IMPROVEMENTS IN ELECTRIC ARC REGULATORS
Year: 1885

page_text: I JOHN GRICE STATTER of 37 High Street, Chelmsford in the county of Essex,
Electrical Engineer do hereby declare the nature of my said invention for
"IMPROVEMENTS IN ELECTRIC ARC REGULATORS" to be as follows:-
My invention relates to that class of mechanism known as electric arc regulators,
the object of the invention being chiefly to insure the separation and gradual feeding
of the carbons in arc regulators.
In carrying out my invention I actuate the improved mechanism by means of a
solenoid or by an electro inagnet, either series shunt or compound wound.
The power of the solenoid or electro magnet as the case may be, is applied to a
link or to two or more links braced together.
This arrangement hereinafter called "the frame" works about a fixed spindle
and bears upon and controls the position of a piece hereinafter called a saddle
working in guides, or a guide such as a tube.
The attachment to the solenoid or electro magnet may be guided by a suitable
parallel motion such as an arc struck from the same centre as the link or by an
approximately parallel motion of suitable nature.
Brakes (their number being the same as that of the brake wheels) work in
bearings attached to the saddle; spindles for the brake wheels are also attached to
the saddle and to each brake wheel a pinion is rigidly attached.
This pinion gears with a rack rod.
The brakes are pressed upon the brake wheels by a connection of some elasticity
such as a spiral spring attached to the frame or to the saddle. I usually make the
regulator with two rack rods each with its respective pinion, brake wheel, and
brake but I do not confine myself to use any fixed number of these parts. The
negative rod carrying the holder or holders for the negative carbons can be fixed
or can work in guides and be connected to the frame or to the saddle.
This connection is however so made that the motion of the negative rod is not
in the same direction as that of the frame and saddle.
Each link of the frame has a projection at right angles or nearly at right angles
to its length forming a bell crank about its bearing and a stud or pin is put into
this projection. To this stud or pin the flexible attachment to the brake is fixed
and as the saddle is lifted up by the thrust of the frame upon it the bell crank

page_text: pulls the break upon the wheel by means of its pin and flexible attachment. As.
the link descends the crank moves round, slackens this attachment and raises the
brake, allowing the wheel to revolve and the rack rod to descend:
A slotted link
is sometimes connected from the link of the frame to the brake in such a manner
that when the link descends to a certain point the stud or pin comes to the end of
the slot and ensures the removal of the brake from the wheel.
When the attachment is from the brake to the saddle the brake is pressed upon
the wheel, except at that position in which the stud of the bell crank pushes it
away, either by a slotted link or other suitable device.
The frame carries a contact piece which in its lowest position it allows to fall
upon a second fixed contact piece. These pieces may be so electrically connected
up that when in contact the feeding current passes as a shunt to the arc.
Dated the 6th day of Norah 1005

page_text: I JOHN GRICE STATTER, of Middleton Road Works, Dalston, in the county of
Middlesex Electrical Engineer 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 :-
My invention relates to that class of mechanism known as electric arc regulators
or are lamps the object of the invention being chiefly to insure the separation and
gradual feeding of the carbons in are regulators or are lamps.
In carrying out my invention I actuate the improved mechanism by means of a
solenoid or by an electro-magnet, either series shunt or compound wound.
The power of the solenoid or electro-magnet as the case may be, is applied to a
link or to two or more links braced together.
This arrangement hereinafter called "the frame" works around a fixed spindle
and bears upon and controls the position of a piece which I call a saddle working
on guides, or a guide such as a tube.
The attachment to the core of the solenoid or electro-magnet may be guided by
a suitable parallel motion such as an arc struck from the same centre as the link
or by an approximately parallel motion of suitable nature.
Brakes (their number being the same as that of the brake wheels) work in
bearings attached to the saddle; spindles for the brake wheels are also attached to
the saddle, and to each brake wheel a pinion is rigidly attached.
These pinions gear with rack rods.
The brakes are pressed upon the brake wheels by connections of some elasticity
such as spiral springs attached to the frame or to the saddle.
Each link of the frame has a projection set at an angle of about sixty degrees to
the length of the link and forming a bell crank about its bearing and a stud or
pin is put into this projection. To this stud or pin the flexible attachment to the
brake is fixed and as the saddle is lifted up by the thrust of the frame upon it the
bell crank pulls the brake upon the wheel by means of its pin and flexible
attachment. As the frame descends the crank moves round, slackens this attach-
ment and raises the brake, allowing the wheel to revolve and the rack rod to
descend. A slotted link is sometimes connected from the link of the frame to the
brake in such a manner that when the link descends to a certain point the stud or
pin comes to the end of the slot and ensures the removal of the brake from the
wheel.
When the attachment is from the brake to the saddle the brake is pressed upon
the wheel, except at that position in which the stud of the bell crank pushes it
away either by a slotted link or other suitable device.
The frame carries a contact piece which in its lowest position it allows to fall
upon a second fixed contact piece.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figures I and II
represent a side and a front elevation respectively of an electric arc regulator
constructed according to my invention the brake being connected with the frame;

page_text: figure III, is an elevation of a complete lamp drawn to a smaller scale; figure IV, is
a diagramatic view shewing the brake connection attached to the saddle; figure V,
is a similar view shewing a modification of the brake connection shewn in
figure IV. Similar letters in all the figures represent similar or corresponding
parts.
Referring to figures I and II; A, is the frame which works around the spindle B,
fixed in projections on the fixed framework of the lamp. C, is the saddle which
works on the guide tube D and the guide piece E, and rests upon the frame A upon
two knife edges (not shewn in the drawing). F, is the attachment to the core of
the solenoid G, which in the regulator shewn in figures I and II is a compound
wound solenoid.
The attachment is guided by a curved guide H shaped to an arc struck from the
centre of the spindle B of the frame A.
I, in figure I represents one of the brakes (their number being the same as that
of the brake wheels) and K. and L, are the bearings of the same which are attached
to the saddle C; O, and P are the brake wheels and M and N are the spindles of
the same which spindles are also attached to the saddle C; and to each brake wheel
a pinion is rigidly attached; and R, are the pinions and Q¹ and R¹ are the rack
rods gearing with the same; S and T are the spiral springs by which the brakes
are pressed upon the brake wheels O and P, the said spiral springs being attached
to the frane A.
A1, A¹, are the projections one on each link of the frame A and set at an angle
of about sixty degrees to the length of the link as shewn in figure I and forming
a bell crank about its bearing; U, U, are the studs in the projections A', A'. 'To
the studs U, the springs S and T are fixed and as the saddle C is raised up by the
thrust of the frame A upon it the projections or bell cranks A', pull the breaks I
upon the wheels O and P by means of the springs S and T fixed to the studs U.
As the frame descends the cranks A¹ move round and slacken the springs S and T;
V, V are the slotted links (shewn inside the spring S) and connected from the
frame to the brakes in such a manner that when one of the links descends to a
certain point its stud U comes to the end of the slot Y and ensures the removal of
the brake I from the wheel.
The wheel O tends to revolve by the gravitation of the rack rod Q which gears
with its pinion Q-the upper carbon holder with its carbon is attached to this
rack rod Thus when the spring S, is sufficiently slackened the brake I is wholly
or partially removed and the wheel O will revolve and a feed will take place.
The controlling power represented in figures I and II by the solenoid G is shewn
adapted to raise all the mechanism attached to the saddle C. In this manner
therefore it can raise the upper carbon by raising the saddle whilst the brake is
pressed upon the wheel-It can therefore strike the arc or lengthen the arc at any
moment.
The links are so arranged in relation to the brakes that one brake can be set to
operate upon its wheel in advance of the other brake; by this means only one of
the rack rods with its carbon is operated to feed the carbon at one time; W, is the
contact piece on the frame A, which contact piece in its lowest position is allowed
to fall upon the fixed contact piece X. These pieces may be so electrically
connected up that when in contact the feeding current passes as a shunt to the
arc. Z is a stop for preventing the rack rods from descending after the carbons
have been consumed.
The radius of each of the studs U, is preferably the same as that of the knife
edges by means of which the saddle C is raised. The weight of the saddle, brake
wheels, rack rods, brakes, and upper carbons is carried by the frame A, upon these
knife edges.
The frame A, is actuated by the attachment F, to the core of the solenoid G which
is supported by a spring.
The weight of the core of the solenoid G and also the weight on the frame A, is
ultimately partially carried by this spring. The nosition of the fain A
لام

page_text: times when the regulator is working is determined by the varying power of the
solenoid G (or by the varying power of the electro magnets if such be used instead
of the solenoid) and by my invention a very slight change in the power of the
solenoid (or electro magnet) is required to produce a sufficient movement of the
frame A to alter the length of the arc to that which should be maintained at
the moment in question.
By
I therefore as will be seen carry the weight of the mechanism always on the
knife edges and do not transfer it from one point to another on the frame.
this arrangement the load carried by the solenoid (or electro magnet) is approxi-
mately the same for all positions of the frame and the solenoid is able to vary the
position of its core and therefore the length of the arc readily as this variation
becomes necessary by the consumption of the carbons or other causes.
The amount of variation in the tension of the spring S, which is the chief cause
of the small variation in the load carried by the solenoid and which determines
whether the carbons shall be fed or not is made as small as possible by having a
relatively large brake surface as shewn thereby gripping a considerable portion of
the periphery of the brake wheel.
I usually make the regulator with two rack rods each with its respective pinion,
brake wheel and brake but I do not confine myself to use any fixed number of
these parts. The negative rod carrying the holder or holders for the negative
carbons can be fixed or can work in guides and be connected to the frame or to the
saddle.
This connection is however so made that the motion of the negative rod is not
in the same direction as that of the frame and saddle.
Figure IV shews the spring S, attached to the saddle C. In this case the
brakes I are held upon the wheels O and P, until the frame A descends sufficiently
to bring the studs U, of the bell cranks A¹, in contact with the bars I' which are
rigidly attached to the brakes I the pressure of a stud U upon its bar I', will then
remove the brake and allow the wheel to revolve and a feed to take place the other
brake being still on its wheel.
In figure V each spring S, is shewn also attached to the saddle C but each brake
is in this case removed by the stud U of its bell crank A, bearing upon the end of
the slot Y in the link VI when the frame A descends sufficiently.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
The combination of parts forming the improved electric are regulators operating
substantially as and for the purposes hereinbefore described and represented in the
various figures of the accompanying drawing.