IMPROVEMENTS IN ELECTRIC LAMPS OF THE ARC TYPE
Year: 1882

page_text: LETTERS PATENT to Rankin Kennedy of Glasgow in the County of Lanark
North Britain Electrician-for an invention of "IMPROVEMENTS IN ELECTRIC
LAMPS OF THE ARC TYPE"
PROVISIONAL SPECIFICATION left by the said Rankin Kennedy at the
Office of the Comunissioners of Patents on the 16th May 1882.
RANKIN KENNEDY, of Glasgow, in the County of Lanark, North Britain,
Electrician, "IMPROVEMENTS IN ELECTRIC LAMPS OF THE ARC TYPE,"
This Invention which relates to Improvements in Electric Lamps of the arc type,
is a further development of the Invention for which Letters Patent were applied
for by the said Rankin Kennedy on the Thirteenth day of March A.D. 1882
No. 1199.
The present Improvements consist in substituting for the Soft Iron tube
described in the Provisional Specification accompanying the said Application a tube
or core of material other than Soft Iron, such as Brass, Copper, Wood, Vulcanite,
and other suitable materials, and it is to be understood that the Solenoids used in
the said arc Lamps may be of Iron or other metallic wire.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Rankin Kennedy in the Great Seal Patent Office on
15th November 1882.
the
RANKIN KENNEDY, of Glasgow, in the County of Lanark, North Britain
Electrician IMPROVEMENTS IN ELECTRIC LAMPS OF THE ARC TYPE
"
"
My said Invention which relates to Improvements in Electric Lamps of the
arc type, is a further development of the Invention for which Letters Patent
were granted to the said Rankin Kennedy on the Thirteenth day of March A.D. 1882
No 1199.
The present improvements consist in substituting for the soft Iron tube
described in the Specification of the before mentioned Patent a tube or core of
material other than soft Iron, such as Brass, Copper, Wood, Vulcanite, or other
suitable materials, and it is to be understood that the Solenoid used in the said Arc
Lamps may be of Iron or other metallic wire.
In constructing a Lamp according to this Invention the moveable coil is made
of soft Iron wire wound on a wooden, or brass, or other non-magnetic substance.-
The moveable coil then acts both as the shunt Solenoid and as the magnetic core.
Having n ✓ described and particularly ascertained the nature of my said
Invention, and the system, mode, or manner, in or under which the same is, or
may be, used or practically carried into effect, I would observe in conclusion that
what I consider to be novel and original and therefore claim as the Invention
secured to me by the hereinbefore in part recited Letters Patent is :-
The making of the moveable armature or core of a Solenoid Arc Lamp regulator
of a coil of soft Iron wire wound on a wooden, or brass, or other non-magnetic
substance through which a current is shunted past the arc and which coil also at
the same time acts as the armature or soft Iron core of the lamp described in my
former Specification No 1199 A.D. 1882 wherein it is made of a cylindrical rod or
tube of Iron or which I now explain may be of conical or of other form.
In witness whereof I, the said Rankin Kennedy, have hereunto set my hand
and Seal this Fourteenth day of November in the year of Our Lord One
Thousand Eight Hundred and Eighty-two.
זיו ווג'ד
E A ALETT