Improvements relating to the Regulating of Electric Arc Lamps.
Year: 1892

page_text: Date of Application, 23rd May, 1892
Complete Specification Left, 23rd Jan., 1893-Accepted, 4th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to the Regulating of Electric Arc Lamps.
We ERNEST EUGENE BEAUVALET and LÉON CHARLES BEAUVALET, both
of 3 Rue Perrault Paris in the Republic of France, Plumbers and Gas Engineers
do hereby declare the nature of this invention to be as follows:-
This invention relates to electric arc lamps and the object of the invention is to
provide a simple and effective regulator for maintaining the carbons in proper
relation the one to the other.
The movement of the carbons is controlled by a balance lever or rocking beam
having connected respectively one to each end, two armatures or cores controlled
by two solenoids. Near this rocking beam is a pulley wheel preferably with
ratchet teeth around its periphery for engagement of a spring pawl governed by
the rocking beam and also with a plain surface on its periphery for the operation
of a brake-block connected to the rocking beam. This apparatus governs the
carbons by a cord or chain of any suitable kind attached at one end to the carrier
of the upper carbon, passing over the aforesaid pulley, down through one of the
side rods or otherwise under two pulleys on the carriage carrying the lower carbon.
thence up the other side rod or otherwise to be attached to the rocking beam. The
beam has an adjustable abutment for controlling the normal distance between the
points of the carbons, and is provided with a spring, for holding it in the desired
position when not acted on by either solenoid.
The current when the circuit is closed passes through the one solenoid to the
upper carbon, thence to the lower carbon (in contact) and thence from the lamp.
The solenoid attracts its armature and rocks the beam causing the upper carbon to
be raised by action of the pawl on the ratchet teeth of the pulley, and the
lower carbon to fall by the rocking of the beam. The arc thus enters into action
and the distance is controlled by the second solenoid, which is placed in shunt
between the terminals of the lamp, operating on the armature attached to the
opposite end of the beam.
The brake steadies the action of the pulley. It may be dispensed with if
desired.
Dated this 23rd day of May 1892.
HERBERT & Co.,
Agents to Applicants.
COMPLETE SPECIFICATION.
Improvements relating to the Regulating of Electric Arc Lamps.
We ERNEST EUGÈNE BEAUVALET and LÉON CHARLES BEAUVALET both
of 3 Rue Perrault, Paris in the Republic of France, Plumbers and Gas Engineers
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 arc lamps and the object of the invention is to
provide a simple and effective regulator for maintaining the carbons in proper
relation the one to the other.
The movement of the carbons is controlled by a balance lever or rocking beam
having connected respectively one to each end, two armatures or cores controlled
by two solenoids. Near this rocking beam is a pulley wheel preferably with
ratchet teeth around its periphery for engagement of a spring pawl governed by

page_text: the rocking beam and also with a plain surface on its periphery for the operation
of a brake-block connected to the rocking beam. This apparatus governs the
carbons by a cord or chain of any suitable kind attached at one end to the carrier
of the upper carbon passing over the aforesaid pulley, down through one of the
side rods or otherwise under two pulleys on the carriage carrying the lower carbon,
thence up the other side rod or otherwise to be attached to the rocking beam.
The beam has an adjustable abutment for controlling the normal distance
between the points of the carbons and is provided with a spring for holding it in
the desired position when not acted on by either solenoid.
The current when the circuit is closed, passes through the one solenoid to the
upper carbon thence to the lower carbon (in contact) and thence from the lamp.
The solenoid attracts its armature and rocks the beam causing the upper carbon to
be raised by action of the pawl on the ratchet teeth of the pulley, and the lower
carbon to fall by the rocking of the beam. The arc thus enters into action and the
distance is controlled by the second solenoid which is placed in shunt between the
terminal of the lamp operating on the armature attached to the opposite end of
the beam.
The brake steadies the action of the pulley. It may be disposed with, if
desired.
In the annexed drawings
Fig. is an elevation of the regulator, Fig. 2 is a diagrammatic view thereof
showing the currents. Fig. 3 is a side elevation, Fig. 4 a plan and Fig. 5 a front
elevation of one of the carbon holders. Fig. 6 is a detail view of a modified
construction. Fig. 7 a horizontal section of part thereof. Fig. 8 a vertical section
of part of regulator showing a method of regulating the armature of the solenoid.
SS are the two solenoids which operate on the respective armatures N N¹ one
at each end of the rocking lever L. V is a rotary pulley journalled in the frame
work. X is a cord or chain attached at one end to the carrier P of the upper
carbon passing over the small roller d, around the pulley V, thence down through
tube T under the pulleys G G on the lower carriage E of the lower carbon
holder P¹, and up through the tube T¹ to the lever L to which it is attached at the
point A. The rod B pivoted to the lever L commands the pawl C engaging with
the teeth of the wheel It on the pulley V while the brake block F presses against
the periphery of the latter. The set screw a in the lever L regulates the distance
of the carbons by abutting against the upper end plate of the solenoid S¹ and the
spring for holding the lever in its normal position may be attached to the
armature N' as shown in Fig. 1 or direct to the lever L.
The current arriving at the terminal traverses the solenoid S and passes to the
upper carbon, thence to the lower carbon and after that to the terminal .
The carbons being in contact the armature N is attracted, the pawl C engages with
the wheel R while the brake F presses on the pulley V holding it steady in its
movement, the cord X allows the lower carbon to drop and separates the carbons.
The intensity in the solenoid S decreasing with the separation of the carbons, that
in the solenoid S¹ placed in parallel in the circuit increases and the armature N' is
attracted, the pulley V is released and the arc assumes its normal distance.
The carbonholders hereinafter described may be used for carbons of any diameter
within the limits usually employed. In the bridge piece o o¹ is a central
rectangular frame p in which are guided two holders P P', one formed with a
salient angle the other with a reentrant angle. These holders are each moved by
screw nuts housed in sockets and engaging with screw threaded bolts on the
holders P P2.
The brake F may be dispensed with as its purpose is only to prevent oscillations
due to momentum of the parts.
;
The device of the pawl C and toothed ratchet wheel R may be replaced by the
following construction operating with the same result but with possibility of more
minute movement and consequently more exact and gradual compensating regulation.'
The pulley V over which the cord passes, or toothed wheel on which the chain, if a

page_text: chain is used instead of a cord, engages is made integral with a flanged periphery VI
Figs. 6 and 7 on which a frictional pawls engages. This pawl rests with its inner
end in a recess in the sleeve S' which is connected by rod B¹ to the lever L, the
spring tends to draw the pawls so that its recessed end grips the flange V₁. At
the moment of lighting the lamp the rod B' falls under the action of the lever L
and revolves the sleeve S' which moves the flanged wheel V₁ sufficiently and
correspondingly to the separation of the carbons. As the carbons enter into their
normal functional distance the equilibrium of the solenoids is established and the
rod B' takes its normal position causing the pawls to strike against the pin g and
so liberate the flange V₁ and allow the carbons to approach as the compensation
for their waste requires.
The compensation of the solenoid armatures may be provided for by screw-
threading the rods which attach them to the lever L as shown in Fig. 8. Nuts t
on these screw threaded rods n limit the downward movement of the armatures by
meeting the ends of the solenoids, while a similar effect may be produced by screws v
limiting the entrance of the armatures into the solenoids.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed we declare that what we
claim is ;-
1) The combination in au electric arc lamp of the pulley or equivalent V, the
lever L the solenoids S S¹ armatures N N' and means for controlling the pulley V
from the lever L for the purpose described.
2) The combination in an electric arc lamp of a lever L solenoids S S' and
armatures N N' arranged and supplied with current as described, a cord or
equivalent X traversing the course set forth and pulley or equivalent V rod B or B¹
and pawl in connection therewith for the purpose described.
3) The combination with the apparatus set forth in Claim 1 or 2 of the brake F
for the purpose set forth.
4) In the lamp described the carbon holders having the cheeks P P with
reentrant and salient angular faces respectively.
5) In the lamp described the method of regulating the armatures of the solenoids
substantially as described with reference to Figure 8.
Dated this 92-d doy of Tanu 1802
HERBERT. & Co.,
18, Buckingham Street, Strand, W.C., London, Agents to Applicants.