An Electric Arc Lamp.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
An Electric Arc Lamp.
I, FRANCIS EDWARD BEAUMONT Electrician 10 Summer St. Fenton Road Halifax
do hereby declare the nature of this invention to be as follows:-
From one Common Centre work two Arms one arm Carrying the Positive
Carbon holder the other carrying the Negative holder the length from the Centre
to Carbons being 6 inches, but from the Centre to the Centre line of coils is only
1 inch and a quarter (that is from, the back of the Common Centre). The Arms at
this point are in a Circle with the Centre or (Convolute) so that the iron Cores of the
Negative & Positive Coils, are always in a line with the Centre of Coils. This
is what I claim,
The Cores are fastened on to the Convolutes by a light Flat Steel Spring so that
whatever length of Carbon may be in the holders, the Cores of the Coils are
always swinging in the Centre. The Core Springs are fastened on to each Arm
(Convolutes). There are no dash pots required. There are teeth on each Convolute
(or arm) with a small wheel running between them carrying a Friction Wheel.
Dated this 21 day of December 1896.
F. E. BEAUMONT.
I FRANCIS EDWARD BEAUMONT Electrician 10 Summer St. King Cross Halifax
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:-
From a Common Centre work two arms, one. carrying the Positive Carbon,
the other the Negative Carbon the length of the arms from the Centre to Carbons
being 6 inches, from the Centre opposite the Carbons (at the back of the Centre)
is an arc on each arm whose radius is 24 inches & the Arc is 40 degrees of a Circle.
The Iron Cores are suspended by fine Steel Springs from these Arcs (or Con-
volutes) one on each Arm so that the Cores are always in a straight line, or pull
in the Coils.
I may use silk tape on the Arcs or Chains, and can also groove the Arcs, for
Silk Cord, or fine Wires, or Any other Material of a Flexible Nature.
Reference to Drawings
al and all are the Arcs upon which the fine Steel tape Springs are fastened to.
61 and 6 are the fine Steel Tape Springs.
and are the Iron Cores which are turned smaller at one end, the Smaller

page_text: end being inside the Coils or Solenoids, and the larger ends being outside the
Coils or Solenoids having a fine Slit Sawn down the Centres to receive the Spring
tape, which is fastened to them by Small pins which go through the Centre of the
Cores, and the Spring tape
c and care the Coils or Solenoids
c¹ being the Series Coil and cl the Shunt Coil or Solenoids
E. A Parrelell Steel Pin upon which the Arms or Ares move.
F and F are the Arms Carrying the Carbon holders
GA Wheel Connecting the two Arcs or Arms gearing into teeth cut on the
inner face of Arcs
When the lamp is ready for use and when Switched on, the current flows through
the Series Coil ci on to the arm F through the Positive Carbon and on through
the Negative Carbon up the Arm F to the Negative Terminal, thus completing
the circuit. The Series Coil pulls the iron Core d and establishes the Arc. As
Soon as the Carbons are Separated, the Shunt Coil c¹ comes into Operation, thus
keeping the carbons at one uniform distance apart. The lamp is for Direct or
Alternating Currents.
Having now particularly described and ascertained the nature of my said In-
vention, and in what manner the same is to be performed, I declare that what I
claim is;
1. An Arc lamp having Series and Shunt Coils or Solenoids in the Centre of
which works iron Tapered Cores connected by fine Steel tape or Springs to the
Arcs or Convolutes which work upon a Steel Centre pin substantially as set forth.
2. The Arcs upon which the fine Steel tape or Springs is fastened to
3. Or any other Material of a flexible Nature besides the use of Fine Steel Tape,
such as Silk Ribbon, or tape, band, and Chains.
4. The Arcs may be grooved for Cord or Fine wire. The Arcs are connected by
a toothed wheel working between them. The said Arcs having teeth cut upon
their inner face.
Dated this 23d day of November 1907