Improvements in or connected with Electric Arc Lamps.
Year: 1894

page_text: Date of Application, 22nd Aug., 1894
Complete Specification Left, 22nd May, 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with Electric Arc Lamps.
We, WILLIAM HOPKIN AKESTER, Electrical Engineer, and HENRY HERBERT
PRICE, Solicitor, both of Granville House, Arundel Street, Strand, in the County
of London, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in or connected with electric are lamps
and has for its object to provide a simple, inexpensive and efficient means whereby
the striking of the arc is regulated or controlled in a more effectual manner than
heretofore.
In carrying the invention into effect, the runners carrying the respective carbons
are suspended by chains as heretofore but these chains according to the present
invention are carried partly around a grooved pulley or flanged wheel in opposite
directions, the end being fixed thereto.
The flanged wheel is mounted with capability of revolving freely upon a stud or
axis carried at about the centre of the length of a short arm which latter at one
end is mounted upon a centre of motion in the slotted end of a post which is fixed
to some part of the frame of the apparatus, whilst at the other end of the short
arm is pivotally mounted a bell crank lever the short arm of which is provided
with a stud offset which when the long arm of the bell crank lever is raised engages
the rim of the flanged wheel locking therewith, and in its continued motion turning
the wheel and the short arm around the axis of the latter, a short distance.
The long arm of the bell crank lever is connected with the moveable core of a
solenoid or with the armature of another form of electro-magnet placed in the
electric circuit so that, when the current passes, the long arm of the bell crank lever
will be raised, the stud or projection from the short arm thereof will engage the
rim of the flanged wheel, and the whole device will be partly turned around the
axis of the arm carrying the wheel thus shortening the chain supporting one of
the electrodes and lengthening that supporting the other electrode and thereby
instantaneously striking the arc.
By these means, which are of a very simple and inexpensive character, the arc
will be struck with greater speed and precession than when employing the more
elaborate and costly devices at present in use for that purpose.
Dated this 22nd day of August 1894.
VAUGHAN & SON,
Agents for the Applicants.
Agents for the applicants.
COMPLETE SPECIFICATION.
Improvements in or connected with Electric Arc Lamps.
We, WILLIAM HOPKIN AKESTER, Electrical Engineer, and HENRY HERBERT
PRICE, Solicitor, both of Granville House, Arundel Street, Strand, in the County
of London, 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 :—
Our said invention relates to improvements in or connected with electric are
Improvements in or connected with Electric Arc Lamps.
We, WILLIAM HOPKIN AKESTER, Electrical Engineer, and HENRY HERBERT
PRICE, Solicitor, both of Granville House, Arundel Street, Strand, in the County
of London, 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 :—
Our said invention relates to improvements in or connected with electric are

page_text: the long arm of the bell crank lever d³ will be raised the stud or projection d' of the
bell crank lever d³ will engage the rim of the flanged wheel d. and the whole
device, that is to say, the flanged wheel d, the short arm d' and the bell crank
lever d will be turned a short distance around the axis d³ thus shortening the chain
supporting the upper or positive carbon and lengthening that supporting the lower
or negative carbon and thus separating the carbons and striking the arc.
It will be obvious that in lieu of the arrangement of solenoids hereinbefore shown
and described the bell crank lever d³ may be connected with the armature of
another form of electro-magnet placed in the electric circuit.
By the means hereinbefore described which are of a very simple and inexpensive
character, the arc may be struck with greater accuracy and precision than when
employing the well known more costly and elaborate devices for the same
purpose.
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 :-
In an electric arc lamp, the combination of a pair of vertically moveable carriera
or carbon holders, a short arm at one end mounted upon a centre of motion, a flanged
wheel mounted with capability of revolution upon a stud or axis carried by the short
arm towards the centre thereof, chains at one end respectively fixed with the
carriers and at the other end passed in opposite directions around the flanged wheel
and fixed thereto, a bell crank lever pivotally mounted upon the short arm and by
one arm directly or indirectly connected with the core or armature of a solenoid or
electro-magnet and upon the other arm provided with a stud or projection adapted
upon the movement of the core or armature to impinge upon the rim of the flanged
wheel and move the short arm upon its axis, substantially as herein shown and
described.
Dated this 22nd day May 1895.
VAUGHAN & SON,
Agents for the Applicants.