An Improvement in Electrical Arc Lamps.
Year: 1888

page_text: Date of Application, 6th Dec., 1888.
Complete Specification Left, 5th Sept., '889-Accepted, 30th Nov.. 1889
PROVISIONAL SPECIFICATION.
An Improvement in Electrical Arc Lamps.
I, JAMES BROCKIE, of No. 65 Lowth Road, Camberwell, in the County of Surrey,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to a construction and arrangement of automatic clutch
apparatus for raising or lowering the upper carbon of an electrical are lamp. I pass
the carbon or its holder through a sleeve through which it is free to slide, this sleeve
being somewhat heavy or urged downwards by a spring. At one side of the sleeve
I pivot a horizontal lever having a tongue projecting down from it towards the
carbon. One end of this lever is linked by a connecting rod to the core of a
regulating solenoid or to the armature of a regulating electro magnet, the other end
of the lever, namely that which is on the same side of the carbon as the tongue, rests
upon a prop or is suspended freely by a slotted link. When the connecting rod is
raised by the action of the solenoid or electro magnet, the lever becomes canted so
that its tongue is pressed hard against the carbon or its holder, holding it as a
clutch, and by the farther ascent of the connecting rod the sleeve and carbon are
raised together. When the connecting rod descends, the lever on reaching the prop
or the end of its suspending slot, becomes canted back, releasing the carbon or its
bolder from the pressure of its tongue and thus leaving the carbon free to descend
in the sleeve.
Dated this 6th day of December 1888.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Electrical Arc Lamps.
1, JAMES BROCKIE of No. 65 Lowth Road Camberwell in the County of Surrey,
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 a construction and arrangement of automatic clutch
apparatus for raising or lowering the upper carbon of an electrical arc lamp. I pass
the carbon or its holder through a sleeve through which it is free to slide, this
sleeve being somewhat heavy or urged downwards by a spring. At one side of
this sleeve I pivot a horizontal lever having a tongue projecting down from it
towards the carbon. One end of this lever is linked by a connecting rod to the core
of a regulating solenoid or to the armature of a regulating electro magnet, the other.
end of the lever namely that which is on the same side of the carbon as the tongue,
rests upon a prop or is suspended freely by a slotted link. When the connecting
rod is raised by the action of the solenoid or electro magnet, the lever becomes
canted so that its tongue is pressed hard against the carbon or its holder holding it
as a clutch, and, by the further ascent of the connecting rod, the sleeve and carbon
are raised together. When the connecting rod descends, the lever on reaching the
prop or the end of its suspending slot, becomes canted back, releasing the carbon or
its holder from the pressure of its tongue, and, thus having the carbon free to descend
in the sleeve.
In the accompanying drawings, I have shewn my invention applied to an electric

page_text: lamp having two sets of carbons, the one set arranged to burn when the other set is
consumed. It is to be understood, however, that the clutch which I am about to
describe is equally applicable to a lamp with one set of carbons or to a lamp with
more than two sets. Fig. 1 is a side view partly in section and Fig. 3 is a plan of
the clutch. Fig. 2 being a side view partly in section of a modification. Fig. 4 is a
side view partly in section of the upper part of the lamp. Fig. 5 is an end view of
the whole lamp. Fig. 6 is a plan on X and Fig. 7 is a plan on Y of Fig. 4.
A is the upper carbon or its holder passed freely through a sleeve B which is
somewhat heavy or may be urged downwards by a spring. In the one side; of
the sleeve B there is pivotted at Pa horizontal lever C, one end J of which rests on
an adjustable prop K as shewn in Fig. 1, or, as shewn in Fig. 2, is jointed to a
rod L which is suspended by a slotted hole M from a pin projecting from any con-
venient part of the stationary lamp frame or casing. The other end of the lever is
linked by a rod F and lever S to the core of a regulating solenoid or electro
magnet of any known kind such that when it is excited, the rod is drawn
upwards.
I have shewn in Fig. 4 a double regulating solenoid, the one G having its coil of
comparatively low resistance, in the lamp circuit, and the other having a coil of
high resistance in a shunt or by-pass to the lamp circuit. The iron 'core h of the
solenoid H hangs freely from one arm of a lever S² to tlie other end of which is
jointed a tube T of brass or other non magnetic metal. In the tube T is fixed an
iron button Wimmediately above the iron core g When the solenoid G is excited,
the button W by attraction to g forms a connection from y to T; when G is not
excited, y is free from T. To the lever under its pivot is fixed by adjusting screws
a tongue D which projects towards the carbon or its holder A.and which forms a clutch
for raising the carbon or for releasing it and allowing it to descend in the following
inanner. Assuming that the upper and lower carbons, (which are connected by a cord
passing over a pulley) are close together and that the lamp is switched into circuit.
The solenoid G being thus excited draws up its core raising the lever S-and the
rod F. The lever being thus raised at its one end brings the tongue D to bear
against the carbon or its holder A, and then, by the farther ascent of the core g, the
sleeve B is raised, raising the carbon with it. The are being thus struck, the
regulation goes on automatically. When by consumption of the carbons the
resistance of the arc becomes too great, the solenoid G. loses and the solenoid H
gains power, and the sleeve Bis permitted to descend. When it descends so far that
the one end of the lever rests on the prop K or is stopped by the pin reaching the
end of the slot M, then by the continued descent of the other end of the lever C,
the tongue D is withdrawn from the carbon or its holder A leaving the carbon free
to descend, until the resistance of the arc is so far diminished that the clutch is again.
brought into action to raise the carbon. In the lamp shewn in the drawings there
are two sets of the clutch apparatus, one for each pair of carbons, both "sets worked
by the one pair of solenoids G and H, but the prop K for the lever Chelonging to
the one pair of carbons is made somewhat lower than that for the other pair;!so that
while those of the former sét are burning those of the other set do not approach so,
near to each other as to strike tlie are. When, however the former carbons are so
far consumed that an arm a projecting from the holder A comes to rest on a roller
on the lever S so as to prevent that carbon from descending farther than permitted by
the lever S, then the second set of carbons come into action and become regulated in
their turn.
..:
£
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is':-
Automatic clutch apparatus for regulating the carbons of an electrical arc lamp,
consisting of a sleeve B free to slide on the upper carbon or its holder A, a lever C
pivotted on the sleeve and carrying a clutch tongue D, the one end of the lever C.

page_text: Date of Application, 6th Dec., 1888.
Complete Specification Left, 5th Sept., 1889-Accepted, 30th Nov.. 1889
PROVISIONAL SPECIFICATION.
An Improvement in Electrical Arc Lamps.
I, JAMES BROCKIE, of No. 65 Lowth Road, Camberwell, in the County of Surrey,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
-
My invention relates to a construction and arrangement of automatic clutch
apparatus for raising or lowering the upper carbon of an electrical arc lamp. I pass
the carbon or its holder through a sleeve through which it is free to slide, this sleeve
being somewhat heavy or urged downwards by a spring. At one side of the sleeve
I pivot a horizontal lever having a tongue projecting down from it towards the
carbon. One end of this lever is linked by a connecting rod to the core of a
regulating solenoid or to the armature of a regulating electro magnet, the other end
of the lever, namely that which is on the same side of the carbon as the tongue, rests
upon a prop or is suspended freely by a slotted link. When the connecting rod is
raised by the action of the solenoid or electro magnet, the lever becomes canted so
that its tongue is pressed hard against the carbon or its holder, holding it as a
clutch, and by the farther ascent of the connecting rod the sleeve and carbon are
raised together. When the connecting rod descends, the lever on reaching the prop
or the end of its suspending slot, becomes canted back, releasing the carbon or its
holder from the pressure of its tongue and thus leaving the carbon free to descend
in the sleeve.
Dated this 6th day of December 1888.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Electrical Arc Lamps.
I, JAMES BROCKIE of No. 65 Lowth Road Camberwell in the County of Surrey,
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 a construction and arrangement of automatic clutch
apparatus for raising or lowering the upper carbon of an electrical are lamp. I pass
the carbon or its holder through a sleeve through which it is free to slide, this
sleeve being somewhat heavy or urged downwards by a spring. At one side of
this sleeve I pivot a horizontal lever having a tongue projecting down from it
towards the carbon. One end of this lever is linked by a connecting rod to the core
of a regulating solenoid or to the armature of a regulating electro magnet, the other.
end of the lever namely that which is on the same side of the carbon as the tongue,
When the connecting
rests upon a prop or is suspended freely by a slotted link.
rod is raised by the action of the solenoid or electro magnet, the lever becomes
canted so that its tongue is pressed hard against the carbon or its holder holding it
as a clutch, and, by the further ascent of the connecting rod, the sleeve and carbon
are raised together. When the connecting rod descends, the lever on reaching the
prop or the end of its suspending slot, becomes canted back, releasing the carbon or
its holder from the pressure of. its tongue, and, thus having the carbon free to descend
in the sleeve.
In the accompanying drawings, I have shewn my invention applied to an electric

page_text: Jamp having two sets of carbons, the one set arranged to burn when the other set is
consumed. It is to be understood, however, that the clutch which I am about to
describe is equally applicable to a lamp with one set of carbons or to a lamp with
more than two sets. Fig. 1 is a side view partly in section and Fig. 3 is a plan of
the clutch. Fig. 2 being a side view partly in section of a modification. Fig. 4 is a
side view partly in section of the upper part of the lamp. Fig. 5 is an end view of
the whole lamp. Fig. 6 is a plan on X and Fig. 7 is a plan on Y of Fig. 4.
A is the upper carbon or its holder passed freely through a sleeve B which is
somewhat heavy or may be. urged downwards by a spring. In the one side; of
the sleeve B there is pivotted at Pa horizontal lever C, one end J of which rests on
an adjustable prop K as shown in Fig. 1, or, as shewn in Fig. 2, is jointed to a
rod L which is suspended by a slotted hole M from a pin projecting from any con-
venient part of the stationary lamp frame or casing. The other end of the lever U is
linked by a rod F and lever S to the core of a regulating solenoid or electro
magnet of any known kind such that when it is excited, the rod is drawn
upwards.
I have shewn in Fig. 4 a double regulating solenoid, the one G having its coil of
comparatively low resistance, in the lamp circuit, and the other H having a coil of
high resistance in a shunt or by-pass to the lamp circuit. The iron 'core of the
solenoid H hangs freely from one arm of a lever $2 to the other end of which is
jointed a tube T of brass or other non magnetic metal. In the tube T is fixed an
iron button Wimmediately above the iron core g When the solenoid G is excited,
the button W by attraction to g forms a connection from y to T; when G is not
excited, g is free from T. To the lever under its pivot is fixed by adjusting screws
a tongue D which projects towards the carbon or its holder A and which forms a cluteli
for, raising the carbon or for releasing it and allowing it to descend in the following
inanner. Assuming that the upper and lower carbons, (which are connected by a cord
passing over a pulley) are close together and that the lamp is switched into circuit.
The solenoid G being thus excited draws up its core raising the lever S-and the
rod F. The lever being thus raised at its one end brings the tongue D to bear
against the carbon or its holder A, and then, by the farther ascent of the core g, the
sleeve B is raised, raising the carbon with it. The arc being thus struck, the
regulation goes on automatically. When by consumption of the carbons the
resistance of the are becomes too great, the solenoid. G. loses and the solenoid H
gains power and the sleeve Bis permitted to descend. When it descends so far that
the one end of the lever rests on the prop K or is stopped by the pin reaching the
end of the slot M, then by. the continued descent of the other end of the lever U;
the tongue D is withdrawn from the carbon or its holder A leaving the carbon free
to descend, until the resistance of the arc is so far diminished that the clutch is again
brought into action to raise the carbon. In the lamp shewn in the drawings there
are two sets of the clutch apparatus, one for each pair of carbons, both sets worked
by the one pair of solenoids G and H, but the prop K for the lever Chelonging to
the one pair of carbons is made somewhat lower than that for the other pair; so that,
while those of the former sét are burning those of the other set do not approach so,
hear to each other as to strike tlie arc. When, however the former carbons are so
far consumed that an arm a projecting from the holder A comes to: rest on a roller
on the lever S so as to prevent that carbon from descending farther than permitted by
the lever S, then the second set of carbons come into action and become regulated in.
their turn.
Di
1
25
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is':—
Automatic clutch apparatus for regulating the carbons of an electrical arc lamp,
consisting of a sleeve B free to slide on the upper carbon or its holder A, a lever C
pivotted on the sleeve and carrying a clutch tongue D, the one end of the lever C.
•:*

page_text: K
being arranged to rest on a fixed stop K or M and the other end being linked to the
core of a regulating solenoid or to the armature of an electromagnet so as to be raised
when the solenoid or electromagnet is excited by the lamp current, substantially as
described.
Dated this 5th 1...
_L1000
ABEL & IMRAY,
Agents for the Applicant.