Improvements in and relating to Arc Lamps.
Year: 1895

page_text: Date of Application, 29th Oct., 1895-Accepted, 30th Nov., 1895
Improvements in and relating to Arc Lamps.
I, MALONE WHELESS, a citizen of the United States of America, of 32 Corcoran
Building, in the City of Washington, District of Columbia, United States of
America, 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 :-
This invention relates to an improvement in electric arc lamps, and consists in
the details of construction hereinafter pointed out and claimed.
In the annexed drawings-
Figure 1 represents an elevation of the entire device;
Figure 2, a detailed view of the counter-weight;
Figure 3, a vertical diametric section through one of the main solenoids;
Figure 4 a partial transverse diametric view, and a horizontal diametric view of
the core of the solenoid;
Figure 5, a top view of the negative carbon holder;
Figure 6, several views of the cut-out;
Figure 7, an enlarged transverse view of the same, and
Figure 8 a diagramimatic view of the wiring.
In these drawings-
The letter A represents the light chamber which is secured in the usual way to
the cap B, provided with the top central hollow boss, b. Passing down through
and secured firmly within this boss b is the positive carbon holder C, containing the
positive carbon D. Within the light chamber A, this positive carbon holder C is
made, near its lower end e with opposite siots c. Secured to the carbon holder C
at these slots c¹ is a band, E. In the earse of this band E are pivoted the grip
cams F whose operative edges pass through the slots c¹ and rest against the
positive carbon D. The outer ends of these cams F are pivoted to hangers f¹,
whose upper ends f2 are pivoted in a yoke G. This yoke G is secured to a sleeve g
which loosely surrounds the positive carbon holder C. This yoke G is secured by
nuts above and below it at its ends to rods h. The counter-weight G¹ is pivoted by
its arms g to each side of the yoke G, such counter-weight being also pivoted
by the lugs g to the brackets g³ depending from the cap B. This counter-weight
and the brackets are shown in dotted lines in Figure 1 so as not to confuse the
drawing.
The rods pass through the cap B, through tubes ', and are secured to the
cores H of the main solenoids I. These cores H are made of a number of vertical
rods held together by caps ³, as clearly shown in Figure 4. Secured to the
supports of the main solenoids is a plate L, on top of which is placed a small
solenoid . To the under side of the plate L is secured a bracket, in which is
pivoted the lever M which forms one part of the cut-out. At the end of this
lever M is made a head m³, consisting of the several layers m², m³, m³, m³, consisting
in order of red fibre, metal, red fibre and metal, secured together by the bolts m®.
Secured to the under side of the metal plate mo is the carbon contact m'. Supporting
rods n depend from the plate L and carry the other portion N of the cut-out. This
consists of the fibre plate and metal plate n² held together by bolts n³, and this
part N carries the other carbon contact n. Insulated to the cap B is the binding
Prin Q31

page_text: post O for the negative carbon holder. This consists of rods o and o', held together
by the tube of and the negative carbon clamp P. This clamp P has the two jaws, p
and p'. The jaw pl is held by the sleeve p" upon a horizontal rod p³ which is hel!
in the lower end of the rod o¹. Rising from the other end p¹ of this rod p³ is the
bar p, in which is a set screw and a steady pin p'. The inner ends of the set
screw and the steady pin p' engage the rear face of the jaw p. Between the two
jaws, p and the negative carbon Q is held; and it is clamped between the two
jaws by operating the set screw p°, the steady pin p' preventing the jaw p from
turning.
On the top of the cap B is placed the positive binding screw b', and in the cap B
is made the usual safety valve R.
The solenoids I are made of coarse and fine wire, as clearly indicated in Figure 3,
the wires being wound in reverse directions.
The line wire is connected with one solenoid I, and to the lever M of the cut-out.
The positive wire passes from the first solenoid I to the second solenoid I, thence
to the small solenoid 7, thence to the positive binding screw . From the part N
of the cut-out, negative wire passes to the binding screw O; and from this binding
screw the negative wire passes off to the line.
When the current is turned on, the three solenoids I, I, and are vitalized. The
two solenoids I operate in the usual way by the difference in the electro-motive
force produced by the differentiation between the reverse currents passing through
the coarse and fine windings. The cores H are acted upon by the solenoids and
through the yoke G and cams F act upon the positive carbon Ď. While the lamp
is in use, the solenoid is active and keeps open the cut-out M, N. Should the
lamp from any cause become inactive, the solenoid becomes devitalized, the two
parts M, N, contact, and the current passes around the lamp.
Having now particularly described and ascertained the nature of my said inven-
tiou, and in what manner the same is to be performed, I declare that what I
claim, is :-
1. The combination of the yoke, G; the cap, B, and the counter-weight, G¹;
the counter-weight being pivoted both to the cap and the yoke, as set forth.
2. The combination of the jaws, p, /', the latter having the sleeve p"; the rol, p³;
the bar, p; the set screw, and the steady pin p', as set forth.
3. The lever M, having the head, m', consisting of the several layers, m², m³, m²
and m³, consisting in order of red fibre, metal, red fibre and metal, and the bolts m³,
as set forth.
4. The combination of the solenoids, their hollow centres and the tubes; the
cap, B, the tubes being secured in holes in such cap; the cores of the solenoids and
the rods secured to such cores and passing down through the tube to the under side
of the cap; in combination with the cross-head secured to such rods, such cross-
head having at its middle a short tube; the positive carbon holder passing through
this tube and provided below the tube with slots; the binding canis secure I to the
positive carbon holder at such slots and also secured to the cross-heal, as set forth.
5. The combination of the positive carbon holder provided with slots; the
binding cams; the plates for holding such cams to the carbon holder and the clamp
for limiting the upward movement of the plates, as set forth.
6. The vertically movable controlling rod, a support therefor, and means for
limiting the movement of the rod in each direction, in combination with the
movable carbon holder and a pivoted or hinged carbon gripping dog carried by the
carbon holder and connected to the controlling rod, substantially as and for
the purposes herein before set forth.
7. The supporting cap and globe secured to and hanging from the same, the
solenoid mounted on said cap upon a tube closed at top and opening into the inhe
through the cap, in combination with a solenoid care in said tube, a carbon holder
carried by said core, a loose carbon within said holder, a controlling rod in muted
and vertically movable in a bracket attached to sid erpe gripping dog pivoted to

page_text: the movable carbon holder and connected to the controlling rod, and a stationary
ower carbon and carbon holder connected to and supported by the cap, arranged
for joint operation, as herein before set forth.
Dated this 29th day of October 1895.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.