Improvements in Arc Lamps.
Year: 1889

page_text: Date of Application, 19th Aug., 1889
Complete Specification Left, 12th Apr., 1890-Accepted, 28th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Arc Lamps.
JOHN HALL RIDEK Electrical Engineer Northern Telegraph Works Square Road
Halifax do hereby declare the nature of this invention to be as follows, namely:-
Improvements in the arc striking and feed mechanisms of electric are lamps. I
employ a rocking frame pivoted at its centre and capable of being moved or controlled
in its movements by electro magnets or solenoids the armatures or cores of which are
fixed either one to each end of the rocking frame or both at one end and the coils of
which are wound with main circuit and shunt windings. One carbon rod is racked
and gears by a pinion with a brake wheel the centres of which are carried in a second
rocking frame. The two rocking frames and the wheel having their axes parallel.
These two rocking frames are connected by a link so that the movements of the one
control the movements of the other. Upon this link is fixed any suitable form of
brake so placed as to engage with the rim of the wheel when the frames are lifted.
When the current is started the magnet or solenoid in the main circuit lifts one
end of the first rocking frame and by means of the link lifts the second rocking frame
and the brake wheel. The wheel would simply rotate on its centres and on the rack but
the link and the rocking frames are placed in such relative positions that directly the
rocking frames are lifted the brake presses against the wheel and so stops its rotation.
The further lifting of the rocking frames then lifts the rack with the wheel and draws
the arc. The shunt magnet or solenoid opposes and influences the action of the series
and this opposition increases as the arc burns longer. The effect of this is to gradually
lower the wheel and rocking frames until the wheel is freed from the brake and
so allows the lamp to feed. The brake is immediately put on again by the action of
the magnets or solenoids when required as before described.
The weight of the wheel and its rocking frame is carried by the first rocking frame
through the link and the brake simply prevents or allows the wheel to rotate and does.
not in any way lift the wheel or directly pull the arc.
Dated this 16th day of August 1889.
JOHN HALL RIDER.
COMPLETE SPECIFICATION.
Improvements in Arc Lamps.
JOHN HALL RIDER of Northern Telegraph Works, Halifax, 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:-
This invention relates to improvements in the arc striking and feeding mechanisms
of electric arc lamps whereby the mechanical arrangements are much simplified and
the movements of the carbons to or from each other are kept under perfect control.
In carrying out this invention I employ a rocking frame pivotted about its centre
and capable of being moved or controlled in its movements by electro magnets or
solenoids the armatures or cores of which are fixed either one to each end or both at
one end of the rocking frame and the coils of which are wound with main circuit and
shunt windings.
One carbon rod is racked and gears into the pinion of a brake wheel the centres of
which are carried in a second rocking frame, the two rocking frames and the wheel
having their axes parallel. These two rocking frames are connected by means of a
ID 227

page_text: link so that the movements of the one control the movements of the other. Upon this
link is fixed any suitable form of brake so placed as to engage with the wheel
when the frames are lifted.
When the current is started the magnet or solenoid in the main circuit lifts one
end of the first rocking frame and by means of the link lifts the second rocking frame
and the brake wheel. The wheel would simply rotate on its centres and on the rack
but the link and the rocking frames are placed in such relative positions that directly
the rocking frames are lifted the brake presses against the wheel and so stops its
rotation. The further lifting of the rocking frames then lifts the rack with the
wheel and so draws the arc. The shunt magnet or solenoid opposes and influences
the action of the series and this opposition increases as the are burns longer. The
effect of this is to gradually lower the wheel and rocking frames until the wheel is
freed from the brake and so allows the lamp to feed. The brake is immediately put
on again by the combined action of the magnets or solenoids when required as
before described.
The brake is either composed of flexible material such as rubber etc. or is mounted
upon the link in a flexible holder so that it may be compressed when the arc is pulled.
The weight of the wheel and its rocking frame is carried by the first rocking frame
through the link and the brake simply prevents or allows the wheel to rotate and does
not in any way lift or move the wheel or directly pull the arc.
Fig. 1 of the accompanying drawings shows the general construction of an arc lamp
according to this invention. A and B are the solenoids in the shunt and main circuits
respectively and A and B are the cores of the said solenoids connected to either end
of the first rocking frame C which is pivotted at D. The brake wheel E is carried in
the second rocking frame F which is pivotted at G.
The two rocking frames are connected. by the link H which also carries the brake J.
The frames are so weighted thai when no current is on the core B is on the heavier
side and the position of the system is as in Fig. 2 where the brake J just clears the
rim of the brake wheel E and so allows the upper carbon rod to be lifted and the lamp
trimmed. Fig. 3 shows the positions when the arc is pulled the wheel E having been
lifted and the brake J having been brought into contact with the rim of the wheel thus
preventing it from rotating.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
First. In electric are lamps the combination of two rocking frames one being
controlled by the current and the other carrying a brake wheel substantially as
described and illustrated in the accompanying drawings.
Second. In electric arc lamps the combination of two rocking frames and a link
connecting the two frames substantially as described and illustrated.
Third. In electric arc lamps the combination of a connecting link and a flexible
brake fixed upon the said link substantially as described.
Dated this 11th day of April 1890.
JOHN H. RIDER.