An Improvement amps.
Year: 1896

page_text: An Improvement
amps.
1, JAMES BROCKIE, of No. 12 Tyson Road, Forest Hill, in the County of
Kent, Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to means of giving freedom of movement to the carbons of
an electric arc lamp when the arc is struck and when they are moved to the position
at which they begin to feed, but to put a drag upon them automatically while
feeding goes on. For this purpose I connect the moveable carbon holder or one
of the carbon holders when both are moveable to a flexible tape which passes over
a guide pulley or segment which is provided with a stop permitting only such an
amount of movement as that of the carbons in striking the arc or coming to the
feeding position. After that movement the tape has to slide with friction over the
pulley or segment which thus operates as a brake preventing any rapid feeding
movement. When one of the carbon holders is moved by a lever, the guide segment
may be fixed on the lever, in which case it moves with the tape in the striking and
return movements offering no retarding friction, but after these movements are
made it operates as a drag during feeding.
ABEL & IMRAY,
Agents for the Applicant.
I, JAMES BROCKIE, of No. 12 Tyson Road, Forest Hill, in the County of
Kent, 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 :-
My invention relates to means of giving freedom of movement to the carbons of
an electric arc lamp when the arc is struck and when they are moved to the position
at which they begin to feed, but to put a drag upon them automatically while
feeding goes on. For this purpose, I construct and arrange the regulating
mechanism, as I shall describe referring to the accompanying drawings.
Fig. 1 is a side view and Fig. 2 a front view of one arrangement according to
my invention, Figs. 3 and 4 shewing a modification in two different positions.
As shewn in Figs. 1 and 2 I connect the lower carbon holder A to a flexible
tape or cord C which passes over a guide pulley B having a stop D which permits
only such an amount of movement of the pulley, as that of the carbon in striking
the arc, or coming to the feeding position. After that movement the tape has to
slide with friction over the pulley B which thus operates as a brake preventing
any rapid feeding movement.

page_text: As shewn in Figs. 3 and 4 the pulley B may have attached to it a ratchet
wheel E engaged by a spring pawl F, which, as shewn in Fig. 4, when near one
end of a tooth, gives certain freedom allowing the pulley to turn and the cord to
ascend for feeding the carbons; but preventing the pulley from turning beyond
that distance, the pulley then acting as a brake. By employing the ratchet wheel,
freedom is given to pull down the lower carbon holder when fresh carbons are
supplied.
Fig. 5 is a side view of a modification, in which the pulley B is mounted on a
lever L, shewn in plan in Fig. 6. In this case the pulley B moves along with the
tape or cord C when the arc is being struck and when the carbons return to feeding
position, offering no retarding friction until it becomes held by the lever and stop,
when it operates as a brake. As shewn in Fig. 7 a segment B' is substituted for
the pulley B, the tape or cord C being guided to pass over the segment by a guide
pulley G. Obviously for the pulley B in Figs. 1, 2, 5 and 6 a segment may be
substituted.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In an electric arc lamp wherein a carbon holder is suspended by a tape or cord,
passing that tape or cord over a pulley or segment provided with a suitable stop so
arranged that the pulley or segment is free to move offering no appreciable
resistance when the arc is being struck and the carbons are returning to feeding
position, but that it operates as a brake retarding the tape or cord in its feeding
movement substantially as described.
Dated this 7th day of January 1907
ABEL & IMRAY,.
Agents for the Applicant.