improvements in and connected with Are Lamps.
Year: 1895

page_text: Date of Application, 24th Jan., 1895
Complete Specification Left, 24th Oct., 1895-Accepted, 23rd Nov., 1895
improvements in and connected with Are Lamps.
We, HERMANN NIEWERTH, Electrician, and REGINA NIEWERTH, no occupa-
tion, both of Spener Strasse, Berlin, Prussia, do hereby declare the nature of this
invention to be as follows:-
This invention relates to the class of arc lamps with shunt circuit. The
mechanism is mounted on a plate. also the holder or carrier for the carbon pencil.
On the side opposite to the holder or carrier, and on the plate, is provided a
bracket, on the arbour of which is mounted a two-armed oscillating bar, this oscil-
lating bar swings on the arbour of the bracket. Above the oscillating bar, a
solenoid, or magnetic coil is mounted on the plate in such a manner that the iron
core firmly connected with the oscillating bar, freely moves up and down in the
solenoid when the bar oscillates. Between the oscillating bars a ratchet arrange-
ment is provided. On a lower arbour of the ratchet arrangement, a second carrier
or holder is mounted. This is loose on the arbour, and with the pawl, bears
against a wheel firmly connected with the ratchet arrangement. The weight of
the carrier is such that it causes rotation of the ratchet arrangement when the
latter is disengaged.
The ratchet arrangement is disengaged as follows:-Above the upper arbour of
the ratchet arrangement is placed the escapement. The tongue or tooth of this
escapement is stopped by a pendant point mounted on a second bar. This bar is.
capable of movement in the sides of the ratchet arrangement and bears on
supports; these being secured on the plate. When the ratchet arrangement is at
rest, the pawl prevents motion of a tooth attached to the escapement.
When the
two-armed bar oscillates, the second bar cannot follow the motion, being held by
pendant rods, and so releases the second bar and the tooth, and admits the movement
of the ratchet arrangement. Above the movable solenoid, there is a fixed and
adjustable solenoid, which serves to increase the magnetic power of the solenoid
proper. The way in which a shunt current lamp works is known, and nothing
need here be said on the manner in which the circuits are arranged. As soon as
the current is allowed to pass, the solenoid will raise the core, thereby raising one
end of the two-armed bar, which short-circuits the carbons as will be readily.
understood. The arc is now produced and the core is in the middle position in
the solenoid. Now, as the pencil in the carrier burns away, the core enters
further into the solenoid and thereby maintains the carbons at the proper distance.
When the core has passed into the solenoid beyond a predetermined distance, then.
the oscillating bar descending on the side where the ratchet arrangement is, the.
ratchet arrangement is set free, the carbon swings after, and the magnet returns to
the middle position.
F.
If the lamp is to be worked by the main current, a core is mounted on the other
side of the solenoid, so as to be drawn in, as the connection between the core and
the oscillating bar is effected by a non-electric body. Regulation is effected in
the manner above set forth.
This invention embodies :-
(1) An electric arc lamp in which the magnetic force by which the same is
regulated acts on one side of a bar oscillating on a spindle or an arbour; the
actual regulating device being at the other side of the said bar and swings freely
with the bar when the latter is actuated by the magnetic force.

page_text: (2) An electric are lamp in which the swinging carbon carrier actuates the
regulating mechanism by means of a ratchet arrangement, the regulating
mechanism itself may be arranged to oscillate freely, and connected with a lever
arrangement controlled by a magnet on the side opposite to the regulating
mechanism, 1
T
Improvements in, and connected with Arc, Lamps, yr
We,; HERMANN, NIEWERTH, Electrician, and, REGINA, NIEWERTH,, no occupa-
tion,, both of, Spener, Strasse,, Berlin, Prussia,, 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 electric: are; lamps and has special reference to
mechanism or apparatus: for controlling and regulating, the feed of the carbons;
such devices as hereafter described; chiefly, consisting of an oscillating bar or bars
pivotted, at about the centre to a base: plate,, and, actuated on, the one side by the
varying electric currents. usually in asshunt: circuit, and having, located on the other
side controlling mechanism for the movable carbon..
Our invention will readily be understood by reference to the accompanying
drawings on which;
Figure 1. is a sectional, side, elevation of amare, lamp constructed, according to
our invention;
Figure 2 is a side, elevation off controlling mechanism, and, Figure 3 is. an, end
elevation, both the latter, figures, shewing, the said mechanism detached, and drawn,
to a larger scale.
:
A, is the base plate of the lamp,. on the upper side of which is, mounted, a
bracket B, upon which is pivotted say a pair of oscillating: bars C,,C. Above the
ends..C; of the rocking bars is: a solenoid or magneties coil. D. carried upon
supports.D. from the base plates A; and the core E of this, coill D. is pivotted. att
one end to the ends: Ci of the rocking bars, and is free to have, vertical motion, in,
the solenoid when the barst C, Croak upon the pivote Bl.. At the ends.C.of.the.
rocking bars is located, the controlling mechanism. This mechanismiis composed of
a framework Fiattached to.said: ends C off the bars:.. The framework, K, carries.
an arbor G, having loosely.mounted thereoustle-movable carbon holder H, carrying
the carbon. H; and, the holder H is provided with a spring: pawl, taking into,
the teeth of the ratchet; wheel...J',, fixed, on arbour G.. The arbour, G, carries a
toothed,wheel: J2 which,byua train of wheels gears into a pinion J on,an-arbour J,
carrying a. ratchet, wheel! JP controlled by a palletsK., By, this arrangement, the:
weight of the carbon carrier H,. actuates the train of wheels. when the latter are,
free and allows the carbon H¹ to approach the carbon L, the latter being carried.
in a fixed holden Lattached to the under side of the base plate A..
The action of the pallet: K induced by, the weight of the carbon holder. H, is,
restrained or stopped, by a tooth. K on the pallet K coming in contact, with a
dependant point M, on a cross bar M', which is capable of being moved in.vertical.
slots in the frame F. This cross bar M' is supported. at either, end, by a pair of
pivotted: rods M2 mounted at their lower ends on a bracket, M3 carried on the base
plate A By this arrangement, when, the ends,C) of the rocking bars are raised,.
the dependant point M. acts.against the: tooth K, and prevents motion of the train
of wheels, and consequently of the carbony carrier H, while; ; downward. motion of
the ends C¹ releases the escapement and allows the weight of the carbon holder H
ve

page_text: to descend regularly towards the carbon L by gravity. Above the movable eore E
of the solenoid there is a fixed core E¹, which serves to increase the magnetic power.
The action of a shunt current in an arc lamp and the arrangement of the con-
nections is well known and does not specially refer to this invention, but it will be
understood that, upon the current passing, the core E will be lifted and the carbons
will be short circuited; the arc being produced and the core E caused to assume
the middle position of its travel. As the pencil H¹, burns away, the core E enters
further into the solenoid and thereby maintains the carbons at proper distance, and
when the core E has travelled a certain distance the ends C of the rocking bars
descend to a position, when the tooth K¹ is set free, the carbon H¹ descends and
the core E reassumes its middle position. If the lamp is to be worked by the
main current, the movable core E is located on the opposite end of the solenoid,
so as to reverse the action and be drawn downwards and inwards; in such case,
the connection between the core and rocking bars being effected by a non magnetic
material; the regulation in such case is as before described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :
1. An electric arc lamp wherein the magnetic force or solenoid acts upon one
end of a rocking bar to give motion thereto, a regulating and controlling mechanism
being carried by the other end of the said bar; and acting all substantially as and
for the purposes hereinbefore described.
2. In an electric arc lamp, wherein a swinging carbon carrier actuates regulating
gear by means of a ratchet mechanism; arranging such regulating or controlling
mechanism to be carried by rocking levers, and to act in conjunction with a stop,
the rocking levers being actuated by a magnet or solenoid, all arranged and acting
substantially as set forth.
3. The general arrangement and construction of regulating and controlling
mechanism of electric arc lamps, substantially as described and illustrated with
reference to Figs. 1, 2, and 3, of the accompanying drawings.
Dated this 24th day of October 1895.
FREDERIC PRINCE,
37 Cursitor Street, London, E.C., Agent for Applicants.