Year: 1898

page_text: Date of Application, 1st Nov., 1898
Complete Specification Left, 1st Aug., 1899-Accepted, 2nd Sept., 1899
I, WILLIAM GEORGE HEYS, of 70, Market Street, Manchester, in the County
of Lancaster, Chartered Patent Agent, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to the arc striking and feeding mechanism for the upper
carbon of an electric arc lamp. The object of the invention is, primarily, to
produce a simple and cheap lamp, and one which will regulate accurately.
The improved mechanism consists of a form of clutch which will be described
in detail with reference to the accompanying drawings, in which,
Figure 1 represents a vertical central section through the top and bottom
of the casing containing the are regulating mechanism, showing the improved
clutch partially in section and in the normal operative position.
Figure 2 shews a portion of the frame and the clutch in section, the latter
being shewn at the feeding position.
Figure 3 is a plan of the clutch.
Referring to the drawings by letter, A, A respectively represent the top and
bottom plates of the casing of an arc lamp. They are usually circular dises
perforated at the centre for the passage of the carbon rod B. My improved
clutch is under the control of a single solenoid C, whose movable core or
armature e, projects through the lower end of the spool. The clutch consists,
in general, of the lever e, the ring f, and the link g.
The lever e, is pivoted freely to the lower end of the core c, and at its opposite.
end is provided with an opening through which the carbon rod B passes. The
extreme outer end of the lever has an upwardly turned lip e', while adjacent
to the opening but on the side opposite the lip, a cross bar e, is fixed, the
function of which will be described later on. The lever carries a vertically
adjustable post e³, located at a point between its pivoted end and the bar e². In
the upper end of this post is pivoted one end ², of a link. g, whose other end is
pivoted at the point g in a radial opening of the ring f. This ring is located
immediately above the lever c, and the carbon rod passes through it as well as
through the lever. The end of the link, which projects into the ring, is eccentric
and is adapted to bear against the carbon rod. The shape of this eccentricity
is such that the nearer the ring and the link approach the same plane, the
tighter the grip will be on the rod. A stop i, against which the lever e lowers,
formed on the frame A, around the opening for the carbon rod in the form of
an annular flange, one side of which, adjacent to the magnet, is bevelled down-
ward as shewn.
The operation is as follows:
When the lamp is not burning, the parts of the clutch are in the position shown

page_text: in Figure 2. The moment the current is turned on the core c is lifted; this
lifts one end of the lever e, while the other remains on the stop . As the lifted
end raises, the link g, is brought more nearly into line with the ring f, until
the rod is clamped, between one side of the ring and the eccentric toe of the link,
whereupon the carbon rod travels upward with the core c, to strike the arc.
When the lever e, has been lifted to a substantially horizontal position, it has,
at the same time, been slightly drawn towards the core c, so that the outer edge
of the opening in the lever also grips the carbon rod and all parts travel up
rigidly together to the full pick up" of the lamp, which is limited by the
adjustable screw j. When the magnet is weakened by the elongation of the arc,
all parts travel rigidly downward until the other end of the lever e, strikes the
horizontal portion of the stop i, whereupon the lever releases its grip on the
rod and continues to swing downward, turning upon the level surface of the stop
as a fulcrum, the bevelled side permitting the lever to assume the position shown
in Figure 2. Just before this final position is reached, one side of the ring f,
containing the pivot g', is retarded by the cross bar e. The other end of the link g
continues to niove downwards with lever e, to release the excentric toe from
the carbon rod, while the lip e¹, simultaneously rises against the outer side of
ring f, and lifts it to a level position, to entirely free the rod and allow it to
feed downwards. It is particularly desirable to bring the ring f to this level
and free position when the clutch is lowered, because it is in this position that
the lamp is trimmed, and it is necessary to be able to move the carbon rod
freely up and down through the clutch without interference therewith.
The clutch I have described, furnishes a very sensitive device and one which
is not liable to release its grip upon the carbon rod when the lamp is jarred
or otherwise disturbed, since the double clutch furnishes an ample grip.
011
L
D 1000
W. E. HEYS & SON,
Agents for the Applicants.
Improvements in Arc Lamps.
I, WILLIAM GEORGE HEYS, of 70, Market Street, Manchester, in the County
of Lancaster, Chartered Patent Agent, do hereby declare the nature of this inven
tion, 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 the arc striking and feeding mechanism for the upper
carbon, of an electric arc lamp. The object of the invention is, primarily, to
produce a simple and cheap lamp, and one which will regulate accurately.
The improved mechanism consists of a form of clutch which will be described
in detail with reference to the drawings filed with my Provisional Specification,.
in which :
Figure represents a vertical central section through the top and bottom of
the casing containing the are regulating mechanism, shewing the improved clutch
partially in section and in the normal operative position.
Figure 2, shews a portion of the frame and the clutch in section, the latter
being shewn at the feeding position.
· Figure 3 shews a plan of the clutch.
Referring to the drawings by letter, A A¹ respectively represent the top and
bottom plates of the casing of an arc lamp. They are usually circular discs
perforated at the centre for the passage of the carbon rod B. My improved

page_text: clutch is under the control of a single solenoid C, whose movable core or arma-
ture c, projects through the lower end of the spool. The clutch consists, in
general, of the lever c, the ring f, and the link g. The lever e, is pivoted freely
to the lower end of the core c, and at its opposite end is provided with an opening
through which the carbon rod B, passes. The extreme outer end of the lever
has an upwardly turned lip e¹, while adjacent to the opening, but on the side
opposite to the lip, a cross bar e2, is fixed, the function of which will be described
later on.
The lever carries a vertically adjustable post e, located at a point
between its pivoted end and the bar e. In the upper end of this post is pivoted
one end 2, of a link g, whose other end is pivoted at the point g', in a radial
opening of the ring f. This ring is located immediately above the lever e, and
the carbon rod passes through it as well as through the lever. The end of the
link, which projects into the ring, is excentric and is adapted to bear against
the carbon rod. The shape of this excentricity is such that the nearer the ring
and the link approach the same plane, the tighter will be the grip upon the rod.
A stop i, against which the lever e lowers, is formed on the frame A, around the
opening for the carbon rod in the form of an annual flange, the side of which
adjacent to the magnet, is bevelled downward as shewn.
The operation is as follows:-
33
When the lamp is not burning, the parts of the clutch are in the positions
shewn by Figure 2. The moment the current is turned on, the core is lifted
and lifts one end of the lever e, the other end of the lever remaining on the stop i.
As the lifted end rises, the link g is brought more nearly into line with the
ring f, until the rod is clamped between one side of the ring and the excentric
toe of the link, whereupon the carbon rod travels upward with the core c, to
strike the arc. When the levere has been lifted to a substantially horizontal
position, it has, at the same time, been slightly drawn towards the core c, so
that the outer edge of the opening in the lever also grips the carbon rod and all
parts travel up rigidly together to the full "pick-up of the lamp, which is
limited by the adjustable screw j. When the magnet is weakened by the elonga-
tion of the arc, all parts travel rigidly downwards until the other end of the
lever e strikes the horizontal portion of the stop i, whereupon the lever releases
its grip on the rod and continues to swing downward, turning upon the level
surface of the stop as a fulcrum, the bevelled side permitting the lever to assume
the position shewn in Figure 2. Just before this final position is reached, one
side of the ring f, containing the pivot g¹, is retarded by the cross bar e³, the
other end of the link y continuing to move downwards with the lever e to release
the excentric toe from the carbon rod, while the lip e simultaneously rises
against the outer side of the ring f, and lifts it to a level position, to allow it to
free the rod and allow it to feed downwards. It is particularly desirable to bring
the ring to this level and free position when the clutch is lowered, because
it is in this position that the lamp is trimmed and it is necessary to be able to
move the carbon rod freely up and down through the clutch without interference
therewith.
'
The clutch which I have described furnishes a very sensitive device and one
which is not liable to release its grip upon the carbon rod when the lamp is jarred
or otherwise disturbed, since the double clutch furnishes a very ample grip.
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:-
1. In an arc lamp, a clutch for the carbon rod consisting of a perforated lever
through which the carbon rod passes and by which it is gripped, a second lever
or link pivoted to the first and controlling a second clutch device for the carbon
rod, in combination with a magnet armature by which the first lever is moved,
constructed and arranged substantially as hereinbefore described with reference
to the accompanying drawings.
i

page_text: 2. In an arc lamp, the combination with a magnet armature, of a perforated
lever pivoted thereto, a link pivoted to the said lever, a ring clutch surrounding
the carbon rod and pivoted to the said link which is provided with an excentric
surface adapted to engage the carbon rod when it is moved towards the plane
of the ring by the lever, substantially as hereinbefore described and as illustrated
by the accompanying drawings.
3. In an arc lamp, the combination of a ring and the link pivoted thereto and
provided with an excentric surface between which and the inner edge of the ring
the carbon rod is adapted to be clamped, the lever e to which the link is also
pivoted and which is provided with a cross bar and the projection e¹, the
magnet armature c to which the lever e is connected, and the stop having
horizontal and bevelled surfaces, substantially as and for the purposes herein-
before described with reference to the accompanying drawings.
4. A clutch for arc lamps, consisting of a ring through which the carbon rod
passes, a link pivoted in a radial opening in the said ring and provided with
an excentric surface adapted to engage the rod, a magnet core arranged to swing
the link on its pivot, and means to retard the movement of the ring while the
link swings, to thereby release the link from the carbon rod, substantially as
herein before described "with reference to the accompanying drawings.
5. Arc regulating mechanism for arc lamps, constructed arranged and operating
substantially as hereinbefore described and as illustrated by the accompanying
drawings.
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1X 1000