Improvements in Electric Arc Lamps.
Year: 1894

page_text: Date of Application, 27th Jan., 1894
Complete Specification Left, 25th June, 1894-Accepted, 28th July.
1894
Improvements in Electric Arc Lamps.
WILLIAM ALOYSIUS WALTON London Road, Gloucester Electrical Engineer
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the mechanism for feeding the carbons
in electric arc
lamps, also for automatically striking the arc by separating the
carbons when the electric circuit is completed.
Fig. 1 shows the arrangement as applied to a double carbon arc lamp, where
A A are the metal tubes or rods to which the carbons are attached, and which
slide down as the carbons are consumed.
Fig. 2 shows the clutch G H in plan.
The rod B is attached to the core of a solenoid, which is drawn upwards when
the electric current passes through the main winding of the said solenoid, raising
at the same time the hanger C. By means of the links DD, or other suitable
means, the lever E is raised at its extremity e, the other end being a fixed
fulcrum e. Some distance from e¹ a link F is pivotted at 2 and above this the
link F pivots into the lower portion G of a clutch G H.
This consists essentially of the strap H encircling the rod A and pivotted to G
as shown at g. The action of the clutch is as follows:-
On the lever E being raised by the solenoid, the lever G is also raised a
proportionately lesser distance by the link F, and as the part of G facing the
rod A is rounded eccentrically above the pivot g, it follows that the strap H is
tightened on the rod A, and on the further raising of E the rod A is raised bodily
the whole weight being carried on the lever E at e².
As the carbons become consumed and the distance between the points increases,
the current strength in the solenoid is diminished and the core, together with the
rod B descends until the clutch rests on the fixed support at J K. On the lever E
being further depressed, the portion of clutch G is also pulled down and turns on
the pivot a so loosening the band H and allows the rod A to descend and establish
the proper distance between the carbons. This accomplished, the current is
thereby increased to its normal strength, and the core, being drawn up again,
causes the clutch to grip the rod and stop its further descent.
January 27th 1894.
COMPLETE SPECIFICATION.
Improvements in Electric Arc Lamps.
I, WILLIAM ALOYSIUS WALTON of London Road, Gloucester, England,
Electrician, 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 :-
My invention relates to improvements in the mechanism for feeding the carbons
in electric arc lamps, also for automatically striking the arc by separating the
carbons when the electric circuit is completed.
Referring to the drawings filed with my Provisional Specification
Fig. 1 shews the arrangement as applied to a double carbon arc lamp where

page_text: A, A, are the metal tubes or rods to which the carbons are attached, and which
slide down as the carbons are consumed.
Fig. 2 shews the clutch G H in plan.
The rod B is attached to the core of a solenoid, which is drawn upwards when
the electric current passes through the main winding of the said solenoid, raising
at the same time the hanger C. By means of the links D, D, or other suitable
means, the lever E is raised at its extremity e, the other end being a fixed
fulcrum e. Some distance from e' a link F is pivotted at e³, and above this the
link pivots into the lever portion G of a clutch G, H.
This consists essentially of the strap H encircling the rod A and pivotted to G
as shewn at g.
The action of the clutch is as follows:-
On the lever E being raised by the solenoid the lever G is also raised a
proportionally lesser distance by the link F, and as the part of G facing the
rod A is rounded eccentrically above the pivot y, it follows that the strap His
tightened on the rod A, and on the further raising of E the rod A. is raised bodily,
the whole weight being carried on the lever E at e².
As the carbons become consumed and the distance between the points increases,
the current strength in the solenoid is diminished, and the core, together with the
rod B descends until the clutch rests on the fixed support at J. K. On the
lever E being further depressed, the portion of clutch G is also pulled down, and
turns on the pivot g, so loosening the band H and allows the rod A to descend and
establish the proper distance between the carbons. This accomplished, the
current is thereby increased to its normal strength and the core being drawn up
again causes the clutch to grip the rod.
Sudden movements of the solenoid core or carbon rods are prevented preferably
by means of dash-pots connected therewith.
If the lamps are for "series" or "multiple series" lighting a shunt coil would'
be used on the solenoid as well as the series or main winding.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, 1 declare that what
I claim is :-
(1) The combination with the vertical rods A and cross pieces connecting same,
of the clutches G H, which are operated by the raising of the arms G, causing the
said clutches to tighten the band H and grip the rods A as herein described and
set forth.
(2) The combination with the said rods and clutches of the levers E and links F,
whereby the ends of G are lifted a lesser distance than the rod B, by the operation
of the lever E as herein before described, whereby the solenoid receives the necessary
increase of power to lift the rods A bodily, after the clutches G, H have gripped
same, substantially as herein described and set forth.
Dated this 25th day of June 1894.
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicant.