Improvements in Feeding Mechanism for Electric Arc Lamps.
Year: 1895

page_text: Date of Application, 22nd Jan., 1895
Complete Specification Left, 22nd Oct.. 1895-Accepted, 7th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in Feeding Mechanism for Electric Arc Lamps.
We, HENRY BEVIS, Electrician and GUSTAV BINSWANGER Electrician both
of 69-71 Queen Victoria Street in the City and County of London do hereby
declare the nature of this invention to be as follows:-
'
Our invention relates to certain improvements in electric arc lamps and has for
its object the construction and arrangement of a compact and simple hand feed for
drawing together, or parting the carbon electrodes, and also providing means
for striking the arc, independently of said feed. Such apparatus may be adapted
to projectors, or to lamps employed for stage purposes, or the like.
In carrying our invention into effect we construct a frame the longitudinal
member of which is a round or polygonal rod carrying a bracket at each extremity,
in which a spindle may revolve parallel to the rod aforesaid. Said spindle is
provided with a right and left handed screw thread engaging with suitable nuts
corresponding thereto. Each nut is attached to the base of a sliding carriage,
which freely moves upon the longitudinal rod, this latter acting as a guide bar.
Suitable carbon holders are attached to the sliding carriages aforesaid, and one or
both are insulated therefrom, suitable binding posts or terminals being attached in
such a manner as to project between the screw spindle and the guide rod aforesaid.
One of said carbon holders is mounted upon the carriage by means of a pivot, so
as to admit of its being turned back, thus parting the carbon points, (when these
are in position) in an angular direction, and thereby striking the arc upon recoil.
Said recoil is effected by means of a spiral spring in tension, which maintains the
pivotted carbon holder in its normal position suitable screws, sockets, or equivalent
devices for attaching or adjusting the frame are fixed to, or formed upon the
brackets at each end of the frame.
We may modify the details of construction to meet the requirements of various
cases of adaptation without departing from the essential features of our said
invention.
Dated this 17th day of January 1895.
FREDK.
WALKER,
73 St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.
We, HENRY BEVIS, Electrician and GUSTAV BINSWANGER Electrician both
of 69-71-Queen Victoria Street in the City and County of London 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 :-
Our invention relates to certain improvements in electric arc lamps and has for
its object the construction and arrangement of a compact and simple hand feed for

page_text: drawing together or parting the carbon electrodes, and also providing means for
striking the arc independently of said feed. Such apparatus may be adapted to
projectors, or to lamps employed for stage purposes or the like.
In order that our invention may be the better understood, we have appended the
accompanying sheet of drawings, in which
Figure 1 is a side elevation of the lamp and Figure 2 a front elevation of the
same.
Figure 3 is a side elevation of the lower carbon holder, drawn to a larger scale,
with a dotted outline showing a possible change of position.
Similar letters of reference indicate corresponding parts in the several views.
In carrying our invention into effect we construct a frame, the longitudinal
member of which, A Figures 1 and 2 is a round or. polygonal rod carrying &
bracket B B at each extremity, in which a spindle C may revolve parallel to the
rod aforesaid. Said spindle C is provided with a right and left handed screw
thread engaging with suitable nuts D D¹. Each nut D D¹ is attached to a sliding
carriage E E which freely moves upon the longitudinal rod A, this latter acting
as a guide bar. Suitable carbon holders F F are attached to the sliding
carriages E E¹ aforesaid, and one or both are insulated therefrom, suitable binding
posts or terminals G G¹ being attached in such a manner as to project between the
screw spindle C and the guide rod A. One of said carbon holders, preferably the
lower, F, is mounted upon the carriage E¹ by means of a pivot a, so as to admit of
its being turned back, thus parting the carbon points H H₁ (when these are in
position,) in an angular direction, as shewn more particularly by the detached and
enlarged view Figure 3. This admits of said holder FI striking the arc upon
recoil when turned back and released, said recoil being effected by means of a
spiral spring b, Figure 2, maintained in tension which holds the carbon holder F¹
in its normal position. A suitable socket I with a binding screw c is fixed to, or
forms the base of the frame. The length of the arc is regulated by the hand
wheel W, operating the screw spindle C.
We may modify the details of construction to meet the requirements of various
cases of adaptation without departing from the essential features of our said
invention.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
First. In an electric arc lamp, the combination of a screw spindle C, with a
guide A, brackets B B', sliding carriages E E¹ and a pivotted carbon holder F¹
substantially as and for the purposes herein specified, with reference to the drawings
hereto appended.
Second. In an electric arc lamp with a right and left handed screw for feeding
and a guide for the carriages, the combination of a pivotted carbon holder F¹ with
a spring b substantially as and for the purposes herein set forth, with especial
reference to Figures 2 and 3 of the appended sheet of drawingɛ.
Dated this 21st day of October 1895.
FREDK. WALKER,
73 St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.