An Improved Carbon Regulator for Arc Lamps.
Year: 1894

page_text: Date of Application, 22nd Sept., 1894-Accepted, 1st Dec., 1894
COMPLETE SPECIFICATION.
An Improved Carbon Regulator for Arc Lamps.
I, LEON ZAUSMER of Bialystok in the Empire of Russia Merchant, 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 refers to the automatic adjustment of the carbon pencils employed
in arc electric lamps, and is designed to supply a simple and effective mode of
keeping them in contiguity in all states of the weather.
I will now describe the invention with reference to the accompanying drawings.
The two carbons ww of the arc lamp shewn in Fig. 1 are mounted on the
sticks, which are connected to the pistons m m² fitted to slide in the guide
tubes a, b.
These tubes are of unequal diameter as shewn, the lower being smaller than the
upper. They are connected by the tube e, and the upper tube a is also connected
by the pipe to the tuber in which is the valve R. This tube » connects to the
container which holds compressed air. Referring to Fig. 2, which shews the
simplest form of the valve and magnets on an enlarged scale, the valve R is
furnished with a lever F, at each end of which are pieces of soft iron F1 by means
of which the lever is governed by the magnetic coils E, E¹, and thereby the supply
of air from the container v, to the guide tubes or cylinders a and b, is regulated.
The electric current which passes through the electro-magnet E' passes first
through a badly conducting substance at y, in order to heighten the resistance in
the current. If now the current is stopped or lessened by the carbon points
becoming too far from each other, and the light is thereby shut off from the arc
lamp, then a diminished current passes through E', and the piece of soft iron F¹ is
attracted towards the magnet, whereby the valve R opens and the supply of air
passes into the cylinders a, b, and brings the carbons nearer together. The
proximity of the carbons causes the diminished current (passing through E¹) to
cease, and the main current resumes its course through E, and the attraction no
longer drawing the iron F1, the lever F, resumes its vertical position, and the
valve R closes. This action repeats itself as the carbons become consumed.
Figs. 3, 4 and 5 show a more elaborate form of valve governed with ratchet and
pawls by means of which the supply of air can be regulated with great nicety.
Fig. 3 shows an enlarged transverse section of this air valve on the line o―p of
Fig. 5.
Fig. 4 shows an elevation of the ratchet wheels and pawls.
Fig. 5 shows a cross sectional elevation of the air valve and its ratchet wheels.
The hollow cone B rotates in the tuber and is furnished with the radial
slots 1, 11, 11.
In this cone is the plug D which turns, and is also provided with the air
passage z. B and D are furnished on one side with the ratchet teeth 2 and 4 and
the spring detents 3 and 5.
When the electro-magnet attracts one of the soft iron pieces F¹, the lever F
turns the pin K and with it the plug D, so that the air passage ¹ comes into line
with the slots 1³, 1¹.
If now the electro-magnet E¹ attracts the lever F then B and D turn together
until the detent 5 engages with one of the teeth 4. This turning continues until
the slots 11, 111, come into line with the passage z', and in this way the air outlet.
in the container v, opens to the tube e. The electro magnet E now attracts the

page_text: lever back, B remains stationary and the plug D only turns.
of air is thus prevented.
An untimely escape
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 :-
1. A regulator for arc-lamps by which the carbons are guided by pistons working
in two cylindrical tubes a and b of unequal dimensions and whereby the admission
of compressed air from the reservoir v occurs through a special valve R, and results
from the turning of the lever F, by an electro magnet E, and the contiguity of the
carbons to each other allows the lever to resume its vertical position as herein
described and set forth.
2. A special form of valve R, as drawn, consisting of the hollow cone B, provided
with slots 1, and the plug D, both furnished with ratchet teeth and detent hooks,
whereby both or D only may be turned, and any untimely escape of air prevented
as herein described and set forth.
Datad this 22nd day of Santomlion 1004
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Agent for Applicant.