Improvements in Electric Arc Lamps.
Year: 1898

page_text: Date of Application, TULI
Sept., 1908
ΟΛΟ
Complete Specification Left, 2nd June, 1899-Accepted, 9th Sept., 1899
και οι μμεναι
Complete Specification Left, 2nd June, 1899-Accepted, 9th Sept., 1899
PROVISIONAL SPECIFICATION.
Improvements in Electric Arc Lamps.
I, BENNARD HENRY POMEROY, of Union Place and Cherry Street, Brooklyn
Hills, in the State of New York, United States of America, Manufacturer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to certain features of construction of electric arc lamps,
and more especially to means for regulating or adjusting at will the amount of
resistance to be thrown in the circuit with each lamp, to the clutch feeding devices
which engage the upper carbon, and to the devices for maintaining electrical
contact with such carbon.
Referring to the accompanying drawings,
Figure 1 is a view in side elevation of a low tension, electric arc lamp to which
my improvements are applied ;
Figure 2 is a detail view, partly in section, illustrating the devices for main-
taining electrical contact with the upper carbon.
According to the first part of my invention, the resistance wire, represented
at A in the drawings, is arranged so that its successive coils or some of its coils
shall, for a portion of their length at least, stand in the same plane or in a plane
parallel with the path of movement of a movable contact shoe B which is arranged
to slide over and in contact with the successive coils of resistance wire. As
shown, the shoe B may be carried by a screw threaded shaft C which is mounted
in suitable bearings in the frame of the lamp and is provided with a head or
knob 1 above or outside of the frame of the lamp, by means of which the shaft
can be turned to shift the shoe up or down. The shoe is of course insulated from
the shaft. One end of the resistance wire is connected as usual to the other part
of the lamp and the circuit is completed from the resistance wire through the
shoe B and a flexible connector to the usual switch indicated at E. By such
means the amount of resistance included in the circuit can be adjusted at will.
The second part of my invention is concerned particularly with the clutch
adapted to engage the upper or movable carbon and carried by the metal sleeve F
which is secured to the yoke G of the magnet H. To the lower end of the
sleeve F is secured a head I from the outer ends or arms of which depend links i.
To the lower ends of the links are pivotally connected levers 21
which are pivotally mounted, at intermediate points on lugs projecting
from the upper surface of a plate 2, and at their inner ends have
pivotally attached the clutch shoes, which are adapted to bear upon opposite
sides of the upper or movable carbon, being slightly concave to fit the same.
It will he seen that during the upward movement of the sleeve F the clutch shoes
are caused to bear against and to grip the carbon, holding it as long as the plate
remains out of contact with the top or cap of the enclosing globe K. When
the sleeve F and the head I drop, the contact of the plate 12 with the top or cap
of the enclosing globe lifts the levers and carries the shoe slightly away from
the carbon, thereby releasing it and permitting it to descend.

page_text: The sleeve F is brought into circuit through the contact therewith of a con-
tact finger f, as usual, and in order to secure at all times the proper electrical
contact or connection between the sleeve F and the upper carbon, I have, as the
third part of my invention, formed within the head I, a recess or recesses it,
with the bottom inclined toward the carbon, and in such recess or recesses are
placed metal balls, which remain always in contact with the carbon and with
the head, thereby maintaining electrical connection at all times.
Dated this 19th day of September 1898.
PHILIP M. JUSTICE,
Chartered Patent Agent, London, for the Applicant.
1, BENNARD HENRY POMEROY, of Union Place and Cherry Street, Brooklyn
Hills, in the State of New York, United States of America, Manufacturer, 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 follow-
ing statement:―
This invention relates to certain features of construction of electric arc lamps,
and more especially to means for regulating or adjusting at will the amount of
resistance to be thrown in the circuit with each lamp, to the clutch feeding devices
which engage the upper carbon, and to the devices for maintaining electrical
contact with such carbon.
Referring to the drawings filed with my Provisional Specification.
Fig. 1 is a view in side elevation of a low tension electric arc lamp to which
my improvements are applied.
Fig. 2 is a detail view, partly in section, illustrating the devices for maintain-
ing electrical contact with the upper carbon.
According to the first part of my invention, the resistance wire, represented
at A in the drawings, is arranged so that its successive coils or some of its coils
shall, for a portion of their length at least, stand in the same plane or in a plane
parallel with the path of movement of a movable contact shoe B which is arranged
to slide over and in contact with the successive coils of resistance wire. As
shown, the shoe B may be carried by a screw threaded shaft (which is mounted
in suitable bearings in the frame of the lamp and is provided with a head or
knob Dabove or outside of the frame of the lamp by means of which the shaft
can be turned to shift the shoe up or down. The shoe is of course insulated from
the shaft. One end of the resistance wire is connected as usual to the other part
of the lamp and the circuit is completed from the resistance wire through the
shoe B and a flexible connector 6 to the usual switch indicated at E. By such
means the amount of resistance included in the circuit can be adjusted at will.
The second part of my invention is concerned particularly with the clutch
adapted to engage the upper or movable carbon and carried by the metal sleeve F
which is secured to the yoke G a solenoid or solenoids H. Any suitable con-
struction of the solenoid and its yoke or armature may be employed. In the form
shown it consists of two solenoids H placed side by side and the armature con-
sists of the horizontal plate & having a core for each solenoid at the corresponding
end, the sleeve F being connected centrally to such plate. To tue lower end of
the sleeve F is secured a head I from the outer ends or arms of which depend
links i. To the lower ends of the links are pivotally connected levers which
are pivotally mounted, at intermediate points on lugs projecting from the upper

page_text: surface of a plate 22, and at their inner ends have pivotally attached the clutch
shoes, which are adapted to bear upon opposite sides of the upper or movable
carbon, being slightly concave to fit the same. It will be seen that during the
upward movement of the sleeve F the clutch shoes are caused to bear against and
to grip the carbon, holding it as long as the plate remains out of contact with
the top or cap of the enclosing globe K. When the sleeve F and the head I drop,
the contact of the plate with the top or cap of the enclosing globe lifts the
levers and carries the shoe slightly away from the carbon, thereby releasing
it and permitting it to descend.
The sleeve is brought into circuit through the contact therewith of a con-
tact finger f, as usual, and in order to secure at all times the proper electrical
contact or connection between the sleeve F and the upper carbon, I have, as the
third part of my invention, formed within the head I, a recess or recesses it,
with the bottom inclined toward the carbon, and in such recess or recesses are
placed metal balls, which remain always in contact with the carbon and with
the head, thereby maintaining electrical connection at all times.
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. A resistance wire having its successive coils exposed, in combination with
a movable contact shoe arranged to slide in contact with said successive coils,
and connections from said resistance and said shoe respectively, substantially
as shown and described.
2. In an electric arc lamp, the combination of a resistance wire having its
successive coils exposed, a contact shoe arranged to slide in contact with the
successive coils, a screw threaded shaft upon which said shoe is mounted, and con-
nections from said resistance and from said shoe respectively, substantially as
shown and described.
3. In an electric arc lamp, the combination with the carbon controlling and
feeding solenoid and its yoke, of a sleeve surrounding the upper carbon, links
depending from said sleeve, levers pivotally connected to said link and mounted
upon a plate, and clutch shoes pivotally attached to the inner ends of said levers
and adapted to bear against the carbon, substantially as shown and described.
4. In an electric arc lamp, the combination with a movable metallic sleeve sur-
rounding the upper carbon, a contact finger resting against said sleeve, a head
secured to said sleeve and having therein a recess with its bottom inclined toward
the carbon, and metal balls placed in such recess and maintaining electrical con-
nection between the carbon and said head, substantially as shown and described.
Dated this 1st day of June 1899.
PHILIP M. JUSTICE,
Chartered Patent Agent, London, for the Applicant.