An Improved Apparatus for Regulating the Approach of the Carbons in Arc Lamps.
Year: 1891

page_text: Date of Application, 20th Mar., 1891
Complete Specification Left, 7th Oct., 1891-Accepted, 7th Nov., 1891
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Regulating the Approach of the Carbons
in Arc Lamps.
We, ALFRED WILLIAM MONEY, and HERBERT NASH, both of 100 Kensington
Park Road, in the County of Middlesex, Electricians, do hereby declare the nature
of this invention to be as follows:-
The invention relates to an improved apparatus for regulating the approach of the
carbons in arc lamps, which consists of two electro magnets, one in series with the
main circuit, the other a shunt across the are, they being placed in suitable positions
and having loose cores which are coupled together by means of rocking levers
pivotted at their centre, the said centre being capable of moving vertically within
certain limits.
From these electro magnets we impart motion to a second pair of rocking levers
connected 'together by cross bars, and which levers have for their pivot a spindle
which carries a brake wheel and pinion, which pinion gears in a rack rod, to the
bottom of which is attached the positive carbon.
By raising the electro magnet, the rocking levers are made to describe an arc;
at the same time the lower levers, having the spindle carrying the brake wheel, etc.,
for their pivot, are made to move horizontally by a small inclined plane fixed
to one of the lower levers and acting against a weighted adjustable roller, which
causes two small rubber cushions carried by the cross bars, to press against the
side of the said brake wheel and give it a slight turn, which separates the two
carbon points.
As the resistance of the arc increases, the two electro magnets, which are wound
differentially, control'the length of the arc.
1
1. 1001
COMPLETE SPECIFICATION.
An Improved Apparatus for Regulating the Approach of the Carbons
in Arc Lamps.
We, ALFRED WILLIAM MONEY and HERBERT NASH, both of 100 Kensington
Park Road, in the County of Middlesex, Electricians, 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, reference being had
to the accompanying drawings and to the figures and letters marked thereon:―
Figures 1 and 2 are two elevations drawn at right angles to each other of the
principal parts of an arc lamp provided with our improvements, some of the
parts being shown'in section.
Figure 3 is a plan drawn' on the line 1. 1. of Figure 1, and
Figure 4 is a plan of Figure 2 showing the plate B carrying the electro magnets
controlling the carbons.
The mam' frame of the lamp consists of plates A, B, C, connected together by
pillars D, E, the lower plate C being connected by pillars F to a plate (not shown)
carrying the lower carbon carrier and guide.

page_text: a a, b, are two electro magnets, one, a a', being in series with the main
circuit, the other, bb, a shunt across the arc. These electro magnets are placed
in suitable positions, and their cores a', b', are loose and are coupled together by
means of rocking levers e pivotted thereto at c¹ c².
The centre of these levers c is pivotted to a loose core d¹ of an electro-
magnet d, d, in series with the coil a of the electro maguet a, a', the current first
passing through the electro magnet a a', and then through the electro magnet d d..
N is the terminal for the negative pole, and P is the terminal for the positive pole;
the main conducting wires e, f, are connected with these terminals, and the terminal N
is insulated from the plate B, whilst the terminal P is in metallic contact with such
plate B, and consequently with the general frame of the lamp. The centre c³ of the
levers c is capable of movement vertically within certain limits, it being pivotted to
the loose core, the upper end of which is capable of rising to the underside of
the top end of the bobbin carrying the coil d, whilst its lower end can descend
as far as the forked guide g.
From the electro-magnets a a¹, 1, we impart motion, through the levers c
and connecting links h, to a second pair of rocking levers i, i connected together
by cross bars, and which levers have for their pivot a spindle j, which carries
a break wheel k and pinion l, which pinion gears into a rack rod m, which is
vertically guided and has attached to its lower end, by means of the clamp m', the
positive carbon n.
As the core a¹ of the electro-magnet a a' rises, the rocking levers c are made to
describe an arc on the pivot c', carrying with them the core of the electro
magnet dd; at the same time, the lower levers ii are, by the connection, made
to describe an arc, and they are caused to move horizontally on their pivot j by a
small inclined plane 2 fixed to one of said levers i and acting against a weighted
roller 0, which causes the two small rubber cushions carried by the cross bars i¹ to
press against the side of the said break wheel k and give it a slight turn, which, by
the pinion and rack m, separates the two carbon points.
The break wheel k has friction grooves on its face to ensure the proper action of
the cushions thereon; the roller o is mounted on a spindle o' carried by a pivotted
cross bar o², to which the weight is connected, and the motion of such weight o³,
and consequently of the roller o, is regulated by means of the adjustable screw
pin of.
As the resistance of the arc increases, which is caused by the consumption of the
carbons, less current flows through the electro-maguet a a¹ and more through bb³,
consequently the rocking levers c are made to rock on the centre c³, which is now
a fixed centre, being held in that position by the electro-magnet dd; at the same
time the lower levers i, which are connected to the said rocking levers c by the
link connection h, describe an arc in the reverse direction to their former motion,
thereby allowing the weight o³ to come to rest on the screw pin of and, by the
action of the spring j', releasing at the same time the rubber cushions from
the side of the break wheel k, and allowing the carbon rack rod m to descend by
gravity until the resistance of the arc is at its normal; then the said core a¹ of the
electro-magnet a a' is slightly drawn up in the coil a and the rubber cushions,³
again caused to press on the side of the brake wheel k, thus holding the rack rod m
in this position until the carbons are further consumed.
One end of the coil of the electro-magnet a a' is connected with the insulated
rods F, whilst the other end is connected with the beginning of the coil d, and the
current, after going through the two coils a, d, in series, flows to the terminal N,
and one end of the coil of the electro-magnet is connected with the plate B,
and the other is connected to the terminal N.
p is a short circuiting arrangement, which acts to complete the line circuit in
the event of the circuit through the lamp being broken from any cause. q is
an air dash pot employed to regulate the action of the loose core a¹.
The lower carbon (not shown) is mounted in a holder, which is guided in any

page_text: usual or convenient manner, and is attached to one end of the chain m³ which
passes over the pulley m³, and the other end of which is attached to the carbon rack
rod m, as shown.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The arrangement and combination of parts for regulating the approach or
distance apart of the carbons in arc lamps, substantially as herein shown and
described.
2. In arc lamps, the combination and arrangement of electro-magnets a a¹, b b',
dd', rocking levers c pivotted to the loose cores a', b', d', rocking levers i mounted
with capability of turning and sliding on the axis j, and connected to, and operated
by, the levers c, an inclined plane carried by the levers i, a regulated weighted
roller o acting against such inclined plane, and friction pads carried by the levers i
and acting against the side of the brake wheel k, substantially as herein shown
and described and for the purpose stated.
Doted this 7th day of October 1901
ALFRED WM. MONEY.
HERBERT NASH.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.