Improvements in Electric Arc Lamps.
Year: 1895

page_text: Date of Application, 15th May, 1895
Complete Specification Left, 11th Feb., 1896-Accepted, 14th Mar., 1896
Improvements in Electric Arc Lamps.
We, SIEMENS BROTHERS & Co. LIMITED, of 12 Queen Anne's Gate,
Westminster, in the County of Middlesex, and FREDERICK BOOKER, of 2 Siebert
Terrace, Westcombe Park, in the County of Kent, Electrical Engineers, do hereby
declare the nature of this invention to be as follows:-
In the Specification No. 366 of 1888 is described a construction of electric arc
lamp in which the upper carbon is suspended from a spring barrel which rotates
subject to the control of an escapement when it is released from a stop by the
action of an electromagnet having its coil in a shunt to the lamp circuit.
The present invention relates to modifications in the construction of such lamps
which adapt them for being worked in series in considerable numbers.
For this purpose, we fix on the base which carries the regulating mechanism a
series electromagnet which has its coil in the lamp circuit. The armature of this
magnet is carried on a lever which when the lamp is not in circuit, is held back by
a spring and presses the pivotted frame which carries the regulating mechanism
into such a position that its escapement is released from the stop, and consequently
the upper carbon is free to descend and meet the lower carbon.
When the lamp
is put in circuit, the series electromagnet attracts its armature leaving the pivotted
frame free to ascend, striking the arc, and afterwards free to move in obedience to
the action of the regulating or shunt electromagnet. In order to provide for
maintenance of the general circuit when the lamp is extinguished, we employ a
short circuiting arrangement like that described in the Specification No. 6468 of
1893 attaching to the pivotted frame a contact plate which, when the frame
descends below the lowest position attained in its ordinary working, meets contacts
and effects short circuiting.
Dated this 15th day of May 1895.
ABEL & IMRAY,
Agents for the Applicants.
Improvements in Electric Arc Lamps.
We, SIEMENS BROTHERS & Co. LIMITED, of 12 Queen Anne's Gate,
Westminster, in the County of Middlesex, and FREDERICK BOOKER, of 2 Siebert
Terrace, Westcombe Park, in the County of Kent, Electrical Engineers, 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 the Specification No. 366 of 1888 is described a construction of electric arc
lamp in which the upper carbon is suspended from a spring barrel which rotates
subject to the control of an escapement when it is released from a stop by the
action of an electromagnet having its coil in a shunt to the lamp circuit.
The present invention relates to modifications in the construction of such lamps
which adapt them for being worked in series in considerable numbers, as we shall
Pril

page_text: describe referring to the accompanying drawings. Fig. 1 is a side view and Fig. 2
is a plan of the regulating mechanism arranged generally as described in the
Specification No. 366 of 1888 above referred to, but with a modification according
to the present invention as follows
We fix on the base a which carries the regulating mechanism a series electro-
magnet E which has its coil in the lamp circuit. The armature A of this magnet
is carried on a lever L which, when the lamp is not in circuit is held back by a
spring S and a projection F upon it presses the pivotted frame which carries the
regulating mechanism into such a position that its escapement is released from
the stop g and consequently the upper carbon frame e is free to descend allowing
the upper carbon to meet the lower carbon. When the lamp is put in circuit, the
electromagnet E attracts its armature A withdrawing the projection F from the
pivotted framer leaving it free to ascend, striking the arc, and afterwards free to
move in obedience to the action of the regulating or shunt electromagnet e.
In order to provide for maintenauce of the general circuit when the lamp is
extinguished, we employ a short circuiting arrangement like that described in the
Specification No. 6468 of 1893 attaching to the pivotted frame a contact plate
which, when the frame descends below the lowest position attained in its ordinary
working meets contacts and effects short circuiting.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In combination with the regulating mechanism of an electric arc lamp of the
kind described in the Specification No. 366 of 1893, the electromagnet E,
armature A and lever L with projection F and spring S arranged and operating,
substantially as described.
Dated this 10th day of February 1806
ABEL & IMRAY,
Agents for the Applicants.