An Improved Aro Regulator for Electric Lamps.
Year: 1895

page_text: Date of Application, 30th July, 1895-Accepted, 28th Sept., 1895
COMPLETE SPECIFICATION.
An Improved Aro Regulator for Electric Lamps.
I, SINFOROSO PRIETO, of 126 Rambla de Cataluña, Barcelona, in the Kingdom
of Spain, Manufacturer, 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 :-
The electric are regulator which forms the subject of this invention is charac-
terised by the form and arrangement of the carbon holders, the mode of their
suspension, the combination of the electro-magnet with the suspending frame and
with the brake serving to limit the movement of the carbon holders, the con-
struction of the armature of the electro-magnet arranged so as to form an inclined
plane and finally by the absence of springs which are apt to interfere with the
correct operation of the mechanism.
This improved apparatus is represented in the annexed drawings in which,
Fig. 1 is a vertical section of the same. Fig. 2 represents a side view thereof.
Fig. 3 a horizontal section on the line of Fig. 1. Fig. 4 a section on the
line y y and Fig. 5 a section on line vv of Fig. 1.
The upper carbon holder consists of a frame formed by two vertical bars D D the
extremities of which are united by cross-bars D¹ D', the lower one having at its
extremities grooves serving as guides for its movement along the lateral bars E.
These bars E are fastened on to a base plate E¹ while their upper ends are
connected to a cross plate E2. The upper plate D' is insulated by contact pieces
of ebonite or equivalent material, and it is at each extremity provided with
forks D to slide along the bars E whereas to its middle part is attached a
socket D¹ to hold the upper carbon.
The lower plate D, on the other hand is provided with a grooved pulley D³.
The lower carbon-holder consists of a central bar F which has at its lower end
a plate F carrying a grooved pulley F'.
F presents at its extremnities grooves serving as guides for movement along
the fixed vertical bars G. The lower carbon-holder is connected to the plate F¹ by
means of an appropriate insulating piece.
Above on the vertical bars E is a fixed plate G' provided at its middle with a
hole so as to admit of passage of the lower carbon-holder F. Said plate G'supports
the electro magnet A the position of which can be regulated at will by means of
the adjusting screws A'. The coil of this electro-magnet is differential or connected
in parallel. The armature A² as well as the core of the electro-magnet are cut in
a bevelled form for the purpose of increasing the effect of the magnet.
The armature A' is arranged at the extremity of the lever B which turns on a
bracket on one of the bars E. The lever B is constructed of two arms so as to
give better support to the armature A³, but it is evident that only one arm is
required to produce the same effect.
Each lever B carries a bar C the opposite extremity of which is connected to a
second lever C. These two levers Care adapted to turn about gudgeons mounted
on the support I and they are united by means of the bar C.
The bars C are formed of two pieces screwed together so as to permit of adjusting
their length and to also regulate the course of the levers B and C', regulating
consequently at the same time, the movement of the armature and the carbon-
olders.
The support I carries a shaft J ou which are keyed two brake wheels J' each

page_text: Said
of the latter corresponding with one of the above mentioned levers B.
wheels form one integral part and present in the middle between them a groove J¹
to receive a string cord, or chain K. The shaft J is of steel and is mounted on
bearing blocks J³ also of steel.
Between the bar C2 of the levers C' and the levers B runs the string or chain K
which passes around the pulley F2 of the lower carbon-holder over the pulley J' of
the shaft J, and the pulley D³ of the cross plate D¹ of the upper carbon-holder.
The end of the string K is fastened on to a bar B' which connects the two
levers B. The said string K thus maintains the lower as well as the upper carbon-
holder.
The upper carbon-holder D is of considerably larger weight than the lower, so
that it may act as a motor. In order to regulate its weight and consequently its
effect, the lower cross plate D₁ is provided with two cups D₁ which may contain
lead with the view of increasing the weight.
When the lamp is in the state of rest the carbons remain in contact in
consequence of the superior weight of the upper carbon bolder, which tends to
descend and consequently to cause the lower carbon-holder to rise by means of the
string or chain K.
The armature A remains also in a lowered position, as it is not attracted by the
electro-magnet.
When the electric current is established the electro-magnet attracts the armature A³
which latter raises the levers B forcing them against the wheels J. This move-
ment raises the upper carbon-holder and at the same time lowers the lower one
giving rise to the formation of the arc.
The levers B as long as they press against the wheels J' prevent turning
movement of the latter, whereby consequently the carbon holders remain
immovable. When however the intensity of the current decreases, the
armature A and the levers B tend to descend leaving the wheels J', whereupon
the weight of the upper carbon bolder acts so as to approach the carbons to each
other to the limit which is allowed by the movement of the armature A².
On the annexed drawings I have represented the regulating mechanism below
the voltaic arc, but it is manifest that it could be arranged above according as the
apparatus is destined to be used as an ordinary regulator with inversed poles, with
automatic reflectors or as a hand apparatus.
Regulation is effected by raising or lowering the electro-magnet by means of the
adjusting screws A'; by limiting the course of the levers B by means of the
adjusting screws I or finally by varying the length of the bars C.
The box or outer casing which is to protect the regulating mechanism is fixed
on to the lower or bottom plate E' by means of a screw passing through the
hole E³.
When the regulator is to be employed as a hand regulator the exterior casing is
removed and by means of a string fastened to a ring (not represented in the
drawing) which is in this instance attached to the cross-plate F¹, said string
passing through the opening E³, the arc may be regulated by hand as desired.
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 :-
In means for regulating the arc of an electric lamp:
:-
1. The upper carbon holder formed of two parallel bars and united at their
extremities by means of arms, the upper one of which containing the carbon being
insulated, these arms being provided with forks or grooves to allow of their sliding
smoothly along two exterior fixed bars which serve as guides to the movements of
the carbon holder, the lower arm supporting two cups which may contain lead so
as to regulate the weight of the carbon-holder.
2. The lower carbon-holder forined by a central bar holding the carbon said bar
passing through an insulated cushion arranged or the centre of a fixed plate and

page_text: having at its extremity a cross-plate adapted to slide on two exterior bars serving
as guides during the movements of the carbon holder.
3. The arrangement of the cores of the electro-magnets and their armature in ..
form of an inclined plane.
4. The method of suspending the electro-magnet with the aid of adjusting screws
so as to be able to regulate its position.
5. The combination of the levers B supporting the armature A' with bars C
united to the levers C and with the brake wheels J' to which the levers B serve
as brakes, a chain or cord K the ends of which are attached respectively to the
levers C and B, said chain or cord maintaining the upper and lower carbon-holders
and passing over the grooved pulley of the wheels J so that the weight of the
upper carbon-holder may cause the whole system to move, this movement being
stopped or limited only by the action of the levers B on the wheels J' proportional
to the intensity of the current.
Dated this 30th day of July 1895.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to Applicant.