbon below. The
upper carbons are clamped in grooves by a plate and set screws or secured by ball
ends in cavities provided for them and rigidly secured by set screw. A regulating
device is arranged as follows. In a suitable frame. The fixed main circuit magnet
has its armature through which the carbon rod passes, connected by link and spring
to the upper carbon clutch. A stop is adjustably supported on a rod. A shunt
solenoid has its core secured to a pivotted frame having one end pivotted to
standards and the other to a movable cylinder of a dash-pot. The feed of the
lower carbon is by link and spring controlled by a movable or pivotted stop on a
standard. The stop is controlled by a rod attached to the armature.
the stop is carried on a link. The brush is composed of side plates which clamp
the carbon rod, tightened or loosened by a set screw carried by a pivotted support.
When the current is applied the amature of magnets lifts the rod when the clutch
engages the stop bringing the clutch to a horizontal position when it releases its
rod, but as the armature rises the rod rises, the stop is turned on its pivot and the
action of a spring dips the clutch and so make it clutch and hold the carbon rod for
feeding. This clutch moves up and down responsive to changes in the magnetization
of the solenoid and thus the lamp feeds. A cut out mechanism is as follows.
contacts are part of the shunt circuit when the magnet is energised to lift its
armature a rod attached thereto causes an arm on a pivot to be moved which
separates the contacts when they are is catch by a pawl and the current is shunted
through the lamp. As the lamp feeds, if the solenoid draws its armature or frame
down too far a rod connected therewith will engage the end of the pawl and lift it
from a notch which holds the contacts apart thereby allowing the contacts to be
brought together by a spring which cuts out the lamp. Thereupon the parts
resume their normal position and the brush rising and falling with the feeding
frame affords little obstruction to the movement of the rod.
LT1000
Two
FREDERIC PRINCE,
Agent for Applicant.

page_text: 34
I, CHARLES AUGUST PFLUGER, of 1007, Opera House Block, Chicago, Illinois,
United States of America, Electrician, 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 :-
To enable this invention to be properly understood I will proceed to describe the
same with aid of the accompanying drawings.
Figures 1, 2 and 3 are detail views of the globe holder.
Figures 4, 4, 5, 6, 7, 8, 9 and 10, details of the devices for holding double upper
carbons.
Figure 11 is an interior view of the regulating mechanism.
Figure 12, a detail or diagrammatic view of a modification of the regulating
mechanism.
Figure 13, is a detail of the carbon rod clamping brush.
These various devices need not of course be all of them embraced in the
same lamp.
A is a lower flat carbon held by the set screw B. C is a plate in the bottom of
the lamp sustained by the side bars D D and having a lower projection F with a
prolongation E into which are screw threaded the spring rods & slotted below
at H H to receive the surrounding ring J. K is the globe on the plate L having
the lower guides O which receive the rods G G and the pocket M laterally slotted
at N if desired. By this construction the globe may be moved up or down and
supported by the set screw O', at any point on the rod, or the whole may be brought
down until the globe is supported on the ring J. The pocket M receives the
fragments of the lower carbon as they fall through. All this is shown in Figures 1, 2
and 3. In Figures 4, 4, 5, 6, 7, 8, 9, and 10 is shown the means for using the
double carbons above with a wide single carbon below. P P are upper round
carbons of the usual size held closely together and retained in grooves Pi P¹, in the
plates P, by means of the clamping plate P, controlled by the thumb screw P
P is the upper carbon rod with the ball shaped piece P below which is received
into the cavities P' P8, in the plates P' P³, and the parts when suitably adjusted
may be held rigidly together by the screw P. All the parts thus far described
may evidently be used with any kind of lamp regulator.
In Figure 11 is shown a form of regulator. A' is the top B¹ the bottom of the
regulator frame. E is the fixed main circuit magnet having the armature F¹
through which the carbon rod passes and the link F which connects it with the
piston of the dash pot F3 and the spring F and link F* which connect it with the
upper or carbon separating clutch G¹. H' is a rest, and J' a stop for this clutch.
The stop is adjustably supported on the rod J. K¹ is a shunt solenoid whose cores
are secured to the U shaped frame L' which is pivotted at one end to the
standards M' M', and at the other end to the moveable cylinder L² of the dash pot.
N' retracting spring for the solenoids. O¹ is the lower or carbon feeding clutch
Bupported by the link R and spring R¹ and at one end is near the stop S on the
standard S. S is the rod which controls this stop and is attached to the armature F¹
so that the stop is moved by the motion of the armature. The rest H¹ is on the
link K. T is the brush composed of the side pieces T¹ T₁ which bear upon opposite
sides of the carbon rod P and which are adjustably forced together by the
Ecrew T. The whole is supported on the vertical pivot T. In Figure 11 the
brush is shown lying loosely upon the bottom of the frame.
I have not dwelt upon the circuits because they are familiar to persons skilled in
this art. When the current is applied the magnet E¹ draws up its armature thus
lifting the carbon rod and establishing the arc but as it does so the end of the

page_text: clutch G engages the stop J and the clutch is brought into a horizontal position
where it releases its rod but as the armature rises the rod S rises, the stop S is
turned on its pivot and the action of the spring R' dips the clutch ()" so as to make
it clutch and hold the rod for feeding. This clutch " moves up and down and
hence carries the upper carbon up and down responsive to changes in the magnetiza-
tion of the solenoids K' and thus the lamp feeds. The brush T being supported on
the vertical pivot, its two sides bear with equal pressure on the sides of the rod and
this pressure can be varied by adjusting the screw. The vertical pivot of the brush
is preferably attached to the frame which carries the lower clutch. In Figure 12
the cut out mechanism is diagrammatically shown. The contacts V* V³ are part of
the shunt circuit when the magnet E' is energized and its armature raised. The
rod V attached thereto rises and by swinging the arm V on its pivot V³ against
the spring V separates the contacts V V, and the current is shunted through the
lamp. As the lamp feeds, if the solenoid K¹ draws its armature or frame down too
far the rod V connected thereto will engage the end of the pawl V1 and lift it
from the notch V", thus permitting the part V" which carries the contact V' to
be released and the spring V to bring the two contacts together, and the lamp is
cut out. Thereupon the parts resume their normal position and the arm V' descends
far enough to permit the pawl to re-engage the notch. The brush rising and falling
with the feeding frame or clutch affords little obstruction to the movement of the
rod.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed; I declare that what I
claim is:
1. In an arc lamp, a current-carrying device consisting of fingers to engage the
carbon-rod on opposite sides, and means whereby they may be adjustably brought
together, and a vertical pivot on which such device is supported, so that the fingers
bear with equal pressure on opposite sides of the carbon-rod.
2. In an arc lamp, the combination of a single carbon at one electrode with two
or more distinct carbons rigidly secured to one and the same holder, so as to travel
together at the other electrode, and means for keeping the points of such distinct
carbons always substantially in contact with each other during the period of
burning.
3. An arc lamp provided with two separate and distinct gravity-clutches a main
circuit magnet or solenoid always in circuit and working solely upon one of such
clutches a stop to throw such clutch out of operation when the arc has been
established by its agency, and a derived-circuit magnet or solenoid to actuate the
other clutch and regulate the arc.
4. The combination of a movable globe-holder with two rods downwardly
depending from the lower carbon support and passing through the holder, and
securing devices whereby such holder is adjustably secured to the rods and a
movable rest at the lower ends of such rods to receive the globe-holder.
Dated this 23rd day of October 1893.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, Agent for Applicant.