Year: 1896

page_text: I, JAMES BROCKIE of No. 12 Tyson Road, Forest Hill, in the County of Kent,
Engineer, do hereby declare the nature of this invention to be as follows:-
In my Specifications No. 18274, and No. 18274A of 1894 I have described
regulating apparatus for electric arc lamps in which a clutch is applied to the edge
of a rod carrying the upper carbon, or to the edge of a wheel caused to revolve by
the movement of the carbon.
According to the said invention, the rod on which the clutch acts is not of
uniform width but is tapered, its higher part being wider than its lower part; and,
in like manner, the wheel on which the clutch acts is not of uniform but of increasing
radius, so that, when, in either case, the clutch releases the rod or wheel, it can
only move a little, a part of greater width or greater radius almost immediately
engaging the clutch again and becoming stopped. As the clutches described in these
specifications become necessarily altered in position as the rod descends or the
wheel revolves, the feeding is liable to become somewhat irregular. The object
of my present invention is to avoid any such irregularity by the employment of a
clutch so constructed and worked that it acts uniformly on all parts of the rod or
wheel, the parts which are wider or of greater radius as well as the parts which
are narrower or of less radius.
For this purpose, I arrange the clutch for the taper rod as a sleeve which
embraces the rod except on the edge which increases in width, and on this side the
sleeve is formed with an inclined back, so that it is wider above than below. In
the sloping space between this back and the edge of the rod is lodged a ball or
roller, or it may be simply a wedge piece, which can play up and down between a
pair of stationary stops, and is pressed downwards by a light spring, to prevent it
from vibrating. The sleeve is suspended from one arm of a lever which is attached
to the core of a solenoid (which I may term the main) having its coil in the lamp
circuit, the other arm of the lever being attached to the core of a solenoid (which
I may term the shunt solenoid) having its coil in a shunt to the lamp circuit.
When the lamp is put in circuit, the main solenoid attracting its core raises the
sleeve and as the ball or its equivalent becomes wedged between the edge of the
rod and the back of the sleeve, the rod is raised, striking the arc. Afterwards, as
the carbons become consumed and the resistance of the arc is thus increased, the
shunt solenoid attracts its core, and the sleeve is thus lowered until the ball meets
the lower stop, whereupon the rod is for a moment released feeding the carbons.
This action is repeated as the rod descends its whole length, the sleeve also
descending a little so that the ball lies in a higher part of the space behind the
edge of the rod, finding room notwithstanding the greater width of the rod. In
applying a similar arrangement to the wheel of increasing radius, I employ instead
of a sliding sleeve, a sloping space formed at the end of a radius pivotted on the
axis of the wheel and suspended from the solenoid lever, this space containing a
ball, roller or wedge piece, which operates as above described.
The action of the parts may be inverted, that is to say the sleeve may be free to
play up and down between stops, and the ball, roller or wedge piece may be raised
and lowered by the solenoid lever. Also, instead of forming the sloping space for
. I

page_text: the ball or its equivalent at the end of a radius pivotted on the axis of the wheel,
it may be formed in a shoe having slots in its sides fitted to move along circular
ribs projecting from the sides of the wheel..
In some cases I connect not only the sleeve to the one arm of the solenoid lever,
but also the stops and spring for the ball or its equivalent to the other arm, so that
they move in a direction opposite to that of the sleeve, thereby requiring less stroke
for engaging and disengaging the carbon motor.
In order to provide against injury in case of the carbon holder being forcibly
moved, I prefer to hold the sloping back of the sleeve or space by a spring which
can yield to undue pressure.
Dated this 24th dor of March 1896
ABEL & IMRAY,
Agents for the Applicant.
I, JAMES BROCKIE, of No. 12 Tyson Road, Forest Hill, in the County of Kent,
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 :-
In my Specifications No. 18274 and No. 18274A of 1894 I have described regulating
apparatus for electric arc lamps in which a clutch is applied to the edge of a rod
carrying the upper carbon, or to the edge of a wheel caused to revolve by the
movement of the carbon.
According to the said invention, the rod on which the clutch acts is not of
uniform width but is tapered, its higher part being wider than its lower part; and,
in like manner, the wheel on which the clutch acts is not of uniform but of increasing
radius, so that, when, in either case, the clutch releases the rod or wheel, it can
only move a little, a part of greater width or greater radius almost immediately
engaging the clutch again and becoming stopped. As the clutches described in
these specifications become necessarily altered in position as the rod descends or
the wheel revolves, the feeding is liable to become somewhat irregular. The
object of my present invention is to avoid any such irregularity by the employment
of a clutch, so constructed and worked that it acts uniformly on all parts of the
rod or wheel, the parts which are wider or of greater radius, as well as the parts
which are narrower or of less radius.
For this purpose, I construct the clutch as 1 shall describe referring to the
accompanying drawings.
Fig. 1 is a side view partly in section of a clutch according to my present
invention applied to a tapered rod carrying the upper carbon. Fig. 2 is a sectional
plan on the line 2-2 of Fig. 1.
In Fig. 3 is shewn a modification, Fig. 4 being a sectional plan on the line 4-4
of Fig. 3.
I arrange the clutch as a sleeve A embracing the rod B except on the edge b
which increases in width, and on this side the sleeve is formed with an
inalined back a, so that it is wider above than below. In the sloping space between
this back a and the edge b of the rod is lodged a ball C or roller, or it may be
simply a wedge piece, which can play up and down between a pair of stationary
stops DE, and is pressed downwards by a light spring to prevent it from
vibrating. The sleeve is suspended from one arm of a lever which is attached to
the core of a solenoid M (which I may term the main) having its coil in the lamp
circuit, the other arm of the lever being attached to the core of a solenoid S

page_text: (which I may term the shunt solenoid) having its coil in a shunt to the lamp.
circuit. When the lamp is put in circuit the main solenoid M attracting its core
upwards raises the sleeve A and as the ball or its equivalent C becomes wedged
between the edge of the rod and the back of the sleeve, the rod B is also raised,
striking the arc. Afterwards, as the carbons become consumed and the resistance
of the arc is thus increased, the shunt solenoid S attracts its core, and the sleeve A
is thus lowered until the ball meets the lower stop D whereupon the rod B is for a.
moment released, feeding the carbons. This action is repeated as the rod B.
descends its whole length, the sleeve A also descending a little so that the ball C
lies in a higher part of the space behind the edge 6 of the rod, finding room.
notwithstanding the greater width of the rod B.
As shewn in Figs. 3 and 4 not only is the sleeve A connected to the one arm F
of the solenoid lever, but also the lower stop, in form of a pin D', is connected to
the other arm G, so that the stop D' and the ball or its equivalent, which rests on
the stop move in a direction opposite to that of the sleeve A, and thus less stroke
is required for engaging and disengaging the rod B.
In applying a similar arrangement to the wheel of increasing radius, I construct
the parts as shewn in side view partly sectional Fig. 5, and plan in Fig. 6, or
somewhat modified as shewn in Figs. 7 and 8.
As shewn in Figs. 5 and 6 I employ instead of a sliding sleeve a sloping space
formed at the end of a radius H pivotted on the axis of the wheel K and suspended
from the solenoid lever F, this space containing & ball, roller or wedge piece C,
which operates as above described in conjunction with the fixed stop D.
In the modification shewn in Figs. 7 and 8 a sleeve A suspended from the
lever F has a return hook L engaging within a circular rib N of the wheel K.
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 in respect of electric arc lamps, wherein the rod that feeds the carbon is
made of increasing width upwards, or the feeding wheel is made of increasing
radius, is :-
1. In combination with the rod of increasing width, a ball or its equivalent, held
in a sloping space at the one side of a sleeve, which partly embraces the rod, and
is suspended from the lever worked by the regulating solenoids, a stop or stops.
being provided for the ball, substantially as described.
2. The modification wherein the stop for the ball is connected to the one arm of
the solenoid lever, the sleeve being connected to the opposite arm, substantially as
and for the purpose set forth.
3. In combination with the wheel of increasing radius, a ball or its equivalent,
held in a sloping space formed in the end of a radius, which is mounted on the
axis of the wheel, and is connected to the solenoid lever, a stop being provided for
the ball, substantially as described.
4. The modification wherein the sloping space is formed in a sleeve which
engages a circular rib of the wheel and is connected to the solenoid lever,.
substantially as described.
DL: OD 11
Desemba 1906
ABEL & IMRAY,
Agents for the Applicant.